Merge pull request #293 from pantianying/develop_generic_code_fix

Develop generic code fix

filter/impl/generic_filter.go

@@ -47,14 +47,12 @@ type GenericFilter struct{}
 func (ef *GenericFilter) Invoke(invoker protocol.Invoker, invocation protocol.Invocation) protocol.Result {
 	if invocation.MethodName() == constant.GENERIC && len(invocation.Arguments()) == 3 {
 		oldArguments := invocation.Arguments()
-		var newParams []hessian.Object
+
 		if oldParams, ok := oldArguments[2].([]interface{}); ok {
+			newParams := make([]hessian.Object, 0, len(oldParams))
 			for i := range oldParams {
 				newParams = append(newParams, hessian.Object(struct2MapAll(oldParams[i])))
 			}
-		} else {
-			return invoker.Invoke(invocation)
-		}
 			newArguments := []interface{}{
 				oldArguments[0],
 				oldArguments[1],
@@ -64,6 +62,7 @@ func (ef *GenericFilter) Invoke(invoker protocol.Invoker, invocation protocol.In
 			newInvocation.SetReply(invocation.Reply())
 			return invoker.Invoke(newInvocation)
 		}
+	}
 	return invoker.Invoke(invocation)
 }