Example usage for org.springframework.batch.item ItemStreamReader read

Introduction

In this page you can find the example usage for org.springframework.batch.item ItemStreamReader read.

Prototype

@Nullable
T read() throws Exception, UnexpectedInputException, ParseException, NonTransientResourceException;

Source Link

Document

Reads a piece of input data and advance to the next one.

Usage

From source file:de.langmi.spring.batch.examples.readers.support.CompositeItemStreamReader.java

@Override
public T read() throws Exception, UnexpectedInputException, ParseException, NonTransientResourceException {
    // read from all registered readers
    List items = new ArrayList();
    for (ItemStreamReader<?> itemReaderStream : itemReaderStreams) {
        items.add(itemReaderStream.read());
    }//from  w  w  w .  j  a  va 2 s  . co  m
    // delegate to mapper
    return unifyingMapper.mapItems(items);
}

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From source file:com.create.batch.TicketReaderFactoryTest.java

@Test(expected = FlatFileParseException.class)
public void testCreateReaderAndFailToRead() throws Exception {
    // given/*from w  w w  . j  a  va2 s . c o m*/
    final ExecutionContext executionContext = mock(ExecutionContext.class);

    // when
    final ItemStreamReader<Ticket> reader = factory.createReader(new ClassPathResource("tickets-fail.csv"));

    try {
        reader.open(executionContext);
        System.out.println(reader.read());
    } finally {
        reader.close();
    }

    // then
}

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From source file:com.create.batch.TicketReaderFactoryTest.java

@Test
public void testCreateReaderAndReadCorrectData() throws Exception {
    // given//from www.ja  v  a2 s . co  m
    final ExecutionContext executionContext = mock(ExecutionContext.class);
    final LocalDate date = LocalDate.of(2015, 12, 20);

    // when
    final ItemStreamReader<Ticket> reader = factory.createReader(new ClassPathResource("tickets.csv"));
    final Ticket ticket;

    try {
        reader.open(executionContext);
        ticket = reader.read();
    } finally {
        reader.close();
    }

    // then
    assertThat(ticket, notNullValue());
    assertThat(ticket.getTag(), equalTo("Ticket_0"));
    assertThat(ticket.getDate(), equalTo(Date.valueOf(date)));
    assertThat(ticket.getContent(), equalTo("Test ticket"));
}

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From source file:egovframework.rte.bat.core.item.composite.reader.EgovCompositeFileReader.java

public T read() throws Exception, UnexpectedInputException, ParseException, NonTransientResourceException {
    Object[] items = new Object[itemReaderList.size()];

    int count = 0;
    int flagCount = 0;
    if (returnType.toUpperCase().equals("READER")) {

        for (ItemStreamReader<?> itemReader : itemReaderList) {
            items[count] = itemReader;//from  w ww .  ja v  a  2s.co m
            count++;
        }
    } else {
        for (ItemStreamReader<?> itemReader : itemReaderList) {
            Object o = null;

            if ((o = itemReader.read()) == null) {
                flagCount = flagCount + 1;
            } else {
                items[count] = o;
            }
            count++;

            if (flagCount == itemReaderList.size()) {
                return null;
            }
        }
    }
    return itemsMapper.mapItems(items);
}

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From source file:org.beanio.spring.SpringTest.java

/**
 * Test standalone flat file reader configuration.
 *//*from w ww. j a v  a 2s .  co m*/
@Test
@SuppressWarnings("unchecked")
public void testItemReader() throws Exception {
    ItemStreamReader<Map<String, Object>> reader = (ItemStreamReader<Map<String, Object>>) context
            .getBean("itemReader-standalone");
    assertNotNull(reader);

    try {
        reader.open(new ExecutionContext());

        Map<String, Object> map = reader.read();
        assertNotNull(map);
        assertEquals(new Integer(1), map.get("id"));
        assertEquals("John", map.get("name"));

    } finally {
        reader.close();
    }
}

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From source file:org.beanio.spring.SpringTest.java

@Test
@SuppressWarnings("unchecked")
public void testRestartItemReader() throws Exception {
    ItemStreamReader<Map<String, Object>> reader = (ItemStreamReader<Map<String, Object>>) context
            .getBean("itemReader-restart");
    assertNotNull(reader);/*from   w w  w.  ja va2  s.c o m*/

    try {
        ExecutionContext executionContext = new ExecutionContext();
        executionContext.put("BeanIOFlatFileItemReader.read.count", new Integer(2));

        reader.open(executionContext);

        Map<String, Object> map = reader.read();
        assertNotNull(map);
        assertEquals(new Integer(3), map.get("id"));
        assertEquals("Joe", map.get("name"));
    } finally {
        reader.close();
    }
}

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From source file:org.springframework.batch.core.scope.StepScopePerformanceTests.java

private int doTest(String name, String test) throws Exception {
    @SuppressWarnings("unchecked")
    ItemStreamReader<String> reader = (ItemStreamReader<String>) applicationContext.getBean(name);
    reader.open(new ExecutionContext());
    StopWatch stopWatch = new StopWatch(test);
    stopWatch.start();//from  ww w  . j a  v a  2 s . c o  m
    int count = 0;
    while (reader.read() != null) {
        // do nothing
        count++;
    }
    stopWatch.stop();
    reader.close();
    logger.info(stopWatch.shortSummary());
    return count;
}

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