001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one
003 *  or more contributor license agreements.  See the NOTICE file
004 *  distributed with this work for additional information
005 *  regarding copyright ownership.  The ASF licenses this file
006 *  to you under the Apache License, Version 2.0 (the
007 *  "License"); you may not use this file except in compliance
008 *  with the License.  You may obtain a copy of the License at
009 *
010 *        http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *  Unless required by applicable law or agreed to in writing,
013 *  software distributed under the License is distributed on an
014 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *  KIND, either express or implied.  See the License for the
016 *  specific language governing permissions and limitations
017 *  under the License.
018 */
019
020package org.apache.isis.core.runtime.snapshot;
021
022import java.io.CharArrayWriter;
023import java.io.OutputStream;
024import java.io.OutputStreamWriter;
025import java.io.Writer;
026
027import javax.xml.transform.Result;
028import javax.xml.transform.Source;
029import javax.xml.transform.Transformer;
030import javax.xml.transform.TransformerConfigurationException;
031import javax.xml.transform.TransformerFactory;
032import javax.xml.transform.dom.DOMSource;
033import javax.xml.transform.stream.StreamResult;
034
035import org.w3c.dom.Element;
036
037public class DomSerializerJaxp implements DomSerializer {
038
039    private final TransformerFactory transformerFactory;
040    private final Transformer newTransformer;
041
042    public DomSerializerJaxp() throws TransformerConfigurationException {
043        this.transformerFactory = TransformerFactory.newInstance();
044        this.newTransformer = transformerFactory.newTransformer();
045    }
046
047    @Override
048    public String serialize(final Element domElement) {
049        final CharArrayWriter caw = new CharArrayWriter();
050        try {
051            serializeTo(domElement, caw);
052            return caw.toString();
053        } catch (final Exception e) {
054            return null;
055        }
056    }
057
058    @Override
059    public void serializeTo(final Element domElement, final OutputStream os) throws Exception {
060        final OutputStreamWriter osw = new OutputStreamWriter(os);
061        serializeTo(domElement, osw);
062    }
063
064    @Override
065    public void serializeTo(final Element domElement, final Writer writer) throws Exception {
066        final Source source = new DOMSource(domElement);
067        final Result result = new StreamResult(writer);
068        newTransformer.transform(source, result);
069    }
070
071}