Package org.drools.rule

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

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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 Pattern contextPattern = new Pattern( 0,
                                                    this.contextType,
                                                    "context" );

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

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

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

        rule.addPattern( contextPattern );
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        setFieldDeclaration( seatingPattern,
                             "pid",
                             "seatingPid" );

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

        setFieldDeclaration( seatingPattern,
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        // rightGuestHobby:hobby )
        // ---------------
        final Pattern rightGuestPattern = new Pattern( 2,
                                                       this.guestType );

        rightGuestPattern.addConstraint( getBoundVariableConstraint( rightGuestPattern,
                                                                     "name",
                                                                     seatingRightGuestNameDeclaration,
                                                                     this.objectEqualEvaluator ) );

        setFieldDeclaration( rightGuestPattern,
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        setFieldDeclaration( leftGuestPattern,
                             "name",
                             "leftGuestName" );

        leftGuestPattern.addConstraint( getBoundVariableConstraint( rightGuestPattern,
                                                                    "hobby",
                                                                    rightGuestHobbyDeclaration,
                                                                    this.objectEqualEvaluator ) );

        leftGuestPattern.addConstraint( getBoundVariableConstraint( leftGuestPattern,
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        leftGuestPattern.addConstraint( getBoundVariableConstraint( rightGuestPattern,
                                                                    "hobby",
                                                                    rightGuestHobbyDeclaration,
                                                                    this.objectEqualEvaluator ) );

        leftGuestPattern.addConstraint( getBoundVariableConstraint( leftGuestPattern,
                                                                    "sex",
                                                                    rightGuestSexDeclaration,
                                                                    this.objectNotEqualEvaluator ) );

        rule.addPattern( leftGuestPattern );
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        // not ( Path( id == seatingId, guestName == leftGuestName) )
        // --------------
        final Pattern notPathPattern = new Pattern( 5,
                                                    this.pathType );

        notPathPattern.addConstraint( getBoundVariableConstraint( notPathPattern,
                                                                  "id",
                                                                  seatingIdDeclaration,
                                                                  this.integerEqualEvaluator ) );

        notPathPattern.addConstraint( getBoundVariableConstraint( notPathPattern,
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        notPathPattern.addConstraint( getBoundVariableConstraint( notPathPattern,
                                                                  "id",
                                                                  seatingIdDeclaration,
                                                                  this.integerEqualEvaluator ) );

        notPathPattern.addConstraint( getBoundVariableConstraint( notPathPattern,
                                                                  "guestName",
                                                                  leftGuestNameDeclaration,
                                                                  this.objectEqualEvaluator ) );
        final GroupElement notPath = GroupElementFactory.newNotInstance();
        notPath.addChild( notPathPattern );
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        // rightGuestHobby ) )
        // ------------
        final Pattern notChosenPattern = new Pattern( 6,
                                                      this.chosenType );

        notChosenPattern.addConstraint( getBoundVariableConstraint( notChosenPattern,
                                                                    "id",
                                                                    seatingIdDeclaration,
                                                                    this.integerEqualEvaluator ) );

        notChosenPattern.addConstraint( getBoundVariableConstraint( notChosenPattern,
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