mifosx-58: wip - refactoring api for loan schedule data - introduced new schedule in prep for supporting charges.

mifosng-provider/src/main/java/org/mifosng/platform/api/LoansApiResource.java

@@ -37,7 +37,6 @@ import org.mifosng.platform.api.data.LoanChargeData;
 import org.mifosng.platform.api.data.LoanPermissionData;
 import org.mifosng.platform.api.data.LoanProductLookup;
 import org.mifosng.platform.api.data.LoanRepaymentTransactionData;
-import org.mifosng.platform.api.data.LoanSchedule;
 import org.mifosng.platform.api.data.LoanScheduleData;
 import org.mifosng.platform.api.data.LoanTransactionData;
 import org.mifosng.platform.api.data.MoneyData;
@@ -273,49 +272,50 @@ public class LoansApiResource {
 
 		if (is(commandParam, "calculateLoanSchedule")) {
 			CalculateLoanScheduleCommand calculateLoanScheduleCommand = command.toCalculateLoanScheduleCommand();
-			NewLoanScheduleData loanSchedule = this.calculationPlatformService.calculateLoanScheduleNew(calculateLoanScheduleCommand);
-		
-			final Set<String> typicalLoanScheduleResponseParameters = new HashSet<String>(
-					Arrays.asList("periods", "cumulativePrincipalDisbursed"));
-			
-			Set<String> responseParameters = ApiParameterHelper.extractFieldsForResponseIfProvided(uriInfo.getQueryParameters());
-			if (responseParameters.isEmpty()) {
-				responseParameters.addAll(typicalLoanScheduleResponseParameters);
-			}
-			boolean prettyPrint = ApiParameterHelper.prettyPrint(uriInfo.getQueryParameters());
-			
-			return this.apiJsonSerializerService.serializeLoanScheduleDataToJson(prettyPrint, responseParameters, loanSchedule);
+			return calculateLoanSchedule(uriInfo, calculateLoanScheduleCommand);
 		}
 
 		final EntityIdentifier identifier = this.loanWritePlatformService.submitLoanApplication(command);
 
 		return this.apiJsonSerializerService.serializeEntityIdentifier(identifier);
 	}
+
+	private String calculateLoanSchedule(final UriInfo uriInfo, final CalculateLoanScheduleCommand command) {
+		
+		final NewLoanScheduleData loanSchedule = this.calculationPlatformService.calculateLoanScheduleNew(command);
+
+		final Set<String> typicalLoanScheduleResponseParameters = new HashSet<String>(
+				Arrays.asList("periods", "cumulativePrincipalDisbursed"));
+		
+		Set<String> responseParameters = ApiParameterHelper.extractFieldsForResponseIfProvided(uriInfo.getQueryParameters());
+		if (responseParameters.isEmpty()) {
+			responseParameters.addAll(typicalLoanScheduleResponseParameters);
+		}
+		boolean prettyPrint = ApiParameterHelper.prettyPrint(uriInfo.getQueryParameters());
+		
+		return this.apiJsonSerializerService.serializeLoanScheduleDataToJson(prettyPrint, responseParameters, loanSchedule);
+	}
 	
 	@PUT
 	@Path("{loanId}")
 	@Consumes({MediaType.APPLICATION_JSON})
 	@Produces({MediaType.APPLICATION_JSON})
-	public Response modifyLoanApplication(
+	public String modifyLoanApplication(
 			@PathParam("loanId") final Long loanId,
-			@QueryParam("command") final String commandParam,
+//			@QueryParam("command") final String commandParam,
+//			@Context final UriInfo uriInfo,
 			final String jsonRequestBody) {
 
 		final LoanApplicationCommand command = this.apiDataConversionService.convertJsonToLoanApplicationCommand(loanId, jsonRequestBody);
 
-		// for now just auto generating the loan schedule and setting support
-		// for 'manual' loan schedule creation later.
-//		command.setLoanSchedule(loanSchedule);
+//		if (is(commandParam, "calculateLoanSchedule")) {
+//			CalculateLoanScheduleCommand calculateLoanScheduleCommand = command.toCalculateLoanScheduleCommand();
+//			return calculateLoanSchedule(uriInfo, calculateLoanScheduleCommand);
+//		}
 
-		if (is(commandParam, "calculateLoanSchedule")) {
-			final CalculateLoanScheduleCommand calculateLoanScheduleCommand = command.toCalculateLoanScheduleCommand();
-			final LoanSchedule loanSchedule = this.calculationPlatformService.calculateLoanSchedule(calculateLoanScheduleCommand);
-			return Response.ok().entity(loanSchedule).build();
-		}
+		final EntityIdentifier identifier = this.loanWritePlatformService.modifyLoanApplication(command);
 
-		EntityIdentifier identifier = this.loanWritePlatformService.modifyLoanApplication(command);
-
-		return Response.ok().entity(identifier).build();
+		return this.apiJsonSerializerService.serializeEntityIdentifier(identifier);
 	}
 
 	@DELETE
@@ -324,8 +324,7 @@ public class LoansApiResource {
 	@Produces({ MediaType.APPLICATION_JSON })
 	public Response deleteLoanApplication(@PathParam("loanId") final Long loanId) {
 
-		EntityIdentifier identifier = this.loanWritePlatformService
-				.deleteLoan(loanId);
+		EntityIdentifier identifier = this.loanWritePlatformService.deleteLoan(loanId);
 
 		return Response.ok().entity(identifier).build();
 	}

mifosng-provider/src/main/java/org/mifosng/platform/api/NewLoanScheduleData.java

@@ -3,6 +3,7 @@ package org.mifosng.platform.api;
 import java.math.BigDecimal;
 import java.util.Collection;
 
+import org.mifosng.platform.api.data.CurrencyData;
 import org.mifosng.platform.api.data.LoanSchedulePeriodData;
 
 /**
@@ -16,10 +17,18 @@ import org.mifosng.platform.api.data.LoanSchedulePeriodData;
 @SuppressWarnings("unused")
 public class NewLoanScheduleData {
 
+	private final Integer loanTermInDays;
+	
+	/**
+	 * The currency associated with all monetary values in loan schedule.
+	 */
+	private final CurrencyData currency;
+	
 	/**
 	 * The cumulative total of all money (principal) disbursed to the loan applicant.
 	 */
 	private final BigDecimal cumulativePrincipalDisbursed;
+	private final BigDecimal cumulativePrincipalDue;
 	private final BigDecimal cumulativePrincipalPaid;
 	private final BigDecimal cumulativePrincipalOutstanding;
 	
@@ -55,13 +64,16 @@ public class NewLoanScheduleData {
 	private final BigDecimal totalInArrears;
 	
 	/**
-	 * <code>periods</code> 
+	 * <code>periods</code> is collection of data objects containing specific
+	 * information to each period of the loan schedule including disbursment and
+	 * repayment information.
 	 */
 	private final Collection<LoanSchedulePeriodData> periods;
 
 	public NewLoanScheduleData() {
 		this.cumulativePrincipalDisbursed = null;
 		this.cumulativePrincipalPaid = null;
+		this.cumulativePrincipalDue = null;
 		this.cumulativePrincipalOutstanding = null;
 		
 		this.cumulativeInterestExpected = null;
@@ -78,28 +90,52 @@ public class NewLoanScheduleData {
 		this.totalExpectedRepayment = null;
 		this.totalInArrears = null;
 		
+		this.currency = null;
 		this.periods = null;
+		this.loanTermInDays = null;
 	}
 
-	public NewLoanScheduleData(final Collection<LoanSchedulePeriodData> periods) {
+	public NewLoanScheduleData(
+			final CurrencyData currency,
+			final Collection<LoanSchedulePeriodData> periods, 
+			final Integer loanTermInDays, 
+			final BigDecimal cumulativePrincipalDisbursed, 
+			final BigDecimal cumulativePrincipalDue, 
+			final BigDecimal cumulativePrincipalOutstanding, 
+			final BigDecimal cumulativeInterestExpected, 
+			final BigDecimal cumulativeChargesToDate, 
+			final BigDecimal totalExpectedRepayment) {
+		this.currency = currency;
 		this.periods = periods;
+		this.loanTermInDays = loanTermInDays;
 		
-		this.cumulativePrincipalDisbursed = null;
+		this.cumulativePrincipalDisbursed = cumulativePrincipalDisbursed;
+		this.cumulativePrincipalDue = cumulativePrincipalDue;
 		this.cumulativePrincipalPaid = null;
-		this.cumulativePrincipalOutstanding = null;
+		this.cumulativePrincipalOutstanding = cumulativePrincipalOutstanding;
 		
-		this.cumulativeInterestExpected = null;
+		this.cumulativeInterestExpected = cumulativeInterestExpected;
 		this.cumulativeInterestPaid = null;
 		this.cumulativeInterestWaived = null;
 		this.cumulativeInterestOutstanding = null;
 		
-		this.cumulativeChargesToDate = null;
+		this.cumulativeChargesToDate = cumulativeChargesToDate;
 		this.cumulativeChargesPaid = null;
 		this.cumulativeChargesOutstanding = null;
 		
-		this.totalCostOfLoan = null;
+		if (cumulativeChargesToDate != null) {
+			this.totalCostOfLoan = cumulativeInterestExpected.add(cumulativeChargesToDate);
+		} else if (cumulativeInterestExpected != null) {
+			this.totalCostOfLoan = cumulativeInterestExpected;
+		} else {
+			this.totalCostOfLoan = null;
+		}
 		
-		this.totalExpectedRepayment = null;
+		this.totalExpectedRepayment = totalExpectedRepayment;
 		this.totalInArrears = null;
 	}
+
+	public Collection<LoanSchedulePeriodData> getPeriods() {
+		return periods;
+	}
 }

mifosng-provider/src/main/java/org/mifosng/platform/api/data/LoanSchedule.java

@@ -3,6 +3,7 @@ package org.mifosng.platform.api.data;
 import java.util.ArrayList;
 import java.util.List;
 
+@Deprecated
 public class LoanSchedule {
 
 	private List<ScheduledLoanInstallment> scheduledLoanInstallments = new ArrayList<ScheduledLoanInstallment>();

mifosng-provider/src/main/java/org/mifosng/platform/api/data/LoanSchedulePeriodData.java

