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    <p>Using the search engine is overkill. The search engine is meant for cross file searching. And, without the workbench started (ie- without an Eclipse instance in the background) you cannot use the search engine.</p> <p>It looks like you only want to find references to variables in the same file. Your best bet here is to create a visitor that will visit the entire file and look for references to the variable. Since these are variables and their scope doesn't escape the method they are declared in, you only need to visit that method.</p> <p>Something like this:</p> <pre><code>class MyVariableVisitory extends ASTVisitor { public boolean visit(SimpleName node) { if (node.getIdentifier().equals(variableToLookFor)) { acceptMatch(node); } return true; } } </code></pre> <p>Since you are only looking for references to variables, you only need to look at <code>Name</code> ast nodes.</p>
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    1. POCan I use JDT search engine while parsing a source from JDT AST
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    1. USAndrew Eisenberg
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    1. COThanks for your answer.Even though in this case it is limited to method scope,in some other cases it might required to search in class/package/project scope. Sorry I'm bit confused on your suggestion. Assume the same code I've given: In the existing visitor I'm using,the visit method of "VariableDeclarationFragment" type gets called when the parser comes to the line where "s" is declared.And I want to find out the references of "s" at that point it self before the existing parser moves forward from the current line.So what you suggest is to use another AST parser at that point? Please explain.
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      1. USBhanuka Withana
    2. COI had originally made the assumption that you knew which variable/field you were looking for. But, if you don't know it yet, then you will need to do two passes over the AST. The first to find the node you are interested in and the second to find references. You will need to also parse and visit all other relevant files in the project, depending on the scope of the variable.
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      1. USAndrew Eisenberg
    3. COThanks a lot for your explanation. Initially, I also felt that I might have to go for such an approach. But then only I tried things like using the SearchEngine and was looking into the possibilities of using AST it self... etc. since having two AST parsing won't be a better approach in performance aspect. But seems to be that is the only option. May be I should check whether there are any other libraries available to get it done before get into the approach of using two ASTs.
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