@Test
public void testForwardOnly() throws Exception {
ElementSymbol x = new ElementSymbol("x"); // $NON-NLS-1$
x.setType(DataTypeManager.DefaultDataClasses.INTEGER);
List<ElementSymbol> schema = Arrays.asList(x);
TupleBuffer tb =
BufferManagerFactory.getStandaloneBufferManager()
.createTupleBuffer(schema, "x", TupleSourceType.PROCESSOR); // $NON-NLS-1$
tb.setForwardOnly(true);
tb.addTuple(Arrays.asList(1));
TupleBatch batch = tb.getBatch(1);
assertTrue(!batch.getTerminationFlag());
assertEquals(1, batch.getBeginRow());
try {
tb.getBatch(1);
fail("expected exception"); // $NON-NLS-1$
} catch (AssertionError e) {
}
tb.addTuple(Arrays.asList(1));
tb.close();
batch = tb.getBatch(2);
assertTrue(batch.getTerminationFlag());
assertEquals(2, batch.getBeginRow());
}
/**
* Create a new iterator for this buffer
*
* @return
*/
public TupleBufferTupleSource createIndexedTupleSource(final boolean singleUse) {
if (singleUse) {
setForwardOnly(true);
}
return new TupleBufferTupleSource(singleUse);
}