@@ -111,4 +111,28 @@ public class LoanSchedulePeriodData {
 		
 		this.totalDueForPeriod = totalDueForPeriod;
 	}
+
+	public boolean isRepaymentPeriod() {
+		boolean isRepaymentPeriod = false;
+		if (principalDue != null && this.interestDue != null) {
+			isRepaymentPeriod = BigDecimal.ZERO.compareTo(this.principalDue) == -1 || BigDecimal.ZERO.compareTo(this.interestDue) == -1;
+		}
+		return isRepaymentPeriod;
+	}
+
+	public Integer periodNumber() {
+		return this.period;
+	}
+
+	public LocalDate periodDueDate() {
+		return this.dueDate;
+	}
+
+	public BigDecimal principalDue() {
+		return this.principalDue;
+	}
+
+	public BigDecimal interestDue() {
+		return this.interestDue;
+	}
 }

mifosng-provider/src/main/java/org/mifosng/platform/api/data/ScheduledLoanInstallment.java

@@ -4,6 +4,7 @@ import java.math.BigDecimal;
 
 import org.joda.time.LocalDate;
 
+@Deprecated
 public class ScheduledLoanInstallment {
 
 	private Integer installmentNumber;

mifosng-provider/src/main/java/org/mifosng/platform/api/infrastructure/ApiDataConversionServiceImpl.java

@@ -439,56 +439,54 @@ public class ApiDataConversionServiceImpl implements ApiDataConversionService {
 			throw new InvalidJsonException();
 		}
 		
-		Type typeOfMap = new TypeToken<Map<String, String>>(){}.getType();
-	    Map<String, String> requestMap = gsonConverter.fromJson(json, typeOfMap);
+		Type typeOfMap = new TypeToken<Map<String, Object>>(){}.getType();
+	    Map<String, Object> requestMap = gsonConverter.fromJson(json, typeOfMap);
 	    
 	    Set<String> supportedParams = new HashSet<String>(
-	    		Arrays.asList("clientId", "productId", "externalId", "fundId", "transactionProcessingStrategyId",
-	    				"principal", "inArrearsTolerance", "interestRatePerPeriod", "repaymentEvery", "numberOfRepayments", 
-	    				"loanTermFrequency", "loanTermFrequencyType", "charges",
-	    				"repaymentFrequencyType", "interestRateFrequencyType", "amortizationType", "interestType", "interestCalculationPeriodType",
-	    				"expectedDisbursementDate", "repaymentsStartingFromDate", "interestChargedFromDate", "submittedOnDate", "submittedOnNote",
-	    				"locale", "dateFormat", "loanOfficerId")
+    		Arrays.asList("clientId", "productId", "externalId", "fundId", "transactionProcessingStrategyId",
+    				"principal", "inArrearsTolerance", "interestRatePerPeriod", "repaymentEvery", "numberOfRepayments", 
+    				"loanTermFrequency", "loanTermFrequencyType", "charges",
+    				"repaymentFrequencyType", "interestRateFrequencyType", "amortizationType", "interestType", "interestCalculationPeriodType",
+    				"expectedDisbursementDate", "repaymentsStartingFromDate", "interestChargedFromDate", "submittedOnDate", "submittedOnNote",
+    				"locale", "dateFormat", "loanOfficerId", "id")
 	    );
 	    
 	    checkForUnsupportedParameters(requestMap, supportedParams);
 	    
 	    Set<String> modifiedParameters = new HashSet<String>();
-
-	    Long clientId = extractLongParameter("clientId", requestMap, modifiedParameters);
-	    Long productId = extractLongParameter("productId", requestMap, modifiedParameters);
-	    Long fundId = extractLongParameter("fundId", requestMap, modifiedParameters);
-	    Long loanOfficerId = extractLongParameter("loanOfficerId", requestMap, modifiedParameters);
-	    Long transactionProcessingStrategyId = extractLongParameter("transactionProcessingStrategyId", requestMap, modifiedParameters);
-	    String externalId = extractStringParameter("externalId", requestMap, modifiedParameters);
 	    
-	    BigDecimal principal = extractBigDecimalParameter("principal", requestMap, modifiedParameters);
-	    BigDecimal inArrearsToleranceValue = extractBigDecimalParameter("inArrearsTolerance", requestMap, modifiedParameters);
-	    BigDecimal interestRatePerPeriod = extractBigDecimalParameter("interestRatePerPeriod", requestMap, modifiedParameters);
+	    JsonParser parser = new JsonParser();
+	    JsonElement element = parser.parse(json);
+	    JsonParserHelper helper = new JsonParserHelper();
 	    
-	    Integer repaymentEvery = extractIntegerParameter("repaymentEvery", requestMap, modifiedParameters);
-	    Integer numberOfRepayments = extractIntegerParameter("numberOfRepayments", requestMap, modifiedParameters);
-	    Integer repaymentFrequencyType = extractIntegerParameter("repaymentFrequencyType", requestMap, modifiedParameters);
+	    final Long clientId = helper.extractLongNamed("clientId", element, modifiedParameters);
+	    final Long productId = helper.extractLongNamed("productId", element, modifiedParameters);
+	    final Long fundId = helper.extractLongNamed("fundId", element, modifiedParameters);
+	    final Long loanOfficerId = helper.extractLongNamed("loanOfficerId", element, modifiedParameters);
+	    final Long transactionProcessingStrategyId = helper.extractLongNamed("transactionProcessingStrategyId", element, modifiedParameters);
+	    final String externalId = helper.extractStringNamed("externalId", element, modifiedParameters);
+	    final BigDecimal principal = helper.extractBigDecimalNamed("principal", element, modifiedParameters);
+	    final BigDecimal inArrearsToleranceValue = helper.extractBigDecimalNamed("inArrearsTolerance", element, modifiedParameters);
+	    final BigDecimal interestRatePerPeriod = helper.extractBigDecimalNamed("interestRatePerPeriod", element, modifiedParameters);
 	    
-	    Integer loanTermFrequency = extractIntegerParameter("loanTermFrequency", requestMap, modifiedParameters);
-	    Integer loanTermFrequencyType = extractIntegerParameter("loanTermFrequencyType", requestMap, modifiedParameters);
+	    final Integer repaymentEvery = helper.extractIntegerNamed("repaymentEvery", element, modifiedParameters);
+	    final Integer numberOfRepayments = helper.extractIntegerNamed("numberOfRepayments", element, modifiedParameters);
+	    final Integer repaymentFrequencyType = helper.extractIntegerNamed("repaymentFrequencyType", element, modifiedParameters);
+	    final Integer loanTermFrequency = helper.extractIntegerNamed("loanTermFrequency", element, modifiedParameters);
+	    final Integer loanTermFrequencyType = helper.extractIntegerNamed("loanTermFrequencyType", element, modifiedParameters);
+	    final Integer interestRateFrequencyType = helper.extractIntegerNamed("interestRateFrequencyType", element, modifiedParameters);
+	    final Integer amortizationType = helper.extractIntegerNamed("amortizationType", element, modifiedParameters);
+	    final Integer interestType = helper.extractIntegerNamed("interestType", element, modifiedParameters);
+	    final Integer interestCalculationPeriodType = helper.extractIntegerNamed("interestCalculationPeriodType", element, modifiedParameters);
 	    
-	    Integer interestRateFrequencyTypeValue = extractIntegerParameter("interestRateFrequencyType", requestMap, modifiedParameters);
-	    Integer amortizationTypeValue = extractIntegerParameter("amortizationType", requestMap, modifiedParameters);
-	    Integer interestTypeValue = extractIntegerParameter("interestType", requestMap, modifiedParameters);
-	    Integer interestCalculationPeriodTypeValue = extractIntegerParameter("interestCalculationPeriodType", requestMap, modifiedParameters);
+	    final LocalDate expectedDisbursementDate = helper.extractLocalDateNamed("expectedDisbursementDate", element, modifiedParameters);
+	    final LocalDate repaymentsStartingFromDate = helper.extractLocalDateNamed("repaymentsStartingFromDate", element, modifiedParameters);
+	    final LocalDate interestChargedFromDate = helper.extractLocalDateNamed("interestChargedFromDate", element, modifiedParameters);
+	    final LocalDate submittedOnDate = helper.extractLocalDateNamed("submittedOnDate", element, modifiedParameters);
 	    
-	    LocalDate expectedDisbursementDate = extractLocalDateParameter("expectedDisbursementDate", requestMap, modifiedParameters);
-	    LocalDate repaymentsStartingFromDate = extractLocalDateParameter("repaymentsStartingFromDate", requestMap, modifiedParameters);
-	    LocalDate interestChargedFromDate = extractLocalDateParameter("interestChargedFromDate", requestMap, modifiedParameters);
-	    LocalDate submittedOnDate = extractLocalDateParameter("submittedOnDate", requestMap, modifiedParameters);
+	    final String submittedOnNote = helper.extractStringNamed("submittedOnNote", element, modifiedParameters);
 	    
-	    String submittedOnNote = extractStringParameter("submittedOnNote", requestMap, modifiedParameters);
-
-        JsonParser parser = new JsonParser();
-
         LoanChargeCommand[] charges = null;
-        JsonElement element = parser.parse(json);
         if (element.isJsonObject()) {
             JsonObject object = element.getAsJsonObject();
             if (object.has("charges") && object.get("charges").isJsonArray()) {
@@ -518,8 +516,8 @@ public class ApiDataConversionServiceImpl implements ApiDataConversionService {
 				resourceIdentifier, clientId, productId, externalId, fundId, transactionProcessingStrategyId,
 				submittedOnDate, submittedOnNote, 
 	    		expectedDisbursementDate, repaymentsStartingFromDate, interestChargedFromDate, 
-	    		principal, interestRatePerPeriod, interestRateFrequencyTypeValue, interestTypeValue, interestCalculationPeriodTypeValue, 
-	    		repaymentEvery, repaymentFrequencyType, numberOfRepayments, amortizationTypeValue, 
+	    		principal, interestRatePerPeriod, interestRateFrequencyType, interestType, interestCalculationPeriodType, 
+	    		repaymentEvery, repaymentFrequencyType, numberOfRepayments, amortizationType, 
 	    		loanTermFrequency, loanTermFrequencyType,
 	    		inArrearsToleranceValue, charges,loanOfficerId);
 	}

mifosng-provider/src/main/java/org/mifosng/platform/api/infrastructure/JsonParserHelper.java

