I'm looking for a java library that allows me to parse a java source file and that gives me an AST representation of the code.
Actually I'm only interested in the class and method definitions with their annotations. I don't need the AST of the method code.
I'm using this information for code generation. This is why I can't compile the source file first to get the information from the resulting class file. The code wouldn't compile without errors until I generate some additional classes.
Java 6 supports this as a native part of the compiler and has standard APIs for it ( javax.lang.model
). You can read up on it here . It is designed specifically for your use-case (ie code generation from annotations and source).
ANTLR ( http://www.antlr.org/ ) has a parser for the Java language and it also suports ASTs.
try
options {
output=AST;
}
in the *.g file (I haven't tried it personally);
我认为NetBeans Javaparser可能是你会感兴趣的东西。
You can try JavaCC with a grammar file for java language.
我找到了项目javaparser ,它解析单个java文件并返回一个格式良好的AST。
@tangens wrote about JavaParser but referenced a now outdated project.
There has been a fork in 2011 that is still actively maintained and now also parses Java 1.7 and 1.8.
You can find it there: https://github.com/javaparser/javaparser
Disclaimer: I am a contributor to that project.
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