/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *  
 *    http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License. 
 *  
 */
package org.apache.directory.server.schema.registries;


import java.util.Iterator;

import javax.naming.NamingException;

import org.apache.directory.shared.ldap.schema.ObjectClass;


/**
 * ObjectClass registry service interface.
 *
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 * @version $Rev$
 */
public interface ObjectClassRegistry extends SchemaObjectRegistry
{
    /**
     * Registers an ObjectClass with this registry.
     *
     * @param objectClass the objectClass to register
     * @throws NamingException if the ObjectClass is already registered or the
     * registration operation is not supported
     */
    void register( ObjectClass objectClass ) throws NamingException;


    /**
     * Looks up an objectClass by its unique Object Identifier or by name.
     *
     * @param id the object identifier or name
     * @return the ObjectClass instance for the id
     * @throws NamingException if the ObjectClass does not exist
     */
    ObjectClass lookup( String id ) throws NamingException;


    /**
     * Checks to see if an objectClass exists.
     *
     * @param id the object identifier or name
     * @return true if an objectClass definition exists for the id, false
     * otherwise
     */
    boolean hasObjectClass( String id );


    /**
     * Gets an Iterator over the ObjectClasses within this ObjectClassRegistry.
     *
     * @return an iterator over all ObjectClasses in registry
     */
    Iterator<ObjectClass> iterator();
}