Examples with PatternDSL.accumulate org.drools.model.PatternDSL.accumulate used on opensource projects

Example 1 with PatternDSL.accumulate

use of org.drools.model.PatternDSL.accumulate in project drools by kiegroup.

the class PatternDSLTest method testTwoAccumulatesWithVarBindingModel.

@Test
public void testTwoAccumulatesWithVarBindingModel() {
    Variable<Person> a = PatternDSL.declarationOf(Person.class);
    Variable<Pair> accSource = PatternDSL.declarationOf(Pair.class);
    Variable<Collection> accResult = PatternDSL.declarationOf(Collection.class);
    Variable<Collection> accResult2 = PatternDSL.declarationOf(Collection.class);
    Variable<Pair> wrapped = PatternDSL.declarationOf(Pair.class, PatternDSL.from(accResult));
    Variable<Object> unwrapped1 = PatternDSL.declarationOf(Object.class);
    PatternDSL.PatternDef aPattern = PatternDSL.pattern(a).bind(accSource, v -> Pair.create(v.getName(), v.getAge()));
    ViewItem accumulate = PatternDSL.accumulate(aPattern, DSL.accFunction(CollectSetAccumulateFunction::new, accSource).as(accResult));
    PatternDSL.PatternDef secondPattern = PatternDSL.pattern(accResult);
    PatternDSL.PatternDef thirdPattern = // If binding removed, test will pass.
    PatternDSL.pattern(wrapped).bind(unwrapped1, Pair::getKey);
    ViewItem accumulate2 = PatternDSL.accumulate(PatternDSL.and(secondPattern, thirdPattern), DSL.accFunction(CollectSetAccumulateFunction::new, wrapped).as(accResult2));
    Rule rule = PatternDSL.rule("R").build(accumulate, accumulate2, PatternDSL.on(accResult2).execute(obj -> {
        boolean works = obj.contains(Pair.create("Lukas", 35));
        if (!works) {
            throw new IllegalStateException("Why is " + obj + " not Set<" + Pair.class + ">?");
        }
    }));
    Model model = new ModelImpl().addRule(rule);
    KieBase kieBase = KieBaseBuilder.createKieBaseFromModel(model);
    KieSession session = kieBase.newKieSession();
    session.insert(new Person("Lukas", 35));
    session.fireAllRules();
}