快速可靠的方法来查找源代码文件是否实现了接口 [英] Fast and reliable way to find out if a source code file implements an interface

问题描述

给定一个Java源代码文件，找出它是否实现了给定接口的快速可靠方法是什么?

Given a java source code file, what is a fast and reliable way to find out if it implements a given interface?

一种可靠的方法是将文件解析为语法树(例如使用Eclipse的ASTNode类)并寻找合适的节点.

A reliable way would be to parse the file into a syntax tree (using e.g. the ASTNode class of eclipse) and look for the right nodes.

一种快速的方法是查找带有实现"的行，将那些在注释中的行踢掉，然后将接口与适当的import语句相关联.我可能在这里错过了一些奇怪的其他情况.

A fast way would be to look for lines with "implements", kick out those that are in comments, and relate the interface to an appropriate import statement. I am probably missing some strange other cases here.

你会怎么做?

推荐答案

我会说，解析源代码文件既快速又可靠.但是，我想，快速"是一个模糊的概念，它的确取决于实际情况.不过，与扫描源文件中是否出现实现"一词相比，我不希望有太多开销—因此，如果后者对您来说很好，我认为前者也应该可以接受吗?

I would say that parsing a source code file is both, fast and reliable. But "fast" is such a vague notion that it really depends, I guess. I wouldn't expect too much overhead when compared to scanning the source file for occurrences of the words "implements", though -- thus if the latter is fine for you, I'd assume the former should be acceptable too?

javax.tools.* API是入门的好入口；但是，那里也有许多用于Java的(开源)源代码解析器.

The javax.tools.* API would be a good entrance point to get started; however, there are also a number of (open source) source code parsers for Java out there.

此外，此处是Oracle网站上的介绍性博客文章.

Also, here is an introductory blog post on Oracle's websites.

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