Examples with AlphaNodeFieldConstraint org.drools.core.spi.AlphaNodeFieldConstraint used on opensource projects

Example 1 with AlphaNodeFieldConstraint

use of org.drools.core.spi.AlphaNodeFieldConstraint in project drools by kiegroup.

the class PhreakFromNode method doLeftUpdates.

public void doLeftUpdates(FromNode fromNode, FromMemory fm, LeftTupleSink sink, InternalWorkingMemory wm, TupleSets<LeftTuple> srcLeftTuples, TupleSets<LeftTuple> trgLeftTuples, TupleSets<LeftTuple> stagedLeftTuples) {
    BetaMemory bm = fm.getBetaMemory();
    ContextEntry[] context = bm.getContext();
    BetaConstraints betaConstraints = fromNode.getBetaConstraints();
    AlphaNodeFieldConstraint[] alphaConstraints = fromNode.getAlphaConstraints();
    DataProvider dataProvider = fromNode.getDataProvider();
    Class<?> resultClass = fromNode.getResultClass();
    for (LeftTuple leftTuple = srcLeftTuples.getUpdateFirst(); leftTuple != null; ) {
        LeftTuple next = leftTuple.getStagedNext();
        PropagationContext propagationContext = leftTuple.getPropagationContext();
        final Map<Object, RightTuple> previousMatches = (Map<Object, RightTuple>) leftTuple.getContextObject();
        final Map<Object, RightTuple> newMatches = new HashMap<Object, RightTuple>();
        leftTuple.setContextObject(newMatches);
        betaConstraints.updateFromTuple(context, wm, leftTuple);
        FastIterator rightIt = LinkedList.fastIterator;
        for (final java.util.Iterator<?> it = dataProvider.getResults(leftTuple, wm, propagationContext, fm.providerContext); it.hasNext(); ) {
            final Object object = it.next();
            if ((object == null) || !resultClass.isAssignableFrom(object.getClass())) {
                // skip anything if it not assignable
                continue;
            }
            RightTuple rightTuple = previousMatches.remove(object);
            if (rightTuple == null) {
                // new match, propagate assert
                rightTuple = fromNode.createRightTuple(leftTuple, propagationContext, wm, object);
            } else {
                // previous match, so reevaluate and propagate modify
                if (rightIt.next(rightTuple) != null) {
                    // handle the odd case where more than one object has the same hashcode/equals value
                    previousMatches.put(object, (RightTuple) rightIt.next(rightTuple));
                    rightTuple.setNext(null);
                }
            }
            checkConstraintsAndPropagate(sink, leftTuple, rightTuple, alphaConstraints, betaConstraints, propagationContext, wm, fm, context, true, trgLeftTuples, stagedLeftTuples);
            fromNode.addToCreatedHandlesMap(newMatches, rightTuple);
        }
        for (RightTuple rightTuple : previousMatches.values()) {
            for (RightTuple current = rightTuple; current != null; current = (RightTuple) rightIt.next(current)) {
                deleteChildLeftTuple(propagationContext, trgLeftTuples, stagedLeftTuples, current.getFirstChild());
            }
        }
        leftTuple.clearStaged();
        leftTuple = next;
    }
    betaConstraints.resetTuple(context);
}

Example 2 with AlphaNodeFieldConstraint

use of org.drools.core.spi.AlphaNodeFieldConstraint in project drools by kiegroup.

the class MVELTest method testMapAccessorWithStaticFieldAccess.

