Improve network config validation errors to show which fields are invalid.
Previously, uploading invalid config results in a generic error message
which makes it difficult to figure out what is wrong with the config
Change-Id: I307d2fc0669679b067389c722556eef3aae098b9
diff --git a/web/api/src/main/java/org/onosproject/rest/exceptions/InvalidConfigExceptionMapper.java b/web/api/src/main/java/org/onosproject/rest/exceptions/InvalidConfigExceptionMapper.java
new file mode 100644
index 0000000..ecbe0af
--- /dev/null
+++ b/web/api/src/main/java/org/onosproject/rest/exceptions/InvalidConfigExceptionMapper.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * 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.onosproject.rest.exceptions;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.onlab.rest.exceptions.AbstractMapper;
+import org.onosproject.net.config.InvalidConfigException;
+import org.onosproject.net.config.InvalidFieldException;
+
+import javax.ws.rs.core.Response;
+
+/**
+ * Maps InvalidConfigException to JSON output.
+ */
+public class InvalidConfigExceptionMapper extends AbstractMapper<InvalidConfigException> {
+
+ @Override
+ protected Response.Status responseStatus() {
+ return Response.Status.BAD_REQUEST;
+ }
+
+ @Override
+ protected Response.ResponseBuilder response(Response.Status status, Throwable exception) {
+ error = exception;
+
+ InvalidConfigException ex = (InvalidConfigException) exception;
+
+ ObjectMapper mapper = new ObjectMapper();
+ String message = messageFrom(exception);
+ ObjectNode result = mapper.createObjectNode()
+ .put("code", status.getStatusCode())
+ .put("message", message)
+ .put("subjectKey", ex.subjectKey())
+ .put("subject", ex.subject())
+ .put("configKey", ex.configKey());
+
+ if (ex.getCause() instanceof InvalidFieldException) {
+ InvalidFieldException fieldException = (InvalidFieldException) ex.getCause();
+ result.put("field", fieldException.field())
+ .put("reason", fieldException.reason());
+ }
+
+ return Response.status(status).entity(result.toString());
+ }
+}