from MIFOX-38 - need to tidy up serialization of java objects into json across the board - this is for user admin related areas.

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

@@ -12,7 +12,7 @@ import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.UriInfo;
 
 import org.mifosng.platform.api.data.PermissionData;
-import org.mifosng.platform.api.infrastructure.ApiDataConversionService;
+import org.mifosng.platform.api.infrastructure.ApiJsonSerializerService;
 import org.mifosng.platform.api.infrastructure.ApiParameterHelper;
 import org.mifosng.platform.user.service.PermissionReadPlatformService;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -28,7 +28,7 @@ public class PermissionsApiResource {
 	private PermissionReadPlatformService permissionReadPlatformService;
 
 	@Autowired
-	private ApiDataConversionService apiDataConversionService;
+	private ApiJsonSerializerService apiJsonSerializerService;
 
 	@GET
 	@Consumes({MediaType.APPLICATION_JSON})
@@ -40,6 +40,6 @@ public class PermissionsApiResource {
 		
 		Collection<PermissionData> permissions = this.permissionReadPlatformService.retrieveAllPermissions();
 		
-		return this.apiDataConversionService.convertPermissionDataToJson(prettyPrint, responseParameters, permissions.toArray(new PermissionData[permissions.size()]));
+		return this.apiJsonSerializerService.serializePermissionDataToJson(prettyPrint, responseParameters, permissions);
 	}
 }

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

@@ -1,5 +1,6 @@
 package org.mifosng.platform.api;
 
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.HashSet;
@@ -22,6 +23,7 @@ import org.mifosng.platform.api.data.EntityIdentifier;
 import org.mifosng.platform.api.data.PermissionData;
 import org.mifosng.platform.api.data.RoleData;
 import org.mifosng.platform.api.infrastructure.ApiDataConversionService;
+import org.mifosng.platform.api.infrastructure.ApiJsonSerializerService;
 import org.mifosng.platform.api.infrastructure.ApiParameterHelper;
 import org.mifosng.platform.user.service.PermissionReadPlatformService;
 import org.mifosng.platform.user.service.RoleReadPlatformService;
@@ -46,6 +48,9 @@ public class RolesApiResource {
 
 	@Autowired
 	private ApiDataConversionService apiDataConversionService;
+	
+	@Autowired
+	private ApiJsonSerializerService apiJsonSerializerService;
 
 	@GET
 	@Consumes({MediaType.APPLICATION_JSON})
@@ -62,7 +67,7 @@ public class RolesApiResource {
 
 		Collection<RoleData> roles = this.roleReadPlatformService.retrieveAllRoles();
 		
-		return this.apiDataConversionService.convertRoleDataToJson(prettyPrint, responseParameters, roles.toArray(new RoleData[roles.size()]));
+		return this.apiJsonSerializerService.serializeRoleDataToJson(prettyPrint, responseParameters, roles);
 	}
 
 	@GET
@@ -81,10 +86,9 @@ public class RolesApiResource {
 		
 		Collection<PermissionData> allPermissions = this.permissionReadPlatformService.retrieveAllPermissions();
 
-		RoleData role = new RoleData();
-		role.setAvailablePermissions(allPermissions);
+		RoleData role = new RoleData(allPermissions, new ArrayList<PermissionData>());
 		
-		return this.apiDataConversionService.convertRoleDataToJson(prettyPrint, responseParameters, role);
+		return this.apiJsonSerializerService.serializeRoleDataToJson(prettyPrint, responseParameters, role);
 	}
 
 	@POST
@@ -119,13 +123,13 @@ public class RolesApiResource {
 		if (template) {
 			Collection<PermissionData> availablePermissions = this.permissionReadPlatformService.retrieveAllPermissions();
 			availablePermissions.removeAll(role.getSelectedPermissions());
-			role.setAvailablePermissions(availablePermissions);
+			
+			role = new RoleData(role, availablePermissions);
 			
 			responseParameters.add("availablePermissions");
 			responseParameters.add("selectedPermissions");
 		}
-
-		return this.apiDataConversionService.convertRoleDataToJson(prettyPrint, responseParameters, role);
+		return this.apiJsonSerializerService.serializeRoleDataToJson(prettyPrint, responseParameters, role);
 	}
 
 	@PUT

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

@@ -25,6 +25,7 @@ import org.mifosng.platform.api.data.AppUserData;
 import org.mifosng.platform.api.data.EntityIdentifier;
 import org.mifosng.platform.api.data.OfficeLookup;
 import org.mifosng.platform.api.infrastructure.ApiDataConversionService;
+import org.mifosng.platform.api.infrastructure.ApiJsonSerializerService;
 import org.mifosng.platform.api.infrastructure.ApiParameterHelper;
 import org.mifosng.platform.organisation.service.OfficeReadPlatformService;
 import org.mifosng.platform.security.PlatformSecurityContext;
@@ -52,6 +53,9 @@ public class UsersApiResource {
 	@Autowired
 	private ApiDataConversionService apiDataConversionService;
 	