@@ -0,0 +1,353 @@
+package org.mifosng.platform.api.infrastructure;
+
+import java.math.BigDecimal;
+import java.text.DecimalFormat;
+import java.text.DecimalFormatSymbols;
+import java.text.NumberFormat;
+import java.text.ParseException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Locale;
+import java.util.Set;
+
+import org.apache.commons.lang.StringUtils;
+import org.joda.time.LocalDate;
+import org.joda.time.format.DateTimeFormat;
+import org.mifosng.platform.api.data.ApiParameterError;
+import org.mifosng.platform.exceptions.PlatformApiDataValidationException;
+import org.springframework.context.i18n.LocaleContextHolder;
+import org.springframework.format.number.NumberFormatter;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonPrimitive;
+
+/**
+ * Helper class to extract values of json named attributes.
+ */
+public class JsonParserHelper {
+
+	public Long extractLongNamed(final String parameterName, final JsonElement element, final Set<String> modifiedParameters) {
+		Long longValue = null;
+		if (element.isJsonObject()) {
+			JsonObject object = element.getAsJsonObject();
+			if (object.has(parameterName) && object.get(parameterName).isJsonPrimitive()) {
+				modifiedParameters.add(parameterName);
+				JsonPrimitive primitive = object.get(parameterName).getAsJsonPrimitive();
+				final String stringValue = primitive.getAsString();
+				if (StringUtils.isNotBlank(stringValue)) {
+					longValue = Long.valueOf(stringValue);
+				}
+			}
+		}
+		return longValue;
+	}
+
+	public String extractStringNamed(final String parameterName, final JsonElement element, final Set<String> modifiedParameters) {
+		String stringValue = null;
+		if (element.isJsonObject()) {
+			JsonObject object = element.getAsJsonObject();
+			if (object.has(parameterName) && object.get(parameterName).isJsonPrimitive()) {
+				modifiedParameters.add(parameterName);
+				JsonPrimitive primitive = object.get(parameterName).getAsJsonPrimitive();
+				if (StringUtils.isNotBlank(stringValue)) {
+					stringValue = primitive.getAsString();
+				}
+			}
+		}
+		return stringValue;
+	}
+
+	public BigDecimal extractBigDecimalNamed(final String parameterName, final JsonElement element, final Set<String> modifiedParameters) {
+		BigDecimal value = null;
+		if (element.isJsonObject()) {
+			JsonObject object = element.getAsJsonObject();
+			if (object.has(parameterName) && object.get(parameterName).isJsonPrimitive()) {
+				modifiedParameters.add(parameterName);
+				JsonPrimitive primitive = object.get(parameterName).getAsJsonPrimitive();
+				String valueAsString = primitive.getAsString();
+				if (StringUtils.isNotBlank(valueAsString)) {
+					value = convertFrom(valueAsString, parameterName, extractLocaleValue(object));
+				}
+			}
+		}
+		return value;
+	}
+	
+	public Integer extractIntegerNamed(final String parameterName, final JsonElement element, final Set<String> modifiedParameters) {
+		Integer value = null;
+		if (element.isJsonObject()) {
+			JsonObject object = element.getAsJsonObject();
+			if (object.has(parameterName) && object.get(parameterName).isJsonPrimitive()) {
+				modifiedParameters.add(parameterName);
+				JsonPrimitive primitive = object.get(parameterName).getAsJsonPrimitive();
+				String valueAsString = primitive.getAsString();
+				if (StringUtils.isNotBlank(valueAsString)) {
+					value = convertToInteger(valueAsString, parameterName, extractLocaleValue(object));
+				}
+			}
+		}
+		return value;
+	}
+
+	public LocalDate extractLocalDateNamed(final String parameterName, final JsonElement element, final Set<String> modifiedParameters) {
+		LocalDate value = null;
+		if (element.isJsonObject()) {
+			JsonObject object = element.getAsJsonObject();
+
+			String dateFormat = null;
+			final String dateFormatParameter = "dateFormat";
+			if (object.has(dateFormatParameter) && object.get(dateFormatParameter).isJsonPrimitive()) {
+				JsonPrimitive primitive = object.get(dateFormatParameter).getAsJsonPrimitive();
+				dateFormat = primitive.getAsString();
+			}
+			
+			if (object.has(parameterName) && object.get(parameterName).isJsonPrimitive()) {
+				modifiedParameters.add(parameterName);
+				JsonPrimitive primitive = object.get(parameterName).getAsJsonPrimitive();
+				final String valueAsString = primitive.getAsString();
+				if (StringUtils.isNotBlank(valueAsString)) {
+					value = convertFrom(valueAsString, parameterName, dateFormat);
+				}
+			}
+			
+		}
+		return value;
+	}
+	
+	private LocalDate convertFrom(final String dateAsString, final String parameterName, final String dateFormat) {
+		
+		if (StringUtils.isBlank(dateFormat)) {
+			
+			List<ApiParameterError> dataValidationErrors = new ArrayList<ApiParameterError>();
+			String defaultMessage = new StringBuilder("The parameter '" + parameterName + "' requires a 'dateFormat' parameter to be passed with it.").toString();
+			ApiParameterError error = ApiParameterError.parameterError("validation.msg.missing.dateFormat.parameter", defaultMessage, parameterName);
+			dataValidationErrors.add(error);
+			
+			throw new PlatformApiDataValidationException(
+					"validation.msg.validation.errors.exist",
+					"Validation errors exist.", dataValidationErrors);
+		}
+		
+		LocalDate eventLocalDate = null;
+		if (StringUtils.isNotBlank(dateAsString)) {
+			try {
+				Locale locale = LocaleContextHolder.getLocale();
+				eventLocalDate = DateTimeFormat.forPattern(dateFormat)
+						.withLocale(locale)
+						.parseLocalDate(dateAsString.toLowerCase(locale));
+			} catch (IllegalArgumentException e) {
+				List<ApiParameterError> dataValidationErrors = new ArrayList<ApiParameterError>();
+				ApiParameterError error = ApiParameterError
+						.parameterError(
+								"validation.msg.invalid.date.format",
+								"The parameter "
+										+ parameterName
+										+ " is invalid based on the dateFormat provided:"
+										+ dateFormat, parameterName,
+								dateAsString, dateFormat);
+				dataValidationErrors.add(error);
+
+				throw new PlatformApiDataValidationException(
+						"validation.msg.validation.errors.exist",
+						"Validation errors exist.", dataValidationErrors);
+			}
+		}
+
+		return eventLocalDate;
+	}
+	
+	private BigDecimal convertFrom(final String numericalValueFormatted, final String parameterName, final Locale clientApplicationLocale) {
+
+		if (clientApplicationLocale == null) {
+			
+			List<ApiParameterError> dataValidationErrors = new ArrayList<ApiParameterError>();
+			String defaultMessage = new StringBuilder("The parameter '" + parameterName + "' requires a 'locale' parameter to be passed with it.").toString();
+			ApiParameterError error = ApiParameterError.parameterError("validation.msg.missing.locale.parameter", defaultMessage, parameterName);
+			dataValidationErrors.add(error);
+			
+			throw new PlatformApiDataValidationException(
+					"validation.msg.validation.errors.exist",
+					"Validation errors exist.", dataValidationErrors);
+		}
+		
+		try {
+			BigDecimal number = null;
+			
+			if (StringUtils.isNotBlank(numericalValueFormatted)) {
+				
+				String source = numericalValueFormatted.trim();
+				
+				NumberFormat format = NumberFormat.getNumberInstance(clientApplicationLocale);
+				DecimalFormat df = (DecimalFormat) format;
+				DecimalFormatSymbols symbols = df.getDecimalFormatSymbols();
+				// http://bugs.sun.com/view_bug.do?bug_id=4510618
+				char groupingSeparator = symbols.getGroupingSeparator();
+				if (groupingSeparator == '\u00a0') {
+					source = source.replaceAll(" ", Character.toString('\u00a0'));
+			    }
+				
+				NumberFormatter numberFormatter = new NumberFormatter();
+				Number parsedNumber = numberFormatter.parse(source, clientApplicationLocale);
+				number = BigDecimal.valueOf(Double.valueOf(parsedNumber.doubleValue()));
+			}
+
+			return number;
+		} catch (ParseException e) {
+
+			List<ApiParameterError> dataValidationErrors = new ArrayList<ApiParameterError>();
+			ApiParameterError error = ApiParameterError.parameterError(
+					"validation.msg.invalid.decimal.format", "The parameter "
+							+ parameterName + " has value: " + numericalValueFormatted + " which is invalid decimal value for provided locale of ["
+							+ clientApplicationLocale.toString() + "].",
+					parameterName, numericalValueFormatted,
+					clientApplicationLocale);
+			dataValidationErrors.add(error);
+
+			throw new PlatformApiDataValidationException(
+					"validation.msg.validation.errors.exist",
+					"Validation errors exist.", dataValidationErrors);
+		}
+	}
+	
+private Integer convertToInteger(final String numericalValueFormatted, final String parameterName, final Locale clientApplicationLocale) {
+		
+		if (clientApplicationLocale == null) {
+			
+			List<ApiParameterError> dataValidationErrors = new ArrayList<ApiParameterError>();
+			String defaultMessage = new StringBuilder("The parameter '" + parameterName + "' requires a 'locale' parameter to be passed with it.").toString();
+			ApiParameterError error = ApiParameterError.parameterError("validation.msg.missing.locale.parameter", defaultMessage, parameterName);
+			dataValidationErrors.add(error);
+			
+			throw new PlatformApiDataValidationException(
+					"validation.msg.validation.errors.exist",
+					"Validation errors exist.", dataValidationErrors);
+		}
+		
+		try {
+			Integer number = null;
+
+			if (StringUtils.isNotBlank(numericalValueFormatted)) {
+				
+				String source = numericalValueFormatted.trim();
+				
+				NumberFormat format = NumberFormat.getInstance(clientApplicationLocale);
+				DecimalFormat df = (DecimalFormat) format;
+				DecimalFormatSymbols symbols = df.getDecimalFormatSymbols();
+				df.setParseBigDecimal(true);
+				
+				// http://bugs.sun.com/view_bug.do?bug_id=4510618
+				char groupingSeparator = symbols.getGroupingSeparator();
+				if (groupingSeparator == '\u00a0') {
+					source = source.replaceAll(" ", Character.toString('\u00a0'));
+			    }
+				
+				Number parsedNumber = df.parse(source);
+				
+				double parsedNumberDouble = parsedNumber.doubleValue();
+				int parsedNumberInteger = parsedNumber.intValue();
+				
+				if (source.contains(Character.toString(symbols.getDecimalSeparator()))) {
+					throw new ParseException(source, 0);
+				}
+				
+				if (!Double.valueOf(parsedNumberDouble).equals(Double.valueOf(Integer.valueOf(parsedNumberInteger)))) {
+					throw new ParseException(source, 0);
+				}
+				
+				number = parsedNumber.intValue();
+			}
+
+			return number;
+		} catch (ParseException e) {
+
+			List<ApiParameterError> dataValidationErrors = new ArrayList<ApiParameterError>();
+			ApiParameterError error = ApiParameterError.parameterError(
+					"validation.msg.invalid.integer.format", "The parameter "
+							+ parameterName + " has value: " + numericalValueFormatted + " which is invalid integer value for provided locale of ["
+							+ clientApplicationLocale.toString() + "].",
+					parameterName, numericalValueFormatted,
+					clientApplicationLocale);
+			dataValidationErrors.add(error);
+
+			throw new PlatformApiDataValidationException(
+					"validation.msg.validation.errors.exist",
+					"Validation errors exist.", dataValidationErrors);
+		}
+	}
+
+	private Locale localeFromString(final String localeAsString) {
+		
+		if (StringUtils.isBlank(localeAsString)) {
+			List<ApiParameterError> dataValidationErrors = new ArrayList<ApiParameterError>();
+			ApiParameterError error = ApiParameterError.parameterError("validation.msg.invalid.locale.format", "The parameter locale is invalid. It cannot be blank.", "locale");
+			dataValidationErrors.add(error);
+
+			throw new PlatformApiDataValidationException(
+					"validation.msg.validation.errors.exist",
+					"Validation errors exist.", dataValidationErrors);
+		}
+		
+		String languageCode = "";
+		String courntryCode = "";
+		String variantCode = "";
+		
+		String[] localeParts = localeAsString.split("_");
+		
+		if (localeParts != null && localeParts.length == 1) {
+			languageCode = localeParts[0];
+		}
+		
+		if (localeParts != null && localeParts.length == 2) {
+			languageCode = localeParts[0];
+			courntryCode = localeParts[1];
+		}
+		
+		if (localeParts != null && localeParts.length == 3) {
+			languageCode = localeParts[0];
+			courntryCode = localeParts[1];
+			variantCode = localeParts[2];
+		}
+		
+		return localeFrom(languageCode, courntryCode, variantCode);
+	}
+
+	private Locale localeFrom(final String languageCode, final String courntryCode, final String variantCode) {
+		
+		List<ApiParameterError> dataValidationErrors = new ArrayList<ApiParameterError>();
+		
+		List<String> allowedLanguages = Arrays.asList(Locale.getISOLanguages());
+		if (!allowedLanguages.contains(languageCode.toLowerCase())) {
+			ApiParameterError error = ApiParameterError.parameterError("validation.msg.invalid.locale.format", "The parameter locale has an invalid language value " + languageCode + " .", "locale", languageCode);
+			dataValidationErrors.add(error);			
+		}
+		
+		if (StringUtils.isNotBlank(courntryCode.toUpperCase())) {
+			List<String> allowedCountries = Arrays.asList(Locale.getISOCountries());
+			if (!allowedCountries.contains(courntryCode)) {
+				ApiParameterError error = ApiParameterError.parameterError("validation.msg.invalid.locale.format", "The parameter locale has an invalid country value " + courntryCode + " .", "locale", courntryCode);
+				dataValidationErrors.add(error);			
+			}
+		}
+		
+		if (!dataValidationErrors.isEmpty()) {
+			throw new PlatformApiDataValidationException(
+					"validation.msg.validation.errors.exist",
+					"Validation errors exist.", dataValidationErrors);
+		}
+		
+		return new Locale(languageCode.toLowerCase(), courntryCode.toUpperCase(), variantCode);
+	}
+	
+	private Locale extractLocaleValue(final JsonObject object) {
+		Locale clientApplicationLocale = null;
+	    String locale = null;
+		if (object.has("locale") && object.get("locale").isJsonPrimitive()) {
+			JsonPrimitive primitive = object.get("locale").getAsJsonPrimitive();
+			locale = primitive.getAsString();
+			clientApplicationLocale = localeFromString(locale);
+		}
+		return clientApplicationLocale;
+	}
+}

