Examples with ExprConstraintDescr org.drools.compiler.lang.descr.ExprConstraintDescr used on opensource projects

Example 21 with ExprConstraintDescr

use of org.drools.compiler.lang.descr.ExprConstraintDescr in project drools by kiegroup.

the class RuleParserTest method testNotMemberof.

@Test
public void testNotMemberof() throws Exception {
    final String text = "rule X when Country( $cities : city )\nPerson( city not memberOf $cities ) then end\n";
    AndDescr descrs = ((RuleDescr) parse("rule", text)).getLhs();
    assertEquals(2, descrs.getDescrs().size());
    PatternDescr pat = (PatternDescr) descrs.getDescrs().get(1);
    ExprConstraintDescr fieldConstr = (ExprConstraintDescr) pat.getConstraint().getDescrs().get(0);
    assertEquals("city not memberOf $cities", fieldConstr.getExpression());
}

Example 22 with ExprConstraintDescr

use of org.drools.compiler.lang.descr.ExprConstraintDescr in project drools by kiegroup.

the class RuleParserTest method testRuleOldSyntax1.

@Test
public void testRuleOldSyntax1() throws Exception {
    final String source = "rule \"Test\" when ( not $r :LiteralRestriction( operator == Operator.EQUAL ) ) then end";
    PackageDescr pkg = (PackageDescr) parse("compilationUnit", source);
    assertFalse(parser.getErrors().toString(), parser.hasErrors());
    RuleDescr rule = (RuleDescr) pkg.getRules().get(0);
    assertEquals("Test", rule.getName());
    assertEquals(1, rule.getLhs().getDescrs().size());
    assertEquals(1, ((NotDescr) rule.getLhs().getDescrs().get(0)).getDescrs().size());
    NotDescr notDescr = (NotDescr) rule.getLhs().getDescrs().get(0);
    PatternDescr patternDescr = (PatternDescr) notDescr.getDescrs().get(0);
    assertEquals("$r", patternDescr.getIdentifier());
    assertEquals(1, patternDescr.getDescrs().size());
    ExprConstraintDescr fieldConstraintDescr = (ExprConstraintDescr) patternDescr.getDescrs().get(0);
    assertEquals("operator == Operator.EQUAL", fieldConstraintDescr.getExpression());
}

Example 23 with ExprConstraintDescr

use of org.drools.compiler.lang.descr.ExprConstraintDescr in project drools by kiegroup.

the class PatternBuilder method lookupObjectType.

private void lookupObjectType(RuleBuildContext context, PatternDescr patternDescr) {
    List<? extends BaseDescr> descrs = patternDescr.getConstraint().getDescrs();
    if (descrs.size() != 1 || !(descrs.get(0) instanceof ExprConstraintDescr)) {
        return;
    }
    ExprConstraintDescr descr = (ExprConstraintDescr) descrs.get(0);
    String expr = descr.getExpression();
    if (expr.charAt(0) != '/') {
        return;
    }
    XpathAnalysis xpathAnalysis = XpathAnalysis.analyze(expr);
    if (xpathAnalysis.hasError()) {
        registerDescrBuildError(context, patternDescr, "Invalid xpath expression '" + expr + "': " + xpathAnalysis.getError());
        return;
    }
    XpathPart firstXpathChunk = xpathAnalysis.getPart(0);
    String identifier = firstXpathChunk.getField();
    DeclarationScopeResolver resolver = context.getDeclarationResolver();
    if (resolver.hasDataSource(identifier)) {
        patternDescr.setObjectType(findObjectType(context, firstXpathChunk, identifier));
        FromDescr fromDescr = new FromDescr();
        fromDescr.setDataSource(new MVELExprDescr(identifier));
        patternDescr.setSource(fromDescr);
        patternDescr.removeAllConstraint();
        firstXpathChunk.getConstraints().forEach(s -> patternDescr.addConstraint(new ExprConstraintDescr(s)));
        if (!xpathAnalysis.isSinglePart()) {
            patternDescr.addConstraint(new ExprConstraintDescr(patternDescr.getIdentifier() + " : " + expr.substring(xpathAnalysis.getPart(1).getStart())));
            patternDescr.setIdentifier("$void$");
        }
    } else {
        Declaration declr = resolver.getDeclaration(identifier);
        patternDescr.setXpathStartDeclaration(declr);
        patternDescr.setObjectType(declr.getExtractor().getExtractToClassName());
        expr = patternDescr.getIdentifier() + (patternDescr.isUnification() ? " := " : " : ") + expr.substring(identifier.length() + 1);
        descr.setExpression(expr);
    }
}

Example 24 with ExprConstraintDescr

use of org.drools.compiler.lang.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 25 with ExprConstraintDescr

use of org.drools.compiler.lang.descr.ExprConstraintDescr in project drools by kiegroup.

the class KnowledgeBuilderTest method testReturnValue.

@Test
public void testReturnValue() 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 == (( (Integer) map.get( new Integer( x )) ).intValue() * y)"));
    ruleDescr.setConsequence("update(stilton);");
    builder.addPackage(packageDescr);
    assertEquals("Should not have any errors", 0, builder.getErrors().getErrors().length);
}