001package org.eclipse.aether.util.graph.selector;
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.collection.DependencyCollectionContext;
023import org.eclipse.aether.collection.DependencySelector;
024import org.eclipse.aether.graph.Dependency;
025
026/**
027 * A dependency selector that always includes or excludes dependencies.
028 */
029public final class StaticDependencySelector
030    implements DependencySelector
031{
032
033    private final boolean select;
034
035    /**
036     * Creates a new selector with the specified selection behavior.
037     * 
038     * @param select {@code true} to select all dependencies, {@code false} to exclude all dependencies.
039     */
040    public StaticDependencySelector( boolean select )
041    {
042        this.select = select;
043    }
044
045    public boolean selectDependency( Dependency dependency )
046    {
047        return select;
048    }
049
050    public DependencySelector deriveChildSelector( DependencyCollectionContext context )
051    {
052        return this;
053    }
054
055    @Override
056    public boolean equals( Object obj )
057    {
058        if ( this == obj )
059        {
060            return true;
061        }
062        else if ( null == obj || !getClass().equals( obj.getClass() ) )
063        {
064            return false;
065        }
066
067        StaticDependencySelector that = (StaticDependencySelector) obj;
068        return select == that.select;
069    }
070
071    @Override
072    public int hashCode()
073    {
074        int hash = getClass().hashCode();
075        hash = hash * 31 + ( select ? 1 : 0 );
076        return hash;
077    }
078
079}