Examples with ExprConstraintDescr org.drools.drl.ast.descr.ExprConstraintDescr used on opensource projects

Example 41 with ExprConstraintDescr

use of org.drools.drl.ast.descr.ExprConstraintDescr in project drools by kiegroup.

the class KnowledgeBuilderTest method testErrors.

@Test
public void testErrors() throws Exception {
    final KnowledgeBuilderImpl builder = new KnowledgeBuilderImpl();
    final PackageDescr packageDescr = new PackageDescr("p1");
    final RuleDescr ruleDescr = new RuleDescr("rule-1");
    packageDescr.addRule(ruleDescr);
    final AndDescr lhs = new AndDescr();
    ruleDescr.setLhs(lhs);
    final PatternDescr pattern = new PatternDescr(Cheese.class.getName(), "stilton");
    lhs.addDescr(pattern);
    BindingDescr fieldBindingDescr = new BindingDescr("x", "price");
    pattern.addConstraint(fieldBindingDescr);
    fieldBindingDescr = new BindingDescr("y", "price");
    pattern.addConstraint(fieldBindingDescr);
    packageDescr.addGlobal(new GlobalDescr("map", "java.util.Map"));
    pattern.addConstraint(new ExprConstraintDescr("price == x"));
    // There is no m this should produce errors.
    ruleDescr.setConsequence("update(m);");
    builder.addPackage(packageDescr);
    assertTrue(builder.getErrors().getErrors().length > 0);
}

Example 42 with ExprConstraintDescr

use of org.drools.drl.ast.descr.ExprConstraintDescr in project drools by kiegroup.

the class PatternBuilderForQueryTest method testQuery.

@Test
public void testQuery() throws Exception {
    final KnowledgeBuilderImpl builder = new KnowledgeBuilderImpl();
    final PackageDescr packageDescr = new PackageDescr("p1");
    final QueryDescr queryDescr = new QueryDescr("query1");
    queryDescr.addParameter("String", "$type");
    packageDescr.addRule(queryDescr);
    final AndDescr lhs = new AndDescr();
    queryDescr.setLhs(lhs);
    final PatternDescr pattern = new PatternDescr(Cheese.class.getName(), "stilton");
    lhs.addDescr(pattern);
    pattern.addConstraint(new ExprConstraintDescr("type == $type"));
    // Another query, no parameters
    QueryDescr queryDescr2 = new QueryDescr("query2");
    packageDescr.addRule(queryDescr2);
    AndDescr lhs2 = new AndDescr();
    queryDescr2.setLhs(lhs2);
    PatternDescr pattern2 = new PatternDescr(Cheese.class.getName());
    lhs2.addDescr(pattern2);
    builder.addPackage(packageDescr);
    assertLength(0, builder.getErrors().getErrors());
    InternalKnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
    kbase.addPackages(Arrays.asList(new KiePackage[] { builder.getPackage(packageDescr.getName()) }));
    final KieSession session = kbase.newKieSession();
    session.insert(new Cheese("stilton", 15));
    QueryResults results = session.getQueryResults("query1", "stilton");
    assertEquals(1, results.size());
    Object object = results.iterator().next().get("stilton");
    assertEquals(new Cheese("stilton", 15), object);
    results = session.getQueryResults("query1", new Object[] { "cheddar" });
    assertEquals(0, results.size());
    session.insert(new Cheese("dolcelatte", 20));
    results = session.getQueryResults("query2", new Object[] {});
    assertEquals(2, results.size());
}

Example 43 with ExprConstraintDescr

use of org.drools.drl.ast.descr.ExprConstraintDescr in project drools by kiegroup.

the class KnowledgeBuilderTest method testPredicate.

@Test
public void testPredicate() throws Exception {
    final KnowledgeBuilderImpl builder = new KnowledgeBuilderImpl();
    final PackageDescr packageDescr = new PackageDescr("p1");
    final RuleDescr ruleDescr = new RuleDescr("rule-1");
    packageDescr.addRule(ruleDescr);
    final AndDescr lhs = new AndDescr();
    ruleDescr.setLhs(lhs);
    final PatternDescr pattern = new PatternDescr(Cheese.class.getName(), "stilton");
    lhs.addDescr(pattern);
    final BindingDescr fieldBindingDescr = new BindingDescr("x", "price");
    pattern.addConstraint(fieldBindingDescr);
    final BindingDescr fieldBindingDescr2 = new BindingDescr("y", "price");
    pattern.addConstraint(fieldBindingDescr2);
    packageDescr.addGlobal(new GlobalDescr("map", "java.util.Map"));
    final ExprConstraintDescr predicate = new ExprConstraintDescr("eval(( ( Integer )map.get( new Integer(x) )).intValue() == y)");
    pattern.addConstraint(predicate);
    ruleDescr.setConsequence("update(stilton);");
    builder.addPackage(packageDescr);
    assertLength(0, builder.getErrors().getErrors());
}

Example 44 with ExprConstraintDescr

use of org.drools.drl.ast.descr.ExprConstraintDescr in project drools by kiegroup.

the class KnowledgeBuilderTest method createReturnValueRule.

private void createReturnValueRule(final PackageDescr packageDescr, final String expression) {
    final RuleDescr ruleDescr = new RuleDescr("rule-1");
    packageDescr.addRule(ruleDescr);
    final AndDescr lhs = new AndDescr();
    ruleDescr.setLhs(lhs);
    final PatternDescr pattern = new PatternDescr(Cheese.class.getName(), "stilton");
    lhs.addDescr(pattern);
    BindingDescr fieldBindingDescr = new BindingDescr("x", "price");
    pattern.addConstraint(fieldBindingDescr);
    fieldBindingDescr = new BindingDescr("y", "price");
    pattern.addConstraint(fieldBindingDescr);
    packageDescr.addGlobal(new GlobalDescr("map", "java.util.Map"));
    pattern.addConstraint(new ExprConstraintDescr("price == (" + expression + ")"));
    ruleDescr.setConsequence("update(stilton);");
}

Example 45 with ExprConstraintDescr

use of org.drools.drl.ast.descr.ExprConstraintDescr in project drools by kiegroup.

the class RestrictionConnectiveHandler method end.

public Object end(final String uri, final String localName, final ExtensibleXmlParser parser) throws SAXException {
    final Element element = parser.endElementBuilder();
    Object op = parser.getParent();
    ConnectiveDescr c = (ConnectiveDescr) parser.getCurrent();
    if (op instanceof PatternDescr) {
        StringBuilder sb = new StringBuilder();
        c.buildExpression(sb);
        ExprConstraintDescr expr = new ExprConstraintDescr();
        expr.setExpression(sb.toString());
        final PatternDescr patternDescr = (PatternDescr) op;
        patternDescr.addConstraint(expr);
    } else {
        ConnectiveDescr p = (ConnectiveDescr) op;
        p.add(c);
    }
    return c;
}