mifosng-provider/src/main/java/org/mifosng/platform/loan/domain/Loan.java

@@ -27,10 +27,9 @@ import org.hibernate.annotations.LazyCollection;
 import org.hibernate.annotations.LazyCollectionOption;
 import org.joda.time.DateTime;
 import org.joda.time.LocalDate;
+import org.mifosng.platform.api.NewLoanScheduleData;
 import org.mifosng.platform.api.commands.LoanApplicationCommand;
-import org.mifosng.platform.api.data.LoanSchedule;
-import org.mifosng.platform.api.data.MoneyData;
-import org.mifosng.platform.api.data.ScheduledLoanInstallment;
+import org.mifosng.platform.api.data.LoanSchedulePeriodData;
 import org.mifosng.platform.client.domain.Client;
 import org.mifosng.platform.currency.domain.MonetaryCurrency;
 import org.mifosng.platform.currency.domain.Money;
@@ -244,7 +243,7 @@ public class Loan extends AbstractAuditableCustom<AppUser, Long> {
 	}
 	
 	public void modifyLoanApplication(final LoanApplicationCommand command, final Client client, final LoanProduct loanProduct, 
-			final Fund fund, final LoanTransactionProcessingStrategy strategy, final LoanSchedule modifiedLoanSchedule, final Set<LoanCharge> charges,
+			final Fund fund, final LoanTransactionProcessingStrategy strategy, final NewLoanScheduleData modifiedLoanSchedule, final Set<LoanCharge> charges,
 			final Staff loanOfficer) {
 
 		if (command.isClientChanged()) {
@@ -310,16 +309,16 @@ public class Loan extends AbstractAuditableCustom<AppUser, Long> {
 		// FIXME - rewrite over loan schedule by default for now but worth putting in check to see if required
 		// i.e. only a client change wouldn't require it, only if one of parameters related to loan schedule calculation is changed.
 		this.repaymentScheduleInstallments.clear();
-		for (ScheduledLoanInstallment scheduledLoanInstallment : modifiedLoanSchedule.getScheduledLoanInstallments()) {
-
-			MoneyData readPrincipalDue = scheduledLoanInstallment.getPrincipalDue();
-			MoneyData readInterestDue = scheduledLoanInstallment.getInterestDue();
-
-			LoanRepaymentScheduleInstallment installment = new LoanRepaymentScheduleInstallment(
-					this, scheduledLoanInstallment.getInstallmentNumber(),
-					scheduledLoanInstallment.getPeriodEnd(), readPrincipalDue.getAmount(),
-					readInterestDue.getAmount());
-			this.addRepaymentScheduleInstallment(installment);
+		for (LoanSchedulePeriodData scheduledLoanInstallment : modifiedLoanSchedule.getPeriods()) {
+			
+			if (scheduledLoanInstallment.isRepaymentPeriod()) {
+				LoanRepaymentScheduleInstallment installment = new LoanRepaymentScheduleInstallment(
+						this, scheduledLoanInstallment.periodNumber(),
+						scheduledLoanInstallment.periodDueDate(), 
+						scheduledLoanInstallment.principalDue(),
+						scheduledLoanInstallment.interestDue());
+				this.addRepaymentScheduleInstallment(installment);
+			}
 		}
 		
 		// if the loan application/contract is modified when repayments are already against it - then need to re-process it

mifosng-provider/src/main/java/org/mifosng/platform/loan/service/CalculationPlatformService.java

@@ -3,12 +3,9 @@ package org.mifosng.platform.loan.service;
 import org.joda.time.LocalDate;
 import org.mifosng.platform.api.NewLoanScheduleData;
 import org.mifosng.platform.api.commands.CalculateLoanScheduleCommand;
-import org.mifosng.platform.api.data.LoanSchedule;
 
 public interface CalculationPlatformService {
 
-	LoanSchedule calculateLoanSchedule(CalculateLoanScheduleCommand command);
-
 	NewLoanScheduleData calculateLoanScheduleNew(CalculateLoanScheduleCommand command);
 	
 	/**

mifosng-provider/src/main/java/org/mifosng/platform/loan/service/CalculationPlatformServiceImpl.java

@@ -1,30 +1,20 @@
 package org.mifosng.platform.loan.service;
 
-import java.math.BigDecimal;
-
 import org.joda.time.LocalDate;
 import org.mifosng.platform.api.NewLoanScheduleData;
 import org.mifosng.platform.api.commands.CalculateLoanScheduleCommand;
 import org.mifosng.platform.api.data.CurrencyData;
-import org.mifosng.platform.api.data.LoanSchedule;
 import org.mifosng.platform.api.data.MoneyData;
 import org.mifosng.platform.currency.domain.ApplicationCurrency;
 import org.mifosng.platform.currency.domain.ApplicationCurrencyRepository;
-import org.mifosng.platform.currency.domain.MonetaryCurrency;
 import org.mifosng.platform.exceptions.CurrencyNotFoundException;
 import org.mifosng.platform.exceptions.LoanNotFoundException;
-import org.mifosng.platform.exceptions.LoanProductNotFoundException;
-import org.mifosng.platform.loan.domain.AmortizationMethod;
-import org.mifosng.platform.loan.domain.InterestCalculationPeriodMethod;
 import org.mifosng.platform.loan.domain.InterestMethod;
 import org.mifosng.platform.loan.domain.Loan;
 import org.mifosng.platform.loan.domain.LoanPayoffSummary;
-import org.mifosng.platform.loan.domain.LoanProduct;
 import org.mifosng.platform.loan.domain.LoanProductRelatedDetail;
-import org.mifosng.platform.loan.domain.LoanProductRepository;
 import org.mifosng.platform.loan.domain.LoanRepository;
 import org.mifosng.platform.loan.domain.PeriodFrequencyType;
-import org.mifosng.platform.loanschedule.domain.AprCalculator;
 import org.mifosng.platform.loanschedule.domain.DefaultLoanScheduleGeneratorFactory;
 import org.mifosng.platform.loanschedule.domain.LoanScheduleGenerator;
 import org.mifosng.platform.loanschedule.domain.LoanScheduleGeneratorFactory;
@@ -37,9 +27,7 @@ public class CalculationPlatformServiceImpl implements CalculationPlatformServic
 
 	private final LoanScheduleGeneratorFactory loanScheduleFactory;
 	private final LoanRepository loanRepository;
-	private final LoanProductRepository loanProductRepository;
 	private final ApplicationCurrencyRepository applicationCurrencyRepository;
-	private final AprCalculator aprCalculator;
 	private final PlatformSecurityContext context;
 	private final LoanProductRelatedDetailAssembler loanProductRelatedDetailAssembler;
 	
