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 * 019 */ 020 package org.apache.directory.server.xdbm.search.impl; 021 022 023 import org.apache.directory.shared.ldap.entry.ServerEntry; 024 import org.apache.directory.shared.ldap.filter.NotNode; 025 import org.apache.directory.shared.ldap.filter.ExprNode; 026 import org.apache.directory.server.xdbm.IndexEntry; 027 import org.apache.directory.server.xdbm.search.Evaluator; 028 029 030 /** 031 * An Evaluator for logical negation (NOT) expressions. 032 * 033 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 034 * @version $$Rev$$ 035 */ 036 public class NotEvaluator<ID> implements Evaluator<NotNode, ServerEntry, ID> 037 { 038 private final NotNode node; 039 private final Evaluator<? extends ExprNode, ServerEntry, ID> childEvaluator; 040 041 042 public NotEvaluator( NotNode node, Evaluator<? extends ExprNode, ServerEntry, ID> childEvaluator ) 043 { 044 this.node = node; 045 this.childEvaluator = childEvaluator; 046 } 047 048 049 public boolean evaluateId( ID id ) throws Exception 050 { 051 return !childEvaluator.evaluateId( id ); 052 } 053 054 055 public boolean evaluateEntry( ServerEntry entry ) throws Exception 056 { 057 return !childEvaluator.evaluateEntry( entry ); 058 } 059 060 061 public boolean evaluate( IndexEntry<?, ServerEntry, ID> indexEntry ) throws Exception 062 { 063 return !childEvaluator.evaluate( indexEntry ); 064 } 065 066 067 public NotNode getExpression() 068 { 069 return node; 070 } 071 }