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.api.ldap.model.filter; 021 022 023import org.apache.directory.api.ldap.model.schema.AttributeType; 024 025 026/** 027 * Filter expression tree node representing a filter attribute value assertion 028 * for presence. 029 * 030 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 031 */ 032public final class PresenceNode extends LeafNode 033{ 034 /** 035 * Creates a PresenceNode object based on an attribute. 036 * 037 * @param attributeType the attributeType to assert the presence of 038 */ 039 public PresenceNode( AttributeType attributeType ) 040 { 041 super( attributeType, AssertionType.PRESENCE ); 042 } 043 044 045 /** 046 * Creates a PresenceNode object based on an attribute. 047 * 048 * @param attribute the attribute to assert the presence of 049 */ 050 public PresenceNode( String attribute ) 051 { 052 super( attribute, AssertionType.PRESENCE ); 053 } 054 055 056 /** 057 * @see java.lang.Object#toString() 058 * @return A string representing the AndNode 059 */ 060 @Override 061 public String toString() 062 { 063 StringBuilder buf = new StringBuilder(); 064 065 buf.append( '(' ); 066 067 if ( attributeType != null ) 068 { 069 buf.append( attributeType.getName() ); 070 } 071 else 072 { 073 buf.append( attribute ); 074 } 075 076 buf.append( "=*" ); 077 078 buf.append( super.toString() ); 079 080 buf.append( ')' ); 081 082 return buf.toString(); 083 } 084}