Package org.drools.lang.descr

Examples of org.drools.lang.descr.RuleDescr

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    public void setUp() {
    }

    public void testSimpleExpression() {
        final Package pkg = new Package( "pkg1" );
        final RuleDescr ruleDescr = new RuleDescr( "rule 1" );

        PackageBuilder pkgBuilder = new PackageBuilder( pkg );
        final PackageBuilderConfiguration conf = pkgBuilder.getPackageBuilderConfiguration();
        MVELDialect mvelDialect = ( MVELDialect ) pkgBuilder.getDialectRegistry().getDialect( "mvel" );
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        assertFalse( parser.hasErrors() );
    }

    public void testLiteralBoolAndNegativeNumbersRule() throws Exception {
        final DRLParser parser = parseResource( "literal_bool_and_negative.drl" );
        final RuleDescr rule = parser.rule();
        assertFalse( parser.hasErrors() );

        assertNotNull( rule );

        assertEquals( "simple_rule",
                      rule.getName() );
        assertNotNull( rule.getLhs() );
        assertEqualsIgnoreWhitespace( "cons();",
                                      (String) rule.getConsequence() );

        final AndDescr lhs = rule.getLhs();
        assertEquals( 3,
                      lhs.getDescrs().size() );

        PatternDescr pattern = (PatternDescr) lhs.getDescrs().get( 0 );
        assertEquals( 1,
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        parseResource( "test_EmptyPattern.drl" );
        this.parser.compilation_unit();
        final PackageDescr packageDescr = this.parser.getPackageDescr();
        assertEquals( 1,
                      packageDescr.getRules().size() );
        final RuleDescr ruleDescr = (RuleDescr) packageDescr.getRules().get( 0 );
        assertEquals( "simple rule",
                      ruleDescr.getName() );
        assertNotNull( ruleDescr.getLhs() );
        assertEquals( 1,
                      ruleDescr.getLhs().getDescrs().size() );
        final PatternDescr patternDescr = (PatternDescr) ruleDescr.getLhs().getDescrs().get( 0 );
        assertEquals( 0,
                      patternDescr.getConstraint().getDescrs().size() ); //this may be null, not sure as the test doesn't get this far...
        assertEquals( "Cheese",
                      patternDescr.getObjectType() );
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    }

    public void testSimpleMethodCallWithFrom() throws Exception {

        final RuleDescr rule = parseResource( "test_SimpleMethodCallWithFrom.drl" ).rule();
        final PatternDescr pattern = (PatternDescr) rule.getLhs().getDescrs().get( 0 );
        final FromDescr from = (FromDescr) pattern.getSource();
        final AccessorDescr method = (AccessorDescr) from.getDataSource();

        assertFalse( this.parser.getErrorMessages().toString(),
                     this.parser.hasErrors() );
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                      method.toString() );
    }

    public void testSimpleFunctionCallWithFrom() throws Exception {

        final RuleDescr rule = parseResource( "test_SimpleFunctionCallWithFrom.drl" ).rule();
        final PatternDescr pattern = (PatternDescr) rule.getLhs().getDescrs().get( 0 );
        final FromDescr from = (FromDescr) pattern.getSource();
        final AccessorDescr func = (AccessorDescr) from.getDataSource();

        assertFalse( this.parser.getErrorMessages().toString(),
                     this.parser.hasErrors() );
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                      func.toString() );
    }

    public void testSimpleAccessorWithFrom() throws Exception {

        final RuleDescr rule = parseResource( "test_SimpleAccessorWithFrom.drl" ).rule();
        final PatternDescr pattern = (PatternDescr) rule.getLhs().getDescrs().get( 0 );
        final FromDescr from = (FromDescr) pattern.getSource();
        final AccessorDescr accessor = (AccessorDescr) from.getDataSource();

        assertFalse( this.parser.getErrorMessages().toString(),
                     this.parser.hasErrors() );
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                      accessor.toString() );
    }

    public void testSimpleAccessorAndArgWithFrom() throws Exception {

        final RuleDescr rule = parseResource( "test_SimpleAccessorArgWithFrom.drl" ).rule();
        final PatternDescr pattern = (PatternDescr) rule.getLhs().getDescrs().get( 0 );
        final FromDescr from = (FromDescr) pattern.getSource();
        final AccessorDescr accessor = (AccessorDescr) from.getDataSource();

        assertFalse( this.parser.getErrorMessages().toString(),
                     this.parser.hasErrors() );
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        assertEquals( "something.doIt[\"key\"]",
                      accessor.toString() );
    }

    public void testComplexChainedAcessor() throws Exception {
        final RuleDescr rule = parseResource( "test_ComplexChainedCallWithFrom.drl" ).rule();
        final PatternDescr pattern = (PatternDescr) rule.getLhs().getDescrs().get( 0 );
        final FromDescr from = (FromDescr) pattern.getSource();
        final AccessorDescr accessor = (AccessorDescr) from.getDataSource();

        assertFalse( this.parser.getErrorMessages().toString(),
                     this.parser.hasErrors() );
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    //
    //            assertEquals("Bam", ((PatternDescr)rule.getLhs().getDescrs().get(8)).getObjectType());
    //        }

    public void testSimpleRule() throws Exception {
        final RuleDescr rule = parseResource( "simple_rule.drl" ).rule();

        assertNotNull( rule );

        assertEquals( "simple_rule",
                      rule.getName() );

        assertEquals( 7,
                      rule.getConsequenceLine() );
        assertEquals( 2,
                      rule.getConsequencePattern() );

        final AndDescr lhs = rule.getLhs();

        assertNotNull( lhs );

        assertEquals( 3,
                      lhs.getDescrs().size() );