@Test
public void testMapAccessorWithStaticFieldAccess() {
    final String str = "" + "package org.drools.compiler.test \n" + "import " + Person.class.getCanonicalName() + "\n" + "import " + Address.class.getCanonicalName() + "\n" + "import " + TestEnum.class.getCanonicalName() + "\n" + "global java.util.List list \n" + "rule \"show\" \n" + "when  \n" + "    $m : Person( namedAddresses[TestEnum.ONE] == new Address('s1'), namedAddresses[TestEnum.ONE].street == new Address('s1').street ) \n" + "then \n" + "    list.add('r1'); \n" + "end \n";
    final KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
    kbuilder.add(ResourceFactory.newByteArrayResource(str.getBytes()), ResourceType.DRL);
    if (kbuilder.hasErrors()) {
        fail(kbuilder.getErrors().toString());
    }
    final InternalKnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
    kbase.addPackages(kbuilder.getKnowledgePackages());
    final KieSession ksession = createKnowledgeSession(kbase);
    final List list = new ArrayList();
    ksession.setGlobal("list", list);
    final Person p = new Person("yoda");
    p.getNamedAddresses().put(TestEnum.ONE, new Address("s1"));
    ksession.insert(p);
    ksession.fireAllRules();
    assertEquals("r1", list.get(0));
    // Check it was built with MVELReturnValueExpression constraint
    final List<ObjectTypeNode> nodes = ((InternalKnowledgeBase) kbase).getRete().getObjectTypeNodes();
    ObjectTypeNode node = null;
    for (final ObjectTypeNode n : nodes) {
        if (((ClassObjectType) n.getObjectType()).getClassType() == Person.class) {
            node = n;
            break;
        }
    }
    AlphaNode alphanode = (AlphaNode) node.getObjectSinkPropagator().getSinks()[0];
    AlphaNodeFieldConstraint constraint = alphanode.getConstraint();
    if (constraint instanceof MvelConstraint) {
        assertTrue(((MvelConstraint) alphanode.getConstraint()).getFieldExtractor() instanceof MVELObjectClassFieldReader);
        assertEquals(new Address("s1"), ((MvelConstraint) alphanode.getConstraint()).getField().getValue());
    }
    alphanode = (AlphaNode) alphanode.getObjectSinkPropagator().getSinks()[0];
    constraint = alphanode.getConstraint();
    if (constraint instanceof MvelConstraint) {
        assertTrue(((MvelConstraint) alphanode.getConstraint()).getFieldExtractor() instanceof MVELObjectClassFieldReader);
        assertEquals(new Address("s1").getStreet(), ((MvelConstraint) alphanode.getConstraint()).getField().getValue());
    }
}

Example 3 with AlphaNodeFieldConstraint

use of org.drools.core.spi.AlphaNodeFieldConstraint in project drools by kiegroup.

the class MVELTest method testNewConstructor.

@Test
public void testNewConstructor() {
    final String str = "" + "package org.drools.compiler.test \n" + "import " + Person.class.getCanonicalName() + "\n" + "import " + Address.class.getCanonicalName() + "\n" + "global java.util.List list \n" + "rule \"show\" \n" + "when  \n" + "    $m : Person( address == new Address('s1')) \n" + "then \n" + "    list.add('r1'); \n" + "end \n";
    final KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
    kbuilder.add(ResourceFactory.newByteArrayResource(str.getBytes()), ResourceType.DRL);
    if (kbuilder.hasErrors()) {
        fail(kbuilder.getErrors().toString());
    }
    final InternalKnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
    kbase.addPackages(kbuilder.getKnowledgePackages());
    final KieSession ksession = createKnowledgeSession(kbase);
    final List list = new ArrayList();
    ksession.setGlobal("list", list);
    final Person p = new Person("yoda");
    p.setAddress(new Address("s1"));
    ksession.insert(p);
    ksession.fireAllRules();
    assertEquals("r1", list.get(0));
    // Check it was built with MVELReturnValueExpression constraint
    final List<ObjectTypeNode> nodes = ((InternalKnowledgeBase) kbase).getRete().getObjectTypeNodes();
    ObjectTypeNode node = null;
    for (final ObjectTypeNode n : nodes) {
        if (((ClassObjectType) n.getObjectType()).getClassType() == Person.class) {
            node = n;
            break;
        }
    }
    final AlphaNode alphanode = (AlphaNode) node.getObjectSinkPropagator().getSinks()[0];
    final AlphaNodeFieldConstraint constraint = alphanode.getConstraint();
    if (constraint instanceof MvelConstraint) {
        assertTrue(((MvelConstraint) constraint).getFieldExtractor() instanceof ClassFieldReader);
        final FieldValue r = ((MvelConstraint) constraint).getField();
        assertEquals(p.getAddress(), r.getValue());
    }
}

Example 4 with AlphaNodeFieldConstraint

use of org.drools.core.spi.AlphaNodeFieldConstraint in project drools by kiegroup.

the class CollectBuilder method build.

