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.api.ldap.model.filter;
21
22
23 import org.apache.directory.api.ldap.model.schema.AttributeType;
24
25
26 /**
27 * Filter expression tree node representing a filter attribute value assertion
28 * for presence.
29 *
30 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
31 */
32 public final class PresenceNode extends LeafNode
33 {
34 /**
35 * Creates a PresenceNode object based on an attribute.
36 *
37 * @param attributeType the attributeType to assert the presence of
38 */
39 public PresenceNode( AttributeType attributeType )
40 {
41 super( attributeType, AssertionType.PRESENCE );
42 }
43
44
45 /**
46 * Creates a PresenceNode object based on an attribute.
47 *
48 * @param attribute the attribute to assert the presence of
49 */
50 public PresenceNode( String attribute )
51 {
52 super( attribute, AssertionType.PRESENCE );
53 }
54
55
56 /**
57 * @see java.lang.Object#toString()
58 * @return A string representing the AndNode
59 */
60 @Override
61 public String toString()
62 {
63 StringBuilder buf = new StringBuilder();
64
65 buf.append( '(' );
66
67 if ( attributeType != null )
68 {
69 buf.append( attributeType.getName() );
70 }
71 else
72 {
73 buf.append( attribute );
74 }
75
76 buf.append( "=*" );
77
78 buf.append( super.toString() );
79
80 buf.append( ')' );
81
82 return buf.toString();
83 }
84 }