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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;
17  
18  /**
19   * Interface for obtaining the next {@link JobParameters} in a sequence.
20   * 
21   * @author Dave Syer
22   * @author Lucas Ward
23   * @since 2.0
24   */
25  public interface JobParametersIncrementer {
26  
27  	/**
28  	 * Increment the provided parameters. If the input is empty, then this
29  	 * should return a bootstrap or initial value to be used on the first
30  	 * instance of a job.
31  	 * 
32  	 * @param parameters the last value used
33  	 * @return the next value to use
34  	 */
35  	JobParameters getNext(JobParameters parameters);
36  
37  }