如何在eclipse中的AST或CompilationUnit的字段上搜索引用？ [英] How could I search references to a field on a AST or a CompilationUnit in eclipse?

问题描述

您好，

Hi,

我正在开发一个Eclipse插件。 I
需要使用AST或$ code> jdt.core.dom
来查找
源中的所有引用。我需要这个
引用，如 ASTNodes ，以便
获取父节点，并在表达式中检查几个
项，其中
涉及参考。
事先感谢。

I'm developing an Eclipse plugin. I need to find all the references in the source using AST's or jdt.core.dom or something like that. I need this references like ASTNodes in order to get the parent node and check several things in the expression where references are involved. Thanks beforehand.

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已编辑：

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Edited:

我想要更具体一些，我的问题是我尝试捕获一些常量的引用，但是...我不知道如何能够在匹配中捕获这个引用。我需要检查涉及确定常数的引用的表达式。我只得到使用它们的方法的来源。

I want to concrete a little more, My problem is that I try to catch some references to a constant but... I have not idea how I can do to catch in the matches this references. I need check the expressions which the references to a determined constant are involved. I only get the source of the method where they are used.

我认为问题是范围或模式：

I think the problem is the scope or the pattern:

pattern = SearchPattern.createPattern(field, IJavaSearchConstants.REFERENCES);


scope = SearchEngine.createJavaSearchScope(declaringType.getMethods());

提前感谢

推荐答案

我使用的东西如下：

1. 搜索
   方法的声明，返回一个IMethod


2. 搜索对
   的引用IMethod，记录这些IMethods


3. 对于返回的每个IMethod，从其编译创建一个
   AST单位

搜索声明或引用如下所示：

Searching for declarations or references looks like the following code.

SearchRequestor findMethod = ...; // do something with the search results
SearchEngine engine = new SearchEngine();
IJavaSearchScope workspaceScope = SearchEngine.createWorkspaceScope();
SearchPattern pattern = SearchPattern.createPattern(searchString,
            IJavaSearchConstants.METHOD, IJavaSearchConstants.DECLARATIONS,
            SearchPattern.R_EXACT_MATCH);
SearchParticipant[] participant = new SearchParticipant[] { SearchEngine
            .getDefaultSearchParticipant() };
engine.search(pattern, participant, workspaceScope, findMethod,
                monitor);

一旦你有你的IMethod参考，你可以使用：

Once you have your IMethod references, you can get to the AST using:

ASTParser parser = ASTParser.newParser(AST.JLS3);
parser.setResolveBindings(true);
if (methodToSearch.isBinary()) {
    parser.setSource(methodToSearch.getClassFile());
} else {
    parser.setSource(methodToSearch.getCompilationUnit());
}
CompilationUnit cu = (CompilationUnit) parser.createAST(null);

请参阅 http://help.eclipse.org/helios/index.jsp?topic=/org.eclipse.jdt .doc.isv / guide / jdt_int_core.htm 有关java搜索，java模型和AST的更多详细信息。

See http://help.eclipse.org/helios/index.jsp?topic=/org.eclipse.jdt.doc.isv/guide/jdt_int_core.htm for more details on java search, the java model, and the AST.

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