@@ -47,15 +35,11 @@ public class CalculationPlatformServiceImpl implements CalculationPlatformServic
 	public CalculationPlatformServiceImpl(
 			final PlatformSecurityContext context,
 			final LoanRepository loanRepository, 
-			final LoanProductRepository loanProductRepository,
 			final ApplicationCurrencyRepository applicationCurrencyRepository, 
-			final AprCalculator aprCalculator,
 			final LoanProductRelatedDetailAssembler loanProductRelatedDetailAssembler) {
 		this.context = context;
 		this.loanRepository = loanRepository;
-		this.loanProductRepository = loanProductRepository;
 		this.applicationCurrencyRepository = applicationCurrencyRepository;
-		this.aprCalculator = aprCalculator;
 		this.loanScheduleFactory = new DefaultLoanScheduleGeneratorFactory();
 		this.loanProductRelatedDetailAssembler = loanProductRelatedDetailAssembler;
 	}
@@ -70,76 +54,19 @@ public class CalculationPlatformServiceImpl implements CalculationPlatformServic
 		
 		LoanProductRelatedDetail loanScheduleRelatedDetails = this.loanProductRelatedDetailAssembler.assembleFrom(command);
 		
-//		final Integer loanTermFrequency = command.getLoanTermFrequency();
-//		final PeriodFrequencyType loanTermFrequencyType = PeriodFrequencyType.fromInt(command.getLoanTermFrequencyType());
-		final InterestMethod interestMethod = InterestMethod.fromInt(command.getInterestType());
-		
-		LoanScheduleGenerator loanScheduleGenerator = this.loanScheduleFactory.create(interestMethod);
-
-//		ApplicationCurrency applicationCurrency = this.applicationCurrencyRepository.findOneByCode(loanScheduleRelatedDetails.getCurrency().getCode());
-		
-//		CurrencyData currencyData = new CurrencyData(
-//				applicationCurrency.getCode(), 
-//				applicationCurrency.getName(), 
-//				loanScheduleRelatedDetails.getCurrency().getDigitsAfterDecimal(),
-//				applicationCurrency.getDisplaySymbol(), 
-//				applicationCurrency.getNameCode());
-		
-		return loanScheduleGenerator.generate(loanScheduleRelatedDetails, 
-												command.getExpectedDisbursementDate(), 
-												command.getRepaymentsStartingFromDate(), 
-												command.getInterestChargedFromDate());
-	}
-
-	@Override
-	public LoanSchedule calculateLoanSchedule(final CalculateLoanScheduleCommand command) {
-		
-		context.authenticatedUser();
-		
-		CalculateLoanScheduleCommandValidator validator = new CalculateLoanScheduleCommandValidator(command);
-		validator.validate();
-		
-		final BigDecimal principalAmount = command.getPrincipal();
-		final BigDecimal defaultNominalInterestRatePerPeriod = command.getInterestRatePerPeriod();
-		final PeriodFrequencyType interestPeriodFrequencyType = PeriodFrequencyType.fromInt(command.getInterestRateFrequencyType());
-		final InterestMethod interestMethod = InterestMethod.fromInt(command.getInterestType());
-		final InterestCalculationPeriodMethod interestCalculationPeriodMethod = InterestCalculationPeriodMethod.fromInt(command.getInterestCalculationPeriodType());
-		
 		final Integer loanTermFrequency = command.getLoanTermFrequency();
 		final PeriodFrequencyType loanTermFrequencyType = PeriodFrequencyType.fromInt(command.getLoanTermFrequencyType());
-		
-		final Integer defaultNumberOfInstallments = command.getNumberOfRepayments();
-		final Integer repayEvery = command.getRepaymentEvery();
-		final PeriodFrequencyType repaymentFrequencyType = PeriodFrequencyType.fromInt(command.getRepaymentFrequencyType());
-		
-		final AmortizationMethod amortizationMethod = AmortizationMethod.fromInt(command.getAmortizationType());
-		
-		final BigDecimal defaultAnnualNominalInterestRate = this.aprCalculator.calculateFrom(interestPeriodFrequencyType, defaultNominalInterestRatePerPeriod);
-		
-		LoanProduct loanProduct = this.loanProductRepository.findOne(command.getProductId());
-		if (loanProduct == null) {
-			throw new LoanProductNotFoundException(command.getProductId());
-		}
-		
-		final MonetaryCurrency currency = loanProduct.getCurrency();
-		
-		// in arrerars tolerance isnt relevant when auto-calculating a loan schedule 
-		final BigDecimal inArrearsTolerance = BigDecimal.ZERO;
-				
-		LoanProductRelatedDetail loanScheduleInfo = new LoanProductRelatedDetail(currency, principalAmount,
-				defaultNominalInterestRatePerPeriod, interestPeriodFrequencyType, defaultAnnualNominalInterestRate, 
-				interestMethod, interestCalculationPeriodMethod,
-				repayEvery, repaymentFrequencyType, defaultNumberOfInstallments, amortizationMethod, 
-				inArrearsTolerance);
+		final InterestMethod interestMethod = InterestMethod.fromInt(command.getInterestType());
 		
 		LoanScheduleGenerator loanScheduleGenerator = this.loanScheduleFactory.create(interestMethod);
 
-		ApplicationCurrency applicationCurrency = this.applicationCurrencyRepository.findOneByCode(currency.getCode());
-		CurrencyData currencyData = new CurrencyData(applicationCurrency.getCode(), applicationCurrency.getName(), currency.getDigitsAfterDecimal(),
-				applicationCurrency.getDisplaySymbol(), applicationCurrency.getNameCode());
+		ApplicationCurrency applicationCurrency = this.applicationCurrencyRepository.findOneByCode(loanScheduleRelatedDetails.getCurrency().getCode());
 		
-		return loanScheduleGenerator.generate(loanScheduleInfo, loanTermFrequency, loanTermFrequencyType, command.getExpectedDisbursementDate(), command.getRepaymentsStartingFromDate(), 
-				command.getInterestChargedFromDate(), currencyData);
+		return loanScheduleGenerator.generate(applicationCurrency,
+				loanScheduleRelatedDetails, loanTermFrequency,
+				loanTermFrequencyType, command.getExpectedDisbursementDate(),
+				command.getRepaymentsStartingFromDate(),
+				command.getInterestChargedFromDate());
 	}
 
 	@Override

mifosng-provider/src/main/java/org/mifosng/platform/loan/service/LoanAssembler.java

@@ -1,16 +1,15 @@
 package org.mifosng.platform.loan.service;
 
 import java.math.BigDecimal;
-import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 
+import org.mifosng.platform.api.NewLoanScheduleData;
 import org.mifosng.platform.api.commands.LoanApplicationCommand;
 import org.mifosng.platform.api.commands.LoanChargeCommand;
-import org.mifosng.platform.api.data.MoneyData;
-import org.mifosng.platform.api.data.ScheduledLoanInstallment;
+import org.mifosng.platform.api.data.LoanSchedulePeriodData;
 import org.mifosng.platform.charge.domain.Charge;
 import org.mifosng.platform.charge.domain.ChargeRepository;
 import org.mifosng.platform.client.domain.Client;
@@ -59,6 +58,7 @@ public class LoanAssembler {
     private final ChargeRepository chargeRepository;
 	private final LoanTransactionProcessingStrategyRepository loanTransactionProcessingStrategyRepository;
 	private final StaffRepository staffRepository;
+	private final CalculationPlatformService calculationPlatformService;
 	
 	@Autowired
 	public LoanAssembler(
@@ -67,13 +67,15 @@ public class LoanAssembler {
 			final FundRepository fundRepository,
             final ChargeRepository chargeRepository,
 			final LoanTransactionProcessingStrategyRepository loanTransactionProcessingStrategyRepository,
-	  		final StaffRepository staffRepository) {
+	  		final StaffRepository staffRepository,
+	  		final CalculationPlatformService calculationPlatformService) {
 		this.loanProductRepository = loanProductRepository;
 		this.clientRepository = clientRepository;
 		this.fundRepository = fundRepository;
         this.chargeRepository = chargeRepository;
 		this.loanTransactionProcessingStrategyRepository = loanTransactionProcessingStrategyRepository;
 		this.staffRepository = staffRepository;
+		this.calculationPlatformService = calculationPlatformService;
 	}
 	
 	public Loan assembleFrom(final LoanApplicationCommand command) {
@@ -107,21 +109,17 @@ public class LoanAssembler {
 		Loan loan = Loan.createNew(fund,loanOfficer, loanTransactionProcessingStrategy, loanProduct, client, loanRepaymentScheduleDetail, loanCharges);
 		loan.setExternalId(command.getExternalId());
 
-        // TODO - user service to calculate loan schedule at this point
-//        LoanSchedule loanSchedule = command.getLoanSchedule();
-		List<ScheduledLoanInstallment> loanRepaymentSchedule = new ArrayList<ScheduledLoanInstallment>();
-//				loanSchedule.getScheduledLoanInstallments();
+		final NewLoanScheduleData loanSchedule = this.calculationPlatformService.calculateLoanScheduleNew(command.toCalculateLoanScheduleCommand());
 		
-		for (ScheduledLoanInstallment scheduledLoanInstallment : loanRepaymentSchedule) {
-
-			MoneyData readPrincipalDue = scheduledLoanInstallment.getPrincipalDue();
-			MoneyData readInterestDue = scheduledLoanInstallment.getInterestDue();
-
-			LoanRepaymentScheduleInstallment installment = new LoanRepaymentScheduleInstallment(
-					loan, scheduledLoanInstallment.getInstallmentNumber(),
-					scheduledLoanInstallment.getPeriodEnd(), readPrincipalDue.getAmount(),
-					readInterestDue.getAmount());
-			loan.addRepaymentScheduleInstallment(installment);
+		for (LoanSchedulePeriodData scheduledLoanInstallment : loanSchedule.getPeriods()) {
+			if (scheduledLoanInstallment.isRepaymentPeriod()) {
+				LoanRepaymentScheduleInstallment installment = new LoanRepaymentScheduleInstallment(
+						loan, scheduledLoanInstallment.periodNumber(),
+						scheduledLoanInstallment.periodDueDate(), 
+						scheduledLoanInstallment.principalDue(),
+						scheduledLoanInstallment.interestDue());
+				loan.addRepaymentScheduleInstallment(installment);
+			}
 		}
 
 		loan.submitApplication(loanTermFrequency, loanTermFrequencyType, 

mifosng-provider/src/main/java/org/mifosng/platform/loan/service/LoanWritePlatformServiceJpaRepositoryImpl.java

