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

     * @param name
     * @return
     * @throws RulesException
     */
    public RDecisionTable getDecisionTable(RName name)throws RulesException{
        IRObject dt = decisiontables.get(name);
        if(dt==null || dt.type()!=IRObject.iDecisiontable){
            return null;
        }
        return (RDecisionTable) dt;
    }

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     * it.
     * @param dt
     * @return
     */
    public RDecisionTable findDecisionTable(RName dt){
        IRObject dttable = decisiontables.get(dt);
        if(dttable==null || dttable.type()!=IRObject.iDecisiontable){
            return null;
        }
        return (RDecisionTable) dttable;
    }

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    static class SetXmlAttribute extends ROperator {
      SetXmlAttribute(){super("setxmlattribute");}


      @Override
            public void execute(DTState state) throws RulesException {
        IRObject  value     = state.datapop();
        IRObject  attribute = state.datapop();
        XMLNode   xmlNode   = state.datapop().xmlTagValue();
        if(xmlNode != null){
            state.traceInfo("SetXmlAttribute","tag",xmlNode.getTag(),"attribute",attribute.stringValue(),"value",value.stringValue(), null);
            xmlNode.getAttribs().put(attribute.stringValue(), value.stringValue());
        }
      }

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      */
     static class GetWithKey extends ROperator {
         GetWithKey(){ super("getwithkey");}
         
         public void execute(DTState state) throws RulesException {
             IRObject key = state.datapop();
             RTable rtable = state.datapop().rTableValue();
             state.datapush(rtable.getValue(key));
         }

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     static class SetWithKey extends ROperator {
         SetWithKey(){ super("setwithkey"); }
      
         public void execute(DTState state) throws RulesException {
             
             IRObject   v      = state.datapop();                // Get the value to store
             IRObject   key    = state.datapop().rNameValue();
             RTable     rtable = state.datapop().rTableValue();
             rtable.setValue(key,v);
             
         }

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     static class SetWithKeys extends ROperator {
         SetWithKeys(){ super("setwithkeys");}
         
         public void execute(DTState state) throws RulesException {
             int       cnt = 0;                             // We keep a count of the keys.
             IRObject  v   = state.datapop();               // Get the value to store
             int       d   = state.ddepth()-1;              // Get current depth of data stack less one for the value.
             
             while(state.getds(--d).type()==iTable)cnt++;   // Count the keys (index1, index2, etc.)
             
             if(cnt != 1){
                 IRObject []keys = new IRObject[cnt];           // Get an array big enough to hold the keys
                 
                 for(int i=0;i<cnt;i++){                        // Get all the keys off the data stack
                    keys[i]= state.datapop();
                 }
                 
                 RTable rtable = state.datapop().rTableValue();
                 
                 rtable.setValue(state,keys, v);                // Set the value.
             }else{
                 IRObject   key    = state.datapop();
                 RTable     rtable = state.datapop().rTableValue();
                 rtable.setValue(key,v);
             }

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     * @return Returns null if no entity was found.
     * @throws RulesException
     */
    public IREntity findEntity(AutoDataMap autoDataMap, String entity, Label label, Object key) {
       IREntity e    = null;       
       IRObject iKey = iconvert(key);
       try {
           if(label.isSingular()){                          // If singular, look for an instance
               e = autoDataMap.getEntities().get(entity); //   on the entity stack.
               if(e==null){                               // None found? create one.
                   e = autoDataMap.getSession().getState().findEntity(entity+"."+entity);
                   if(e==null){
                      e = autoDataMap.getSession().createEntity(null,entity);
                      autoDataMap.getEntities().put(entity,e);   // Remember the one we created, so we 
                   }   
               }                                              //   don't create another one.
           }else {
               String skey = entity+"$"+iKey.stringValue(); 
               if(key!=null && 
                   !(key instanceof String 
                       && ((String)key).length()==0)) {                // NOTE: We are NOT allowing "" as a key here!
                                                                         // If so, construct a key for that entity
                   e = (IREntity)autoDataMap.getEntities().get(skey);    //    and look for it.

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            RName rname = null;
            Object object = autoDataMap.getCurrentObject();
            if(object instanceof IREntity){
                IREntity entity = (IREntity) object;
                rname = mapName(autoDataMap, labelMap, node.getLabel());
                IRObject olist = entity.get(rname);
                if(olist != null && olist.type() == IRObject.iArray){
                    list = olist.rArrayValue();
                }
            }
            
            node.setTargetList(list);

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            if(tgtObj == null) return;
            IREntity      entity     = (IREntity) tgtObj;
            RName         attribute  = RName.getRName(node.getAttribute().getName());
            REntityEntry  entry      = entity.getEntry(attribute);
            if(entry != null && entry.writable){
                IRObject  value  = entity.get(node.getAttribute().getName());
                Object    v      = convert(value);    
                node.setData(v);
            }
        }

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        // We get the object first, because if the LabelMap is going to get cached, it
        // is going to get cached as a result of this call.  
        autoDataMap.pushMark();
        List<Object> results = (List<Object>) node.getChild().mapNode(autoDataMap, labelMap);
        IRObject ref = null;
        if(results != null && results.size()==1){
            ref = (IRObject) results.get(0);
        }
        autoDataMap.pop();

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