        //System.err.println( lhs.getDescrs() );

        // Check first pattern
        final PatternDescr first = (PatternDescr) lhs.getDescrs().get( 0 );
        assertEquals( "foo3",
                      first.getIdentifier() );
        assertEquals( "Bar",
                      first.getObjectType() );

        assertEquals( 1,
                      first.getConstraint().getDescrs().size() );

        AndDescr fieldAnd = (AndDescr) first.getConstraint();
        FieldConstraintDescr fld = (FieldConstraintDescr) fieldAnd.getDescrs().get( 0 );
        LiteralRestrictionDescr constraint = (LiteralRestrictionDescr) fld.getRestrictions().get( 0 );

        assertNotNull( constraint );

        assertEquals( "a",
                      fld.getFieldName() );
        assertEquals( "==",
                      constraint.getEvaluator() );
        assertEquals( "3",
                      constraint.getText() );

        // Check second pattern
        final PatternDescr second = (PatternDescr) lhs.getDescrs().get( 1 );
        assertEquals( "foo4",
                      second.getIdentifier() );
        assertEquals( "Bar",
                      second.getObjectType() );

        //System.err.println( second.getDescrs() );

        fieldAnd = (AndDescr) second.getConstraint();
        assertEquals( 2,
                      fieldAnd.getDescrs().size() );

        final FieldBindingDescr fieldBindingDescr = (FieldBindingDescr) fieldAnd.getDescrs().get( 0 );
        assertEquals( "a",
                      fieldBindingDescr.getFieldName() );
        assertEquals( "a4",
                      fieldBindingDescr.getIdentifier() );

        fld = (FieldConstraintDescr) fieldAnd.getDescrs().get( 1 );
        constraint = (LiteralRestrictionDescr) fld.getRestrictions().get( 0 );

        assertNotNull( constraint );

        assertEquals( "a",
                      fld.getFieldName() );
        assertEquals( "==",
                      constraint.getEvaluator() );
        assertEquals( "4",
                      constraint.getText() );

        // Check third pattern
        final PatternDescr third = (PatternDescr) lhs.getDescrs().get( 2 );
        assertNull( third.getIdentifier() );
        assertEquals( "Baz",
                      third.getObjectType() );

        assertEqualsIgnoreWhitespace( "if ( a == b ) { " + "  assert( foo3 );" + "} else {" + "  retract( foo4 );" + "}" + "  System.out.println( a4 );",
                                      (String) rule.getConsequence() );

        assertFalse( this.parser.hasErrors() );
    }
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        assertFalse( this.parser.hasErrors() );
    }

    public void testRestrictionsMultiple() throws Exception {
        final RuleDescr rule = parseResource( "restrictions_test.drl" ).rule();

        assertFalse( this.parser.getErrors().toString(),
                     this.parser.hasErrors() );
        assertNotNull( rule );

        assertEqualsIgnoreWhitespace( "consequence();",
                                      (String) rule.getConsequence() );
        assertEquals( "simple_rule",
                      rule.getName() );
        assertEquals( 2,
                      rule.getLhs().getDescrs().size() );

        //The first pattern, with 2 restrictions on a single field (plus a connective)
        PatternDescr pattern = (PatternDescr) rule.getLhs().getDescrs().get( 0 );
        assertEquals( "Person",
                      pattern.getObjectType() );
        assertEquals( 1,
                      pattern.getConstraint().getDescrs().size() );

        AndDescr and = (AndDescr) pattern.getConstraint();
        FieldConstraintDescr fld = (FieldConstraintDescr) and.getDescrs().get( 0 );
        assertEquals( RestrictionConnectiveDescr.AND,
                      ((RestrictionConnectiveDescr) fld.getRestriction()).getConnective() );
        assertEquals( 2,
                      fld.getRestrictions().size() );
        assertEquals( "age",
                      fld.getFieldName() );

        LiteralRestrictionDescr lit = (LiteralRestrictionDescr) fld.getRestrictions().get( 0 );
        assertEquals( ">",
                      lit.getEvaluator() );
        assertEquals( "30",
                      lit.getText() );

        lit = (LiteralRestrictionDescr) fld.getRestrictions().get( 1 );
        assertEquals( "<",
                      lit.getEvaluator() );
        assertEquals( "40",
                      lit.getText() );

        //the second col, with 2 fields, the first with 2 restrictions, the second field with one
        pattern = (PatternDescr) rule.getLhs().getDescrs().get( 1 );
        assertEquals( "Vehicle",
                      pattern.getObjectType() );
        assertEquals( 2,
                      pattern.getConstraint().getDescrs().size() );
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Related Classes of org.drools.lang.descr.RuleDescr

  • org.drools.clips.LhsClpParserTest
  • org.drools.compiler.PackageBuilder
  • org.drools.compiler.PackageBuilderConfigurationTest
  • org.drools.compiler.PackageBuilderTest
  • org.drools.compiler.QueryBuilderTest
  • org.drools.compiler.RuleErrorTest
  • org.drools.compiler.xml.rules.AndHandler
  • org.drools.compiler.xml.rules.OrHandler
  • org.drools.compiler.xml.rules.RuleHandler
  • org.drools.compiler.xml.rules.XmlPackageReaderTest
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