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 Get    extends ROperator {
        Get(){super("get");}
        public void execute(DTState state) throws RulesException {
          RName    n = state.datapop().rNameValue();
            IREntity e = state.datapop().rEntityValue();
            IRObject v = e.get(n);
            state.datapush(v);
        }

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        put(null,name,this);                         //Patch up the self reference to point to self.
        put(null,mappingKey,RNull.getRNull());       //Clear the mapping Key


        for(int i=0;i<values.size();i++){
            IRObject value     = values.get(i);
            if(value == this){          // make a clone of everything one level down, but don't clone ourselves.            
                values.set(i,value);    // The clone references the same entity
            }else{
                values.set(i,value.clone(s));
            }
        }
   }

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  public String toString(){
    String v = name.stringValue()+" = {";
        Iterator<RName> ia = getAttributeIterator();
        while(ia.hasNext()){
            RName    n = ia.next();
            IRObject o = get(n);
            if(o==null){                // Protect ourselves from nulls.
                o = RNull.getRNull();
            }
            v +=n.stringValue()+" = "+get(n).stringValue()+"  ";
        }

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    if (attr != null){        
        attribs.remove("set attribute");
      // Look and see if we have an attribute name defined.
            if(body!=null){
          RName a = RName.getRName(attr);                 
          IRObject value;
                     
                    IREntity enclosingEntity = session.getState().findEntity(a);
                    if(enclosingEntity==null){
                        throw new Exception ("No Entity is in the context that defines "+ a.stringValue());
                    }

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    RName listname   = RName.getRName(e.getName().stringValue()+"s");
        
        // First add this entity to any list found on the entity stack.
        for(int i=0; i< state.edepth(); i++){
            // Look for all Array Lists on the Entity Stack that look like lists of this Entity
            IRObject elist = state.getes(i).get(listname);
            if(elist!=null && elist.type()==IRObject.iArray){
                // If not a member of this list, then add it.
                if(!((RArray)elist).contains(e)){
                   ((RArray)elist).add(e);
                }
            }

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     * @return
     */
    IREntity getInstance(IRSession s)throws RulesException{
        if(number.equals("1"))return entity;
        DTState state = s.getState();
        IRObject rarray = state.find(RName.getRName(name+"s"));
        
        IREntity newentity = (IREntity) entity.clone(s);
        if(rarray!=null && rarray.type() ==IRObject.iArray){
           ((RArray)rarray).add(newentity); 
        }
        return newentity;
    }

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    if ((attr = (String) attribs.get("set attribute"))!=null){        
      // Look and see if we have an attribute name defined.
        {  
          RName a = RName.getRName(attr);                 
          IRObject value;
                     
                    IREntity enclosingEntity = session.getState().findEntity(a);
                    if(enclosingEntity!=null){

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    }
        // First add this entity to any list found on the entity stack.
        for(int i=0; i< state.edepth(); i++){
            // Look for all Array Lists on the Entity Stack that look like lists of this Entity
            IREntity entity = state.getes(i);
            IRObject elist = entity.get(listname);
            if(elist!=null && elist.type()==IRObject.iArray){
                // If not a member of this list, then add it.
                if(!((RArray)elist).contains(e)){
                   ((RArray)elist).add(e);
                }
            }

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     * Creates and returns a new Decision Table object.
     * @param name -- The name of the new decision table.
     * @return -- The new decision table
     */
    public RDecisionTable newDecisionTable(RName name, IRSession session)throws RulesException{
        IRObject table = decisiontables.get(name);
        if(table !=null && table.type() != IRObject.iDecisiontable){
            throw new RulesException("ParsingError","New Decision Table","For some reason, "+name.stringValue()+" isn't a decision table");
        }
        if(table != null){
            session.getState().debug("Overwritting the Decision Table: "+name.stringValue());
        }

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    /**
     * Delete Decision Table doesn't really delete the decision table, but removes it
     * from the structures in the entityfactory.
     */
    public void deleteDecisionTable(RName name)throws RulesException {
        IRObject table = getDecisionTable(name);
        if(table==null)return;
        decisiontables.removeAttribute(name);
        decisiontablelist.remove(name);
    }

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