fix bug about the generateReturnAndInvocation method of the class AdaptiveClassCodeGenerator

[bootstream]

What is the purpose of the change

我发现在调用被代理的方法时，使用的参数名是该方法自身定义的旧的参数名，然而我们在生成代理类的过程中重载该方法时已经将参数名重新定义为arg为首，index为尾的参数名，例如arg0,arg1...。当使用旧的参数名调用被代理方法时，编译会出现错误，因为我们的局部变量之中已经不存在旧的参数名了，所以在调用被代理方法时应该使用新的参数名。
I found that when calling the proxy method, the parameter name used is the old parameter name defined by the method itself. However, when we overload the method in the process of generating the proxy class, we have redefined the parameter name as arg first and index tail, such as arg0, arg1.... When the proxy method is called with the old parameter name, compilation errors occur because the old parameter name does not exist in our local variables, so we should use the new parameter name when calling the proxy method.

Brief changelog

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Verifying this change

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[codecov-io]

Codecov Report

Merging #4339 into master will decrease coverage by 0.61%.
The diff coverage is 94.95%.

@@             Coverage Diff              @@
##             master    #4339      +/-   ##
============================================
- Coverage     62.88%   62.27%   -0.62%     
+ Complexity      505      504       -1     
============================================
  Files           769      790      +21     
  Lines         32995    34844    +1849     
  Branches       5215     5456     +241     
============================================
+ Hits          20748    21698     +950     
- Misses         9845    10639     +794     
- Partials       2402     2507     +105

Impacted Files	Coverage Δ	Complexity Δ
...o/common/extension/AdaptiveClassCodeGenerator.java	94.95% <94.95%> (+0.08%)	0 <0> (ø)	⬇️
...che/dubbo/remoting/transport/mina/MinaChannel.java	43.42% <0%> (-10.53%)	16% <0%> (-1%)
...e/dubbo/remoting/transport/netty/NettyChannel.java	57.64% <0%> (-4.71%)	20% <0%> (-1%)
.../apache/dubbo/remoting/transport/AbstractPeer.java	67.39% <0%> (ø)	0% <0%> (ø)	⬇️
...a/org/apache/dubbo/common/json/ParseException.java	0% <0%> (ø)	0% <0%> (?)
...o/rpc/protocol/thrift/DubboClassNameGenerator.java	100% <0%> (ø)	0% <0%> (?)
.../java/org/apache/dubbo/common/json/JSONObject.java	17.07% <0%> (ø)	0% <0%> (?)
.../java/org/apache/dubbo/common/json/JSONWriter.java	58.94% <0%> (ø)	0% <0%> (?)
.../apache/dubbo/rpc/protocol/thrift/ThriftUtils.java	91.8% <0%> (ø)	0% <0%> (?)
.../java/org/apache/dubbo/common/json/JSONReader.java	68.42% <0%> (ø)	0% <0%> (?)
... and 19 more

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[bootstream]

jdk version: 1.8.0_172 , compilation options : -parameters

[beiwei30]

I am not convinced.

Would you mind to provide a sample code to help me to understand the scenario?

[beiwei30]

I think I understand what happens, you use 'javac -parameters' to compile. In this case, we should consider to enhance method signature generation instead, in my opinion.

[beiwei30]

second thought, I went through the code again, there are lots of code based on 'arg%d' format. I agree your change is minimal. I will consider to merge.

[tswstarplanet]

Sorry, I think the file committed is a little confused because it delete a file and add an almost same file. It' s difficult to identify the diff