FINERACT-2326: Not implemented exception handling

fineract-core/src/main/java/org/apache/fineract/infrastructure/core/data/ApiGlobalErrorResponse.java

@@ -25,6 +25,7 @@ import static org.apache.http.HttpStatus.SC_FORBIDDEN;
 import static org.apache.http.HttpStatus.SC_INTERNAL_SERVER_ERROR;
 import static org.apache.http.HttpStatus.SC_METHOD_NOT_ALLOWED;
 import static org.apache.http.HttpStatus.SC_NOT_FOUND;
+import static org.apache.http.HttpStatus.SC_NOT_IMPLEMENTED;
 import static org.apache.http.HttpStatus.SC_SERVICE_UNAVAILABLE;
 import static org.apache.http.HttpStatus.SC_UNAUTHORIZED;
 
@@ -139,6 +140,15 @@ public class ApiGlobalErrorResponse {
                 "Errors contain reason for domain rule violation.", errors);
     }
 
+    public static ApiGlobalErrorResponse notImplemented(final String globalisationMessageCode, final String defaultUserMessage,
+            final Object... defaultUserMessageArgs) {
+        final List<ApiParameterError> errors = new ArrayList<>();
+        errors.add(ApiParameterError.generalError(globalisationMessageCode, defaultUserMessage, defaultUserMessageArgs));
+
+        return create(SC_NOT_IMPLEMENTED, "validation.msg.not.implemented", "Request was understood but not implemented.",
+                "Errors contain reason for not implemented violation.", errors);
+    }
+
     public static ApiGlobalErrorResponse dataIntegrityError(final String globalisationMessageCode, final String defaultUserMessage,
             final String parameterName, final Object... defaultUserMessageArgs) {
         final List<ApiParameterError> errors = new ArrayList<>();

fineract-core/src/main/java/org/apache/fineract/infrastructure/core/exceptionmapper/UnsupporterOperationExceptionMapper.java

@@ -0,0 +1,56 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.fineract.infrastructure.core.exceptionmapper;
+
+import jakarta.ws.rs.core.MediaType;
+import jakarta.ws.rs.core.Response;
+import jakarta.ws.rs.core.Response.Status;
+import jakarta.ws.rs.ext.ExceptionMapper;
+import jakarta.ws.rs.ext.Provider;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.fineract.infrastructure.core.data.ApiGlobalErrorResponse;
+import org.apache.fineract.infrastructure.core.exception.ErrorHandler;
+import org.springframework.context.annotation.Scope;
+import org.springframework.stereotype.Component;
+
+/**
+ * An {@link ExceptionMapper} to map {@link UnsupportedOperationException} thrown by platform into a HTTP API friendly
+ * format.
+ *
+ * The {@link UnsupportedOperationException} is thrown when an operation was not yet implemented.
+ */
+@Provider
+@Component
+@Scope("singleton")
+@Slf4j
+public class UnsupporterOperationExceptionMapper implements FineractExceptionMapper, ExceptionMapper<UnsupportedOperationException> {
+
+    @Override
+    public Response toResponse(final UnsupportedOperationException exception) {
+        log.warn("Exception occurred", ErrorHandler.findMostSpecificException(exception));
+        final ApiGlobalErrorResponse notFoundErrorResponse = ApiGlobalErrorResponse.notImplemented("not.implemented",
+                exception.getMessage());
+        return Response.status(Status.NOT_IMPLEMENTED).entity(notFoundErrorResponse).type(MediaType.APPLICATION_JSON).build();
+    }
+
+    @Override
+    public int errorCode() {
+        return 5010;
+    }
+}