001package org.eclipse.aether.util.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 java.util.Collection; 023import java.util.Collections; 024import java.util.LinkedHashSet; 025import java.util.List; 026import java.util.Set; 027 028import org.eclipse.aether.graph.DependencyFilter; 029import org.eclipse.aether.graph.DependencyNode; 030 031/** 032 * A dependency filter that combines zero or more other filters using a logical {@code OR}. 033 */ 034public final class OrDependencyFilter 035 implements DependencyFilter 036{ 037 038 private final Set<DependencyFilter> filters = new LinkedHashSet<DependencyFilter>(); 039 040 /** 041 * Creates a new filter from the specified filters. 042 * 043 * @param filters The filters to combine, may be {@code null}. 044 */ 045 public OrDependencyFilter( DependencyFilter... filters ) 046 { 047 if ( filters != null ) 048 { 049 Collections.addAll( this.filters, filters ); 050 } 051 } 052 053 /** 054 * Creates a new filter from the specified filters. 055 * 056 * @param filters The filters to combine, may be {@code null}. 057 */ 058 public OrDependencyFilter( Collection<DependencyFilter> filters ) 059 { 060 if ( filters != null ) 061 { 062 this.filters.addAll( filters ); 063 } 064 } 065 066 /** 067 * Creates a new filter from the specified filters. 068 * 069 * @param filter1 The first filter to combine, may be {@code null}. 070 * @param filter2 The first filter to combine, may be {@code null}. 071 * @return The combined filter or {@code null} if both filter were {@code null}. 072 */ 073 public static DependencyFilter newInstance( DependencyFilter filter1, DependencyFilter filter2 ) 074 { 075 if ( filter1 == null ) 076 { 077 return filter2; 078 } 079 else if ( filter2 == null ) 080 { 081 return filter1; 082 } 083 return new OrDependencyFilter( filter1, filter2 ); 084 } 085 086 public boolean accept( DependencyNode node, List<DependencyNode> parents ) 087 { 088 for ( DependencyFilter filter : filters ) 089 { 090 if ( filter.accept( node, parents ) ) 091 { 092 return true; 093 } 094 } 095 return false; 096 } 097 098 @Override 099 public boolean equals( Object obj ) 100 { 101 if ( this == obj ) 102 { 103 return true; 104 } 105 106 if ( obj == null || !getClass().equals( obj.getClass() ) ) 107 { 108 return false; 109 } 110 111 OrDependencyFilter that = (OrDependencyFilter) obj; 112 113 return this.filters.equals( that.filters ); 114 } 115 116 @Override 117 public int hashCode() 118 { 119 int hash = getClass().hashCode(); 120 hash = hash * 31 + filters.hashCode(); 121 return hash; 122 } 123 124}