Example usage for org.springframework.batch.item.support IteratorItemReader IteratorItemReader

Introduction

In this page you can find the example usage for org.springframework.batch.item.support IteratorItemReader IteratorItemReader.

Prototype

public IteratorItemReader(Iterator<T> iterator) 

Source Link

Document

Construct a new reader from this iterator directly.

Usage

From source file:de.langmi.spring.batch.examples.readers.list.IteratorItemReaderTest.java

/**
 * Test should read succesfully./*w w w .j  a  v  a2  s.  c om*/
 *
 * @throws Exception 
 */
@Test
public void testSuccessfulReading() throws Exception {
    // setup reader with test data
    List<String> testData = new TestDataFactoryBean().getObject();
    reader = new IteratorItemReader<String>(testData);
    // read
    int count = 0;
    String line;
    while ((line = reader.read()) != null) {
        assertEquals(String.valueOf(count), line);
        count++;
    }
    assertEquals(testData.size(), count);
}

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From source file:de.langmi.spring.batch.examples.complex.aggregating.reader.AggregateSimpleItemsReaderTest.java

/**
 * Test with ID change, should result in two aggregated items.
 *//*from   ww w .  j a  v a 2s . c o m*/
@Test
public void testReadWithIdChange() throws Exception {
    // create first set of simple items with shared id
    int count = 5;
    int sharedId = 1000;
    int value = 1;
    List<SimpleItem> testData = createTestData(count, sharedId, value);
    // create second set of simple items with shared id
    int countSecond = 6;
    int sharedIdSecond = 2000;
    int valueSecond = 3;
    List<SimpleItem> testData2 = createTestData(countSecond, sharedIdSecond, valueSecond);
    // combine them
    testData.addAll(testData2);
    // setup wrapped delegate
    ItemReader<SimpleItem> delegate = new IteratorItemReader<SimpleItem>(testData);
    reader.setDelegate(delegate);

    // 1. aggregated item
    AggregatedItem item = reader.read();
    assertNotNull(item);
    assertEquals(sharedId, item.getId());
    assertEquals(count * value, item.getSum());
    // 2. aggregated item
    AggregatedItem itemSecond = reader.read();
    assertNotNull(itemSecond);
    assertEquals(sharedIdSecond, itemSecond.getId());
    assertEquals(countSecond * valueSecond, itemSecond.getSum());
    // there should be no next item        
    assertNull(reader.read());
}

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From source file:de.langmi.spring.batch.examples.complex.aggregating.reader.AggregateSimpleItemsReaderTest.java

/**
 * Test without ID change, should result in one aggregated item only.
 */// www  .  ja v  a2 s  .co  m
@Test
public void testReadWithoutIdChange() throws Exception {
    int count = 5;
    int sharedId = 1000;
    int value = 1;
    ItemReader<SimpleItem> delegate = new IteratorItemReader<SimpleItem>(
            createTestData(count, sharedId, value));
    reader.setDelegate(delegate);

    AggregatedItem item = reader.read();
    assertNotNull(item);
    assertEquals(sharedId, item.getId());
    assertEquals(count * value, item.getSum());
    // there should be no next item
    assertNull(reader.read());
}

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