예제 #1
0
 internal void CacheDelegateForType(Type anotherDelegateType, DelegateTemplate delegateType)
 {
     this.cachedDelSamples[anotherDelegateType] = delegateType;
 }
예제 #2
0
        public Delegate MakeDelegate(Type targetDelegateType)
        {
            //check if we already has cache delegate for handle the targetDelegateType
            //if not found then create a new one

            DelegateTemplate foundTemplate;

            if (this._context.GetCacheDelegateForType(targetDelegateType, out foundTemplate))
            {
                //found sample
                //the create new holder from sample template
                return(foundTemplate.CreateNewDelegate(targetDelegateType, this));
            }
            //----------------------------------------------------------------------------------

            if (targetDelegateType.BaseType != typeof(MulticastDelegate))
            {
                throw new ApplicationException("Not a delegate.");
            }

            MethodInfo invoke = targetDelegateType.GetMethod("Invoke");

            if (invoke == null)
            {
                throw new ApplicationException("Not a delegate.");
            }

            ParameterInfo[] invokeParams = invoke.GetParameters();
            int             argCount     = invokeParams.Length;
            Type            returnType   = invoke.ReturnType;
            bool            returnVoid   = returnType == typeof(void);

            Type[] typelist = null;
            if (returnVoid)
            {
                typelist = new Type[argCount];
                for (int i = 0; i < argCount; ++i)
                {
                    typelist[i] = invokeParams[i].ParameterType;
                }
            }
            else
            {
                typelist = new Type[argCount + 1]; //+1 for return type
                for (int i = 0; i < argCount; ++i)
                {
                    typelist[i] = invokeParams[i].ParameterType;
                }
                typelist[argCount] = returnType;
            }
            //----------------------------------
            //create delegate holder
            //you can add more than 1
            Type delHolderType = null;

            switch (argCount)
            {
            case 0:
            {
                //0 input
                delHolderType = returnVoid ?
                                typeof(ActionDelegateHolder) :
                                typeof(FuncDelegateHolder <>).MakeGenericType(typelist);
            } break;

            case 1:
            {
                //1 input
                delHolderType = returnVoid ?
                                typeof(ActionDelegateHolder <>).MakeGenericType(typelist) :
                                typeof(FuncDelegateHolder <,>).MakeGenericType(typelist);
            } break;

            case 2:
            {
                delHolderType = returnVoid ?
                                typeof(ActionDelegateHolder <,>).MakeGenericType(typelist) :
                                typeof(FuncDelegateHolder <, ,>).MakeGenericType(typelist);
            } break;

            case 3:
            {
                delHolderType = returnVoid ?
                                typeof(ActionDelegateHolder <, ,>).MakeGenericType(typelist) :
                                typeof(FuncDelegateHolder <, , ,>).MakeGenericType(typelist);
            } break;

            case 4:
            {
                delHolderType = returnVoid ?
                                typeof(ActionDelegateHolder <, , ,>).MakeGenericType(typelist) :
                                typeof(FuncDelegateHolder <, , , ,>).MakeGenericType(typelist);
            } break;

            default:
            {
                //create more if you want
                throw new NotSupportedException();
            }
            }
            //----------------------------------
            //create sample
            DelegateTemplate newTemplate = new DelegateTemplate(
                delHolderType,
                Activator.CreateInstance(delHolderType) as DelegateHolder);

            //cache
            this._context.CacheDelegateForType(targetDelegateType, newTemplate);

            //new delegate created from sample
            return(newTemplate.CreateNewDelegate(targetDelegateType, this));
        }
예제 #3
0
        //----------------------------------------------------------------------------------------


        internal bool GetCacheDelegateForType(Type anotherDelegateType, out DelegateTemplate delSample)
        {
            return(this.cachedDelSamples.TryGetValue(anotherDelegateType, out delSample));
        }