@@ -8,6 +8,7 @@ import java.util.Set;
 
 import org.apache.commons.lang.StringUtils;
 import org.joda.time.LocalDate;
+import org.mifosng.platform.api.NewLoanScheduleData;
 import org.mifosng.platform.api.commands.AdjustLoanTransactionCommand;
 import org.mifosng.platform.api.commands.CalculateLoanScheduleCommand;
 import org.mifosng.platform.api.commands.LoanApplicationCommand;
@@ -15,13 +16,11 @@ import org.mifosng.platform.api.commands.LoanStateTransitionCommand;
 import org.mifosng.platform.api.commands.LoanTransactionCommand;
 import org.mifosng.platform.api.commands.UndoStateTransitionCommand;
 import org.mifosng.platform.api.data.EntityIdentifier;
-import org.mifosng.platform.api.data.LoanSchedule;
-import org.mifosng.platform.api.data.ScheduledLoanInstallment;
+import org.mifosng.platform.api.data.LoanSchedulePeriodData;
 import org.mifosng.platform.client.domain.Client;
 import org.mifosng.platform.client.domain.ClientRepository;
 import org.mifosng.platform.client.domain.Note;
 import org.mifosng.platform.client.domain.NoteRepository;
-import org.mifosng.platform.currency.domain.MonetaryCurrency;
 import org.mifosng.platform.currency.domain.Money;
 import org.mifosng.platform.exceptions.ClientNotFoundException;
 import org.mifosng.platform.exceptions.LoanNotFoundException;
@@ -147,7 +146,7 @@ public class LoanWritePlatformServiceJpaRepositoryImpl implements LoanWritePlatf
 		LoanTransactionProcessingStrategy strategy = this.loanAssembler.findStrategyByIdIfProvided(command.getTransactionProcessingStrategyId());
         Set<LoanCharge> charges = this.loanAssembler.assembleSetOfLoanCharges(command.getCharges(), loanProduct.getCharges(), loan.getCurrency().getCode());
 
-		LoanSchedule loanSchedule = this.calculationPlatformService.calculateLoanSchedule(command.toCalculateLoanScheduleCommand());
+        final NewLoanScheduleData loanSchedule = this.calculationPlatformService.calculateLoanScheduleNew(command.toCalculateLoanScheduleCommand());
 		loan.modifyLoanApplication(command, client, loanProduct, fund, strategy, loanSchedule, charges, loanOfficer);
 
 		this.loanRepository.save(loan);
@@ -332,7 +331,7 @@ public class LoanWritePlatformServiceJpaRepositoryImpl implements LoanWritePlatf
 			Integer selectedRepaymentFrequency = loan.repaymentScheduleDetail().getRepaymentPeriodFrequencyType().getValue();
 			Integer selectedAmortizationMethod = loan.repaymentScheduleDetail().getAmortizationMethod().getValue();
 			
-			// FIXME - use values from loan table here instead of inferring.
+			// FIXME - KW - use values from loan table here instead of inferring.
 			Integer loanTermFrequency = repaidEvery * numberOfInstallments;
 			Integer loanTermFrequencyType = selectedRepaymentFrequency;
 			
@@ -351,29 +350,20 @@ public class LoanWritePlatformServiceJpaRepositoryImpl implements LoanWritePlatf
 					loanTermFrequency, loanTermFrequencyType,
 					actualDisbursementDate, repaymentsStartingFromDate, interestCalculatedFromDate);
 
-			LoanSchedule loanSchedule = this.calculationPlatformService.calculateLoanSchedule(calculateCommand);
+			NewLoanScheduleData loanSchedule = this.calculationPlatformService.calculateLoanScheduleNew(calculateCommand);
 
 			List<LoanRepaymentScheduleInstallment> modifiedLoanRepaymentSchedule = new ArrayList<LoanRepaymentScheduleInstallment>();
 			
-			for (ScheduledLoanInstallment scheduledLoanInstallment : loanSchedule
-					.getScheduledLoanInstallments()) {
-				
-				final MonetaryCurrency monetaryCurrency = new MonetaryCurrency(
-										scheduledLoanInstallment.getPrincipalDue().getCurrencyCode(), 
-										scheduledLoanInstallment.getPrincipalDue().getDigitsAfterDecimal());
-
-				Money principal = Money.of(monetaryCurrency,
-						scheduledLoanInstallment.getPrincipalDue().getAmount());
-
-				Money interest = Money.of(monetaryCurrency,
-						scheduledLoanInstallment.getInterestDue().getAmount());
-
-				LoanRepaymentScheduleInstallment installment = new LoanRepaymentScheduleInstallment(
-						loan, scheduledLoanInstallment.getInstallmentNumber(),
-//						scheduledLoanInstallment.getPeriodStart(),
-						scheduledLoanInstallment.getPeriodEnd(), principal.getAmount(),
-						interest.getAmount());
-				modifiedLoanRepaymentSchedule.add(installment);
+			for (LoanSchedulePeriodData scheduledLoanPeriod : loanSchedule.getPeriods()) {
+				if (scheduledLoanPeriod.isRepaymentPeriod()) {
+					LoanRepaymentScheduleInstallment installment = new LoanRepaymentScheduleInstallment(
+							loan, scheduledLoanPeriod.periodNumber(),
+							scheduledLoanPeriod.periodDueDate(), 
+							scheduledLoanPeriod.principalDue(),
+							scheduledLoanPeriod.interestDue());
+					
+					modifiedLoanRepaymentSchedule.add(installment);
+				}
 			}
 			loan.disburseWithModifiedRepaymentSchedule(actualDisbursementDate, modifiedLoanRepaymentSchedule, defaultLoanLifecycleStateMachine());
 		} else {
@@ -402,7 +392,7 @@ public class LoanWritePlatformServiceJpaRepositoryImpl implements LoanWritePlatf
 		}
 
 		if (loan.isActualDisbursedOnDateEarlierOrLaterThanExpected()) {
-			// FIXME - handle this use case - recalculate loan schedule using original settings.
+			// FIXME - KW - handle this use case - recalculate loan schedule using original settings.
 		}
 
 		loan.undoDisbursal(defaultLoanLifecycleStateMachine());

mifosng-provider/src/main/java/org/mifosng/platform/loanschedule/domain/AmortizationLoanScheduleGenerator.java

@@ -7,17 +7,23 @@ import org.joda.time.LocalDate;
 import org.mifosng.platform.api.NewLoanScheduleData;
 import org.mifosng.platform.api.data.CurrencyData;
 import org.mifosng.platform.api.data.LoanSchedule;
+import org.mifosng.platform.currency.domain.ApplicationCurrency;
 import org.mifosng.platform.loan.domain.LoanProductRelatedDetail;
 
 public interface AmortizationLoanScheduleGenerator {
 
-	LoanSchedule generate(LoanProductRelatedDetail loanScheduleInfo, LocalDate disbursementDate, 
-			LocalDate firstRepaymentDate, LocalDate interestCalculatedFrom, CurrencyData currencyData,
-			BigDecimal periodInterestRateForRepaymentPeriod, 
-			LocalDate idealDisbursementDateBasedOnFirstRepaymentDate, 
-			List<LocalDate> scheduledDates);
+	@Deprecated
+	LoanSchedule generate(final LoanProductRelatedDetail loanScheduleInfo, 
+			final LocalDate disbursementDate, 
+			final LocalDate firstRepaymentDate,
+			final LocalDate interestCalculatedFrom,
+			final CurrencyData currencyData,
+			final BigDecimal periodInterestRateForRepaymentPeriod, 
+			final LocalDate idealDisbursementDateBasedOnFirstRepaymentDate,
+			final List<LocalDate> scheduledDates);
 
 	NewLoanScheduleData generate(
+			ApplicationCurrency applicationCurrency, 
 			LoanProductRelatedDetail loanScheduleInfo,
 			LocalDate disbursementDate, 
 			LocalDate firstRepaymentDate,
@@ -25,5 +31,4 @@ public interface AmortizationLoanScheduleGenerator {
 			BigDecimal periodInterestRateForRepaymentPeriod,
 			LocalDate idealDisbursementDateBasedOnFirstRepaymentDate,
 			List<LocalDate> scheduledDates);
-
-}
+}

mifosng-provider/src/main/java/org/mifosng/platform/loanschedule/domain/DecliningBalanceMethodLoanScheduleGenerator.java

@@ -7,6 +7,7 @@ import org.joda.time.LocalDate;
 import org.mifosng.platform.api.NewLoanScheduleData;
 import org.mifosng.platform.api.data.CurrencyData;
 import org.mifosng.platform.api.data.LoanSchedule;
+import org.mifosng.platform.currency.domain.ApplicationCurrency;
 import org.mifosng.platform.loan.domain.AmortizationMethod;
 import org.mifosng.platform.loan.domain.LoanProductRelatedDetail;
 import org.mifosng.platform.loan.domain.PeriodFrequencyType;
@@ -36,7 +37,10 @@ public class DecliningBalanceMethodLoanScheduleGenerator implements LoanSchedule
 	
 	@Override
 	public NewLoanScheduleData generate(
-			final LoanProductRelatedDetail loanScheduleInfo, 
+			final ApplicationCurrency applicationCurrency,
+			final LoanProductRelatedDetail loanScheduleInfo,
+			final Integer loanTermFrequency, 
+			final PeriodFrequencyType loanTermFrequencyType, 
 			final LocalDate disbursementDate, 
 			final LocalDate firstRepaymentDate,
 			final LocalDate interestCalculatedFrom) {
@@ -52,7 +56,7 @@ public class DecliningBalanceMethodLoanScheduleGenerator implements LoanSchedule
 		// Determine with 'amortisation' approach to use
 		final AmortizationLoanScheduleGenerator generator = this.amortizationLoanScheduleGeneratorFactory.createGenerator(loanScheduleInfo.getAmortizationMethod());
 		
-		return generator.generate(
+		return generator.generate(applicationCurrency,
 				loanScheduleInfo, 
 				disbursementDate, 
 				firstRepaymentDate,
@@ -62,6 +66,7 @@ public class DecliningBalanceMethodLoanScheduleGenerator implements LoanSchedule
 				scheduledDates);
 	}
 	
+	@Deprecated
 	@Override
 	public LoanSchedule generate(
 			final LoanProductRelatedDetail loanScheduleInfo,

mifosng-provider/src/main/java/org/mifosng/platform/loanschedule/domain/EqualInstallmentsAmortizationLoanScheduleGenerator.java

