org.onlab.rest.JsonBodyWriter Maven / Gradle / Ivy
/*
* Copyright 2015-present Open Networking Foundation
*
* 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.onlab.rest;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Provider;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
/**
* JAX-RS Response message body writer.
*/
@Provider
@Produces("application/json")
public class JsonBodyWriter implements MessageBodyWriter {
private ObjectMapper mapper = new ObjectMapper();
@Override
public boolean isWriteable(Class type, Type genericType,
Annotation[] annotations, MediaType mediaType) {
return type == ObjectNode.class;
}
@Override
public long getSize(ObjectNode node, Class type, Type genericType,
Annotation[] annotations, MediaType mediaType) {
return -1;
}
@Override
public void writeTo(ObjectNode node, Class type, Type genericType,
Annotation[] annotations, MediaType mediaType,
MultivaluedMap httpHeaders,
OutputStream entityStream) throws IOException {
mapper.writer().writeValue(entityStream, node);
entityStream.flush();
}
}