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.schema;
21
22
23 /**
24 * A class containing a SchemaObject, used by the global registries. As the hash code
25 * method of the SchemaObject class is too complex, we had to define a simplest class
26 * for this purpose, where the hash code is computed using only the SchemaObject
27 * type and its OID.
28 *
29 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
30 */
31 public class SchemaObjectWrapper
32 {
33 /** The internal schemaObject */
34 private SchemaObject schemaObject;
35
36
37 /**
38 * Creates a new instance of SchemaObjectWrapper.
39 *
40 * @param schemaObject The contained SchemaObject
41 */
42 public SchemaObjectWrapper( SchemaObject schemaObject )
43 {
44 this.schemaObject = schemaObject;
45 }
46
47
48 /**
49 * Compute the hash code for this wrapper. We only use the object type
50 * and its oid.
51 */
52 public int hashCode()
53 {
54 int h = 37;
55 h += h * 17 + schemaObject.getObjectType().getValue();
56
57 if ( schemaObject.getOid() != null )
58 {
59 h += h * 17 + schemaObject.getOid().hashCode();
60 }
61
62 return h;
63 }
64
65
66 /**
67 * @see Object#equals(Object)
68 */
69 public boolean equals( Object o )
70 {
71 if ( o == this )
72 {
73 return true;
74 }
75
76 if ( !( o instanceof SchemaObjectWrapper ) )
77 {
78 return false;
79 }
80
81 SchemaObject that = ( ( SchemaObjectWrapper ) o ).get();
82 SchemaObject current = get();
83
84 // Ultimately, that has to be true, regardless of the OID value
85 if ( that.getObjectType() != current.getObjectType() )
86 {
87 return false;
88 }
89
90 // If both OID are null, instances are equals
91 if ( that.getOid() == null )
92 {
93 return ( current.getOid() == null );
94 }
95
96 // The that'oid will never be null, we don't really care if current.oid is null here.
97 return that.getOid().equals( current.getOid() );
98 }
99
100
101 /**
102 * @return The interned SchemaObject
103 */
104 public SchemaObject get()
105 {
106 return schemaObject;
107 }
108
109
110 /**
111 * @see Object#toString()
112 */
113 public String toString()
114 {
115 return "<" + schemaObject.getObjectType() + "," + schemaObject.getOid() + ">";
116 }
117 }