@@ -13,6 +13,7 @@ import org.mifosng.platform.api.data.LoanSchedule;
 import org.mifosng.platform.api.data.LoanSchedulePeriodData;
 import org.mifosng.platform.api.data.MoneyData;
 import org.mifosng.platform.api.data.ScheduledLoanInstallment;
+import org.mifosng.platform.currency.domain.ApplicationCurrency;
 import org.mifosng.platform.currency.domain.MonetaryCurrency;
 import org.mifosng.platform.currency.domain.Money;
 import org.mifosng.platform.loan.domain.LoanProductRelatedDetail;
@@ -28,6 +29,7 @@ public class EqualInstallmentsAmortizationLoanScheduleGenerator implements Amort
 	
 	@Override
 	public NewLoanScheduleData generate(
+			final ApplicationCurrency currency,
 			final LoanProductRelatedDetail loanScheduleInfo, 
 			final LocalDate disbursementDate, 
 			final LocalDate firstRepaymentDate,
@@ -36,10 +38,7 @@ public class EqualInstallmentsAmortizationLoanScheduleGenerator implements Amort
 			final LocalDate idealDisbursementDateBasedOnFirstRepaymentDate,
 			final List<LocalDate> scheduledDates) {
 		
-		// 1. add disbursements to loan schedule
-		
-		// 2.
-		Collection<LoanSchedulePeriodData> periods = new ArrayList<LoanSchedulePeriodData>();
+		final Collection<LoanSchedulePeriodData> periods = new ArrayList<LoanSchedulePeriodData>();
 		
 		// determine 'total payment' for each repayment based on pmt function (and hence the total due overall)
 		final MonetaryCurrency monetaryCurrency = loanScheduleInfo.getPrincipal().getCurrency();
@@ -58,11 +57,17 @@ public class EqualInstallmentsAmortizationLoanScheduleGenerator implements Amort
 				scheduledDates, 
 				idealDisbursementDateBasedOnFirstRepaymentDate);
 		
-		
 		// create entries of disbursement period on loan schedule
 		final LoanSchedulePeriodData disbursementPeriod = LoanSchedulePeriodData.disbursement(disbursementDate, loanScheduleInfo.getPrincipal().getAmount());
 		periods.add(disbursementPeriod);
 		
+		int loanTermInDays = Integer.valueOf(0);
+		BigDecimal cumulativePrincipalDisbursed = loanScheduleInfo.getPrincipal().getAmount();
+		BigDecimal cumulativePrincipalDue = BigDecimal.ZERO;
+		BigDecimal cumulativeInterestExpected = BigDecimal.ZERO;
+		BigDecimal cumulativeChargesToDate = BigDecimal.ZERO;
+		BigDecimal totalExpectedRepayment = BigDecimal.ZERO;
+		
 		LocalDate startDate = disbursementDate;
 		int periodNumber = 1;
 		for (LocalDate scheduledDueDate : scheduledDates) {
@@ -115,15 +120,31 @@ public class EqualInstallmentsAmortizationLoanScheduleGenerator implements Amort
 					interestForInstallment.getAmount(), totalInstallmentDue.getAmount());
 
 			periods.add(installment);
-
+			
+			// handle cumulative fields
+			loanTermInDays += daysInPeriod;
+			cumulativePrincipalDue = cumulativePrincipalDue.add(principalForInstallment.getAmount());
+			cumulativeInterestExpected = cumulativeInterestExpected.add(interestForInstallment.getAmount());
+			totalExpectedRepayment = totalExpectedRepayment.add(totalInstallmentDue.getAmount());
 			startDate = scheduledDueDate;
 
 			periodNumber++;
 		}
 		
-		return new NewLoanScheduleData(periods);
+		final BigDecimal cumulativePrincipalOutstanding = cumulativePrincipalDisbursed.subtract(cumulativePrincipalDue);
+		
+		CurrencyData currencyData = new CurrencyData(
+				currency.getCode(), 
+				currency.getName(),
+				monetaryCurrency.getDigitsAfterDecimal(),
+				currency.getDisplaySymbol(),
+				currency.getNameCode());
+		
+		return new NewLoanScheduleData(currencyData, periods, loanTermInDays, cumulativePrincipalDisbursed, cumulativePrincipalDue, 
+				cumulativePrincipalOutstanding, cumulativeInterestExpected, cumulativeChargesToDate, totalExpectedRepayment);
 	}
 	
+	@Deprecated
 	@Override
 	public LoanSchedule generate(final LoanProductRelatedDetail loanScheduleInfo, 
 			final LocalDate disbursementDate, 

mifosng-provider/src/main/java/org/mifosng/platform/loanschedule/domain/EqualPrincipalAmortizationLoanScheduleGenerator.java

@@ -2,6 +2,7 @@ package org.mifosng.platform.loanschedule.domain;
 
 import java.math.BigDecimal;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.List;
 
 import org.joda.time.Days;
@@ -9,8 +10,10 @@ import org.joda.time.LocalDate;
 import org.mifosng.platform.api.NewLoanScheduleData;
 import org.mifosng.platform.api.data.CurrencyData;
 import org.mifosng.platform.api.data.LoanSchedule;
+import org.mifosng.platform.api.data.LoanSchedulePeriodData;
 import org.mifosng.platform.api.data.MoneyData;
 import org.mifosng.platform.api.data.ScheduledLoanInstallment;
+import org.mifosng.platform.currency.domain.ApplicationCurrency;
 import org.mifosng.platform.currency.domain.MonetaryCurrency;
 import org.mifosng.platform.currency.domain.Money;
 import org.mifosng.platform.loan.domain.LoanProductRelatedDetail;
@@ -22,16 +25,106 @@ public class EqualPrincipalAmortizationLoanScheduleGenerator implements Amortiza
 	
 	@Override
 	public NewLoanScheduleData generate(
+			ApplicationCurrency currency,
 			LoanProductRelatedDetail loanScheduleInfo,
 			LocalDate disbursementDate, LocalDate firstRepaymentDate,
 			LocalDate interestCalculatedFrom,
 			BigDecimal periodInterestRateForRepaymentPeriod,
 			LocalDate idealDisbursementDateBasedOnFirstRepaymentDate,
 			List<LocalDate> scheduledDates) {
-		// TODO Auto-generated method stub
-		return null;
+
+		final Collection<LoanSchedulePeriodData> periods = new ArrayList<LoanSchedulePeriodData>();
+		
+		// 1. we know 'principal' must be equal over repayments so use this to calculate interest and thus total repayment due.
+		final MonetaryCurrency monetaryCurrency = loanScheduleInfo.getPrincipal().getCurrency();
+		Money totalDuePerInstallment = Money.zero(monetaryCurrency);
+
+		Money outstandingBalance = loanScheduleInfo.getPrincipal();
+		Money totalPrincipal = Money.zero(monetaryCurrency);
+		Money totalInterest = Money.zero(monetaryCurrency);
+		
+		double interestCalculationGraceOnRepaymentPeriodFraction = this.paymentPeriodsInOneYearCalculator.calculateRepaymentPeriodAsAFractionOfDays(loanScheduleInfo.getRepaymentPeriodFrequencyType(), 
+												loanScheduleInfo.getRepayEvery(), interestCalculatedFrom, scheduledDates, idealDisbursementDateBasedOnFirstRepaymentDate);
+		
+		// create entries of disbursement period on loan schedule
+		final LoanSchedulePeriodData disbursementPeriod = LoanSchedulePeriodData.disbursement(disbursementDate, loanScheduleInfo.getPrincipal().getAmount());
+		periods.add(disbursementPeriod);
+		
+		int loanTermInDays = Integer.valueOf(0);
+		BigDecimal cumulativePrincipalDisbursed = loanScheduleInfo.getPrincipal().getAmount();
+		BigDecimal cumulativePrincipalDue = BigDecimal.ZERO;
+		BigDecimal cumulativeInterestExpected = BigDecimal.ZERO;
+		BigDecimal cumulativeChargesToDate = BigDecimal.ZERO;
+		BigDecimal totalExpectedRepayment = BigDecimal.ZERO;
+		
+		LocalDate startDate = disbursementDate;
+		int periodNumber = 1;
+		for (LocalDate scheduledDueDate : scheduledDates) {
+
+			// number of days from startDate to this scheduledDate
+			int daysInPeriod = Days.daysBetween(startDate.toDateMidnight().toDateTime(), scheduledDueDate.toDateMidnight().toDateTime()).getDays();
+			
+			Money interestForInstallment = this.periodicInterestRateCalculator.calculateInterestOn(outstandingBalance, periodInterestRateForRepaymentPeriod, daysInPeriod, loanScheduleInfo);
+			Money principalForInstallment = this.periodicInterestRateCalculator.calculatePrincipalOn(totalDuePerInstallment, interestForInstallment, loanScheduleInfo);
+			
+			if (interestCalculationGraceOnRepaymentPeriodFraction >= Integer.valueOf(1).doubleValue()) {
+				Money graceOnInterestForRepaymentPeriod = interestForInstallment;
+				interestForInstallment = interestForInstallment.minus(graceOnInterestForRepaymentPeriod);
+				interestCalculationGraceOnRepaymentPeriodFraction = interestCalculationGraceOnRepaymentPeriodFraction - Integer.valueOf(1).doubleValue();
+			} else if (interestCalculationGraceOnRepaymentPeriodFraction > Double.valueOf("0.25") && interestCalculationGraceOnRepaymentPeriodFraction < Integer.valueOf(1).doubleValue()) {
+				Money graceOnInterestForRepaymentPeriod = interestForInstallment.multipliedBy(interestCalculationGraceOnRepaymentPeriodFraction);
+				interestForInstallment = interestForInstallment.minus(graceOnInterestForRepaymentPeriod);
+				interestCalculationGraceOnRepaymentPeriodFraction = Double.valueOf("0");
+			}
+			
+			totalPrincipal = totalPrincipal.plus(principalForInstallment);
+			totalInterest = totalInterest.plus(interestForInstallment);
+			
+			if (periodNumber == loanScheduleInfo.getNumberOfRepayments()) {
+				Money principalDifference = totalPrincipal.minus(loanScheduleInfo.getPrincipal());
+				if (principalDifference.isLessThanZero()) {
+					principalForInstallment = principalForInstallment.plus(principalDifference.abs());
+				} else if (principalDifference.isGreaterThanZero()) {
+					principalForInstallment = principalForInstallment.minus(principalDifference.abs());
+				}
+			}
+
+			Money totalInstallmentDue = principalForInstallment.plus(interestForInstallment);
+
+			outstandingBalance = outstandingBalance.minus(principalForInstallment);
+			
+			LoanSchedulePeriodData installment = LoanSchedulePeriodData.repaymentPeriod(periodNumber, startDate, 
+					scheduledDueDate, 
+					principalForInstallment.getAmount(), 
+					outstandingBalance.getAmount(), 
+					interestForInstallment.getAmount(), totalInstallmentDue.getAmount());
+
+			periods.add(installment);
+			
+			// handle cumulative fields
+			loanTermInDays += daysInPeriod;
+			cumulativePrincipalDue = cumulativePrincipalDue.add(principalForInstallment.getAmount());
+			cumulativeInterestExpected = cumulativeInterestExpected.add(interestForInstallment.getAmount());
+			totalExpectedRepayment = totalExpectedRepayment.add(totalInstallmentDue.getAmount());
+			startDate = scheduledDueDate;
+
+			periodNumber++;
+		}
+	
+		final BigDecimal cumulativePrincipalOutstanding = cumulativePrincipalDisbursed.subtract(cumulativePrincipalDue);
+		
+		CurrencyData currencyData = new CurrencyData(
+				currency.getCode(), 
+				currency.getName(),
+				monetaryCurrency.getDigitsAfterDecimal(),
+				currency.getDisplaySymbol(),
+				currency.getNameCode());
+		
+		return new NewLoanScheduleData(currencyData, periods, loanTermInDays, cumulativePrincipalDisbursed, cumulativePrincipalDue, 
+				cumulativePrincipalOutstanding, cumulativeInterestExpected, cumulativeChargesToDate, totalExpectedRepayment);
 	}
 	
