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

Example 1 with ExprConstraintDescr

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

the class XmlPackageReaderTest method testParseSimpleRule.

@Test
public void testParseSimpleRule() throws Exception {
    final XmlPackageReader xmlPackageReader = getXmReader();
    xmlPackageReader.read(new InputStreamReader(getClass().getResourceAsStream("test_SimpleRule1.xml")));
    final PackageDescr packageDescr = xmlPackageReader.getPackageDescr();
    assertNotNull(packageDescr);
    assertEquals("com.sample", packageDescr.getName());
    final List imports = packageDescr.getImports();
    assertEquals(2, imports.size());
    assertEquals("java.util.List", ((ImportDescr) imports.get(0)).getTarget());
    assertEquals("org.drools.mvel.compiler.Person", ((ImportDescr) imports.get(1)).getTarget());
    RuleDescr ruleDescr = (RuleDescr) packageDescr.getRules().get(0);
    assertEquals("simple_rule1", ruleDescr.getName());
    AndDescr lhs = ruleDescr.getLhs();
    PatternDescr patternDescr = (PatternDescr) lhs.getDescrs().get(0);
    assertEquals("Person", patternDescr.getObjectType());
    ExprConstraintDescr expr = (ExprConstraintDescr) ((AndDescr) patternDescr.getConstraint()).getDescrs().get(0);
    assertEquals("name == \"darth\"", expr.getExpression());
    ruleDescr = (RuleDescr) packageDescr.getRules().get(1);
    assertEquals("simple_rule2", ruleDescr.getName());
    lhs = ruleDescr.getLhs();
    patternDescr = (PatternDescr) lhs.getDescrs().get(0);
    assertEquals("Person", patternDescr.getObjectType());
    expr = (ExprConstraintDescr) ((AndDescr) patternDescr.getConstraint()).getDescrs().get(0);
    assertEquals("age == 35 || == -3.5", expr.getExpression());
    ruleDescr = (RuleDescr) packageDescr.getRules().get(2);
    assertEquals("simple_rule3", ruleDescr.getName());
    lhs = ruleDescr.getLhs();
    patternDescr = (PatternDescr) lhs.getDescrs().get(0);
    assertEquals("Person", patternDescr.getObjectType());
    expr = (ExprConstraintDescr) ((AndDescr) patternDescr.getConstraint()).getDescrs().get(0);
    assertEquals("age == 35 || (!= 7.0 && != -70)", expr.getExpression());
    ruleDescr = (RuleDescr) packageDescr.getRules().get(3);
    assertEquals("simple_rule3", ruleDescr.getName());
    lhs = ruleDescr.getLhs();
    patternDescr = (PatternDescr) lhs.getDescrs().get(1);
    assertEquals("Person", patternDescr.getObjectType());
    expr = (ExprConstraintDescr) ((AndDescr) patternDescr.getConstraint()).getDescrs().get(0);
    assertEquals("name == $s", expr.getExpression());
    ruleDescr = (RuleDescr) packageDescr.getRules().get(4);
    assertEquals("simple_rule4", ruleDescr.getName());
    lhs = ruleDescr.getLhs();
    patternDescr = (PatternDescr) lhs.getDescrs().get(1);
    assertEquals("Person", patternDescr.getObjectType());
    expr = (ExprConstraintDescr) ((AndDescr) patternDescr.getConstraint()).getDescrs().get(0);
    assertEquals("(name == $s) || (age == 35 || (!= 7.0 && != -70))", expr.getExpression());
    ruleDescr = (RuleDescr) packageDescr.getRules().get(5);
    assertEquals("simple_rule5", ruleDescr.getName());
    lhs = ruleDescr.getLhs();
    patternDescr = (PatternDescr) lhs.getDescrs().get(1);
    assertEquals("Person", patternDescr.getObjectType());
    expr = (ExprConstraintDescr) ((AndDescr) patternDescr.getConstraint()).getDescrs().get(0);
    assertEquals("(name == $s) || ((age != 34) && (age != 37) && (name != \"yoda\"))", expr.getExpression());
}

Example 2 with ExprConstraintDescr

use of org.drools.drl.ast.descr.ExprConstraintDescr 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 3 with ExprConstraintDescr

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

the class RuleParserTest method testInfinityLiteral.

@Test
public void testInfinityLiteral() throws Exception {
    final String text = "rule \"infinity\"\n" + "when\n" + "    StockTick( this after[-*,*] $another )\n" + "then\n" + "end";
    PatternDescr pattern = (PatternDescr) ((RuleDescr) parse("rule", text)).getLhs().getDescrs().get(0);
    assertEquals("StockTick", pattern.getObjectType());
    ExprConstraintDescr constr = (ExprConstraintDescr) pattern.getConstraint().getDescrs().get(0);
    assertEquals("this after[-*,*] $another", constr.getText());
}

Example 4 with ExprConstraintDescr

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

the class RuleParserTest method testAndOrRules.

/**
 * Test that explicit "&&", "||" works as expected
 */
@Test
public void testAndOrRules() throws Exception {
    final PackageDescr pkg = (PackageDescr) parseResource("compilationUnit", "and_or_rule.drl");
    assertNotNull(pkg);
    assertEquals(1, pkg.getRules().size());
    final RuleDescr rule = (RuleDescr) pkg.getRules().get(0);
    assertEquals("simple_rule", rule.getName());
    // we will have 3 children under the main And node
    final AndDescr and = rule.getLhs();
    assertEquals(3, and.getDescrs().size());
    PatternDescr left = (PatternDescr) and.getDescrs().get(0);
    PatternDescr right = (PatternDescr) and.getDescrs().get(1);
    assertEquals("Person", left.getObjectType());
    assertEquals("Cheese", right.getObjectType());
    assertEquals(1, left.getConstraint().getDescrs().size());
    ExprConstraintDescr fld = (ExprConstraintDescr) left.getConstraint().getDescrs().get(0);
    assertEquals("name == \"mark\"", fld.getExpression());
    assertEquals(1, right.getConstraint().getDescrs().size());
    fld = (ExprConstraintDescr) right.getConstraint().getDescrs().get(0);
    assertEquals("type == \"stilton\"", fld.getExpression());
    // now the "||" part
    final OrDescr or = (OrDescr) and.getDescrs().get(2);
    assertEquals(2, or.getDescrs().size());
    left = (PatternDescr) or.getDescrs().get(0);
    right = (PatternDescr) or.getDescrs().get(1);
    assertEquals("Person", left.getObjectType());
    assertEquals("Cheese", right.getObjectType());
    assertEquals(1, left.getConstraint().getDescrs().size());
    fld = (ExprConstraintDescr) left.getConstraint().getDescrs().get(0);
    assertEquals("name == \"mark\"", fld.getExpression());
    assertEquals(1, right.getConstraint().getDescrs().size());
    fld = (ExprConstraintDescr) right.getConstraint().getDescrs().get(0);
    assertEquals("type == \"stilton\"", fld.getExpression());
    assertEqualsIgnoreWhitespace("System.out.println( \"Mark and Michael\" );", (String) rule.getConsequence());
}

Example 5 with ExprConstraintDescr

use of org.drools.drl.ast.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());
}