package com.baselet.plugin.builder;
import java.util.Iterator;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectDescription;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.handlers.HandlerUtil;
/**
* Adds or removes the {@link UmletNature}
*/
public class AddRemoveUmletNatureHandler extends AbstractHandler {
@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
ISelection selection = HandlerUtil.getCurrentSelection(event);
//
if (selection instanceof IStructuredSelection) {
for (Iterator<?> it = ((IStructuredSelection) selection).iterator(); it
.hasNext();) {
Object element = it.next();
IProject project = null;
if (element instanceof IProject) {
project = (IProject) element;
}
else if (element instanceof IAdaptable) {
project = ((IAdaptable) element)
.getAdapter(IProject.class);
}
if (project != null) {
try {
toggleNature(project);
} catch (CoreException e) {
throw new ExecutionException("Failed to toggle nature",
e);
}
}
}
}
return null;
}
/**
* Toggles sample nature on a project
*
* @param project
* to have sample nature added or removed
*/
private void toggleNature(IProject project) throws CoreException {
if (project.hasNature(UmletNature.NATURE_ID)) {
removeUmletNature(project);
}
else {
addUmletNature(project);
}
}
public static void addUmletNature(IProject project) throws CoreException {
IProjectDescription description = project.getDescription();
String[] natures = description.getNatureIds();
// Add the nature
String[] newNatures = new String[natures.length + 1];
System.arraycopy(natures, 0, newNatures, 0, natures.length);
newNatures[natures.length] = UmletNature.NATURE_ID;
description.setNatureIds(newNatures);
project.setDescription(description, null);
}
public static boolean removeUmletNature(IProject project) throws CoreException {
IProjectDescription description = project.getDescription();
String[] natures = description.getNatureIds();
for (int i = 0; i < natures.length; ++i) {
if (UmletNature.NATURE_ID.equals(natures[i])) {
// Remove the nature
String[] newNatures = new String[natures.length - 1];
System.arraycopy(natures, 0, newNatures, 0, i);
System.arraycopy(natures, i + 1, newNatures, i, natures.length - i - 1);
description.setNatureIds(newNatures);
project.setDescription(description, null);
return true;
}
}
return false;
}
}