Examples with BatchMapperIterator com.baidu.hugegraph.iterator.BatchMapperIterator used on opensource projects

Example 1 with BatchMapperIterator

use of com.baidu.hugegraph.iterator.BatchMapperIterator in project hugegraph-common by hugegraph.

the class BatchMapperIteratorTest method testMapperReturnEmptyThenHasNext.

@Test
public void testMapperReturnEmptyThenHasNext() {
    Iterator<Integer> results;
    results = new BatchMapperIterator<>(1, DATA3.iterator(), batch -> {
        return Collections.emptyIterator();
    });
    Assert.assertFalse(results.hasNext());
    Assert.assertFalse(results.hasNext());
    AtomicInteger count1 = new AtomicInteger(0);
    results = new BatchMapperIterator<>(1, DATA3.iterator(), batch -> {
        if (count1.incrementAndGet() == 1) {
            return Collections.emptyIterator();
        }
        return batch.iterator();
    });
    Assert.assertTrue(results.hasNext());
    Assert.assertEquals(5, results.next());
    Assert.assertEquals(6, results.next());
    Assert.assertFalse(results.hasNext());
    AtomicInteger count2 = new AtomicInteger(0);
    results = new BatchMapperIterator<>(1, DATA3.iterator(), batch -> {
        if (count2.incrementAndGet() == 2) {
            return Collections.emptyIterator();
        }
        return batch.iterator();
    });
    Assert.assertTrue(results.hasNext());
    Assert.assertEquals(4, results.next());
    Assert.assertEquals(6, results.next());
    Assert.assertFalse(results.hasNext());
    AtomicInteger count3 = new AtomicInteger(0);
    results = new BatchMapperIterator<>(1, DATA3.iterator(), batch -> {
        if (count3.incrementAndGet() == 3) {
            return Collections.emptyIterator();
        }
        return batch.iterator();
    });
    Assert.assertTrue(results.hasNext());
    Assert.assertEquals(4, results.next());
    Assert.assertEquals(5, results.next());
    Assert.assertFalse(results.hasNext());
}

Example 2 with BatchMapperIterator

use of com.baidu.hugegraph.iterator.BatchMapperIterator in project hugegraph-common by hugegraph.

the class BatchMapperIteratorTest method testMapperReturnNullThenHasNext.

@Test
public void testMapperReturnNullThenHasNext() {
    Iterator<Integer> results;
    results = new BatchMapperIterator<>(1, DATA3.iterator(), batch -> {
        return null;
    });
    Assert.assertFalse(results.hasNext());
    Assert.assertFalse(results.hasNext());
    AtomicInteger count1 = new AtomicInteger(0);
    results = new BatchMapperIterator<>(1, DATA3.iterator(), batch -> {
        if (count1.incrementAndGet() == 1) {
            return null;
        }
        return batch.iterator();
    });
    Assert.assertTrue(results.hasNext());
    Assert.assertEquals(5, results.next());
    Assert.assertEquals(6, results.next());
    Assert.assertFalse(results.hasNext());
    AtomicInteger count2 = new AtomicInteger(0);
    results = new BatchMapperIterator<>(1, DATA3.iterator(), batch -> {
        if (count2.incrementAndGet() == 2) {
            return null;
        }
        return batch.iterator();
    });
    Assert.assertTrue(results.hasNext());
    Assert.assertEquals(4, results.next());
    Assert.assertEquals(6, results.next());
    Assert.assertFalse(results.hasNext());
    AtomicInteger count3 = new AtomicInteger(0);
    results = new BatchMapperIterator<>(1, DATA3.iterator(), batch -> {
        if (count3.incrementAndGet() == 3) {
            return null;
        }
        return batch.iterator();
    });
    Assert.assertTrue(results.hasNext());
    Assert.assertEquals(4, results.next());
    Assert.assertEquals(5, results.next());
    Assert.assertFalse(results.hasNext());
}