Why my Symbol reference is unidirectional (no usages)?

IntelliJ Platform
1

I’ve created TypeScript to Java Symbol reference which matches service calls by class and method names. It works perfectly TS → Java way, but then in Java file I see “No usages”

I’ve implemented:
NavigatableSymbol, PsiSymbolReference and PsiSymbolReferenceProvider

Our symbols implementation might be found here:

What should I do more to see usages of Java class methods?

3

Hey Marcin,

Find usage machinery checks only those references that are provided by implementations of so-called reference searchers.
The idea is that if you are looking for references of a class Foo, you basically need to search for all text occurrences of Foo in all source files and check if each occurrence has a reference to Foo class. But Java reference searchers do not look into non-Java files, and it’s the responsibility of the plugin to provide a searcher that consumes all potential occurrences in other languages.
See com.intellij.psi.impl.search.JavaRecordComponentSearcher as an example.

4

Thank you for reply, first issue encountered: why it does not list methods?

image
image2270×1106 472 KB

After clicking around I got only what’s on screenshot. Selecting method results in PsiParameter being found only, and only if method has any parameters. Selecting non params method does nothing…

5

Using methodReferencesSearch instead worked.

6

Managed to make it work, if someone is looking for Java → TypeScript (TSX) reference searcher:

class HillaReferenceSearcher : QueryExecutorBase<PsiReference, MethodReferencesSearch.SearchParameters>() {

    override fun processQuery(queryParameters: MethodReferencesSearch.SearchParameters, consumer: Processor<in PsiReference>) {
        val element = queryParameters.method

        val searchHelper = PsiSearchHelper.getInstance(queryParameters.project)
        val scope = GlobalSearchScope.projectScope(queryParameters.project)
        val typeScriptFileType = TypeScriptJSXFileType.INSTANCE

        val filteredScope = GlobalSearchScope.getScopeRestrictedByFileTypes(scope, typeScriptFileType)
        searchHelper.processElementsWithWord(
            { psiElement, offset ->
                if (psiElement.elementType == JSElementTypes.REFERENCE_EXPRESSION) {
                    val range = TextRange(offset, offset + element.name.length)
                    val reference = object : PsiReferenceBase<PsiElement>(psiElement, range) {
                        override fun resolve(): PsiElement = psiElement
                    }
                    consumer.process(reference)
                }
                true // return false to stop the search early
            },
            filteredScope,
            element.name,
            UsageSearchContext.IN_CODE,
            true
        )

    }

}

If you spot any errors in above please add comment.

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