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; 023import static java.util.Objects.requireNonNull; 024 025import org.eclipse.aether.graph.DependencyFilter; 026import org.eclipse.aether.graph.DependencyNode; 027 028/** 029 * A dependency filter that negates another filter. 030 */ 031public final class NotDependencyFilter 032 implements DependencyFilter 033{ 034 035 private final DependencyFilter filter; 036 037 /** 038 * Creates a new filter negatint the specified filter. 039 * 040 * @param filter The filter to negate, must not be {@code null}. 041 */ 042 public NotDependencyFilter( DependencyFilter filter ) 043 { 044 this.filter = requireNonNull( filter, "dependency filter cannot be null" ); 045 } 046 047 public boolean accept( DependencyNode node, List<DependencyNode> parents ) 048 { 049 return !filter.accept( node, parents ); 050 } 051 052 @Override 053 public boolean equals( Object obj ) 054 { 055 if ( this == obj ) 056 { 057 return true; 058 } 059 060 if ( obj == null || !getClass().equals( obj.getClass() ) ) 061 { 062 return false; 063 } 064 065 NotDependencyFilter that = (NotDependencyFilter) obj; 066 067 return this.filter.equals( that.filter ); 068 } 069 070 @Override 071 public int hashCode() 072 { 073 int hash = getClass().hashCode(); 074 hash = hash * 31 + filter.hashCode(); 075 return hash; 076 } 077 078}