+	@Autowired
+	private ApiJsonSerializerService apiJsonSerializerService;
+	
 	@Autowired
 	private PlatformSecurityContext context;
 	
@@ -70,7 +74,7 @@ public class UsersApiResource {
 
 		Collection<AppUserData> users = this.appUserReadPlatformService.retrieveAllUsers();
 		
-		return this.apiDataConversionService.convertAppUserDataToJson(prettyPrint, responseParameters, users.toArray(new AppUserData[users.size()]));
+		return this.apiJsonSerializerService.serializeAppUserDataToJson(prettyPrint, responseParameters, users);
 	}
 
 	@GET
@@ -91,13 +95,13 @@ public class UsersApiResource {
 		AppUserData user = this.appUserReadPlatformService.retrieveUser(userId);
 		if (template) {
 			List<OfficeLookup> offices = new ArrayList<OfficeLookup>(this.officeReadPlatformService.retrieveAllOfficesForLookup());
-			user.setAllowedOffices(offices);
+			user = new AppUserData(user, offices);
 			responseParameters.add("allowedOffices");
 			responseParameters.add("availableRoles");
 			responseParameters.add("selectedRoles");
 		}
 		
-		return this.apiDataConversionService.convertAppUserDataToJson(prettyPrint, responseParameters, user);
+		return this.apiJsonSerializerService.serializeAppUserDataToJson(prettyPrint, responseParameters, user);
 	}
 
 	@GET
@@ -117,7 +121,7 @@ public class UsersApiResource {
 		
 		AppUserData user = this.appUserReadPlatformService.retrieveNewUserDetails();
 
-		return this.apiDataConversionService.convertAppUserDataToJson(prettyPrint, responseParameters, user);
+		return this.apiJsonSerializerService.serializeAppUserDataToJson(prettyPrint, responseParameters, user);
 	}
 
 	@POST

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

@@ -3,112 +3,104 @@ package org.mifosng.platform.api.data;
 import java.util.ArrayList;
 import java.util.List;
 
+/**
+ * Immutable data object for application user data.
+ */
 public class AppUserData {
 
-	private Long id;
-	private String username;
-	private Long officeId;
-	private String officeName;
-	private String firstname;
-	private String lastname;
-	private String email;
+	private final Long id;
+	private final String username;
+	private final Long officeId;
+	private final String officeName;
+	private final String firstname;
+	private final String lastname;
+	private final String email;
 
-	private List<OfficeLookup> allowedOffices = new ArrayList<OfficeLookup>();
-
-	private List<RoleData> availableRoles = new ArrayList<RoleData>();
-	private List<RoleData> selectedRoles = new ArrayList<RoleData>();
-
-	public AppUserData() {
-		//
-	}
+	private final List<OfficeLookup> allowedOffices;
+	private final List<RoleData> availableRoles;
+	private final List<RoleData> selectedRoles;
 
 	public AppUserData(final Long id, final String username,
 			final String email, final Long officeId,
-			final String officeName) {
+			final String officeName, final String firstname, final String lastname, final List<RoleData> availableRoles, final List<RoleData> selectedRoles) {
 		this.id = id;
 		this.username = username;
-		this.email = email;
 		this.officeId = officeId;
 		this.officeName = officeName;
+		this.firstname = firstname;
+		this.lastname = lastname;
+		this.email = email;
+		
+		this.allowedOffices = new ArrayList<OfficeLookup>();
+		this.availableRoles = availableRoles;
+		this.selectedRoles = selectedRoles;
+	}
+	
+	public AppUserData(AppUserData user, List<OfficeLookup> allowedOffices) {
+		this.id = user.getId();
+		this.username = user.getUsername();
+		this.officeId = user.getOfficeId();
+		this.officeName = user.getOfficeName();
+		this.firstname = user.getFirstname();
+		this.lastname = user.getLastname();
+		this.email = user.getEmail();
+		
+		this.allowedOffices = allowedOffices;
+		this.availableRoles = user.getAvailableRoles();
+		this.selectedRoles = user.getSelectedRoles();
+	}
+
+	public AppUserData(final List<OfficeLookup> allowedOffices, final List<RoleData> availableRoles) {
+		this.id = null;
+		this.username = null;
+		this.officeId = null;
+		this.officeName = null;
+		this.firstname = null;
+		this.lastname = null;
+		this.email = null;
+		
+		this.allowedOffices = allowedOffices;
+		this.availableRoles = availableRoles;
+		this.selectedRoles = new ArrayList<RoleData>();
 	}
 
