C# Rule.getBinding方法代码示例

 /// <summary> the method is responsible for compiling a TestCE pattern to a testjoin node.
 /// It uses the globally declared prevCE and prevJoinNode
 /// </summary>
 public virtual BaseJoin compileJoin(ICondition condition, int position, Rule.IRule rule)
 {
     TestCondition tc = (TestCondition) condition;
     ShellFunction fn = (ShellFunction) tc.Function;
     fn.lookUpFunction(ruleCompiler.Engine);
     IParameter[] oldpm = fn.Parameters;
     IParameter[] pms = new IParameter[oldpm.Length];
     for (int ipm = 0; ipm < pms.Length; ipm++)
     {
         if (oldpm[ipm] is ValueParam)
         {
             pms[ipm] = ((ValueParam) oldpm[ipm]).cloneParameter();
         }
         else if (oldpm[ipm] is BoundParam)
         {
             BoundParam bpm = (BoundParam) oldpm[ipm];
             // now we need to resolve and setup the BoundParam
             Binding b = rule.getBinding(bpm.VariableName);
             BoundParam newpm = new BoundParam(b.LeftRow, b.LeftIndex, 9, bpm.ObjectBinding);
             newpm.VariableName = bpm.VariableName;
             pms[ipm] = newpm;
         }
     }
     BaseJoin joinNode = null;
     if (tc.Negated)
     {
         joinNode = new NTestNode(ruleCompiler.Engine.nextNodeId(), fn.Function, pms);
     }
     else
     {
         joinNode = new TestNode(ruleCompiler.Engine.nextNodeId(), fn.Function, pms);
     }
     ((TestNode) joinNode).lookUpFunction(ruleCompiler.Engine);
     return joinNode;
 }

 /// <summary> 
 /// </summary>
 /// <param name="">util
 /// 
 /// </param>
 public virtual void compileBinding(Rule.IRule util)
 {
     List<object> list = new List<Object>();
     for (int idx = 0; idx < slots.Length; idx++)
     {
         if (slots[idx].Value is BoundParam)
         {
             hasBinding_Renamed_Field = true;
             list.Add(slots[idx]);
             BoundParam bp = (BoundParam) slots[idx].Value;
             Binding bd = util.getBinding(bp.VariableName);
             if (bd != null)
             {
                 bp.rowId = bd.LeftRow;
                 bp.column = bd.LeftIndex;
             }
         }
     }
     if (list.Count > 0)
     {
         Slot[] ary = new Slot[list.Count];
         list.CopyTo(ary,0);
         boundSlots = ary;
     }
 }

        /// <summary>
        /// Compiles the constraint.
        /// </summary>
        /// <param name="cnstr">The CNSTR.</param>
        /// <param name="templ">The templ.</param>
        /// <param name="rule">The rule.</param>
        /// <param name="position">The position.</param>
        /// <returns></returns>
        public virtual BaseAlpha2 compileConstraint(PredicateConstraint cnstr, ITemplate templ, Rule.IRule rule, int position)
        {
            BaseAlpha2 current = null;
            // for now we expect the user to write the predicate in this
            // way (> ?bind value), where the binding is first. this
            // needs to be updated so that we look at the order of the
            // parameters and set the node appropriately

            // we only create an AlphaNode if the predicate isn't
            // joining 2 bindings.
            if (!cnstr.PredicateJoin)
            {
                if (ConversionUtils.isPredicateOperatorCode(cnstr.FunctionName))
                {
                    int oprCode = ConversionUtils.getOperatorCode(cnstr.FunctionName);
                    Slot sl = (Slot) templ.getSlot(cnstr.Name).Clone();
                    Object sval = ConversionUtils.convert(sl.ValueType, cnstr.Value);
                    sl.Value = sval;
                    // create the alphaNode
                    if (rule.RememberMatch)
                    {
                        current = new AlphaNode(engine.nextNodeId());
                    }
                    else
                    {
                        current = new NoMemANode(engine.nextNodeId());
                    }
                    current.Slot = sl;
                    current.Operator = oprCode;
                    current.incrementUseCount();
                    // we increment the node use count when when create a new
                    // AlphaNode for the LiteralConstraint
                    templ.getSlot(sl.Id).incrementNodeCount();
                }
                else
                {
                    // the function isn't a built in predicate function that
                    // returns boolean true/false. We look up the function
                    IFunction f = engine.findFunction(cnstr.FunctionName);
                    if (f != null)
                    {
                        // we create the alphaNode if a function is found and
                        // the return type is either boolean primitive or object
                        if (f.ReturnType == Constants.BOOLEAN_PRIM_TYPE || f.ReturnType != Constants.BOOLEAN_OBJECT)
                        {
                            // TODO - need to implement it
                        }
                        else
                        {
                            // the function doesn't return boolean, so we have to notify
                            // the listeners the condition is not valid
                            CompileMessageEventArgs ce = new CompileMessageEventArgs(this, EventType.FUNCTION_INVALID);
                            ce.Message = INVALID_FUNCTION + " " + f.ReturnType; //$NON-NLS-1$
                            notifyListener(ce);
                        }
                    }
                    else
                    {
                        // we need to notify listeners the function wasn't found
                        CompileMessageEventArgs ce = new CompileMessageEventArgs(this, EventType.FUNCTION_NOT_FOUND);
                        ce.Message = FUNCTION_NOT_FOUND + " " + cnstr.FunctionName;
                        notifyListener(ce);
                    }
                }
            }
            Binding bind = new Binding();
            bind.VarName = cnstr.VariableName;
            bind.LeftRow = position;
            bind.LeftIndex = templ.getSlot(cnstr.Name).Id;
            bind.RowDeclared = position;
            // we only Add the binding to the map if it doesn't already exist
            if (rule.getBinding(cnstr.VariableName) == null)
            {
                rule.addBinding(cnstr.VariableName, bind);
            }
            return current;
        }

 public virtual void configure(Rete engine, Rule.IRule util)
 {
     if (this.engine == null)
     {
         this.engine = engine;
     }
     for (int idx = 0; idx < params_Renamed.Length; idx++)
     {
         if (params_Renamed[idx] is BoundParam)
         {
             // we need to set the row value if the binding is a slot or fact
             BoundParam bp = (BoundParam) params_Renamed[idx];
             Binding b1 = util.getBinding(bp.VariableName);
             if (b1 != null)
             {
                 bp.Row = b1.LeftRow;
                 if (b1.LeftIndex == - 1)
                 {
                     bp.setObjectBinding(true);
                 }
             }
         }
     }
 }