Package org.drools.rule

Examples of org.drools.rule.ReturnValueConstraint

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        };

        /*
         * Creates a constraint with the given expression
         */
        ReturnValueConstraint constraint0 = new ReturnValueConstraint( isCheddar,
                                                                       null, // alpha nodes cannot have required declarations
                                                                       new StringConstraintComparator( ConstraintComparator.EQUAL ) );

        AlphaNode alphaNode = new AlphaNode( 2,
                                             constraint0,
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            registerReadAccessor( context,
                                  pattern.getObjectType(),
                                  fieldName,
                                  (AcceptsReadAccessor) restriction );
        } else if ( restriction instanceof ReturnValueRestriction ) {
            constraint = new ReturnValueConstraint( extractor,
                                                    (ReturnValueRestriction) restriction );
            registerReadAccessor( context,
                                  pattern.getObjectType(),
                                  fieldName,
                                  (ReturnValueConstraint) constraint );
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        final PackageDescr packageDescr1 = new PackageDescr( "package1" );
        createReturnValueRule( packageDescr1,
                               " x + y " );
        builder1.addPackage( packageDescr1 );
        final Pattern pattern1 = (Pattern) builder1.getPackage().getRules()[0].getLhs().getChildren().get( 0 );
        final ReturnValueConstraint returnValue1 = (ReturnValueConstraint) pattern1.getConstraints().get( 2 );

        final PackageBuilder builder2 = new PackageBuilder();
        final PackageDescr packageDescr2 = new PackageDescr( "package2" );
        createReturnValueRule( packageDescr2,
                               " x + y " );
        builder2.addPackage( packageDescr2 );
        final Pattern pattern2 = (Pattern) builder2.getPackage().getRules()[0].getLhs().getChildren().get( 0 );
        final ReturnValueConstraint returnValue2 = (ReturnValueConstraint) pattern2.getConstraints().get( 2 );

        final PackageBuilder builder3 = new PackageBuilder();
        final PackageDescr packageDescr3 = new PackageDescr( "package3" );
        createReturnValueRule( packageDescr3,
                               " x - y " );
        builder3.addPackage( packageDescr3 );
        final Pattern pattern3 = (Pattern) builder3.getPackage().getRules()[0].getLhs().getChildren().get( 0 );
        final ReturnValueConstraint returnValue3 = (ReturnValueConstraint) pattern3.getConstraints().get( 2 );

        assertEquals( returnValue1,
                      returnValue2 );
        assertFalse( returnValue1.equals( returnValue3 ) );
        assertFalse( returnValue2.equals( returnValue3 ) );
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            registerReadAccessor( context,
                                  pattern.getObjectType(),
                                  fieldName,
                                  (AcceptsReadAccessor) restriction );
        } else if ( restriction instanceof ReturnValueRestriction ) {
            constraint = new ReturnValueConstraint( extractor,
                                                    (ReturnValueRestriction) restriction );
            registerReadAccessor( context,
                                  pattern.getObjectType(),
                                  fieldName,
                                  (ReturnValueConstraint) constraint );
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                                                (LiteralRestriction) restriction );
        } else if ( restriction instanceof VariableRestriction ) {
            constraint = new VariableConstraint( extractor,
                                                 (VariableRestriction) restriction );
        } else if ( restriction instanceof ReturnValueRestriction ) {
            constraint = new ReturnValueConstraint( extractor,
                                                    (ReturnValueRestriction) restriction );
        } else {
            context.getErrors().add( new RuleError( context.getRule(),
                                                    fieldConstraintDescr,
                                                    null,
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                                                (LiteralRestriction) restriction );
        } else if ( restriction instanceof VariableRestriction ) {
            constraint = new VariableConstraint( extractor,
                                                 (VariableRestriction) restriction );
        } else if ( restriction instanceof ReturnValueRestriction ) {
            constraint = new ReturnValueConstraint( extractor,
                                                    (ReturnValueRestriction) restriction );
        } else {
            context.getErrors().add( new RuleError( context.getRule(),
                                                    fieldConstraintDescr,
                                                    null,
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                                                (LiteralRestriction) restriction );
        } else if ( restriction instanceof VariableRestriction ) {
            constraint = new VariableConstraint( extractor,
                                                 (VariableRestriction) restriction );
        } else if ( restriction instanceof ReturnValueRestriction ) {
            constraint = new ReturnValueConstraint( extractor,
                                                    (ReturnValueRestriction) restriction );
        } else {
            context.getErrors().add( new RuleError( context.getRule(),
                                                    fieldConstraintDescr,
                                                    null,
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        Rule rule2 = ((KnowledgePackageImp)pkg2).pkg.getRule( "rule1" );
        Rule rule3 = ((KnowledgePackageImp)pkg3).pkg.getRule( "rule1" );              
       