 	public Long getId() {
-		return this.id;
+		return id;
 	}
 
 	public String getUsername() {
-		return this.username;
-	}
-
-	public String getEmail() {
-		return this.email;
+		return username;
 	}
 
 	public Long getOfficeId() {
-		return this.officeId;
+		return officeId;
 	}
 
 	public String getOfficeName() {
-		return this.officeName;
-	}
-
-	public void setId(final Long id) {
-		this.id = id;
-	}
-
-	public void setUsername(final String username) {
-		this.username = username;
-	}
-
-	public void setEmail(final String email) {
-		this.email = email;
-	}
-
-	public void setOfficeId(final Long officeId) {
-		this.officeId = officeId;
-	}
-
-	public void setOfficeName(final String officeName) {
-		this.officeName = officeName;
-	}
-
-	public List<OfficeLookup> getAllowedOffices() {
-		return allowedOffices;
-	}
-
-	public void setAllowedOffices(List<OfficeLookup> allowedOffices) {
-		this.allowedOffices = allowedOffices;
-	}
-
-	public List<RoleData> getAvailableRoles() {
-		return availableRoles;
-	}
-
-	public void setAvailableRoles(List<RoleData> availableRoles) {
-		this.availableRoles = availableRoles;
-	}
-
-	public List<RoleData> getSelectedRoles() {
-		return selectedRoles;
-	}
-
-	public void setSelectedRoles(List<RoleData> selectedRoles) {
-		this.selectedRoles = selectedRoles;
+		return officeName;
 	}
 
 	public String getFirstname() {
 		return firstname;
 	}
 
-	public void setFirstname(String firstname) {
-		this.firstname = firstname;
-	}
-
 	public String getLastname() {
 		return lastname;
 	}
 
-	public void setLastname(String lastname) {
-		this.lastname = lastname;
+	public String getEmail() {
+		return email;
+	}
+
+	public List<OfficeLookup> getAllowedOffices() {
+		return allowedOffices;
+	}
+
+	public List<RoleData> getAvailableRoles() {
+		return availableRoles;
+	}
+
+	public List<RoleData> getSelectedRoles() {
+		return selectedRoles;
 	}
 }

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

@@ -1,17 +1,14 @@
 package org.mifosng.platform.api.data;
 
-import java.io.Serializable;
+/**
+ * Immutable data object for permission data.
+ */
+public class PermissionData {
 
-public class PermissionData implements Serializable {
-
-	private Long id;
-	private String name;
-	private String description;
-	private String code;
-
-	public PermissionData() {
-		//
-	}
+	private final Long id;
+	private final String name;
+	private final String description;
+	private final String code;
 
 	public PermissionData(final Long id, final String name, final String description, final String code) {
 		this.id = id;
@@ -32,34 +29,18 @@ public class PermissionData implements Serializable {
 	}
 
 	public Long getId() {
-		return this.id;
+		return id;
 	}
 
 	public String getName() {
-		return this.name;
+		return name;
 	}
 
 	public String getDescription() {
-		return this.description;
+		return description;
 	}
 
 	public String getCode() {
-		return this.code;
-	}
-
-	public void setId(final Long id) {
-		this.id = id;
-	}
-
-	public void setName(final String name) {
-		this.name = name;
-	}
-
-	public void setDescription(final String description) {
-		this.description = description;
-	}
-
-	public void setCode(final String code) {
-		this.code = code;
+		return code;
 	}
 }

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

@@ -3,27 +3,44 @@ package org.mifosng.platform.api.data;
 import java.util.ArrayList;
 import java.util.Collection;
 
+/**
+ * Immutable data object for role data.
+ */
 public class RoleData {
 
-	private Long id;
-	private String name;
-	private String description;
+	private final Long id;
+	private final String name;
+	private final String description;
 	
-	private Collection<PermissionData> availablePermissions = new ArrayList<PermissionData>();
-	private Collection<PermissionData> selectedPermissions = new ArrayList<PermissionData>();
+	private final Collection<PermissionData> availablePermissions;
+	private final Collection<PermissionData> selectedPermissions;
 
-	public RoleData() {
-		//
-	}
-
-	public RoleData(final Long id, final String name, final String description) {
+	public RoleData(final Long id, final String name, final String description, final Collection<PermissionData> selectedPermissions) {
 		this.id = id;
 		this.name = name;
 		this.description = description;
+		this.availablePermissions = new ArrayList<PermissionData>();
+		this.selectedPermissions = new ArrayList<PermissionData>(selectedPermissions);
 	}
 	
