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ChangeRecorderXML.java
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ChangeRecorderXML.java
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package org.codehaus.mojo.versions.recording;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Objects;
import org.w3c.dom.DOMException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
/**
* A recorder of version updates.
*/
public class ChangeRecorderXML implements ChangeRecorder
{
/**
* The XML namespace used for serialized changes.
*/
public static final String CHANGES_NAMESPACE = "http://www.mojohaus.org/versions-maven-plugin/schema/updates/1.0";
private final Document document;
private final Element root;
/**
* Creates a new instance
*/
public ChangeRecorderXML()
{
try
{
final DocumentBuilderFactory documentBuilders = DocumentBuilderFactory.newInstance();
final DocumentBuilder documentBuilder = documentBuilders.newDocumentBuilder();
document = documentBuilder.newDocument();
root = document.createElementNS( CHANGES_NAMESPACE, "updates" );
document.appendChild( root );
}
catch ( final ParserConfigurationException | DOMException e )
{
throw new IllegalStateException( e );
}
}
@Override
public final void recordUpdate( final String kind, final String groupId, final String artifactId,
final String oldVersion, final String newVersion )
{
Objects.requireNonNull( kind, "kind" );
Objects.requireNonNull( groupId, "groupId" );
Objects.requireNonNull( artifactId, "artifactId" );
Objects.requireNonNull( oldVersion, "oldVersion" );
Objects.requireNonNull( newVersion, "newVersion" );
final Element update = this.document.createElementNS( CHANGES_NAMESPACE, "update" );
update.setAttribute( "kind", kind );
update.setAttribute( "groupId", groupId );
update.setAttribute( "artifactId", artifactId );
update.setAttribute( "oldVersion", oldVersion );
update.setAttribute( "newVersion", newVersion );
this.root.appendChild( update );
}
@Override
public final void serialize( final OutputStream outputStream ) throws IOException
{
try
{
final Transformer transformer = TransformerFactory.newInstance().newTransformer();
final Source source = new DOMSource( this.document );
transformer.transform( source, new StreamResult( outputStream ) );
outputStream.flush();
}
catch ( final TransformerException ex )
{
throw new IOException( ex );
}
}
}