// where outgoing fields are SWAP
@Test
public void testSelectorSwap() {
// if( getOutputSelector().isSwap() )
// {
// if( remainderFields.size() == 0 ) // the same as Fields.RESULTS
// return output;
// else
// return inputEntry.selectTuple( remainderFields ).append( output );
// }
Fields incomingFields = new Fields("1", "2", "3", "4");
Tuple incoming = new Tuple(1, 2, 3, 4);
Fields remainderFields = new Fields("1", "4");
Tuple bottomView = TupleViews.createNarrow(incomingFields.getPos(remainderFields), incoming);
assertEquals(new Tuple(1, 4), bottomView);
assertEquals(new Tuple(1, 4), new Tuple(bottomView));
Fields resultFields = new Fields("5", "6", "7");
Tuple result = new Tuple(5, 6, 7);
Tuple view = TupleViews.createComposite(bottomView, result);
assertEquals(new Tuple(1, 4, 5, 6, 7), view);
assertEquals(new Tuple(1, 4, 5, 6, 7), new Tuple(view));
Tuple fieldView = TupleViews.createComposite(remainderFields, resultFields);
TupleViews.reset(fieldView, view, result);
assertEquals(new Tuple(1, 4, 5, 6, 7), fieldView);
assertEquals(new Tuple(1, 4, 5, 6, 7), new Tuple(fieldView));
}
// tests actual swap algebra
@Test
public void testSelectorSwap2() {
Fields incomingFields = new Fields("0", "1", 2, 3);
Tuple incoming = new Tuple(0, 1, 2, 3);
Fields resultFields = new Fields("0", "1");
Tuple result = new Tuple(0, 1);
Fields remainderFields = incomingFields.subtract(resultFields);
Tuple remainderView = createNarrow(incomingFields.getPos(remainderFields));
Tuple outgoingTuple = createComposite(Fields.asDeclaration(remainderFields), resultFields);
TupleViews.reset(remainderView, incoming);
TupleViews.reset(outgoingTuple, remainderView, result);
assertEquals(new Tuple(2, 3, 0, 1), outgoingTuple);
assertEquals(new Tuple(2, 3, 0, 1), new Tuple(outgoingTuple));
}
@Override
public boolean source(
FlowProcess<? extends Properties> flowProcess,
SourceCall<LineNumberReader, InputStream> sourceCall)
throws IOException {
String line = sourceCall.getContext().readLine();
if (line == null) return false;
if (skipHeader && sourceCall.getContext().getLineNumber() == 1) // todo: optimize this away
line = sourceCall.getContext().readLine();
if (line == null) return false;
Object[] split = delimitedParser.parseLine(line);
// assumption it is better to re-use than to construct new
Tuple tuple = sourceCall.getIncomingEntry().getTuple();
TupleViews.reset(tuple, split);
return true;
}