+	public RoleData(final Collection<PermissionData> availablePermissions, final Collection<PermissionData> selectedPermissions) {
+		this.id = null;
+		this.name = null;
+		this.description = null;
+		this.availablePermissions = new ArrayList<PermissionData>(availablePermissions);
+		this.selectedPermissions = new ArrayList<PermissionData>(selectedPermissions);
+	}
+
+	public RoleData(RoleData role, final Collection<PermissionData> availablePermissions) {
+		this.id = role.getId();
+		this.name = role.getName();
+		this.description = role.getDescription();
+		this.availablePermissions = new ArrayList<PermissionData>(availablePermissions);
+		this.selectedPermissions = role.getSelectedPermissions();
+	}
+
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(final Object obj) {
 		RoleData role = (RoleData) obj;
 		return this.id.equals(role.getId());
 	}
@@ -34,44 +51,22 @@ public class RoleData {
 	}
 
 	public Long getId() {
-		return this.id;
+		return id;
 	}
 
 	public String getName() {
-		return this.name;
+		return name;
 	}
 
 	public String getDescription() {
-		return this.description;
-	}
-
-	public void setId(final Long id) {
-		this.id = id;
-	}
-
-	public void setName(final String name) {
-		this.name = name;
-	}
-
-	public void setDescription(final String description) {
-		this.description = description;
+		return description;
 	}
 
 	public Collection<PermissionData> getAvailablePermissions() {
 		return availablePermissions;
 	}
 
-	public void setAvailablePermissions(
-			Collection<PermissionData> availablePermissions) {
-		this.availablePermissions = availablePermissions;
-	}
-
 	public Collection<PermissionData> getSelectedPermissions() {
 		return selectedPermissions;
 	}
-
-	public void setSelectedPermissions(
-			Collection<PermissionData> selectedPermissions) {
-		this.selectedPermissions = selectedPermissions;
-	}
 }

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

@@ -7,8 +7,8 @@ import org.mifosng.platform.api.commands.AdjustLoanTransactionCommand;
 import org.mifosng.platform.api.commands.BranchMoneyTransferCommand;
 import org.mifosng.platform.api.commands.ChargeCommand;
 import org.mifosng.platform.api.commands.ClientCommand;
-import org.mifosng.platform.api.commands.DepositProductCommand;
 import org.mifosng.platform.api.commands.DepositAccountCommand;
+import org.mifosng.platform.api.commands.DepositProductCommand;
 import org.mifosng.platform.api.commands.FundCommand;
 import org.mifosng.platform.api.commands.GroupCommand;
 import org.mifosng.platform.api.commands.LoanProductCommand;
@@ -22,14 +22,13 @@ import org.mifosng.platform.api.commands.SavingProductCommand;
 import org.mifosng.platform.api.commands.SubmitLoanApplicationCommand;
 import org.mifosng.platform.api.commands.UserCommand;
 import org.mifosng.platform.api.data.AdditionalFieldsSetData;
-import org.mifosng.platform.api.data.AppUserData;
 import org.mifosng.platform.api.data.AuthenticatedUserData;
 import org.mifosng.platform.api.data.ChargeData;
 import org.mifosng.platform.api.data.ClientData;
 import org.mifosng.platform.api.data.ClientLoanAccountSummaryCollectionData;
 import org.mifosng.platform.api.data.ConfigurationData;
-import org.mifosng.platform.api.data.DepositProductData;
 import org.mifosng.platform.api.data.DepositAccountData;
+import org.mifosng.platform.api.data.DepositProductData;
 import org.mifosng.platform.api.data.FundData;
 import org.mifosng.platform.api.data.GenericResultsetData;
 import org.mifosng.platform.api.data.GroupData;
@@ -40,19 +39,11 @@ import org.mifosng.platform.api.data.NewLoanData;
 import org.mifosng.platform.api.data.NoteData;
 import org.mifosng.platform.api.data.OfficeData;
 import org.mifosng.platform.api.data.OfficeTransactionData;
-import org.mifosng.platform.api.data.PermissionData;
-import org.mifosng.platform.api.data.RoleData;
 import org.mifosng.platform.api.data.SavingProductData;
 
 public interface ApiDataConversionService {
 	
 	//
-	String convertPermissionDataToJson(boolean prettyPrint, Set<String> responseParameters, PermissionData... permissions);
-	
-	String convertRoleDataToJson(boolean prettyPrint, Set<String> responseParameters, RoleData... roles);
-	
-	String convertAppUserDataToJson(boolean prettyPrint, Set<String> responseParameters, AppUserData... users);
-	
 	String convertOfficeTransactionDataToJson(boolean prettyPrint, Set<String> responseParameters, OfficeTransactionData... officeTransactions);
 	
