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.List; 023 024import org.eclipse.aether.graph.DependencyFilter; 025import org.eclipse.aether.graph.DependencyNode; 026 027/** 028 * A dependency filter that negates another filter. 029 */ 030public final class NotDependencyFilter 031 implements DependencyFilter 032{ 033 034 private final DependencyFilter filter; 035 036 /** 037 * Creates a new filter negatint the specified filter. 038 * 039 * @param filter The filter to negate, must not be {@code null}. 040 */ 041 public NotDependencyFilter( DependencyFilter filter ) 042 { 043 if ( filter == null ) 044 { 045 throw new IllegalArgumentException( "no filter specified" ); 046 } 047 this.filter = filter; 048 } 049 050 public boolean accept( DependencyNode node, List<DependencyNode> parents ) 051 { 052 return !filter.accept( node, parents ); 053 } 054 055 @Override 056 public boolean equals( Object obj ) 057 { 058 if ( this == obj ) 059 { 060 return true; 061 } 062 063 if ( obj == null || !getClass().equals( obj.getClass() ) ) 064 { 065 return false; 066 } 067 068 NotDependencyFilter that = (NotDependencyFilter) obj; 069 070 return this.filter.equals( that.filter ); 071 } 072 073 @Override 074 public int hashCode() 075 { 076 int hash = getClass().hashCode(); 077 hash = hash * 31 + filter.hashCode(); 078 return hash; 079 } 080 081}