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.support;
18
19 import java.io.IOException;
20 import java.io.Writer;
21
22 import org.springframework.batch.item.file.FlatFileHeaderCallback;
23 import org.springframework.batch.item.file.FlatFileItemReader;
24 import org.springframework.batch.item.file.FlatFileItemWriter;
25 import org.springframework.batch.item.file.LineCallbackHandler;
26 import org.springframework.util.Assert;
27
28 /**
29 * Designed to be registered with both {@link FlatFileItemReader} and
30 * {@link FlatFileItemWriter} and copy header line from input file to output
31 * file.
32 */
33 public class HeaderCopyCallback implements LineCallbackHandler, FlatFileHeaderCallback {
34
35 private String header = "";
36
37 public void handleLine(String line) {
38 Assert.notNull(line);
39 this.header = line;
40 }
41
42 public void writeHeader(Writer writer) throws IOException {
43 writer.write("header from input: " + header);
44
45 }
46
47 }