package org.apache.maven.index.search.grouping;
/*
* 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.Comparator;
import java.util.Map;
import org.apache.maven.index.ArtifactInfo;
import org.apache.maven.index.ArtifactInfoGroup;
import org.apache.maven.index.Grouping;
/**
* An abstract {@link Grouping} implementation.
*
* @author Tamas Cservenak
*/
public abstract class AbstractGrouping
implements Grouping
{
private Comparator<ArtifactInfo> comparator;
public AbstractGrouping()
{
this( ArtifactInfo.VERSION_COMPARATOR );
}
public AbstractGrouping( Comparator<ArtifactInfo> comparator )
{
super();
this.comparator = comparator;
}
public boolean addArtifactInfo( Map<String, ArtifactInfoGroup> result, ArtifactInfo artifactInfo )
{
String key = getGroupKey( artifactInfo );
ArtifactInfoGroup group = result.get( key );
if ( group == null )
{
group = new ArtifactInfoGroup( key, comparator );
result.put( key, group );
}
return group.addArtifactInfo( artifactInfo );
}
protected abstract String getGroupKey( ArtifactInfo artifactInfo );
}