 	String convertConfigurationDataToJson(boolean prettyPrint, Set<String> responseParameters, ConfigurationData... configuration);

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

@@ -23,8 +23,8 @@ import org.mifosng.platform.api.commands.AdjustLoanTransactionCommand;
 import org.mifosng.platform.api.commands.BranchMoneyTransferCommand;
 import org.mifosng.platform.api.commands.ChargeCommand;
 import org.mifosng.platform.api.commands.ClientCommand;
-import org.mifosng.platform.api.commands.DepositProductCommand;
 import org.mifosng.platform.api.commands.DepositAccountCommand;
+import org.mifosng.platform.api.commands.DepositProductCommand;
 import org.mifosng.platform.api.commands.FundCommand;
 import org.mifosng.platform.api.commands.GroupCommand;
 import org.mifosng.platform.api.commands.LoanProductCommand;
@@ -39,14 +39,13 @@ import org.mifosng.platform.api.commands.SubmitLoanApplicationCommand;
 import org.mifosng.platform.api.commands.UserCommand;
 import org.mifosng.platform.api.data.AdditionalFieldsSetData;
 import org.mifosng.platform.api.data.ApiParameterError;
-import org.mifosng.platform.api.data.AppUserData;
 import org.mifosng.platform.api.data.AuthenticatedUserData;
 import org.mifosng.platform.api.data.ChargeData;
 import org.mifosng.platform.api.data.ClientData;
 import org.mifosng.platform.api.data.ClientLoanAccountSummaryCollectionData;
 import org.mifosng.platform.api.data.ConfigurationData;
-import org.mifosng.platform.api.data.DepositProductData;
 import org.mifosng.platform.api.data.DepositAccountData;
+import org.mifosng.platform.api.data.DepositProductData;
 import org.mifosng.platform.api.data.FundData;
 import org.mifosng.platform.api.data.GenericResultsetData;
 import org.mifosng.platform.api.data.GroupData;
@@ -57,8 +56,6 @@ import org.mifosng.platform.api.data.NewLoanData;
 import org.mifosng.platform.api.data.NoteData;
 import org.mifosng.platform.api.data.OfficeData;
 import org.mifosng.platform.api.data.OfficeTransactionData;
-import org.mifosng.platform.api.data.PermissionData;
-import org.mifosng.platform.api.data.RoleData;
 import org.mifosng.platform.api.data.SavingProductData;
 import org.mifosng.platform.api.errorhandling.InvalidJsonException;
 import org.mifosng.platform.api.errorhandling.UnsupportedParameterException;
@@ -493,110 +490,6 @@ public class ApiDataConversionServiceImpl implements ApiDataConversionService {
 		
