Example usage for org.springframework.batch.item.file.mapping PassThroughFieldSetMapper PassThroughFieldSetMapper

Introduction

In this page you can find the example usage for org.springframework.batch.item.file.mapping PassThroughFieldSetMapper PassThroughFieldSetMapper.

Prototype

PassThroughFieldSetMapper

Source Link

Usage

From source file:de.langmi.spring.batch.examples.readers.file.csv.CsvFlatFileItemReaderTest.java

/**
 * Test should read succesfully.//w  w w  .j a  va2 s.c o  m
 *
 * @throws Exception 
 */
@Test
public void testSuccessfulReading() throws Exception {
    // init linetokenizer
    DelimitedLineTokenizer lineTokenizer = new DelimitedLineTokenizer();
    lineTokenizer.setNames(new String[] { "id", "value" });
    // init linemapper
    DefaultLineMapper<FieldSet> lineMapper = new DefaultLineMapper<FieldSet>();
    lineMapper.setLineTokenizer(lineTokenizer);
    lineMapper.setFieldSetMapper(new PassThroughFieldSetMapper());
    // init reader
    reader.setLineMapper(lineMapper);
    reader.setResource(new FileSystemResource(INPUT_FILE));
    // open, provide "mock" ExecutionContext
    reader.open(MetaDataInstanceFactory.createStepExecution().getExecutionContext());
    // read
    try {
        int count = 0;
        FieldSet line;
        while ((line = reader.read()) != null) {
            // really test for the fieldSet names and values
            assertEquals("id", line.getNames()[0]);
            assertEquals(String.valueOf(count), line.getValues()[0]);
            assertEquals("value", line.getNames()[1]);
            // csv contains entry like '0,foo0'
            assertEquals("foo" + String.valueOf(count), line.getValues()[1]);
            count++;
        }
        assertEquals(EXPECTED_COUNT, count);
    } catch (Exception e) {
        throw e;
    } finally {
        reader.close();
    }
}

---

From source file:com.springsource.html5expense.config.BatchConfig.java

@Bean
@Scope("step")//  w  w  w .j a  v  a2  s.  co  m
public FlatFileItemReader reader(@Value("#{jobParameters[file]}") String resource) {

    File f = new File(this.batchFileDirectory, resource + ".csv");

    DelimitedLineTokenizer del = new DelimitedLineTokenizer();
    del.setNames("date,amount,category,merchant".split(","));
    del.setDelimiter(DelimitedLineTokenizer.DELIMITER_COMMA);

    DefaultLineMapper<FieldSet> defaultLineMapper = new DefaultLineMapper<FieldSet>();
    defaultLineMapper.setLineTokenizer(del);
    defaultLineMapper.setFieldSetMapper(new PassThroughFieldSetMapper());
    defaultLineMapper.afterPropertiesSet();

    FlatFileItemReader<FieldSet> fileItemReader = new FlatFileItemReader<FieldSet>();
    fileItemReader.setLineMapper(defaultLineMapper);
    fileItemReader.setResource(new FileSystemResource(f));

    return fileItemReader;
}

---

From source file:org.springframework.batch.admin.sample.LeadRandomizer.java

@Test
public void testLeads() throws Exception {

    FlatFileItemReader<FieldSet> reader = new FlatFileItemReader<FieldSet>();
    reader.setResource(new ClassPathResource("/data/test.txt"));
    DefaultLineMapper<FieldSet> lineMapper = new DefaultLineMapper<FieldSet>();
    lineMapper.setLineTokenizer(new DelimitedLineTokenizer());
    lineMapper.setFieldSetMapper(new PassThroughFieldSetMapper());
    reader.setLinesToSkip(1);//from  w w w  . j a va  2s. c o  m
    final List<String> headers = new ArrayList<String>();
    reader.setSkippedLinesCallback(new LineCallbackHandler() {
        public void handleLine(String line) {
            headers.add(line);
        }
    });
    reader.setLineMapper(lineMapper);
    reader.open(new ExecutionContext());

    List<FieldSet> list = new ArrayList<FieldSet>();
    FieldSet item = reader.read();
    while (item != null) {
        list.add(item);
        item = reader.read();
    }
    assertEquals(7, list.size());

    FlatFileItemWriter<FieldSet> writer = new FlatFileItemWriter<FieldSet>();
    FileSystemResource resource = new FileSystemResource("target/output/output.txt");
    FileUtils.deleteQuietly(resource.getFile());
    writer.setResource(resource);
    writer.setHeaderCallback(new FlatFileHeaderCallback() {
        public void writeHeader(Writer writer) throws IOException {
            for (String header : headers) {
                writer.write(header);
            }
        }
    });
    writer.setLineAggregator(new DelimitedLineAggregator<FieldSet>());
    writer.open(new ExecutionContext());

    String[] names = getFields(list, 1);
    String[] country = getFields(list, 2);
    String[] products = getFields(list, 3);
    double[] amounts = getMinMax(list, 4);

    NumberFormat formatter = new DecimalFormat("#.##");
    int count = 20;
    for (int i = 0; i < 100; i++) {
        List<FieldSet> items = new ArrayList<FieldSet>();
        for (FieldSet fieldSet : list) {
            String[] values = fieldSet.getValues();
            values[0] = "" + (count++);
            values[1] = choose(names);
            values[2] = choose(country);
            values[3] = choose(products);
            values[4] = formatter.format(random(amounts));
            items.add(new DefaultFieldSet(values));
        }
        writer.write(items);
    }
    writer.close();

}

---