Insert custom constraintViolationException

Signed-off-by: Melanie Retter <melanie.retter@bosch-si.com>

hawkbit-core/src/main/java/org/eclipse/hawkbit/exception/SpServerError.java

@@ -21,6 +21,10 @@ public enum SpServerError {
     *
     */
     SP_REPO_ENTITY_ALRREADY_EXISTS("hawkbit.server.error.repo.entitiyAlreayExists", "The given entity already exists in database"),
+    /**
+    *
+    */
+    SP_REPO_CONSTRAINT_VIOLATION("hawkbit.server.error.repo.constraintViolation", "The given entity cannot be saved due to Constraint Violation"),
     /**
      * 
      */

hawkbit-repository/hawkbit-repository-api/src/main/java/org/eclipse/hawkbit/repository/exception/ConstraintViolationException.java

@@ -0,0 +1,33 @@
+/**
+ * Copyright (c) 2015 Bosch Software Innovations GmbH and others.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.eclipse.hawkbit.repository.exception;
+
+import org.eclipse.hawkbit.exception.AbstractServerRtException;
+import org.eclipse.hawkbit.exception.SpServerError;
+
+/**
+ * the {@link ConstraintViolationException} is thrown when an entity is
+ * tried to be saved which has constraint violations
+ *
+ */
+public class ConstraintViolationException extends AbstractServerRtException {
+
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * Constructor for {@link ConstraintViolationException}
+     * 
+     * @param message
+     *            the message to be displayed as exception message
+     */
+    public ConstraintViolationException(final String message) {
+        super(message, SpServerError.SP_REPO_CONSTRAINT_VIOLATION);
+    }
+
+}

hawkbit-rest-core/src/main/java/org/eclipse/hawkbit/rest/exception/ResponseExceptionHandler.java

@@ -8,11 +8,14 @@
  */
 package org.eclipse.hawkbit.rest.exception;
 
+import java.util.ArrayList;
 import java.util.EnumMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 import javax.servlet.http.HttpServletRequest;
+import javax.validation.ConstraintViolation;
 import javax.validation.ConstraintViolationException;
 
 import org.apache.commons.lang3.exception.ExceptionUtils;
@@ -137,8 +140,17 @@ public class ResponseExceptionHandler {
     public ResponseEntity<ExceptionInfo> handleConstraintViolationException(final HttpServletRequest request,
             final Exception ex) {
         logRequest(request, ex);
-        final ExceptionInfo response = createExceptionInfo(
+
-                new ConstraintViolationException(((ConstraintViolationException) ex).getConstraintViolations()));
+        final ExceptionInfo response = null;
+        final Set<ConstraintViolation<?>> violations = ((ConstraintViolationException) ex).getConstraintViolations();
+
+        final List<String> messages = new ArrayList<>();
+        violations.stream()
+                .forEach(violation -> messages.add(violation.getPropertyPath() + " " + violation.getMessage() + ". "));
+
+        // response = createExceptionInfo(new
+        // org.eclipse.hawkbit.repository.exception.ConstraintViolationException(
+        // messages.forEach(StringBuilder::append(this))));
         return new ResponseEntity<>(response, HttpStatus.BAD_REQUEST);
     }