001/*
002 * (C) Copyright 2015 Nuxeo SA (http://nuxeo.com/) and contributors.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl-2.1.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     Nicolas Chapurlat <nchapurlat@nuxeo.com>
016 */
017
018package org.nuxeo.ecm.core.io.marshallers.json;
019
020import java.io.IOException;
021import java.io.OutputStream;
022import java.io.Writer;
023
024import org.apache.commons.io.output.WriterOutputStream;
025import org.codehaus.jackson.JsonGenerator;
026
027/**
028 * This {@link OutputStream} is a technical wrapper for {@link JsonGenerator}. It's used to broadcast a
029 * {@link JsonGenerator} between marshallers.
030 * <p>
031 * take a look at {@link AbstractJsonWriter#getGenerator(OutputStream, boolean)} to understand the mechanism.
032 * </p>
033 *
034 * @since 7.2
035 */
036public class OutputStreamWithJsonWriter extends OutputStream {
037
038    private OutputStream out;
039
040    private JsonGenerator jsonGenerator;
041
042    public OutputStreamWithJsonWriter(JsonGenerator jsonGenerator) {
043        super();
044        this.jsonGenerator = jsonGenerator;
045        Object outputTarget = jsonGenerator.getOutputTarget();
046        if (outputTarget instanceof OutputStream) {
047            out = (OutputStream) outputTarget;
048        } else if (outputTarget instanceof Writer) {
049            out = new WriterOutputStream((Writer) outputTarget);
050        }
051    }
052
053    public JsonGenerator getJsonGenerator() {
054        return jsonGenerator;
055    }
056
057    @Override
058    public void write(int b) throws IOException {
059        out.write(b);
060    }
061
062    @Override
063    public void write(byte[] b) throws IOException {
064        out.write(b);
065    }
066
067    @Override
068    public void write(byte[] b, int off, int len) throws IOException {
069        out.write(b, off, len);
070    }
071
072    @Override
073    public void flush() throws IOException {
074        out.flush();
075    }
076
077    @Override
078    public void close() throws IOException {
079        out.close();
080    }
081
082}