CreateHandler.java

package com.anjlab.eclipse.tapestry5.handlers;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.handlers.HandlerUtil;

import com.anjlab.eclipse.tapestry5.actions.CreateActionViewDelegate;

public class CreateHandler extends AbstractHandler
{

    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException
    {
        CreateActionViewDelegate delegate = new CreateActionViewDelegate();

        IWorkbenchWindow window = HandlerUtil.getActiveWorkbenchWindowChecked(event);

        IWorkbenchPart part = HandlerUtil.getActivePart(event);

        if (part instanceof IViewPart)
        {
            delegate.init((IViewPart) part);
        }
        else
        {
            delegate.init(window);
        }

        delegate.run(null);

        return null;
    }

}