/**
 * @inheritDoc
 */
public void build(final BuildContext context, final BuildUtils utils, final RuleConditionElement rce) {
    boolean existSubNetwort = false;
    final Collect collect = (Collect) rce;
    context.pushRuleComponent(collect);
    final List<BetaNodeFieldConstraint> resultBetaConstraints = context.getBetaconstraints();
    final List<AlphaNodeFieldConstraint> resultAlphaConstraints = context.getAlphaConstraints();
    final Pattern sourcePattern = collect.getSourcePattern();
    // get builder for the pattern
    final ReteooComponentBuilder builder = utils.getBuilderFor(sourcePattern);
    // save tuple source and pattern offset for later if needed
    final LeftTupleSource tupleSource = context.getTupleSource();
    final int currentPatternIndex = context.getCurrentPatternOffset();
    // builds the source pattern
    builder.build(context, utils, sourcePattern);
    // if object source is null, then we need to adapt tuple source into a subnetwork
    if (context.getObjectSource() == null) {
        RightInputAdapterNode riaNode = context.getComponentFactory().getNodeFactoryService().buildRightInputNode(context.getNextId(), context.getTupleSource(), tupleSource, context);
        // attach right input adapter node to convert tuple source into an object source
        context.setObjectSource(utils.attachNode(context, riaNode));
        // restore tuple source from before the start of the sub network
        context.setTupleSource(tupleSource);
        // create a tuple start equals constraint and set it in the context
        final TupleStartEqualsConstraint constraint = TupleStartEqualsConstraint.getInstance();
        final List<BetaNodeFieldConstraint> betaConstraints = new ArrayList<BetaNodeFieldConstraint>();
        betaConstraints.add(constraint);
        context.setBetaconstraints(betaConstraints);
        existSubNetwort = true;
    }
    BetaConstraints binder = utils.createBetaNodeConstraint(context, context.getBetaconstraints(), false);
    // indexing for the results should be always disabled
    BetaConstraints resultBinder = utils.createBetaNodeConstraint(context, resultBetaConstraints, true);
    CollectAccumulator accumulator = new CollectAccumulator(collect, existSubNetwort);
    Accumulate accumulate = new SingleAccumulate(sourcePattern, sourcePattern.getRequiredDeclarations(), accumulator);
    AccumulateNode accNode = context.getComponentFactory().getNodeFactoryService().buildAccumulateNode(context.getNextId(), context.getTupleSource(), context.getObjectSource(), resultAlphaConstraints.toArray(new AlphaNodeFieldConstraint[resultAlphaConstraints.size()]), // source binder
    binder, resultBinder, accumulate, existSubNetwort, context);
    context.setTupleSource(utils.attachNode(context, accNode));
    // source pattern was bound, so nulling context
    context.setObjectSource(null);
    context.setCurrentPatternOffset(currentPatternIndex);
    context.popRuleComponent();
}

Example 5 with AlphaNodeFieldConstraint

use of org.drools.core.spi.AlphaNodeFieldConstraint in project drools by kiegroup.

the class FromBuilder method build.

/* (non-Javadoc)
     * @see org.kie.reteoo.builder.ReteooComponentBuilder#build(org.kie.reteoo.builder.BuildContext, org.kie.reteoo.builder.BuildUtils, org.kie.rule.RuleConditionElement)
     */
public void build(final BuildContext context, final BuildUtils utils, final RuleConditionElement rce) {
    final From from = (From) rce;
    context.pushRuleComponent(from);
    @SuppressWarnings("unchecked") BetaConstraints betaConstraints = utils.createBetaNodeConstraint(context, context.getBetaconstraints(), true);
    AlphaNodeFieldConstraint[] alphaNodeFieldConstraints = context.getAlphaConstraints() != null ? context.getAlphaConstraints().toArray(new AlphaNodeFieldConstraint[context.getAlphaConstraints().size()]) : new AlphaNodeFieldConstraint[0];
    NodeFactory nodeFactory = context.getComponentFactory().getNodeFactoryService();
    FromNode fromNode = from.isReactive() ? nodeFactory.buildReactiveFromNode(context.getNextId(), from.getDataProvider(), context.getTupleSource(), alphaNodeFieldConstraints, betaConstraints, context.isTupleMemoryEnabled(), context, from) : nodeFactory.buildFromNode(context.getNextId(), from.getDataProvider(), context.getTupleSource(), alphaNodeFieldConstraints, betaConstraints, context.isTupleMemoryEnabled(), context, from);
    context.setTupleSource(utils.attachNode(context, fromNode));
    context.setAlphaConstraints(null);
    context.setBetaconstraints(null);
    context.popRuleComponent();
}