        // test return value
        Pattern p1 = ( Pattern ) rule1.getLhs().getChildren().get( 0 );
        ReturnValueConstraint rvc1 = ( ReturnValueConstraint ) p1.getConstraints().get( 1 );
        ReturnValueExpression rve1 = rvc1.getExpression();
       
        Pattern p2 = ( Pattern ) rule2.getLhs().getChildren().get( 0 );
        ReturnValueConstraint rvc2 = ( ReturnValueConstraint ) p2.getConstraints().get( 1 );
        ReturnValueExpression rve2 = rvc2.getExpression();
        assertNotSame( rve1, rve2 );
        assertEquals( rve1, rve2 );
       
        Pattern p3 = ( Pattern ) rule3.getLhs().getChildren().get( 0 );
        ReturnValueConstraint rvc3 = ( ReturnValueConstraint ) p3.getConstraints().get( 1 );
        ReturnValueExpression rve3 = rvc3.getExpression();               
        assertNotSame( rve1, rve3 );
        assertThat(rve1, not( equalTo( rve3 ) ) );
       
        // test inline eval
        PredicateConstraint pc1 = ( PredicateConstraint )  p1.getConstraints().get( 2 );
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        final PackageDescr packageDescr1 = new PackageDescr( "package1" );
        createReturnValueRule( packageDescr1,
                               " x + y " );
        builder1.addPackage( packageDescr1 );
        final Pattern pattern1 = (Pattern) builder1.getPackage().getRules()[0].getLhs().getChildren().get( 0 );
        final ReturnValueConstraint returnValue1 = (ReturnValueConstraint) pattern1.getConstraints().get( 2 );

        final PackageBuilder builder2 = new PackageBuilder();
        final PackageDescr packageDescr2 = new PackageDescr( "package2" );
        createReturnValueRule( packageDescr2,
                               " x + y " );
        builder2.addPackage( packageDescr2 );
        final Pattern pattern2 = (Pattern) builder2.getPackage().getRules()[0].getLhs().getChildren().get( 0 );
        final ReturnValueConstraint returnValue2 = (ReturnValueConstraint) pattern2.getConstraints().get( 2 );

        final PackageBuilder builder3 = new PackageBuilder();
        final PackageDescr packageDescr3 = new PackageDescr( "package3" );
        createReturnValueRule( packageDescr3,
                               " x - y " );
        builder3.addPackage( packageDescr3 );
        final Pattern pattern3 = (Pattern) builder3.getPackage().getRules()[0].getLhs().getChildren().get( 0 );
        final ReturnValueConstraint returnValue3 = (ReturnValueConstraint) pattern3.getConstraints().get( 2 );

        assertEquals( returnValue1,
                      returnValue2 );
        assertFalse( returnValue1.equals( returnValue3 ) );
        assertFalse( returnValue2.equals( returnValue3 ) );
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            registerReadAccessor( context,
                                  pattern.getObjectType(),
                                  fieldName,
                                  (VariableRestriction) restriction );
        } else if ( restriction instanceof ReturnValueRestriction ) {
            constraint = new ReturnValueConstraint( extractor,
                                                    (ReturnValueRestriction) restriction );
            registerReadAccessor( context,
                                  pattern.getObjectType(),
                                  fieldName,
                                  (ReturnValueConstraint) constraint );
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Related Classes of org.drools.rule.ReturnValueConstraint

  • org.drools.compiler.PackageBuilderTest
  • org.drools.reteoo.AlphaNodeTest
  • org.drools.rule.builder.dialect.java.JavaDialectBinaryEqualityTest
  • org.drools.rule.builder.PatternBuilder
  • org.drools.rule.ReturnValueRestriction.ReturnValueContextEntry
  • org.drools.RuntimeDroolsException
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