 		return json;
 	}
-
-	@Override
-	public String convertAppUserDataToJson(final boolean prettyPrint, final Set<String> responseParameters, final AppUserData... users) {
-		
-		final Set<String> supportedParameters = new HashSet<String>(Arrays.asList("id", "officeId", "officeName", "username", "firstname", "lastname", "email",
-				"allowedOffices", "availableRoles", "selectedRoles"));
-		
-		final Set<String> parameterNamesToSkip = new HashSet<String>();
-		
-		if (!responseParameters.isEmpty()) {
-			if (!supportedParameters.containsAll(responseParameters)) {
-				throw new UnsupportedParameterException(new ArrayList<String>(responseParameters));
-			}
-			
-			parameterNamesToSkip.addAll(supportedParameters);
-			parameterNamesToSkip.removeAll(responseParameters);
-		}
-		
-		ExclusionStrategy strategy = new ParameterListExclusionStrategy(parameterNamesToSkip);
-		
-		GsonBuilder builder = new GsonBuilder().addSerializationExclusionStrategy(strategy);
-		builder.registerTypeAdapter(LocalDate.class, new JodaLocalDateAdapter());
-		if (prettyPrint) {
-			builder.setPrettyPrinting();
-		}
-		Gson gsonDeserializer = builder.create();
-		
-		String json = "";
-		if (users != null && users.length == 1) {
-			json = gsonDeserializer.toJson(users[0]);
-		} else {
-			json = gsonDeserializer.toJson(users);
-		}
-		
-		return json;
-	}
-	
-	@Override
-	public String convertRoleDataToJson(final boolean prettyPrint, final Set<String> responseParameters, final RoleData... roles) {
-		final Set<String> supportedParameters = new HashSet<String>(Arrays.asList("id", "name", "description", "availablePermissions", "selectedPermissions"));
-		
-		final Set<String> parameterNamesToSkip = new HashSet<String>();
-		
-		if (!responseParameters.isEmpty()) {
-			if (!supportedParameters.containsAll(responseParameters)) {
-				throw new UnsupportedParameterException(new ArrayList<String>(responseParameters));
-			}
-			
-			parameterNamesToSkip.addAll(supportedParameters);
-			parameterNamesToSkip.removeAll(responseParameters);
-		}
-		
-		ExclusionStrategy strategy = new ParameterListExclusionStrategy(parameterNamesToSkip);
-		
-		GsonBuilder builder = new GsonBuilder().addSerializationExclusionStrategy(strategy);
-		builder.registerTypeAdapter(LocalDate.class, new JodaLocalDateAdapter());
-		if (prettyPrint) {
-			builder.setPrettyPrinting();
-		}
-		Gson gsonDeserializer = builder.create();
-		
-		String json = "";
-		if (roles != null && roles.length == 1) {
-			json = gsonDeserializer.toJson(roles[0]);
-		} else {
-			json = gsonDeserializer.toJson(roles);
-		}
-		
-		return json;
-	}
-	
-	@Override
-	public String convertPermissionDataToJson(final boolean prettyPrint, final Set<String> responseParameters, final PermissionData... permissions) {
-		final Set<String> supportedParameters = new HashSet<String>(Arrays.asList("id", "name", "description", "code"));
-		
-		final Set<String> parameterNamesToSkip = new HashSet<String>();
-		
-		if (!responseParameters.isEmpty()) {
-			if (!supportedParameters.containsAll(responseParameters)) {
-				throw new UnsupportedParameterException(new ArrayList<String>(responseParameters));
-			}
-			
-			parameterNamesToSkip.addAll(supportedParameters);
-			parameterNamesToSkip.removeAll(responseParameters);
-		}
-		
-		ExclusionStrategy strategy = new ParameterListExclusionStrategy(parameterNamesToSkip);
-		
-		GsonBuilder builder = new GsonBuilder().addSerializationExclusionStrategy(strategy);
-		builder.registerTypeAdapter(LocalDate.class, new JodaLocalDateAdapter());
-		if (prettyPrint) {
-			builder.setPrettyPrinting();
-		}
-		Gson gsonDeserializer = builder.create();
-		
-		String json = "";
-		if (permissions != null && permissions.length == 1) {
-			json = gsonDeserializer.toJson(permissions[0]);
-		} else {
-			json = gsonDeserializer.toJson(permissions);
-		}
-		
-		return json;
-	}
 	
 	@Override
 	public String convertOfficeDataToJson(final boolean prettyPrint, final Set<String> responseParameters, final OfficeData... offices) {

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

@@ -0,0 +1,22 @@
+package org.mifosng.platform.api.infrastructure;
+
+import java.util.Collection;
+import java.util.Set;
+
+import org.mifosng.platform.api.data.AppUserData;
+import org.mifosng.platform.api.data.PermissionData;
+import org.mifosng.platform.api.data.RoleData;
+
+public interface ApiJsonSerializerService {
+
+	String serializePermissionDataToJson(boolean prettyPrint, Set<String> responseParameters, Collection<PermissionData> permissions);
+
+	String serializeRoleDataToJson(boolean prettyPrint, Set<String> responseParameters, Collection<RoleData> roles);
+
+	String serializeRoleDataToJson(boolean prettyPrint, Set<String> responseParameters, RoleData role);
+
+	String serializeAppUserDataToJson(boolean prettyPrint, Set<String> responseParameters, Collection<AppUserData> users);
+
+	String serializeAppUserDataToJson(boolean prettyPrint, Set<String> responseParameters, AppUserData user);
+	
+}

