Obtain Inspection output for a given file Follow

Hello everyone,

For the past few days I have been browsing and prototyping with the Inspection API, but to no avail. I am looking for an API to, given a file, obtain all Inspections that IntelliJ shows. In other words, unused imports, unused variables, etc...

I have tried several things thus far, with mixed results:

The following initialization code is available:

final InspectionManagerEx instance = (InspectionManagerEx) InspectionManager.getInstance(project);
GlobalInspectionContextImpl context = (GlobalInspectionContextImpl) instance.createNewGlobalContext(true);
final List<InspectionToolWrapper> inspectionToolWrappers = InspectionToolRegistrar.getInstance().get();
PsiFile file = PsiDocumentManager.getInstance(project).getPsiFile(editor.getDocument()).getOriginalFile();

I run all code snippets below in a block of the following:

ProgressManager.getInstance().runProcess(() -> {
    DumbServiceImpl.getInstance(project).runReadActionInSmartMode(() -> {
       <snippets here>
    });
}, new EmptyProgressIndicator());

My first attempt was to retrieve the Inspections presentations from the context, however this always returns an empty list.

final List<CommonProblemDescriptor> problems = inspectionToolWrappers.stream()
        .flatMap(wrapper -> {
            final InspectionToolPresentation presentationOrNull = context.getPresentationOrNull(wrapper);
            if (presentationOrNull == null) {
                return Stream.empty();
            }
            return presentationOrNull.getProblemDescriptors().stream();
        })
        .collect(Collectors.toList());
System.out.println(problems.toString());

Then I tried to the code analyzer on the file, but again an empty list:

final DaemonCodeAnalyzerImpl codeAnalyzer = (DaemonCodeAnalyzerImpl) DaemonCodeAnalyzerImpl.getInstance(project);
final List<HighlightInfo> highlightInfos = codeAnalyzer.runMainPasses(file, editor.getDocument(), progressIndicator);
System.out.println(highlightInfos);

Then I invoked the LocalInspectionsPass directly, again an empty list:

final LocalInspectionsPass localInspectionsPass = new LocalInspectionsPass(file, editor.getDocument(), 0, editor.getDocument().getTextLength(), file.getTextRange(), true, HighlightInfoProcessor.getEmpty());
System.out.println(localInspectionsPass.getInfos());

My last attempt does return a list, but there are two issues: 1. It is extremely slow and locks up the UI Thread. Putting the logic in a separate Thread throws error of invalid access. 2. It does not seem to return information about the unused import and I do not understand how it maps to the yellow highlighting my editor actually shows. (In the file I tests, I have 2 yellow highlighted errors and 1 unused import, but my list returns like 10 issues)

final List<ProblemDescriptor> problems = inspectionToolWrappers.stream()
        .flatMap(wrapper -> InspectionEngine.runInspectionOnFile(file, wrapper, context).stream())
        .collect(Collectors.toList());
System.out.println(problems.toString());

The file I am testing the plugin on. Expected highlighted parts are the `if` and the `!!false` and the `import java.util.List` is grayed out.

import java.util.List;

public class Foo {

    public static void main(String[] args) {
        if (!!false) {

        }
    }
}

All in all, my issue seems rather trivial. After indexing and calculation of Inspections (at the moment they are shown in the UI), I would like to obtain these Inspections and the corresponding information.

Could someone help me out pointing to the correct API endpoint to obtain this information?