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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  
17  package org.springframework.batch.sample.domain.trade.internal;
18  
19  import org.springframework.batch.item.ItemProcessor;
20  import org.springframework.batch.item.validator.ValidationException;
21  import org.springframework.batch.sample.domain.trade.Trade;
22  
23  /**
24   * Processes the Trade - throwing validation errors if necessary.
25   */
26  public class TradeProcessor implements ItemProcessor<Trade, Trade> {
27  
28  	private int failure = -1;
29  
30  	private int index = 0;
31  	
32  	private Trade failedItem = null;
33  
34  	/**
35  	 * Public setter for the the index on which failure should occur.
36  	 * 
37  	 * @param failure the failure to set
38  	 */
39  	public void setValidationFailure(int failure) {
40  		this.failure = failure;
41  	}
42  
43  	public Trade process(Trade item) throws Exception {
44  		if ((failedItem == null && index++ == failure) || (failedItem != null && failedItem.equals(item))) {
45  			failedItem = item;
46  			throw new ValidationException("Some bad data for " + failedItem);
47  		}
48  		return item;
49  	}
50  }