Examples of com.dtrules.interpreter.IRObject

com.dtrules.interpreter.IRObject
Every Rules Engine object implements the IRObject interface. This interface is used by the Interpreter to execute objects, and by the implementation of operators to manipulate objects.

This interface implements the necessary methods for doing the data conversions necessary when extracting data from the Rules Engine state after having executed a set of rules. @author Paul Snow

    static class Forfirst extends ROperator {
        Forfirst(){super("forfirst");}


        public void execute(DTState state) throws RulesException {
            RArray   array = state.datapop().rArrayValue();
            IRObject test  = state.datapop();
            IRObject body  = state.datapop();
            Iterator<REntity> ie = (Iterator<REntity>) array.getIterator();
            while(ie.hasNext()){
                state.entitypush(ie.next());
                test.execute(state);
                if(state.datapop().booleanValue()){
                    body.execute(state);
                    state.entitypop();
                    return;
                }
                state.entitypop();
            }

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    static class ForFirstElse extends ROperator {
        ForFirstElse(){super("forfirstelse");}


        public void execute(DTState state) throws RulesException {
            RArray   array = state.datapop().rArrayValue();
            IRObject test  = state.datapop();
            IRObject body2 = state.datapop();
            IRObject body1 = state.datapop();
            for(IRObject obj : array) {
                IREntity e = obj.rEntityValue();
                state.entitypush(e);
                test.execute(state);
                if(state.datapop().booleanValue()){
                    body1.execute(state);
                    state.entitypop();
                    return;
                }
                state.entitypop();
            }

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        public void execute(DTState state) throws RulesException {
            int         limit     = state.datapop().intValue();
            int         increment = state.datapop().intValue();
            int         start     = state.datapop().intValue();
            IRObject    body      = state.datapop();
            if(increment>0){
                for(int i = start;i<limit;i+=increment){
                    state.cpush(RInteger.getRIntegerValue(i));
                    body.execute(state);
                    state.cpop();
                }
            }else{
                for(int i = start;i>limit;i+=increment){
                    state.cpush(RInteger.getRIntegerValue(i));
                    body.execute(state);
                    state.cpop();
                }
            }
        }

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     */
    static class Allocate extends ROperator {
        Allocate(){super("allocate"); alias("cpush");}


        public void execute(DTState state) throws RulesException {
            IRObject v = state.datapop();
            if(state.testState(DTState.TRACE)){
                state.traceInfo("allocate", "value",v.stringValue(),null);
            }
            state.cpush(v);
        }

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    static class Localfetch extends ROperator {
        Localfetch(){super("local@");}


        public void execute(DTState state) throws RulesException {
            int      index = state.datapop().intValue();
            IRObject value = state.getFrameValue(index);
            if(state.testState(DTState.TRACE)){
                state.traceInfo("local_fetch", "index",index+"","value",value.stringValue(),null);
            }
            state.datapush(value);
        }

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    static class Localstore extends ROperator {
        Localstore(){super("local!");}


        public void execute(DTState state) throws RulesException {
            int      index = state.datapop().intValue();
            IRObject value = state.datapop();
            if(state.testState(DTState.TRACE)){
                state.traceInfo("local_store", "index",index+"","value",value.stringValue(),null);
            }
            state.setFrameValue(index, value);
        }

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    static class Lookup extends ROperator {
        Lookup(){super("lookup");}


        public void execute(DTState state) throws RulesException {
            RName name = state.datapop().rNameValue();
            IRObject value = state.find(name);
            if(value == null){
                throw new RulesException(
                        "undefined",
                        "Lookup",
                        "Could not find a value for "+name.stringValue()+" in the current context."

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       */
    static class Greaterthan extends ROperator {
      Greaterthan(){super(">");}


      public void execute(DTState state) throws RulesException {
          IRObject o2 = state.datapop();
          IRObject o1 = state.datapop();
        long number2 = o2.longValue();
        long number1 = o1.longValue();
        state.datapush(RBoolean.getRBoolean(number1 > number2));
      }

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       */
    static class Booleanequal extends ROperator {
      Booleanequal(){super("b="); alias("beq");}


      public void execute(DTState state) throws RulesException {
          IRObject o2 = state.datapop();
          IRObject o1 = state.datapop();
          boolean r = false;
          try{
              r = o1.booleanValue() == o2.booleanValue();
          }catch(RulesException e){}   // Ignore any failures, and simply fail.
          
        state.datapush(RBoolean.getRBoolean(r)  );
      }

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        FAdd(){
            super("f+");alias("fadd");
        }


        public void execute(DTState state) throws RulesException {
            IRObject b = state.datapop();
            IRObject a = state.datapop();
            state.datapush(RDouble.getRDoubleValue(a.doubleValue()+b.doubleValue()));
        }

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