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

Example 11 with MVELConstraint

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

the class RuleBuilderTest method testBuildBigIntegerLiteralConstraint.

@Test
public void testBuildBigIntegerLiteralConstraint() 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.BigInteger", "$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.BigInteger. Found: " + fc.getField().getValue().getClass(), fc.getField().getValue() instanceof BigInteger);
    }
}