Package org.drools.rule

Examples of org.drools.rule.Rule.addPattern()

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

        rule.addPattern( contextPattern );

        // ---------------
        // Seating( seatingId:id, seatingPid:pid, pathDone == false )
        // ---------------
        final Pattern seatingPattern = new Pattern( 1,
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        seatingPattern.addConstraint( getLiteralConstraint( seatingPattern,
                                                            "pathDone",
                                                            false,
                                                            this.booleanEqualEvaluator ) );

        rule.addPattern( seatingPattern );

        final Declaration seatingIdDeclaration = rule.getDeclaration( "seatingId" );
        final Declaration seatingPidDeclaration = rule.getDeclaration( "seatingPid" );

        // -----------
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        setFieldDeclaration( pathPattern,
                             "seat",
                             "pathSeat" );

        rule.addPattern( pathPattern );

        final Declaration pathGuestNameDeclaration = rule.getDeclaration( "pathGuestName" );
        final Declaration pathSeatDeclaration = rule.getDeclaration( "pathSeat" );
        // -------------
        // (not Path( id == seatingId, guestName == pathGuestName )
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        final GroupElement not = GroupElementFactory.newNotInstance();

        not.addChild( notPathPattern );

        rule.addPattern( not );

        // ------------
        // drools.assert( new Path( id, pathName, pathSeat ) );
        // ------------
        final Consequence consequence = new Consequence() {
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        contextPattern.addConstraint( getLiteralConstraint( contextPattern,
                                                            "state",
                                                            Context.MAKE_PATH,
                                                            this.integerEqualEvaluator ) );

        rule.addPattern( contextPattern );
        final Declaration contextDeclaration = rule.getDeclaration( "context" );

        // ---------------
        // seating : Seating( pathDone == false )
        // ---------------
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        seatingPattern.addConstraint( getLiteralConstraint( seatingPattern,
                                                            "pathDone",
                                                            false,
                                                            this.booleanEqualEvaluator ) );

        rule.addPattern( seatingPattern );

        final Declaration seatingDeclaration = rule.getDeclaration( "seating" );

        // ------------
        // context.setName( Context.CHECK_DONE );
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        contextPattern.addConstraint( getLiteralConstraint( contextPattern,
                                                            "state",
                                                            Context.CHECK_DONE,
                                                            this.integerEqualEvaluator ) );

        rule.addPattern( contextPattern );
        final Declaration contextDeclaration = rule.getDeclaration( "context" );

        // ---------------
        // LastSeat( lastSeat: seat )
        // ---------------
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        setFieldDeclaration( lastSeatPattern,
                             "seat",
                             "lastSeat" );

        rule.addPattern( lastSeatPattern );
        final Declaration lastSeatDeclaration = rule.getDeclaration( "lastSeat" );
        // -------------
        // Seating( rightSeat == lastSeat )
        // -------------
        final Pattern seatingPattern = new Pattern( 2,
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        seatingPattern.addConstraint( getBoundVariableConstraint( seatingPattern,
                                                                  "rightSeat",
                                                                  lastSeatDeclaration,
                                                                  this.integerEqualEvaluator ) );

        rule.addPattern( seatingPattern );

        // ------------
        // context.setName( Context.PRINT_RESULTS );
        // ------------
        final Consequence consequence = new Consequence() {
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        contextPattern.addConstraint( getLiteralConstraint( contextPattern,
                                                            "state",
                                                            Context.CHECK_DONE,
                                                            this.integerEqualEvaluator ) );

        rule.addPattern( contextPattern );
        final Declaration contextDeclaration = rule.getDeclaration( "context" );

        // ------------
        // context.setName( Context.ASSIGN_SEATS );
        // ------------
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