我怎样才能创建注释处理器，处理一个局部变量？ [英] How can I create an annotation processor that processes a Local Variable?

问题描述

我试图创造一个局部变量的注释。我知道我不能保留在生成的字节code中的注释，但我应该可以做这样的事情有机会获得在编译时的信息：

I'm trying to create an annotation for a local variable. I know that I can't retain the annotation in the generated bytecode, but I should be able to have access to the information at compile time by doing something like this:

@Target({ElementType.LOCAL_VARIABLE})
@Retention(RetentionPolicy.SOURCE)
public @interface Junk {
  String value();
}

只是，这并不能得到由易处理，或者javac的时候我指定它支持在以下类型有垃圾一ProcessorFactory：

only, this doesn't get processed by apt, or javac when I specify a ProcessorFactory that has "Junk" in it's supported types in the following:

class JunkTester {
    public static void main(String[] args) {
        @Junk String tmp = "Hello World";
        System.out.println(tmp);
    }
}

在我之前移动@Junk标注，它还是会正常工作公共静态

It will however work when I move the @Junk annotation before public static

思想或解决方法？

推荐答案

做了一些快速测试，并搜查了一点，它看起来像挂接到 LOCAL_VARIABLE 是不是真的支持...但：

Did some quick tests and searched a little, and it's looking like hooking into LOCAL_VARIABLE isn't really supported...yet:

<一个href=\"http://forums.sun.com/thread.jspa?threadID=775449\">http://forums.sun.com/thread.jspa?threadID=775449

<一href=\"http://www.cs.rice.edu/~mgricken/research/laptjavac/\">http://www.cs.rice.edu/~mgricken/research/laptjavac/

http://types.cs.washington.edu/jsr308/

可能是完全错误的，但这是它是如何寻找...

Could be totally wrong, but that's how it's looking...

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