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

@@ -0,0 +1,64 @@
+package org.mifosng.platform.api.infrastructure;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
+
+import org.mifosng.platform.api.data.AppUserData;
+import org.mifosng.platform.api.data.PermissionData;
+import org.mifosng.platform.api.data.RoleData;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import com.google.gson.Gson;
+
+/**
+ * Implementation of {@link ApiJsonSerializerService} that uses google-gson to serialize Java object representation into JSON.
+ */
+@Service
+public class GoogleGsonApiJsonSerializerService implements ApiJsonSerializerService {
+
+	private static final Set<String> PERMISSION_DATA_PARAMETERS = new HashSet<String>(Arrays.asList("id", "name", "description", "code"));
+	private static final Set<String> ROLE_DATA_PARAMETERS = new HashSet<String>(Arrays.asList("id", "name", "description", "availablePermissions", "selectedPermissions"));
+	private static final Set<String> APP_USER_DATA_PARAMETERS = new HashSet<String>(
+			Arrays.asList("id", "officeId", "officeName", "username", "firstname", "lastname", "email",
+			"allowedOffices", "availableRoles", "selectedRoles"));
+
+	private final GoogleGsonSerializerHelper helper;
+	
+	@Autowired
+	public GoogleGsonApiJsonSerializerService(final GoogleGsonSerializerHelper helper) {
+		this.helper = helper;
+	}
+	
+	@Override
+	public String serializePermissionDataToJson(final boolean prettyPrint, final Set<String> responseParameters, final Collection<PermissionData> permissions) {
+		final Gson gsonDeserializer = helper.createGsonBuilderWithParameterExclusionSerializationStrategy(PERMISSION_DATA_PARAMETERS, prettyPrint, responseParameters);
+		return helper.serializedJsonFrom(gsonDeserializer, permissions.toArray(new PermissionData[permissions.size()]));
+	}
+	
+	@Override
+	public String serializeRoleDataToJson(final boolean prettyPrint, final Set<String> responseParameters, final Collection<RoleData> roles) {
+		final Gson gsonDeserializer = helper.createGsonBuilderWithParameterExclusionSerializationStrategy(ROLE_DATA_PARAMETERS, prettyPrint, responseParameters);
+		return helper.serializedJsonFrom(gsonDeserializer, roles.toArray(new RoleData[roles.size()]));
+	}
+	
+	@Override
+	public String serializeRoleDataToJson(final boolean prettyPrint, final Set<String> responseParameters, final RoleData role) {
+		final Gson gsonDeserializer = helper.createGsonBuilderWithParameterExclusionSerializationStrategy(ROLE_DATA_PARAMETERS, prettyPrint, responseParameters);
+		return helper.serializedJsonFrom(gsonDeserializer, role);
+	}
+
+	@Override
+	public String serializeAppUserDataToJson(final boolean prettyPrint, final Set<String> responseParameters, final Collection<AppUserData> users) {
+		final Gson gsonDeserializer = helper.createGsonBuilderWithParameterExclusionSerializationStrategy(APP_USER_DATA_PARAMETERS, prettyPrint, responseParameters);
+		return helper.serializedJsonFrom(gsonDeserializer, users.toArray(new AppUserData[users.size()]));
+	}
+
+	@Override
+	public String serializeAppUserDataToJson(final boolean prettyPrint, final Set<String> responseParameters, final AppUserData user) {
+		final Gson gsonDeserializer = helper.createGsonBuilderWithParameterExclusionSerializationStrategy(APP_USER_DATA_PARAMETERS, prettyPrint, responseParameters);
+		return helper.serializedJsonFrom(gsonDeserializer, user);
+	}
+}

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

@@ -0,0 +1,62 @@
+package org.mifosng.platform.api.infrastructure;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.Set;
+
+import org.joda.time.DateTime;
+import org.joda.time.LocalDate;
+import org.mifosng.platform.api.errorhandling.UnsupportedParameterException;
+import org.springframework.stereotype.Service;
+
+import com.google.gson.ExclusionStrategy;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+/**
+ * Helper class for serialization of java objects into JSON using google-gson.
+ */
+@Service
+public class GoogleGsonSerializerHelper {
+
+	public Gson createGsonBuilderWithParameterExclusionSerializationStrategy(
+			final Set<String> supportedParameters, 
+			final boolean prettyPrint,
+			final Set<String> responseParameters) {
+
+		final Set<String> parameterNamesToSkip = new HashSet<String>();
+
+		if (!responseParameters.isEmpty()) {
+
+			// strip out all know support parameters from expected response to
+			// see if unsupported parameters requested for response.
+			final Set<String> differentParametersDetectedSet = new HashSet<String>(responseParameters);
+			differentParametersDetectedSet.removeAll(supportedParameters);
+
+			if (!differentParametersDetectedSet.isEmpty()) {
+				throw new UnsupportedParameterException(new ArrayList<String>(differentParametersDetectedSet));
+			}
+
+			parameterNamesToSkip.addAll(supportedParameters);
+			parameterNamesToSkip.removeAll(responseParameters);
+		}
+
+		final ExclusionStrategy strategy = new ParameterListExclusionStrategy(parameterNamesToSkip);
+
+		final GsonBuilder builder = new GsonBuilder().addSerializationExclusionStrategy(strategy);
+		builder.registerTypeAdapter(LocalDate.class, new JodaLocalDateAdapter());
+		builder.registerTypeAdapter(DateTime.class, new JodaDateTimeAdapter());
+		if (prettyPrint) {
+			builder.setPrettyPrinting();
+		}
+		return builder.create();
+	}
+
+	public String serializedJsonFrom(final Gson serializer, final Object[] dataObjects) {
+		return serializer.toJson(dataObjects);
+	}
+
+	public String serializedJsonFrom(final Gson serializer, final Object singleDataObject) {
+		return serializer.toJson(singleDataObject);
+	}
+}

