1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 * 19 */ 20 package org.apache.directory.server.core.event; 21 22 23 import javax.naming.NamingException; 24 25 import org.apache.directory.server.core.entry.ServerEntry; 26 import org.apache.directory.shared.ldap.filter.ExprNode; 27 28 29 /** 30 * Tests if an entry is eligible for return by evaluating a filter expression on 31 * the candidate. The evaluation can proceed by applying the filter on the 32 * attributes of the entry itself or indices can be used for rapid evaluation. 33 * 34 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 35 * @version $Rev: 666516 $ 36 */ 37 public interface Evaluator 38 { 39 /** 40 * Evaluates a candidate to determine if a filter expression selects it. 41 * 42 * @param node the filter expression to evaluate on the candidate 43 * @param dn the normalized distinguished name of the entry being tested 44 * @param entry the entry to evaluate 45 * @return true if the filter selects the candidate false otherwise 46 * @throws javax.naming.NamingException if there is a database fault during evaluation 47 */ 48 boolean evaluate( ExprNode node, String dn, ServerEntry entry ) throws NamingException; 49 }