2 * Copyright 2005-2010 the original author or authors.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 package org.wamblee.persistence;
18 import java.io.Serializable;
21 * Represents a detachable object. It represent a reference to a persistent
22 * object. The object is detachable in that the memory footprint can be reduced
23 * by not keeping a reference to the complete java object, but only to its
24 * identify in persistent storage. This is typically the primary key in a
25 * relational database.
27 public interface Detachable<T> extends Serializable {
29 * Detaches the object.
34 * Gets the object, attaching it if needed.