Package org.drools.rule

Examples of org.drools.rule.Pattern.addConstraint()

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        // ---------------
        final Pattern seatingPattern = new Pattern( 1,
                                                    this.seatingType,
                                                    "seating" );

        seatingPattern.addConstraint( getLiteralConstraint( seatingPattern,
                                                            "pathDone",
                                                            false,
                                                            this.booleanEqualEvaluator ) );

        rule.addPattern( seatingPattern );
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        // -----------
        final Pattern contextPattern = new Pattern( 0,
                                                    this.contextType,
                                                    "context" );

        contextPattern.addConstraint( getLiteralConstraint( contextPattern,
                                                            "state",
                                                            Context.CHECK_DONE,
                                                            this.integerEqualEvaluator ) );

        rule.addPattern( contextPattern );
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        // -------------
        final Pattern seatingPattern = new Pattern( 2,
                                                    this.seatingType,
                                                    null );

        seatingPattern.addConstraint( getBoundVariableConstraint( seatingPattern,
                                                                  "rightSeat",
                                                                  lastSeatDeclaration,
                                                                  this.integerEqualEvaluator ) );

        rule.addPattern( seatingPattern );
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        // -----------
        final Pattern contextPattern = new Pattern( 0,
                                                    this.contextType,
                                                    "context" );

        contextPattern.addConstraint( getLiteralConstraint( contextPattern,
                                                            "state",
                                                            Context.CHECK_DONE,
                                                            this.integerEqualEvaluator ) );

        rule.addPattern( contextPattern );
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        // context : Context( state == Context.PRINT_RESULTS )
        // -----------
        final Pattern contextPattern = new Pattern( 0,
                                                    this.contextType );

        contextPattern.addConstraint( getLiteralConstraint( contextPattern,
                                                            "state",
                                                            Context.PRINT_RESULTS,
                                                            this.integerEqualEvaluator ) );

        rule.addPattern( contextPattern );
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                                                           null );

        final LiteralConstraint constraint = new LiteralConstraint( extractor,
                                                                    evaluator,
                                                                    field );
        pattern.addConstraint( constraint );
        rule.addPattern( pattern );

        rule.setConsequence( new Consequence() {
            public void evaluate(final KnowledgeHelper knowledgeHelper,
                                 final org.drools.WorkingMemory workingMemory) throws Exception {
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        AfterEvaluatorDefinition evals = new AfterEvaluatorDefinition();
        ClassObjectType ot = new ClassObjectType(StockTick.class, true);
       
        Pattern a = new Pattern( 0, ot, "$a" );
        Pattern b = new Pattern( 1, ot, "$b" );
        b.addConstraint( new VariableConstraint(
                         new SelfReferenceClassFieldReader( StockTick.class, "this" ),
                         new VariableRestriction( null, a.getDeclaration(), evals.getEvaluator( ValueType.OBJECT_TYPE,
                                                                                                AfterEvaluatorDefinition.AFTER,
                                                                                                "-2,2" ) ) ) );
        Pattern c = new Pattern( 2, ot, "$c" );
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                         new SelfReferenceClassFieldReader( StockTick.class, "this" ),
                         new VariableRestriction( null, a.getDeclaration(), evals.getEvaluator( ValueType.OBJECT_TYPE,
                                                                                                AfterEvaluatorDefinition.AFTER,
                                                                                                "-2,2" ) ) ) );
        Pattern c = new Pattern( 2, ot, "$c" );
        c.addConstraint( new VariableConstraint(
                                                new SelfReferenceClassFieldReader( StockTick.class, "this" ),
                                                new VariableRestriction( null, a.getDeclaration(), evals.getEvaluator( ValueType.OBJECT_TYPE,
                                                                                                                       AfterEvaluatorDefinition.AFTER,
                                                                                                                       "-3,4" ) ) ) );
        Pattern d = new Pattern( 3, ot, "$d" );
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                                                new SelfReferenceClassFieldReader( StockTick.class, "this" ),
                                                new VariableRestriction( null, a.getDeclaration(), evals.getEvaluator( ValueType.OBJECT_TYPE,
                                                                                                                       AfterEvaluatorDefinition.AFTER,
                                                                                                                       "-3,4" ) ) ) );
        Pattern d = new Pattern( 3, ot, "$d" );
        d.addConstraint( new VariableConstraint(
                                                new SelfReferenceClassFieldReader( StockTick.class, "this" ),
                                                new VariableRestriction( null, b.getDeclaration(), evals.getEvaluator( ValueType.OBJECT_TYPE,
                                                                                                                       AfterEvaluatorDefinition.AFTER,
                                                                                                                       "1,2" ) ) ) );
        d.addConstraint( new VariableConstraint(
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        d.addConstraint( new VariableConstraint(
                                                new SelfReferenceClassFieldReader( StockTick.class, "this" ),
                                                new VariableRestriction( null, b.getDeclaration(), evals.getEvaluator( ValueType.OBJECT_TYPE,
                                                                                                                       AfterEvaluatorDefinition.AFTER,
                                                                                                                       "1,2" ) ) ) );
        d.addConstraint( new VariableConstraint(
                                                new SelfReferenceClassFieldReader( StockTick.class, "this" ),
                                                new VariableRestriction( null, c.getDeclaration(), evals.getEvaluator( ValueType.OBJECT_TYPE,
                                                                                                                       AfterEvaluatorDefinition.AFTER,
                                                                                                                       "2,3" ) ) ) );
        Pattern e = new Pattern( 4, ot, "$e" );
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