001package org.eclipse.aether.util.graph.traverser;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 * 
012 *  http://www.apache.org/licenses/LICENSE-2.0
013 * 
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import org.eclipse.aether.artifact.ArtifactProperties;
023import org.eclipse.aether.collection.DependencyCollectionContext;
024import org.eclipse.aether.collection.DependencyTraverser;
025import org.eclipse.aether.graph.Dependency;
026
027/**
028 * A dependency traverser that excludes the dependencies of fat artifacts from the traversal. Fat artifacts are
029 * artifacts that have the property {@link org.eclipse.aether.artifact.ArtifactProperties#INCLUDES_DEPENDENCIES} set to
030 * {@code true}.
031 * 
032 * @see org.eclipse.aether.artifact.Artifact#getProperties()
033 */
034public final class FatArtifactTraverser
035    implements DependencyTraverser
036{
037
038    /**
039     * Creates a new instance of this dependency traverser.
040     */
041    public FatArtifactTraverser()
042    {
043    }
044
045    public boolean traverseDependency( Dependency dependency )
046    {
047        String prop = dependency.getArtifact().getProperty( ArtifactProperties.INCLUDES_DEPENDENCIES, "" );
048        return !Boolean.parseBoolean( prop );
049    }
050
051    public DependencyTraverser deriveChildTraverser( DependencyCollectionContext context )
052    {
053        return this;
054    }
055
056    @Override
057    public boolean equals( Object obj )
058    {
059        if ( this == obj )
060        {
061            return true;
062        }
063        else if ( null == obj || !getClass().equals( obj.getClass() ) )
064        {
065            return false;
066        }
067        return true;
068    }
069
070    @Override
071    public int hashCode()
072    {
073        return getClass().hashCode();
074    }
075
076}