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package org.apache.maven.toolchain.merge;
/*
* 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 java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import org.apache.maven.toolchain.model.PersistedToolchains;
import org.apache.maven.toolchain.model.ToolchainModel;
import org.codehaus.plexus.util.xml.Xpp3Dom;
/**
*
* @author Robert Scholte
* @since 3.2.4
*/
public class MavenToolchainMerger
{
public void merge( PersistedToolchains dominant, PersistedToolchains recessive, String recessiveSourceLevel )
{
if ( dominant == null || recessive == null )
{
return;
}
recessive.setSourceLevel( recessiveSourceLevel );
shallowMerge( dominant.getToolchains(), recessive.getToolchains(), recessiveSourceLevel );
}
private void shallowMerge( List<ToolchainModel> dominant, List<ToolchainModel> recessive,
String recessiveSourceLevel )
{
Map<Object, ToolchainModel> merged = new LinkedHashMap<Object, ToolchainModel>();
for ( ToolchainModel dominantModel : dominant )
{
Object key = getToolchainModelKey( dominantModel );
merged.put( key, dominantModel );
}
for ( ToolchainModel recessiveModel : recessive )
{
Object key = getToolchainModelKey( recessiveModel );
ToolchainModel dominantModel = merged.get( key );
if ( dominantModel == null )
{
recessiveModel.setSourceLevel( recessiveSourceLevel );
dominant.add( recessiveModel );
}
else
{
mergeToolchainModel_Configuration( dominantModel, recessiveModel );
}
}
}
protected void mergeToolchainModel_Configuration( ToolchainModel target,
ToolchainModel source )
{
Xpp3Dom src = (Xpp3Dom) source.getConfiguration();
if ( src != null )
{
Xpp3Dom tgt = (Xpp3Dom) target.getConfiguration();
if ( tgt == null )
{
tgt = Xpp3Dom.mergeXpp3Dom( new Xpp3Dom( src ), tgt );
}
else
{
tgt = Xpp3Dom.mergeXpp3Dom( tgt, src );
}
target.setConfiguration( tgt );
}
}
protected Object getToolchainModelKey( ToolchainModel model )
{
return model;
}
}
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