bundles/org.eclipse.wst.xml.ui/src/org/eclipse/wst/xml/ui/internal/actions/NodeAction.java

/*******************************************************************************
 * Copyright (c) 2001, 2009 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Jens Lukowski/Innoopract - initial renaming/restructuring
 *     
 *******************************************************************************/


package org.eclipse.wst.xml.ui.internal.actions;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.Path;
import org.eclipse.jface.action.Action;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel;

public abstract class NodeAction extends Action {

	public String getSortKey() {
		return null;
	}

	/**
	 * Checks that the resource backing the model is writeable utilizing <code>validateEdit</code>                             
	 * on a given <tt>IWorkspace</tt>.                                                                                         
	 *                                                                                                                         
	 * @param model the model to be checked                                                                                    
	 * @param context the shell context for which <code>validateEdit</code> will be run                                        
	 * @return boolean result of checking <code>validateEdit</code>. If the resource is unwriteable, <code>status.isOK()</code>
	 * will return true; otherwise, false.                                                                                     
	 */                                                                                                                        
	protected final boolean validateEdit(IStructuredModel model, Shell context) {                                              
		if (model != null && model.getBaseLocation() != null) {                                                                
			IFile file = ResourcesPlugin.getWorkspace().getRoot().getFile(new Path(model.getBaseLocation()));
			if (!file.isAccessible())
				return true;
			return ResourcesPlugin.getWorkspace().validateEdit(new IFile[] {file}, context).isOK();                            
		}                                                                                                                      
		return false; //$NON-NLS-1$                                                                                            
	}

	public abstract String getUndoDescription();
}