eclipse plugin how to open file in IDE by code

Question

I am working on eclipse plugin in which i have to open a file from project explorer. Suppose i have a project ABC in project explorer. after right click on project i got a option to run my plugin tool. after processing i got some result like Check file xyz.java.

Now i want to open this file in IDE by code

i am using this

File absolute = new File("/Decider.java");  
File file = new File("/Decider.java");
IFileStore fileOnLocalDisk = EFS.getLocalFileSystem().getStore(absolute.toURI() );

FileStoreEditorInput editorInput = new FileStoreEditorInput(fileOnLocalDisk);

IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
IWorkbenchPage page = window.getActivePage();

 try {  
    page.openEditor(editorInput, "org.eclipse.ui.DefaultTextEditor");         

    page.openEditor(editorInput, "MyEditor.editor");          

        IFileStore fileStore = EFS.getLocalFileSystem().getStore(absolute.toURI() );
        IDE.openEditorOnFileStore( page, fileStore );

      } catch (PartInitException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


    try {
        System.out.println(file.getCanonicalPath());
    } catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }


    IPath path = new Path(" /DirectoryReader.java");
    IFile sampleFile =  ResourcesPlugin.getWorkspace().getRoot().getFile(path);

    IEditorInput editorInput1 = new FileEditorInput(sampleFile);
    IWorkbenchWindow window1=PlatformUI.getWorkbench().getActiveWorkbenchWindow();
    IWorkbenchPage page1 = window1.getActivePage();
    try {
        page1.openEditor(editorInput1, "org.eclipse.ui.DefaultTextEdtior");
    } catch (PartInitException e1) {

        e1.printStackTrace();
    } 

here it's create a new file named decider in c drive which means it's getting a wrong path.

but when i use path code in some independent java file as a normal JAVA project it's getting the correct path.

Answer 1

For a file in the workspace you should use IFile. If you have a selection from Project Explorer or another view that should already be an IFile or can be adapted to an IFile.

If you just have a workspace relative path use ResourcesPlugin.getWorkspace().getRoot().getFile(path) (path would include a project).

To open the default editor for the file contents use

IDE.openEditor(page, file, true);

to open a specific editor use

IDE.openEditor(page, file, "editor id");

IDE is org.eclipse.ui.ide.IDE.