Ejemplo n.º 1
0
        protected override bool TryCreateProxy(object source, ExpressionSourceDescription description, out ISourceProxy proxy)
        {
            proxy = null;
            var expression            = description.Expression;
            List <ISourceProxy> list  = new List <ISourceProxy>();
            List <Path>         paths = this.pathFinder.FindPaths(expression);

            foreach (Path path in paths)
            {
                if (!path.IsStatic)
                {
                    if (source == null)
                    {
                        continue;//ignore the path
                    }
                    MemberNode memberNode = path[0] as MemberNode;
                    if (memberNode != null && memberNode.MemberInfo != null && !memberNode.MemberInfo.DeclaringType.IsAssignableFrom(source.GetType()))
                    {
                        continue;//ignore the path
                    }
                }

                ISourceProxy innerProxy = this.factory.CreateProxy(source, new ObjectSourceDescription()
                {
                    Path = path
                });
                if (innerProxy != null)
                {
                    list.Add(innerProxy);
                }
            }

            try
            {
                var  del           = expression.Compile();
                Type returnType    = del.ReturnType();
                Type parameterType = del.ParameterType();
                if (parameterType != null)
                {
                    proxy = (ISourceProxy)Activator.CreateInstance(typeof(ExpressionSourceProxy <,>).MakeGenericType(parameterType, returnType), source, del, list);
                }
                else
                {
                    proxy = (ISourceProxy)Activator.CreateInstance(typeof(ExpressionSourceProxy <>).MakeGenericType(returnType), del, list);
                }
            }
            catch (Exception)
            {
                //JIT Exception
                Func <object[], object> del = expression.DynamicCompile();
                proxy = new ExpressionSourceProxy(description.IsStatic ? null : source, del, description.ReturnType, list);
            }
            if (proxy != null)
            {
                return(true);
            }

            return(false);
        }
Ejemplo n.º 2
0
        protected override bool TryCreateProxy(object source, ExpressionSourceDescription description, out ISourceProxy proxy)
        {
            proxy = null;
            var expression           = description.Expression;
            List <ISourceProxy> list = new List <ISourceProxy>();

            if (!description.IsStatic)
            {
                List <Path> paths = this.pathFinder.FindPaths(expression);
                foreach (Path path in paths)
                {
                    ISourceProxy innerProxy = this.factory.CreateProxy(source, new ObjectSourceDescription()
                    {
                        Path = path
                    });
                    if (innerProxy != null)
                    {
                        list.Add(innerProxy);
                    }
                }
            }
#if UNITY_IOS
            Func <object[], object> del = expression.DynamicCompile();
            proxy = new ExpressionSourceProxy(description.IsStatic ? null : source, del, description.ReturnType, list);
#else
            try
            {
                var  del           = expression.Compile();
                Type returnType    = del.ReturnType();
                Type parameterType = del.ParameterType();
                if (parameterType != null)
                {
                    proxy = (ISourceProxy)Activator.CreateInstance(typeof(ExpressionSourceProxy <,>).MakeGenericType(parameterType, returnType), source, del, list);
                }
                else
                {
                    proxy = (ISourceProxy)Activator.CreateInstance(typeof(ExpressionSourceProxy <>).MakeGenericType(returnType), del);
                }
            }
            catch (Exception)
            {
                //JIT Exception
                Func <object[], object> del = expression.DynamicCompile();
                proxy = new ExpressionSourceProxy(description.IsStatic ? null : source, del, description.ReturnType, list);
            }
#endif
            if (proxy != null)
            {
                return(true);
            }

            return(false);
        }