Package org.drools.core.rule

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

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        ClassObjectType ot = new ClassObjectType(StockTick.class, true);
       
        Pattern a = new Pattern( 0, ot, "$a" );
        Pattern b = new Pattern( 1, ot, "$b" );

        b.addConstraint( new EvaluatorConstraint( new Declaration[] { a.getDeclaration() },
                                                  evals.getEvaluator( ValueType.OBJECT_TYPE,
                                                                      AfterEvaluatorDefinition.AFTER,
                                                                      "-2,2"),
                                                  new SelfReferenceClassFieldReader( StockTick.class, "this" ) ) );
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                                                                      AfterEvaluatorDefinition.AFTER,
                                                                      "-2,2"),
                                                  new SelfReferenceClassFieldReader( StockTick.class, "this" ) ) );

        Pattern c = new Pattern( 2, ot, "$c" );
        c.addConstraint( new EvaluatorConstraint( new Declaration[] { a.getDeclaration() },
                                                  evals.getEvaluator( ValueType.OBJECT_TYPE,
                                                                      AfterEvaluatorDefinition.AFTER,
                                                                      "-3,4"),
                                                  new SelfReferenceClassFieldReader( StockTick.class, "this" ) ) );
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                                                                      AfterEvaluatorDefinition.AFTER,
                                                                      "-3,4"),
                                                  new SelfReferenceClassFieldReader( StockTick.class, "this" ) ) );

        Pattern d = new Pattern( 3, ot, "$d" );
        d.addConstraint( new EvaluatorConstraint( new Declaration[] { b.getDeclaration() },
                                                  evals.getEvaluator( ValueType.OBJECT_TYPE,
                                                                      AfterEvaluatorDefinition.AFTER,
                                                                      "1,2"),
                                                  new SelfReferenceClassFieldReader( StockTick.class, "this" ) ) );
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                                                  evals.getEvaluator( ValueType.OBJECT_TYPE,
                                                                      AfterEvaluatorDefinition.AFTER,
                                                                      "1,2"),
                                                  new SelfReferenceClassFieldReader( StockTick.class, "this" ) ) );

        d.addConstraint( new EvaluatorConstraint( new Declaration[] { c.getDeclaration() },
                                                  evals.getEvaluator( ValueType.OBJECT_TYPE,
                                                                      AfterEvaluatorDefinition.AFTER,
                                                                      "2,3"),
                                                  new SelfReferenceClassFieldReader( StockTick.class, "this" ) ) );
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                                                                      AfterEvaluatorDefinition.AFTER,
                                                                      "2,3"),
                                                  new SelfReferenceClassFieldReader( StockTick.class, "this" ) ) );

        Pattern e = new Pattern( 4, ot, "$e" );
        e.addConstraint(new EvaluatorConstraint(new Declaration[]{d.getDeclaration()},
                evals.getEvaluator(ValueType.OBJECT_TYPE,
                        AfterEvaluatorDefinition.AFTER,
                        "1,10"),
                new SelfReferenceClassFieldReader(StockTick.class, "this")));
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        final QueryNameConstraint constraint = new QueryNameConstraint(extractor, queryDescr.getName());

        PatternBuilder.registerReadAccessor( context, queryObjectType, "name", constraint );

        // adds appropriate constraint to the pattern
        pattern.addConstraint( constraint );

        ObjectType argsObjectType = ClassObjectType.DroolsQuery_ObjectType;
       
        InternalReadAccessor arrayExtractor = PatternBuilder.getFieldReadAccessor( context, queryDescr, argsObjectType, "elements", null, true );
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        final FieldValue field = FieldFactory.getInstance().getFieldValue( "cheddar" );

        final MvelConstraint constraint = new MvelConstraintTestUtil("type == \"cheddar\"", field, extractor);

        pattern.addConstraint( constraint );
        rule.addPattern( pattern );

        rule.setConsequence( new Consequence() {
            public void evaluate(final KnowledgeHelper knowledgeHelper,
                                 final WorkingMemory workingMemory) throws Exception {
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        final FieldValue field = FieldFactory.getInstance().getFieldValue( "cheddar" );

        final MvelConstraint constraint = new MvelConstraintTestUtil("type == \"cheddar\"", field, extractor);

        pattern.addConstraint( constraint );
        rule1.addPattern( pattern );

        rule1.setConsequence( new Consequence() {
            private static final long serialVersionUID = 510l;
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        final FieldValue field2 = FieldFactory.getInstance().getFieldValue( "stilton" );

        final MvelConstraint constraint2 = new MvelConstraintTestUtil("type == \"stilton\"", field, extractor);

        pattern2.addConstraint( constraint2 );
        rule2.addPattern( pattern2 );

        rule2.setConsequence( new Consequence() {
            private static final long serialVersionUID = 510l;
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        final FieldValue field = FieldFactory.getInstance().getFieldValue( "cheddar" );

        final MvelConstraint constraint = new MvelConstraintTestUtil("type == \"cheddar\"", field, extractor);

        pattern.addConstraint( constraint );
        rule1.addPattern( pattern );

        rule1.setConsequence( new Consequence() {
            private static final long serialVersionUID = 510l;
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