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.schema;
021    
022    
023    /**
024     * A class containing a SchemaObject, used by the global registries. As the hash code
025     * method of the SchemaObjetc class is too complex, we had to define a simplest class
026     * for this purpose, where the hash code is computed using only the SchemaObject
027     * type and its OID.
028     *
029     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
030     * @version $Rev$, $Date$
031     */
032    public class SchemaObjectWrapper
033    {
034        /** The internal schemaObject */
035        private SchemaObject schemaObject;
036    
037    
038        /**
039         * Creates a new instance of SchemaObjectWrapper.
040         *
041         * @param schemaObject The contained SchemaObject
042         */
043        public SchemaObjectWrapper( SchemaObject schemaObject )
044        {
045            this.schemaObject = schemaObject;
046        }
047    
048    
049        /**
050         * Compute the hash code for this wrapper. We only use the object type
051         * and its oid.
052         */
053        public int hashCode()
054        {
055            int h = 37;
056            h += h * 17 + schemaObject.getObjectType().getValue();
057            h += h * 17 + schemaObject.getOid().hashCode();
058    
059            return h;
060        }
061    
062    
063        /**
064         * @see Object#equals(Object)
065         */
066        public boolean equals( Object o )
067        {
068            if ( o == this )
069            {
070                return true;
071            }
072    
073            if ( !( o instanceof SchemaObjectWrapper ) )
074            {
075                return false;
076            }
077    
078            SchemaObject that = ( ( SchemaObjectWrapper ) o ).get();
079            SchemaObject current = get();
080    
081            return ( that.getOid().equals( current.getOid() ) && ( that.getObjectType() == current.getObjectType() ) );
082        }
083    
084    
085        /**
086         *  @return The interned SchemaObject
087         */
088        public SchemaObject get()
089        {
090            return schemaObject;
091        }
092    
093    
094        /**
095         * @see Object#toString()
096         */
097        public String toString()
098        {
099            return "<" + schemaObject.getObjectType() + "," + schemaObject.getOid() + ">";
100        }
101    }