ProjectUtils.java

package com.github.jarlakxen.scala.sbt.util;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceRuleFactory;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.jobs.ISchedulingRule;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.internal.core.PackageFragmentRoot;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.ISelectionService;
import org.eclipse.ui.PlatformUI;

public class ProjectUtils {
	
    public static final IResourceRuleFactory RULE_FACTORY = ResourcesPlugin.getWorkspace().getRuleFactory();
    
    public static ISchedulingRule mutexRuleFor(IProject project) {
    	return RULE_FACTORY.createRule(project);
    }
    
	public static IProject getCurrentSelectedProject() {
		IProject project = null;
		ISelectionService selectionService = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getSelectionService();

		ISelection selection = selectionService.getSelection();

		if (selection instanceof IStructuredSelection) {
			Object element = ((IStructuredSelection) selection).getFirstElement();

			if (element instanceof IResource) {
				project = ((IResource) element).getProject();
			} else if (element instanceof PackageFragmentRoot) {
				IJavaProject jProject = ((PackageFragmentRoot) element).getJavaProject();
				project = jProject.getProject();
			} else if (element instanceof IJavaElement) {
				IJavaProject jProject = ((IJavaElement) element).getJavaProject();
				project = jProject.getProject();
			}
		}
		return project;
	}

}