| /* |
| * 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.lenya.transaction; |
| |
| /** |
| * Identity map. |
| * |
| * @version $Id$ |
| */ |
| public interface IdentityMap { |
| |
| /** |
| * Retrieve an instance from the map. If no instance exists |
| * for the given key, the factory is used to build one. |
| * @param factory The factory that produces the identifable. |
| * @param key The key for the identifiable. |
| * @return An identifiable. |
| */ |
| Object get(IdentifiableFactory factory, String key); |
| |
| /** |
| * Returns the unit of work. This maybe <code>null</code> if the identity map is not involved |
| * in a transaction. |
| * @return The unit of work. |
| */ |
| UnitOfWork getUnitOfWork(); |
| |
| /** |
| * @param unit The unit of work to use. |
| */ |
| void setUnitOfWork(UnitOfWork unit); |
| |
| /** |
| * @return All objects in this map. |
| */ |
| Object[] getObjects(); |
| |
| } |