1 files changed, 116 insertions, 0 deletions
diff --git a/openecomp-be/lib/openecomp-common-lib/src/main/java/org/openecomp/sdc/common/errors/DefaultExceptionMapper.java b/openecomp-be/lib/openecomp-common-lib/src/main/java/org/openecomp/sdc/common/errors/DefaultExceptionMapper.java
new file mode 100644
index 0000000000..a059434709
--- /dev/null
+++ b/openecomp-be/lib/openecomp-common-lib/src/main/java/org/openecomp/sdc/common/errors/DefaultExceptionMapper.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed 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.openecomp.sdc.common.errors;
+
+import com.fasterxml.jackson.databind.JsonMappingException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import javax.validation.ConstraintViolation;
+import javax.validation.ConstraintViolationException;
+import javax.validation.Path;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.Status;
+import javax.ws.rs.ext.ExceptionMapper;
+import org.apache.commons.collections4.CollectionUtils;
+import org.hibernate.validator.internal.engine.path.PathImpl;
+import org.openecomp.core.utilities.file.FileUtils;
+import org.openecomp.core.utilities.json.JsonUtil;
+import org.openecomp.sdc.logging.api.Logger;
+import org.openecomp.sdc.logging.api.LoggerFactory;
+
+public class DefaultExceptionMapper implements ExceptionMapper<Exception> {
+
+    private static final String ERROR_CODES_TO_RESPONSE_STATUS_MAPPING_FILE = "errorCodesToResponseStatusMapping.json";
+    @SuppressWarnings("unchecked")
+    private static final Map<String, String> ERROR_CODE_TO_RESPONSE_STATUS = FileUtils
+        .readViaInputStream(ERROR_CODES_TO_RESPONSE_STATUS_MAPPING_FILE, stream -> JsonUtil.json2Object(stream, Map.class));
+    private static final Logger LOGGER = LoggerFactory.getLogger(DefaultExceptionMapper.class);
+
+    @Override
+    public Response toResponse(Exception exception) {
+        Response response;
+        if (exception instanceof CoreException) {
+            response = transform((CoreException) exception);
+        } else if (exception instanceof ConstraintViolationException) {
+            response = transform((ConstraintViolationException) exception);
+        } else if (exception instanceof JsonMappingException) {
+            response = transform((JsonMappingException) exception);
+        } else {
+            response = transform(exception);
+        }
+        List<Object> contentTypes = new ArrayList<>();
+        contentTypes.add(MediaType.APPLICATION_JSON);
+        response.getMetadata().put("Content-Type", contentTypes);
+        return response;
+    }
+
+    private Response transform(final CoreException coreException) {
+        final ErrorCode code = coreException.code();
+        LOGGER.error(code.message(), coreException);
+        if (coreException.code().category().equals(ErrorCategory.APPLICATION)) {
+            final Status errorStatus = Status.valueOf(ERROR_CODE_TO_RESPONSE_STATUS.get(code.id()));
+            if (List.of(Status.BAD_REQUEST, Status.FORBIDDEN, Status.NOT_FOUND, Status.INTERNAL_SERVER_ERROR).contains(errorStatus)) {
+                return buildResponse(errorStatus, code);
+            }
+            return buildResponse(Status.EXPECTATION_FAILED, code);
+        }
+        return buildResponse(Status.INTERNAL_SERVER_ERROR, code);
+    }
+
+    private Response buildResponse(final Status status, final ErrorCode code) {
+        return Response.status(status).entity(toEntity(status, code)).build();
+    }
+
+    private Response transform(ConstraintViolationException validationException) {
+        Set<ConstraintViolation<?>> constraintViolationSet = validationException.getConstraintViolations();
+        String message;
+        String fieldName = null;
+        if (CollectionUtils.isEmpty(constraintViolationSet)) {
+            message = validationException.getMessage();
+        } else {
+            // getting the first violation message for the output response.
+            ConstraintViolation<?> constraintViolation = constraintViolationSet.iterator().next();
+            message = constraintViolation.getMessage();
+            fieldName = getFieldName(constraintViolation.getPropertyPath());
+        }
+        ErrorCode validationErrorCode = new ValidationErrorBuilder(message, fieldName).build();
+        LOGGER.error(validationErrorCode.message(), validationException);
+        return buildResponse(Status.EXPECTATION_FAILED, validationErrorCode);
+    }
+
+    private Response transform(JsonMappingException jsonMappingException) {
+        ErrorCode jsonMappingErrorCode = new JsonMappingErrorBuilder().build();
+        LOGGER.error(jsonMappingErrorCode.message(), jsonMappingException);
+        return buildResponse(Status.EXPECTATION_FAILED, jsonMappingErrorCode);
+    }
+
+    private Response transform(Exception exception) {
+        ErrorCode errorCode = new GeneralErrorBuilder().build();
+        LOGGER.error(errorCode.message(), exception);
+        return buildResponse(Status.INTERNAL_SERVER_ERROR, errorCode);
+    }
+
+    private String getFieldName(Path propertyPath) {
+        return ((PathImpl) propertyPath).getLeafNode().toString();
+    }
+
+    private Object toEntity(final Status status, final ErrorCode code) {
+        return new ErrorCodeAndMessage(status, code);
+    }
+}