001/*
002 * (C) Copyright 2011 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     matic
018 */
019package org.nuxeo.ecm.automation.jaxrs.io;
020
021import java.io.IOException;
022import java.io.OutputStream;
023import java.lang.annotation.Annotation;
024import java.lang.reflect.Type;
025
026import javax.ws.rs.Produces;
027import javax.ws.rs.WebApplicationException;
028import javax.ws.rs.core.Context;
029import javax.ws.rs.core.MediaType;
030import javax.ws.rs.core.MultivaluedMap;
031import javax.ws.rs.ext.MessageBodyWriter;
032import javax.ws.rs.ext.Provider;
033
034import com.fasterxml.jackson.core.JsonEncoding;
035import com.fasterxml.jackson.core.JsonFactory;
036import com.fasterxml.jackson.core.JsonGenerator;
037import com.fasterxml.jackson.databind.JsonNode;
038
039/**
040 * @author bstefanescu
041 */
042@Provider
043@Produces(MediaType.APPLICATION_JSON)
044public class JsonTreeWriter implements MessageBodyWriter<JsonNode> {
045
046    @Context
047    JsonFactory factory;
048
049    @Override
050    public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
051        return JsonNode.class.isAssignableFrom(type);
052    }
053
054    @Override
055    public long getSize(JsonNode t, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
056        return -1;
057    }
058
059    @Override
060    public void writeTo(JsonNode t, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType,
061            MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream) throws IOException,
062            WebApplicationException {
063        try (JsonGenerator jg = factory.createGenerator(entityStream, JsonEncoding.UTF8)) {
064            jg.writeTree(t);
065        }
066    }
067
068}