@Test
public void testRestract() {
final PropagationContext context =
pctxFactory.createPropagationContext(0, PropagationContext.INSERTION, null, null, null);
final StatefulKnowledgeSessionImpl workingMemory =
new StatefulKnowledgeSessionImpl(
1L, (InternalKnowledgeBase) KnowledgeBaseFactory.newKnowledgeBase());
final ClassFieldReader extractor = store.getReader(Cheese.class, "type");
final MvelConstraint constraint =
new MvelConstraintTestUtil(
"type == \"stilton\"", FieldFactory.getInstance().getFieldValue("stilton"), extractor);
final List list = new ArrayList();
final Cheese cheese1 = new Cheese("stilton", 5);
final Cheese cheese2 = new Cheese("stilton", 15);
list.add(cheese1);
list.add(cheese2);
final MockDataProvider dataProvider = new MockDataProvider(list);
final Pattern pattern = new Pattern(0, new ClassObjectType(Cheese.class));
From fromCe = new From(dataProvider);
fromCe.setResultPattern(pattern);
final ReteFromNode from =
new ReteFromNode(
3,
dataProvider,
new MockTupleSource(30),
new AlphaNodeFieldConstraint[] {constraint},
null,
true,
buildContext,
fromCe);
final MockLeftTupleSink sink = new MockLeftTupleSink(5);
from.addTupleSink(sink);
final List asserted = sink.getAsserted();
final Person person1 = new Person("xxx2", 30);
final FactHandle person1Handle = workingMemory.insert(person1);
final LeftTuple tuple = new LeftTupleImpl((DefaultFactHandle) person1Handle, from, true);
from.assertLeftTuple(tuple, context, workingMemory);
assertEquals(2, asserted.size());
final FromMemory memory = (FromMemory) workingMemory.getNodeMemory(from);
assertEquals(1, memory.getBetaMemory().getLeftTupleMemory().size());
assertNull(memory.getBetaMemory().getRightTupleMemory());
RightTuple rightTuple2 = tuple.getFirstChild().getRightParent();
RightTuple rightTuple1 = tuple.getFirstChild().getHandleNext().getRightParent();
assertFalse(rightTuple1.equals(rightTuple2));
assertNull(tuple.getFirstChild().getHandleNext().getHandleNext());
final InternalFactHandle handle2 = rightTuple2.getFactHandle();
final InternalFactHandle handle1 = rightTuple1.getFactHandle();
assertEquals(handle1.getObject(), cheese2);
assertEquals(handle2.getObject(), cheese1);
from.retractLeftTuple(tuple, context, workingMemory);
assertEquals(0, memory.getBetaMemory().getLeftTupleMemory().size());
assertNull(memory.getBetaMemory().getRightTupleMemory());
}
