Examples with MvelConstraint org.drools.core.rule.constraint.MvelConstraint used on opensource projects

Example 11 with MvelConstraint

use of org.drools.core.rule.constraint.MvelConstraint in project drools by kiegroup.

the class FieldConstraintTest method testLiteralConstraint.

/**
 * <pre>
 *
 *                ( Cheese (type &quot;cheddar&quot;) )
 *
 * </pre>
 *
 * This is currently the same as using a ReturnValueConstraint just that it
 * doesn't need any requiredDeclarations
 */
@Test
public void testLiteralConstraint() {
    InternalKnowledgeBase kBase = (InternalKnowledgeBase) KnowledgeBaseFactory.newKnowledgeBase();
    StatefulKnowledgeSessionImpl ksession = (StatefulKnowledgeSessionImpl) kBase.newKieSession();
    final ClassFieldReader extractor = store.getReader(Cheese.class, "type");
    final MvelConstraint constraint = new MvelConstraintTestUtil("type == \"cheddar\"", FieldFactory.getInstance().getFieldValue("cheddar"), extractor);
    final Cheese cheddar = new Cheese("cheddar", 5);
    final InternalFactHandle cheddarHandle = (InternalFactHandle) ksession.insert(cheddar);
    // check constraint
    assertTrue(constraint.isAllowed(cheddarHandle, ksession));
    final Cheese stilton = new Cheese("stilton", 5);
    final InternalFactHandle stiltonHandle = (InternalFactHandle) ksession.insert(stilton);
    // check constraint
    assertFalse(constraint.isAllowed(stiltonHandle, ksession));
}

Example 12 with MvelConstraint

use of org.drools.core.rule.constraint.MvelConstraint in project drools by kiegroup.

the class IndexUtil method findDualConstraint.

private static int findDualConstraint(BetaNodeFieldConstraint[] constraints, int comparisonPos) {
    if (!(USE_RANGE_INDEX && constraints[comparisonPos] instanceof MvelConstraint)) {
        return -1;
    }
    MvelConstraint firstConstraint = (MvelConstraint) constraints[comparisonPos];
    String leftValue = getLeftValueInExpression(firstConstraint.getExpression());
    for (int i = comparisonPos + 1; i < constraints.length; i++) {
        if (constraints[i] instanceof MvelConstraint) {
            MvelConstraint dualConstraint = (MvelConstraint) constraints[i];
            if (isDual(firstConstraint, leftValue, dualConstraint)) {
                return i;
            }
        }
    }
    return -1;
}

Example 13 with MvelConstraint

use of org.drools.core.rule.constraint.MvelConstraint in project drools by kiegroup.

the class MVELTest method testArrayAccessorWithStaticFieldAccess.

@Test
public void testArrayAccessorWithStaticFieldAccess() {
    final String str = "" + "package org.drools.compiler.test \n" + "import " + Person.class.getCanonicalName() + "\n" + "import " + Address.class.getCanonicalName() + "\n" + "import " + Triangle.class.getCanonicalName() + "\n" + "global java.util.List list \n" + "rule \"show\" \n" + "when  \n" + "    $m : Person( addresses[Triangle.ZERO] == new Address('s1'), addresses[Triangle.ZERO].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.addAddress(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 14 with MvelConstraint

use of org.drools.core.rule.constraint.MvelConstraint in project drools by kiegroup.

the class MVELTest method testArrayAccessorWithGenerics.

@Test
public void testArrayAccessorWithGenerics() {
    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( addresses[0] == new Address('s1'), addresses[0].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.addAddress(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) constraint).getFieldExtractor() instanceof MVELObjectClassFieldReader);
        assertEquals(new Address("s1"), ((MvelConstraint) constraint).getField().getValue());
    }
    alphanode = (AlphaNode) alphanode.getObjectSinkPropagator().getSinks()[0];
    constraint = alphanode.getConstraint();
    if (constraint instanceof MvelConstraint) {
        assertTrue(((MvelConstraint) constraint).getFieldExtractor() instanceof MVELObjectClassFieldReader);
        assertEquals(new Address("s1").getStreet(), ((MvelConstraint) constraint).getField().getValue());
    }
}

Example 15 with MvelConstraint

use of org.drools.core.rule.constraint.MvelConstraint in project drools by kiegroup.

the class FieldConstraintTest method testPrimitiveLiteralConstraint.

/**
 * <pre>
 *
 *                Cheese( price == 5 )
 *
 * </pre>
 */
@Test
public void testPrimitiveLiteralConstraint() {
    InternalKnowledgeBase kBase = (InternalKnowledgeBase) KnowledgeBaseFactory.newKnowledgeBase();
    StatefulKnowledgeSessionImpl ksession = (StatefulKnowledgeSessionImpl) kBase.newKieSession();
    final ClassFieldReader extractor = store.getReader(Cheese.class, "price");
    final MvelConstraint constraint = new MvelConstraintTestUtil("price == 5", FieldFactory.getInstance().getFieldValue(5), extractor);
    final Cheese cheddar = new Cheese("cheddar", 5);
    final InternalFactHandle cheddarHandle = (InternalFactHandle) ksession.insert(cheddar);
    // check constraint
    assertTrue(constraint.isAllowed(cheddarHandle, ksession));
    final Cheese stilton = new Cheese("stilton", 10);
    final InternalFactHandle stiltonHandle = (InternalFactHandle) ksession.insert(stilton);
    // check constraint
    assertFalse(constraint.isAllowed(stiltonHandle, ksession));
}