How to programmatically find a .java file in an Eclipse plugin from full classname?

Question

Inside an Eclipse plugin, I'd like to open a file in editor.

I know the full package and class name

How can I determine the path of the .java file from this?

Answer 1

Take a look at IJavaProject.findType( name ) method. Once you have an IType, you can use getPath or getResource methods to locate the file. This method searches across a project and everything visible from that project.

To search the whole workspace, iterate through all the Java projects in the workspace, calling the findType method on each in turn.

Answer 2

You also need to know the source folder.

IProject prj = ResourcePlugin.getWorkspace().getRoot().getProject("project-name");
IFile theFile = prj.getFile(sourceFolder + packageName.replace('.','/') + className + ".java");

Generally you specify the file for an editor with an IFile. You can also ask an IFile for variants of the file's path.