1 /*
2 * Copyright 2006-2007 the original author or authors.
3 *
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
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
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.
15 */
16 package org.springframework.batch.core.step.item;
17
18 /**
19 * Interface for defining keys to uniquely identify items.
20 * this can be useful if the item itself cannot be modified to
21 * properly override equals.
22 *
23 * @author Dave Syer
24 *
25 */
26 public interface KeyGenerator {
27
28 Object getKey(Object item);
29
30 }