UpdateHandler.java

/*******************************************************************************
 * Copyright (c) 2011 Wind River Systems, Inc. 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:
 * Wind River Systems - initial API and implementation
 * William Chen (Wind River)- [345552] Edit the remote files with a proper editor
 *******************************************************************************/
package org.eclipse.tm.te.tcf.filesystem.internal.handlers;

import java.io.File;

import org.eclipse.compare.CompareUI;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.tm.te.tcf.filesystem.internal.compare.LocalTypedElement;
import org.eclipse.tm.te.tcf.filesystem.internal.compare.MergeEditorInput;
import org.eclipse.tm.te.tcf.filesystem.internal.compare.RemoteTypedElement;
import org.eclipse.tm.te.tcf.filesystem.internal.exceptions.TCFException;
import org.eclipse.tm.te.tcf.filesystem.internal.nls.Messages;
import org.eclipse.tm.te.tcf.filesystem.model.CacheState;
import org.eclipse.tm.te.tcf.filesystem.model.FSTreeNode;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.handlers.HandlerUtil;

/**
 * The handler to update the local file's content with the latest of its remote file.
 *
 */
public class UpdateHandler extends AbstractHandler {

	/*
	 * (non-Javadoc)
	 * @see org.eclipse.core.commands.AbstractHandler#execute(org.eclipse.core.commands.ExecutionEvent)
	 */
	@Override
	public Object execute(ExecutionEvent event) throws ExecutionException {
		IStructuredSelection selection = (IStructuredSelection) HandlerUtil.getCurrentSelectionChecked(event);
		FSTreeNode node = (FSTreeNode) selection.getFirstElement();
		try {
			StateManager.getInstance().refreshState(node);
		} catch (TCFException e) {
			Shell parent = HandlerUtil.getActiveShell(event);
			MessageDialog.openError(parent, Messages.StateManager_RefreshFailureTitle, e.getLocalizedMessage());
			return null;
		}
		Shell parent = HandlerUtil.getActiveShell(event);
		File file = CacheManager.getInstance().getCacheFile(node);
		if(file.exists()){
			CacheState state = StateManager.getInstance().getCacheState(node);
			switch (state) {
			case conflict:
				String title = Messages.UpdateHandler_StateChangedDialogTitle;
				String message = NLS.bind(Messages.UpdateHandler_StateChangedMessage, node.name);
				MessageDialog msgDialog = new MessageDialog(parent, title, null, message,
						MessageDialog.QUESTION, new String[]{Messages.UpdateHandler_Merge,
						Messages.UpdateHandler_UpdateAnyway, Messages.UpdateHandler_Cancel}, 0);
				int index = msgDialog.open();
				if (index == 0) {
					LocalTypedElement local = new LocalTypedElement(node);
					RemoteTypedElement remote = new RemoteTypedElement(node);
					IWorkbenchPage page = HandlerUtil.getActiveSite(event).getPage();
					MergeEditorInput input = new MergeEditorInput(local, remote, page);
					CompareUI.openCompareDialog(input);
				}else if(index == 1){
					CacheManager.getInstance().download(node);
				}
				break;
			case modified:
				break;
			case consistent:
				break;
			case outdated:
				CacheManager.getInstance().download(node);
				break;
			}
		}else{
			CacheManager.getInstance().download(node);
		}
		return null;
	}
}