Package org.drools.rule

Examples of org.drools.rule.VariableConstraint

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        return current;
    }

    private boolean isIndexable(final BetaNodeFieldConstraint constraint) {
        if ( constraint instanceof VariableConstraint ) {
            final VariableConstraint variableConstraint = (VariableConstraint) constraint;
            return (variableConstraint.getEvaluator().getOperator() == Operator.EQUAL);
        } else {
            return false;
        }
    }
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            LinkedListEntry entry = (LinkedListEntry) this.constraints.getFirst();
            final List list = new ArrayList();

            for ( int pos = 0; pos <= this.indexed; pos++ ) {
                final Constraint constraint = (Constraint) entry.getObject();
                final VariableConstraint variableConstraint = (VariableConstraint) constraint;
                final FieldIndex index = new FieldIndex( variableConstraint.getFieldExtractor(),
                                                         variableConstraint.getRequiredDeclarations()[0],
                                                         variableConstraint.getEvaluator() );
                list.add( index );
                entry = (LinkedListEntry) entry.getNext();
            }

            final FieldIndex[] indexes = (FieldIndex[]) list.toArray( new FieldIndex[list.size()] );
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        builder1.addPackage( packageDescr1 );
        if ( builder1.hasErrors() ) {
            fail( builder1.getErrors().toString() );
        }
        final Pattern pattern1 = (Pattern) builder1.getPackage().getRules()[0].getLhs().getChildren().get( 0 );
        final VariableConstraint returnValue1 = (VariableConstraint) pattern1.getConstraints().get( 0 );

        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 VariableConstraint returnValue2 = (VariableConstraint) pattern2.getConstraints().get( 0 );

        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 VariableConstraint returnValue3 = (VariableConstraint) pattern3.getConstraints().get( 0 );

        assertEquals( returnValue1,
                      returnValue2 );
        assertFalse( returnValue1.equals( returnValue3 ) );
        assertFalse( returnValue2.equals( returnValue3 ) );
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        out.writeObject(conf);
    }

    public  static boolean isIndexable(final BetaNodeFieldConstraint constraint) {
        if ( constraint instanceof VariableConstraint  ) {
            final VariableConstraint variableConstraint = (VariableConstraint) constraint;
            if ( (!(variableConstraint.getRestriction() instanceof UnificationRestriction )) ) {
                return (variableConstraint.getEvaluator().getOperator() == Operator.EQUAL);
            }
        }
       
        return false;
    }
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    }

    public BetaMemory createBetaMemory(final RuleBaseConfiguration config) {
        BetaMemory memory;
        if ( this.indexed ) {
            final VariableConstraint variableConstraint = (VariableConstraint) this.constraint;
            final FieldIndex index = new FieldIndex( variableConstraint.getFieldExtractor(),
                                                     variableConstraint.getRequiredDeclarations()[0],
                                                     variableConstraint.getEvaluator() );
            LeftTupleMemory tupleMemory;
            if ( this.conf.isIndexLeftBetaMemory() ) {
                tupleMemory = new LeftTupleIndexHashTable( new FieldIndex[]{index} );
            } else {
                tupleMemory = new LeftTupleList();
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        BetaMemory memory;

        final List list = new ArrayList( 2 );
        if ( this.indexed0 ) {
            final VariableConstraint variableConstraint = (VariableConstraint) this.constraint0;
            final FieldIndex index = new FieldIndex( variableConstraint.getFieldExtractor(),
                                                     variableConstraint.getRequiredDeclarations()[0],
                                                     variableConstraint.getEvaluator() );
            list.add( index );

        }

        if ( this.indexed1 ) {
            final VariableConstraint variableConstraint = (VariableConstraint) this.constraint1;
            final FieldIndex index = new FieldIndex( variableConstraint.getFieldExtractor(),
                                                     variableConstraint.getRequiredDeclarations()[0],
                                                     variableConstraint.getEvaluator() );
            list.add( index );
        }

        if ( this.indexed2 ) {
            final VariableConstraint variableConstraint = (VariableConstraint) this.constraint2;
            final FieldIndex index = new FieldIndex( variableConstraint.getFieldExtractor(),
                                                     variableConstraint.getRequiredDeclarations()[0],
                                                     variableConstraint.getEvaluator() );
            list.add( index );
        }