+	@Deprecated
 	@Override
 	public LoanSchedule generate(final LoanProductRelatedDetail loanScheduleInfo, 
 			final LocalDate disbursementDate, 

mifosng-provider/src/main/java/org/mifosng/platform/loanschedule/domain/FlatMethodLoanScheduleGenerator.java

@@ -4,14 +4,19 @@ import java.math.BigDecimal;
 import java.math.MathContext;
 import java.math.RoundingMode;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.List;
 
+import org.joda.time.Days;
 import org.joda.time.LocalDate;
 import org.mifosng.platform.api.NewLoanScheduleData;
 import org.mifosng.platform.api.data.CurrencyData;
 import org.mifosng.platform.api.data.LoanSchedule;
+import org.mifosng.platform.api.data.LoanSchedulePeriodData;
 import org.mifosng.platform.api.data.MoneyData;
 import org.mifosng.platform.api.data.ScheduledLoanInstallment;
+import org.mifosng.platform.currency.domain.ApplicationCurrency;
+import org.mifosng.platform.currency.domain.MonetaryCurrency;
 import org.mifosng.platform.currency.domain.Money;
 import org.mifosng.platform.loan.domain.LoanProductRelatedDetail;
 import org.mifosng.platform.loan.domain.PeriodFrequencyType;
@@ -23,10 +28,108 @@ public class FlatMethodLoanScheduleGenerator implements LoanScheduleGenerator {
 	
 	@Override
 	public NewLoanScheduleData generate(
-			LoanProductRelatedDetail loanScheduleInfo,
-			LocalDate disbursementDate, LocalDate firstRepaymentDate,
-			LocalDate interestCalculatedFrom) {
-		return null;
+			final ApplicationCurrency currency,
+			final LoanProductRelatedDetail loanScheduleInfo,
+			final Integer loanTermFrequency, 
+			final PeriodFrequencyType loanTermFrequencyType, 
+			final LocalDate disbursementDate, 
+			final LocalDate firstRepaymentDate,
+			final LocalDate interestCalculatedFrom) {
+		
+		final Collection<LoanSchedulePeriodData> periods = new ArrayList<LoanSchedulePeriodData>();
+		
+		final List<LocalDate> scheduledDates = this.scheduledDateGenerator.generate(loanScheduleInfo, disbursementDate, firstRepaymentDate);
+
+		MathContext mc = new MathContext(8, RoundingMode.HALF_EVEN);
+		
+		BigDecimal loanTermPeriodsInYear = BigDecimal.valueOf(this.paymentPeriodsInOneYearCalculator.calculate(loanTermFrequencyType));
+		BigDecimal interestRateForLoanTerm = loanScheduleInfo
+				.getAnnualNominalInterestRate()
+				.divide(loanTermPeriodsInYear, mc)
+				.divide(BigDecimal.valueOf(Double.valueOf("100.0")), mc)
+				.multiply(BigDecimal.valueOf(loanTermFrequency));
+		
+		final MonetaryCurrency monetaryCurrency = loanScheduleInfo.getPrincipal().getCurrency();
+		Money totalInterestForLoanTerm = loanScheduleInfo.getPrincipal().multiplyRetainScale(interestRateForLoanTerm, RoundingMode.HALF_EVEN);
+
+		Money interestPerInstallment = totalInterestForLoanTerm.dividedBy(Long.valueOf(loanScheduleInfo.getNumberOfRepayments()), RoundingMode.HALF_EVEN);
+		
+		Money principalPerInstallment = loanScheduleInfo.getPrincipal()
+				.dividedBy(loanScheduleInfo.getNumberOfRepayments(),
+						RoundingMode.HALF_EVEN);
+
+		Money outstandingBalance = loanScheduleInfo.getPrincipal();
+		Money totalPrincipal = Money.zero(outstandingBalance.getCurrency());
+		Money totalInterest = Money.zero(outstandingBalance.getCurrency());
+
+		// create entries of disbursement period on loan schedule
+		final LoanSchedulePeriodData disbursementPeriod = LoanSchedulePeriodData.disbursement(disbursementDate, loanScheduleInfo.getPrincipal().getAmount());
+		periods.add(disbursementPeriod);
+		
+		int loanTermInDays = Integer.valueOf(0);
+		BigDecimal cumulativePrincipalDisbursed = loanScheduleInfo.getPrincipal().getAmount();
+		BigDecimal cumulativePrincipalDue = BigDecimal.ZERO;
+		BigDecimal cumulativeInterestExpected = BigDecimal.ZERO;
+		BigDecimal cumulativeChargesToDate = BigDecimal.ZERO;
+		BigDecimal totalExpectedRepayment = BigDecimal.ZERO;
+		
+		LocalDate startDate = disbursementDate;
+		int periodNumber = 1;
+		for (LocalDate scheduledDueDate : scheduledDates) {
+			totalPrincipal = totalPrincipal.plus(principalPerInstallment);
+			totalInterest = totalInterest.plus(interestPerInstallment);
+			
+			// number of days from startDate to this scheduledDate
+			int daysInPeriod = Days.daysBetween(startDate.toDateMidnight().toDateTime(), scheduledDueDate.toDateMidnight().toDateTime()).getDays();
+
+			if (periodNumber == loanScheduleInfo.getNumberOfRepayments()) {
+				final Money difference = totalPrincipal.minus(loanScheduleInfo.getPrincipal());
+				if (difference.isLessThanZero()) {
+					principalPerInstallment = principalPerInstallment.plus(difference.abs());
+				} else if (difference.isGreaterThanZero()) {
+					principalPerInstallment = principalPerInstallment.minus(difference.abs());
+				}
+				
+				final Money interestDifference = totalInterest.minus(totalInterestForLoanTerm);
+				if (interestDifference.isLessThanZero()) {
+					interestPerInstallment = interestPerInstallment.plus(interestDifference.abs());
+				} else if (interestDifference.isGreaterThanZero()) {
+					interestPerInstallment = interestPerInstallment.minus(interestDifference.abs());
+				}
+			}
+
+			Money totalInstallmentDue = principalPerInstallment.plus(interestPerInstallment);
+			outstandingBalance = outstandingBalance.minus(principalPerInstallment);
+			
+			LoanSchedulePeriodData installment = LoanSchedulePeriodData.repaymentPeriod(periodNumber, startDate, 
+					scheduledDueDate, 
+					principalPerInstallment.getAmount(), 
+					outstandingBalance.getAmount(), 
+					interestPerInstallment.getAmount(), totalInstallmentDue.getAmount());
+
+			periods.add(installment);
+			
+			// handle cumulative fields
+			loanTermInDays += daysInPeriod;
+			cumulativePrincipalDue = cumulativePrincipalDue.add(principalPerInstallment.getAmount());
+			cumulativeInterestExpected = cumulativeInterestExpected.add(interestPerInstallment.getAmount());
+			totalExpectedRepayment = totalExpectedRepayment.add(totalInstallmentDue.getAmount());
+			startDate = scheduledDueDate;
+
+			periodNumber++;
+		}
+		
+		final BigDecimal cumulativePrincipalOutstanding = cumulativePrincipalDisbursed.subtract(cumulativePrincipalDue);
+		
+		CurrencyData currencyData = new CurrencyData(
+				currency.getCode(), 
+				currency.getName(),
+				monetaryCurrency.getDigitsAfterDecimal(),
+				currency.getDisplaySymbol(),
+				currency.getNameCode());
+		
+		return new NewLoanScheduleData(currencyData, periods, loanTermInDays, cumulativePrincipalDisbursed, cumulativePrincipalDue, 
+				cumulativePrincipalOutstanding, cumulativeInterestExpected, cumulativeChargesToDate, totalExpectedRepayment);
 	}
 	
 	@Override

mifosng-provider/src/main/java/org/mifosng/platform/loanschedule/domain/LoanScheduleGenerator.java

@@ -4,17 +4,23 @@ import org.joda.time.LocalDate;
 import org.mifosng.platform.api.NewLoanScheduleData;
 import org.mifosng.platform.api.data.CurrencyData;
 import org.mifosng.platform.api.data.LoanSchedule;
+import org.mifosng.platform.currency.domain.ApplicationCurrency;
 import org.mifosng.platform.loan.domain.LoanProductRelatedDetail;
 import org.mifosng.platform.loan.domain.PeriodFrequencyType;
 
 public interface LoanScheduleGenerator {
 
+	@Deprecated
 	LoanSchedule generate(LoanProductRelatedDetail loanScheduleInfo,
 			Integer loanTermFrequency, 
 			PeriodFrequencyType loanTermFrequencyType, 
 			LocalDate disbursementDate, LocalDate firstRepaymentDate, LocalDate interestCalculatedFrom, 
 			CurrencyData currencyData);
 
-	NewLoanScheduleData generate(LoanProductRelatedDetail loanScheduleInfo, LocalDate disbursementDate, LocalDate firstRepaymentDate, LocalDate interestCalculatedFrom);
+	NewLoanScheduleData generate(ApplicationCurrency applicationCurrency, 
+			LoanProductRelatedDetail loanScheduleInfo,
+			Integer loanTermFrequency, 
+			PeriodFrequencyType loanTermFrequencyType, 
+			LocalDate disbursementDate, LocalDate firstRepaymentDate, LocalDate interestCalculatedFrom);
 
 }