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 */ 020package org.apache.directory.server.xdbm.search.evaluator; 021 022 023import org.apache.directory.api.ldap.model.entry.Entry; 024import org.apache.directory.api.ldap.model.filter.SimpleNode; 025import org.apache.directory.api.ldap.model.schema.AttributeType; 026import org.apache.directory.api.ldap.model.schema.LdapComparator; 027import org.apache.directory.api.ldap.model.schema.Normalizer; 028import org.apache.directory.api.ldap.model.schema.SchemaManager; 029import org.apache.directory.server.xdbm.Index; 030import org.apache.directory.server.xdbm.Store; 031import org.apache.directory.server.xdbm.search.Evaluator; 032 033 034/** 035 * An abstract evaluator to store the common fileds for the Simple node evaluators 036 * (ApproximateEvaluator, EqualityEvaluator, GreaterEqEvluator and LessEqEvluator) 037 * 038 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 039 * @version $Rev$, $Date$ 040 */ 041public abstract class LeafEvaluator<T> implements Evaluator<SimpleNode<T>> 042{ 043 /** The ExprNode to evaluate */ 044 protected final SimpleNode<T> node; 045 046 /** The backend */ 047 protected final Store db; 048 049 /** The SchemaManager instance */ 050 protected final SchemaManager schemaManager; 051 052 /** The AttributeType we will use for the evaluation */ 053 protected final AttributeType attributeType; 054 055 /** The associated normalizer */ 056 protected Normalizer normalizer; 057 058 /** The associated comparator */ 059 protected LdapComparator<? super Object> ldapComparator; 060 061 /** The index to use if any */ 062 protected Index<T, Entry, String> idx; 063 064 065 @SuppressWarnings("unchecked") 066 public LeafEvaluator( SimpleNode<T> node, Store db, SchemaManager schemaManager ) 067 throws Exception 068 { 069 this.db = db; 070 this.node = node; 071 this.schemaManager = schemaManager; 072 this.attributeType = node.getAttributeType(); 073 } 074 075 076 /** 077 * @return The AttributeType 078 */ 079 public AttributeType getAttributeType() 080 { 081 return attributeType; 082 } 083 084 085 /** 086 * @return The Normalizer associated with the AttributeType 087 */ 088 public Normalizer getNormalizer() 089 { 090 return normalizer; 091 } 092 093 094 /** 095 * @return The LdapComparator associated with the AttributeType 096 */ 097 public LdapComparator<? super Object> getComparator() 098 { 099 return ldapComparator; 100 } 101 102 103 /** 104 * @see Object#toString() 105 */ 106 public String toString() 107 { 108 StringBuilder sb = new StringBuilder(); 109 110 sb.append( node ); 111 112 return sb.toString(); 113 } 114}