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.shared.ldap.filter; 021 022 023 /** 024 * Filter expression tree node representing a filter attribute value assertion 025 * for presence. 026 * 027 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 028 * @version $Revision: 746607 $ 029 */ 030 public final class PresenceNode extends LeafNode 031 { 032 /** 033 * Creates a PresenceNode object based on an attribute. 034 * 035 * @param attribute the attribute to assert the presence of 036 */ 037 public PresenceNode( String attribute ) 038 { 039 super( attribute, AssertionType.PRESENCE ); 040 } 041 042 043 /** 044 * Clone the Node 045 */ 046 @Override public ExprNode clone() 047 { 048 return super.clone(); 049 } 050 051 /** 052 * @see java.lang.Object#toString() 053 * @return A string representing the AndNode 054 */ 055 public String toString() 056 { 057 StringBuilder buf = new StringBuilder(); 058 059 buf.append( '(' ).append( getAttribute() ).append( "=*" ); 060 061 buf.append( super.toString() ); 062 063 buf.append( ')' ); 064 065 return buf.toString(); 066 } 067 }