mifosng-provider/src/main/java/org/mifosng/platform/user/domain/Role.java

@@ -62,16 +62,13 @@ public class Role extends AbstractAuditableCustom<AppUser, Long> {
 
 	public RoleData toData() {
 		
-		RoleData data = new RoleData(this.getId(), this.name, this.description);
-		
 		Collection<PermissionData> rolePermissions = new ArrayList<PermissionData>();
 		for (Permission permission : this.permissions) {
 			PermissionData permissionData = permission.toData();
 			rolePermissions.add(permissionData);
 		}
-		data.setSelectedPermissions(rolePermissions);
 		
-		return data;
+		return new RoleData(this.getId(), this.name, this.description, rolePermissions);
 	}
 
 	public void update(final RoleCommand command, final List<Permission> selectedPermissions) {

mifosng-provider/src/main/java/org/mifosng/platform/user/service/AppUserReadPlatformServiceImpl.java

@@ -79,9 +79,7 @@ public class AppUserReadPlatformServiceImpl implements AppUserReadPlatformServic
 
 		List<RoleData> availableRoles = new ArrayList<RoleData>(this.roleReadPlatformService.retrieveAllRoles());
 
-		AppUserData userData = new AppUserData();
-		userData.setAllowedOffices(offices);
-		userData.setAvailableRoles(availableRoles);
+		AppUserData userData = new AppUserData(offices, availableRoles);
 
 		return userData;
 	}
@@ -98,21 +96,17 @@ public class AppUserReadPlatformServiceImpl implements AppUserReadPlatformServic
 
 		List<RoleData> availableRoles = new ArrayList<RoleData>(this.roleReadPlatformService.retrieveAllRoles());
 		
-		List<RoleData> userRoleData = new ArrayList<RoleData>();
+		List<RoleData> selectedUserRoles = new ArrayList<RoleData>();
 		Set<Role> userRoles = user.getRoles();
 		for (Role role : userRoles) {
-			userRoleData.add(role.toData());
+			selectedUserRoles.add(role.toData());
 		}
 
+		availableRoles.removeAll(selectedUserRoles);
+		
 		AppUserData userData = new AppUserData(user.getId(),
 				user.getUsername(), user.getEmail(), user.getOffice().getId(), user.getOffice()
-						.getName());
-		userData.setFirstname(user.getFirstname());
-		userData.setLastname(user.getLastname());
-
-		availableRoles.removeAll(userRoleData);
-		userData.setAvailableRoles(availableRoles);
-		userData.setSelectedRoles(userRoleData);
+						.getName(), user.getFirstname(), user.getLastname(), availableRoles, selectedUserRoles);
 
 		return userData;
 	}
@@ -139,9 +133,7 @@ public class AppUserReadPlatformServiceImpl implements AppUserReadPlatformServic
 			// FIXME - change sql query to join to get office id and name information.
 			String officeName = fromOfficeList(this.offices, officeId);
 
-			AppUserData user = new AppUserData(id, username, email, officeId, officeName);
-			user.setLastname(lastname);
-			user.setFirstname(firstname);
+			AppUserData user = new AppUserData(id, username, email, officeId, officeName, firstname, lastname, new ArrayList<RoleData>(),  new ArrayList<RoleData>());
 
 			return user;
 		}

mifosng-provider/src/main/java/org/mifosng/platform/user/service/RoleReadPlatformServiceImpl.java

@@ -2,8 +2,10 @@ package org.mifosng.platform.user.service;
 
 import java.sql.ResultSet;
 import java.sql.SQLException;
+import java.util.ArrayList;
 import java.util.Collection;
 
+import org.mifosng.platform.api.data.PermissionData;
 import org.mifosng.platform.api.data.RoleData;
 import org.mifosng.platform.exceptions.RoleNotFoundException;
 import org.mifosng.platform.infrastructure.JdbcSupport;
@@ -61,7 +63,8 @@ public class RoleReadPlatformServiceImpl implements RoleReadPlatformService {
 			String name = rs.getString("name");
 			String description = rs.getString("description");
 
-			return new RoleData(id, name, description);
+			Collection<PermissionData> selectedPermissions = new ArrayList<PermissionData>(0);
+			return new RoleData(id, name, description, selectedPermissions);
 		}
 
 		public String schema() {