001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.eclipse.aether.util.filter; 020 021import java.util.Collection; 022import java.util.Collections; 023import java.util.LinkedHashSet; 024import java.util.List; 025import java.util.Set; 026 027import org.eclipse.aether.graph.DependencyFilter; 028import org.eclipse.aether.graph.DependencyNode; 029 030/** 031 * A dependency filter that combines zero or more other filters using a logical {@code OR}. 032 */ 033public final class OrDependencyFilter implements DependencyFilter { 034 035 private final Set<DependencyFilter> filters = new LinkedHashSet<>(); 036 037 /** 038 * Creates a new filter from the specified filters. 039 * 040 * @param filters The filters to combine, may be {@code null}. 041 */ 042 public OrDependencyFilter(DependencyFilter... filters) { 043 if (filters != null) { 044 Collections.addAll(this.filters, filters); 045 } 046 } 047 048 /** 049 * Creates a new filter from the specified filters. 050 * 051 * @param filters The filters to combine, may be {@code null}. 052 */ 053 public OrDependencyFilter(Collection<DependencyFilter> filters) { 054 if (filters != null) { 055 this.filters.addAll(filters); 056 } 057 } 058 059 /** 060 * Creates a new filter from the specified filters. 061 * 062 * @param filter1 The first filter to combine, may be {@code null}. 063 * @param filter2 The first filter to combine, may be {@code null}. 064 * @return The combined filter or {@code null} if both filter were {@code null}. 065 */ 066 public static DependencyFilter newInstance(DependencyFilter filter1, DependencyFilter filter2) { 067 if (filter1 == null) { 068 return filter2; 069 } else if (filter2 == null) { 070 return filter1; 071 } 072 return new OrDependencyFilter(filter1, filter2); 073 } 074 075 public boolean accept(DependencyNode node, List<DependencyNode> parents) { 076 for (DependencyFilter filter : filters) { 077 if (filter.accept(node, parents)) { 078 return true; 079 } 080 } 081 return false; 082 } 083 084 @Override 085 public boolean equals(Object obj) { 086 if (this == obj) { 087 return true; 088 } 089 090 if (obj == null || !getClass().equals(obj.getClass())) { 091 return false; 092 } 093 094 OrDependencyFilter that = (OrDependencyFilter) obj; 095 096 return this.filters.equals(that.filters); 097 } 098 099 @Override 100 public int hashCode() { 101 int hash = getClass().hashCode(); 102 hash = hash * 31 + filters.hashCode(); 103 return hash; 104 } 105}