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.List; 022 023import org.eclipse.aether.graph.DependencyFilter; 024import org.eclipse.aether.graph.DependencyNode; 025 026import static java.util.Objects.requireNonNull; 027 028/** 029 * A dependency filter that negates another filter. 030 */ 031public final class NotDependencyFilter implements DependencyFilter { 032 033 private final DependencyFilter filter; 034 035 /** 036 * Creates a new filter negatint the specified filter. 037 * 038 * @param filter The filter to negate, must not be {@code null}. 039 */ 040 public NotDependencyFilter(DependencyFilter filter) { 041 this.filter = requireNonNull(filter, "dependency filter cannot be null"); 042 } 043 044 public boolean accept(DependencyNode node, List<DependencyNode> parents) { 045 return !filter.accept(node, parents); 046 } 047 048 @Override 049 public boolean equals(Object obj) { 050 if (this == obj) { 051 return true; 052 } 053 054 if (obj == null || !getClass().equals(obj.getClass())) { 055 return false; 056 } 057 058 NotDependencyFilter that = (NotDependencyFilter) obj; 059 060 return this.filter.equals(that.filter); 061 } 062 063 @Override 064 public int hashCode() { 065 int hash = getClass().hashCode(); 066 hash = hash * 31 + filter.hashCode(); 067 return hash; 068 } 069}