        if ( !list.isEmpty() ) {
            final FieldIndex[] indexes = (FieldIndex[]) list.toArray( new FieldIndex[list.size()] );
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    private void gatherTemporalRelationships(List< ? > constraints,
                                             Map<Declaration, Interval> temporal) {
        for ( Object obj : constraints ) {
            if ( obj instanceof VariableConstraint ) {
                VariableConstraint constr = (VariableConstraint) obj;
                if ( constr.isTemporal() ) {
                    // if a constraint already exists, calculate the intersection
                    Declaration target = constr.getRequiredDeclarations()[0];
                    // only calculate relationships to other event patterns
                    if( target.isPatternDeclaration() && target.getPattern().getObjectType().isEvent() ) {
                        Interval interval = temporal.get( target );
                        if ( interval == null ) {
                            interval = constr.getInterval();
                            temporal.put( target,
                                          interval );
                        } else {
                            interval.intersect( constr.getInterval() );
                        }
                    }
                }
            } else if ( obj instanceof AbstractCompositeConstraint ) {
                gatherTemporalRelationships( Arrays.asList( ((AbstractCompositeConstraint) obj).getBetaConstraints() ),
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        BetaMemory memory;

        final List list = new ArrayList( 2 );
        if ( this.indexed0 ) {
            final VariableConstraint variableConstraint = (VariableConstraint) this.constraint0;
            final FieldIndex index = new FieldIndex( variableConstraint.getFieldExtractor(),
                                                     variableConstraint.getRequiredDeclarations()[0],
                                                     variableConstraint.getEvaluator() );
            list.add( index );

        }

        if ( this.indexed1 ) {
            final VariableConstraint variableConstraint = (VariableConstraint) this.constraint1;
            final FieldIndex index = new FieldIndex( variableConstraint.getFieldExtractor(),
                                                     variableConstraint.getRequiredDeclarations()[0],
                                                     variableConstraint.getEvaluator() );
            list.add( index );
        }

        if ( this.indexed2 ) {
            final VariableConstraint variableConstraint = (VariableConstraint) this.constraint2;
            final FieldIndex index = new FieldIndex( variableConstraint.getFieldExtractor(),
                                                     variableConstraint.getRequiredDeclarations()[0],
                                                     variableConstraint.getEvaluator() );
            list.add( index );
        }

        if ( this.indexed3 ) {
            final VariableConstraint variableConstraint = (VariableConstraint) this.constraint3;
            final FieldIndex index = new FieldIndex( variableConstraint.getFieldExtractor(),
                                                     variableConstraint.getRequiredDeclarations()[0],
                                                     variableConstraint.getEvaluator() );
            list.add( index );
        }

        if ( !list.isEmpty() ) {
            final FieldIndex[] indexes = (FieldIndex[]) list.toArray( new FieldIndex[list.size()] );
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        final Declaration declaration = new Declaration( "age",
                                                         ageExtractor,
                                                         pattern );

        final VariableConstraint variableConstraint = new VariableConstraint( priceExtractor,
                                                                              declaration,
                                                                              equals.getEvaluator( ValueType.PINTEGER_TYPE,
                                                                                                   Operator.EQUAL ) );
        final RuleBaseConfiguration configuration = new RuleBaseConfiguration();
        configuration.setIndexRightBetaMemory( false );
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                                                                getClass().getClassLoader() );

        Evaluator evaluator = getEvaluator( clazz,
                                            evaluatorString );

        return new VariableConstraint( extractor,
                                       declaration,
                                       evaluator );
    }
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Related Classes of org.drools.rule.VariableConstraint

  • org.drools.common.BaseBetaConstraintsTest
  • org.drools.common.DefaultBetaConstraints
  • org.drools.common.DefaultBetaConstraintsTest
  • org.drools.common.DoubleBetaConstraints
  • org.drools.common.DoubleBetaConstraintsTest
  • org.drools.common.QuadroupleBetaConstraints
  • org.drools.common.QuadroupleBetaConstraintsTest
  • org.drools.common.SingleBetaConstraints
  • org.drools.common.SingleBetaConstraintsTest
  • org.drools.common.TripleBetaConstraints
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