001package org.apache.maven.artifact.resolver.filter;
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.apache.maven.artifact.Artifact;
023
024public class InversionArtifactFilter
025    implements ArtifactFilter
026{
027    private final ArtifactFilter toInvert;
028
029    public InversionArtifactFilter( ArtifactFilter toInvert )
030    {
031        this.toInvert = toInvert;
032    }
033
034    public boolean include( Artifact artifact )
035    {
036        return !toInvert.include( artifact );
037    }
038
039    @Override
040    public int hashCode()
041    {
042        int hash = 17;
043        hash = hash * 31 + toInvert.hashCode();
044        return hash;
045    }
046
047    @Override
048    public boolean equals( Object obj )
049    {
050        if ( this == obj )
051        {
052            return true;
053        }
054
055        if ( !( obj instanceof InversionArtifactFilter ) )
056        {
057            return false;
058        }
059
060        InversionArtifactFilter other = (InversionArtifactFilter) obj;
061
062        return toInvert.equals( other.toInvert );
063    }
064
065}