Examples with MVELConstraint org.drools.mvel.MVELConstraint used on opensource projects

Example 1 with MVELConstraint

use of org.drools.mvel.MVELConstraint in project drools by kiegroup.

the class RuleBuilderTest method testBuildBigDecimalLiteralConstraint.

@Test
public void testBuildBigDecimalLiteralConstraint() throws Exception {
    final PackageDescr pkgDescr = new PackageDescr("org.drools");
    final RuleDescr ruleDescr = new RuleDescr("Test Rule");
    AndDescr andDescr = new AndDescr();
    PatternDescr patDescr = new PatternDescr("java.math.BigDecimal", "$bd");
    ExprConstraintDescr fcd = new ExprConstraintDescr("this == 10");
    patDescr.addConstraint(fcd);
    andDescr.addDescr(patDescr);
    ruleDescr.setLhs(andDescr);
    ruleDescr.setConsequence("");
    pkgDescr.addRule(ruleDescr);
    final KnowledgeBuilderImpl kBuilder = new KnowledgeBuilderImpl();
    kBuilder.addPackage(pkgDescr);
    assertTrue(kBuilder.getErrors().toString(), kBuilder.getErrors().isEmpty());
    final RuleImpl rule = kBuilder.getPackages()[0].getRule("Test Rule");
    final GroupElement and = rule.getLhs();
    final Pattern pat = (Pattern) and.getChildren().get(0);
    if (pat.getConstraints().get(0) instanceof MVELConstraint) {
        final MVELConstraint fc = (MVELConstraint) pat.getConstraints().get(0);
        assertTrue("Wrong class. Expected java.math.BigDecimal. Found: " + fc.getField().getValue().getClass(), fc.getField().getValue() instanceof BigDecimal);
    }
}

Example 2 with MVELConstraint

use of org.drools.mvel.MVELConstraint in project drools by kiegroup.

the class MVELTest method testNewConstructor.

@Test
public void testNewConstructor() {
    final String str = "" + "package org.drools.mvel.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";
    KieBase kbase = KieBaseUtil.getKieBaseFromKieModuleFromDrl("test", kieBaseTestConfiguration, str);
    KieSession ksession = kbase.newKieSession();
    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);
    }
}

Example 3 with MVELConstraint

use of org.drools.mvel.MVELConstraint in project drools by kiegroup.

the class MVELTest method testArrayAccessorWithGenerics.

@Test
public void testArrayAccessorWithGenerics() {
    final String str = "" + "package org.drools.mvel.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";
    KieBase kbase = KieBaseUtil.getKieBaseFromKieModuleFromDrl("test", kieBaseTestConfiguration, str);
    KieSession ksession = kbase.newKieSession();
    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);
    }
    alphanode = (AlphaNode) alphanode.getObjectSinkPropagator().getSinks()[0];
    constraint = alphanode.getConstraint();
    if (constraint instanceof MVELConstraint) {
        assertTrue(((MVELConstraint) constraint).getFieldExtractor() instanceof MVELObjectClassFieldReader);
    }
}

Example 4 with MVELConstraint

use of org.drools.mvel.MVELConstraint in project drools by kiegroup.

the class MVELTest method testMapAccessorWithStaticFieldAccess.

@Test
public void testMapAccessorWithStaticFieldAccess() {
    final String str = "" + "package org.drools.mvel.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";
    KieBase kbase = KieBaseUtil.getKieBaseFromKieModuleFromDrl("test", kieBaseTestConfiguration, str);
    KieSession ksession = kbase.newKieSession();
    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);
    }
    alphanode = (AlphaNode) alphanode.getObjectSinkPropagator().getSinks()[0];
    constraint = alphanode.getConstraint();
    if (constraint instanceof MVELConstraint) {
        assertTrue(((MVELConstraint) alphanode.getConstraint()).getFieldExtractor() instanceof MVELObjectClassFieldReader);
    }
}

Example 5 with MVELConstraint

use of org.drools.mvel.MVELConstraint in project drools by kiegroup.

the class ConstraintEvaluationExceptionTest method initConstraintTestField.

private void initConstraintTestField(String constraint, String ruleName, String ruleFileName) {
    if (testRunType.isExecutableModel()) {
        predicateInformation = new PredicateInformation(constraint, ruleName, ruleFileName);
    } else {
        mvelConstraint = new MVELConstraint("com.example", constraint, null, null, null, null, null);
        InternalKnowledgeBase kBase = KnowledgeBaseFactory.newKnowledgeBase();
        BuildContext buildContext = new BuildContext(kBase, Collections.emptyList());
        RuleImpl ruleImpl = new RuleImpl(ruleName);
        Resource resource = new ByteArrayResource();
        resource.setSourcePath(ruleFileName);
        ruleImpl.setResource(resource);
        buildContext.setRule(ruleImpl);
        mvelConstraint.registerEvaluationContext(buildContext);
    }
}