使用 eclipse AST 检查 Java 代码片段

发布于 2024-11-03 15:34:54 字数 1078 浏览 4 评论 0原文

我正在尝试使用 eclipse 抽象语法树检查一些 Java 代码片段的语法和逻辑正确性。

我对如何做到这一点做了一些研究，我阅读了文档，但我还没有找到明确的例子。

所以，我想检查一组陈述的正确性，例如：

System.out.println("I'm doing something");
callAMethod(7);
 System.out.println("I'm done");**sdsds**

类似的东西。你明白了。此处，sdsds 应被标记为错误。

我的问题是如何检测 Java 文本在语法或词汇上是否不正确？我怎样才能得到描述错误的消息？

我的代码是：

ASTParser parser = ASTParser.newParser(AST.JLS3);
parser.setKind(ASTParser.K_STATEMENTS);
parser.setSource(textToParse.toCharArray());
parser.setResolveBindings(false); 
ASTNode node = (ASTNode) parser.createAST(null); 
 // If MALFORMED bit is 1, then we have an error. The position of MALFORMED 
 being 1, then this should detect the error. **But it doesn't. What's the problem?**
    if (node.getFlags() % 2 == 1) { 
    // error detected
}

if (node instanceof CompilationUnit) {
    // there are severe parsing errors (unrecognized characters for example)
    if (((CompilationUnit) node).getProblems().length != 0) {
        // error detected
    }
}

希望有人能帮助我。多谢！

原文

I'm trying to check for syntactical and logical correctness some Java code fragments using the eclipse abstract syntax tree.

I did some research on how this could be done, I read the documentation, but I haven't found a clear example.

So, I want to check for correctness a set of statements, something like:

System.out.println("I'm doing something");
callAMethod(7);
 System.out.println("I'm done");**sdsds**

Something like that. You got the point. Here, sdsds should be signaled as erroneous.

My question is how can I detect if the Java text is incorrect syntactically or lexically? And how can I get the messages describing the errors?

My code for that is:

ASTParser parser = ASTParser.newParser(AST.JLS3);
parser.setKind(ASTParser.K_STATEMENTS);
parser.setSource(textToParse.toCharArray());
parser.setResolveBindings(false); 
ASTNode node = (ASTNode) parser.createAST(null); 
 // If MALFORMED bit is 1, then we have an error. The position of MALFORMED 
 being 1, then this should detect the error. **But it doesn't. What's the problem?**
    if (node.getFlags() % 2 == 1) { 
    // error detected
}

if (node instanceof CompilationUnit) {
    // there are severe parsing errors (unrecognized characters for example)
    if (((CompilationUnit) node).getProblems().length != 0) {
        // error detected
    }
}

Hope somebody can help me. Thanks a lot!

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残花月 2024-11-10 15:34:54

如果将解析器类型更改为 K_COMPILATION_UNIT 并调用解析器，则可以向返回的编译单元询问问题。

    parser.setKind(ASTParser.K_COMPILATION_UNIT);
    final CompilationUnit cu = (CompilationUnit) parser.createAST(null);
    IProblem[] problems = cu.getProblems();
    for(IProblem problem : problems) {
        System.out.println("problem: " + problem.getMessage() + problem.getSourceStart());
    }

If you change the parser kind to K_COMPILATION_UNIT and invoke the parser then you can ask the returned compilation unit for problems.

    parser.setKind(ASTParser.K_COMPILATION_UNIT);
    final CompilationUnit cu = (CompilationUnit) parser.createAST(null);
    IProblem[] problems = cu.getProblems();
    for(IProblem problem : problems) {
        System.out.println("problem: " + problem.getMessage() + problem.getSourceStart());
    }

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