org.fosstrak.llrp.commander.wizards.NewLLRPMessageWizard Maven / Gradle / Ivy

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/*
 *  
 *  Fosstrak LLRP Commander (www.fosstrak.org)
 * 
 *  Copyright (C) 2008 ETH Zurich
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see  
 *
 */

package org.fosstrak.llrp.commander.wizards;

import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.wizard.Wizard;
import org.eclipse.ui.INewWizard;
import org.eclipse.ui.IWorkbench;
import org.eclipse.core.runtime.*;
import org.eclipse.jface.operation.*;
import java.lang.reflect.InvocationTargetException;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.core.resources.*;
import org.eclipse.core.runtime.CoreException;
import java.io.*;
import org.eclipse.ui.*;
import org.eclipse.ui.ide.IDE;
import org.fosstrak.llrp.commander.util.LLRPFactory;
import org.llrp.ltk.types.LLRPMessage;

/**
 * This wizard lets the user create a new LLRP message with all mandatory parameters set.
 * 
 * The implementation is based on Eclipse's "New File Wizard" template (see plug-in development environment).
 *
 * @author Ulrich Etter, ETHZ
 *
 */
public class NewLLRPMessageWizard extends Wizard implements INewWizard {
	
	private final String PLUGIN_ID = "llrp";
	
	private NewLLRPMessageWizardPage page;
	private ISelection selection;

	/**
	 * Constructor for NewLLRPMessageWizard.
	 */
	public NewLLRPMessageWizard() {
		super();
		setNeedsProgressMonitor(true);
	}
	
	/**
	 * Adding the page to the wizard.
	 */
	public void addPages() {
		page = new NewLLRPMessageWizardPage(selection);
		addPage(page);
	}

	/**
	 * This method is called when 'Finish' button is pressed in
	 * the wizard. We will create an operation and run it
	 * using wizard as execution context.
	 */
	public boolean performFinish() {
		final String folderName = page.getFolderName();
		final String fileName = page.getFileName();
		final String messageType = page.getLLRPMessageType();
		IRunnableWithProgress op = new IRunnableWithProgress() {
			public void run(IProgressMonitor monitor) throws InvocationTargetException {
				try {
					doFinish(folderName, fileName, messageType, monitor);
				} catch (CoreException e) {
					throw new InvocationTargetException(e);
				} finally {
					monitor.done();
				}
			}
		};
		try {
			getContainer().run(true, false, op);
		} catch (InterruptedException e) {
			return false;
		} catch (InvocationTargetException e) {
			Throwable realException = e.getTargetException();
			MessageDialog.openError(getShell(), "Error", realException.getMessage());
			return false;
		}
		return true;
	}
	
	/**
	 * The worker method. It will find the container, create the
	 * file if missing or just replace its contents, and open
	 * the editor on the newly created file.
	 */
	private void doFinish(
		String folderName,
		String fileName,
		String messageType, 
		IProgressMonitor monitor)
		throws CoreException {
		monitor.beginTask("Creating " + fileName, 2);
		IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
		IResource resource = root.findMember(new Path(folderName));
		if (!resource.exists() || !(resource instanceof IContainer)) {
			throwCoreException("Container \"" + folderName + "\" does not exist.");
		}
		IContainer container = (IContainer) resource;
		final IFile file = container.getFile(new Path(fileName));
		try {
			InputStream stream = openContentStream(messageType);
			if (file.exists()) {
				file.setContents(stream, true, true, monitor);
			} else {
				file.create(stream, true, monitor);
			}
			stream.close();
		} catch (IOException e) {
		}
		monitor.worked(1);
		monitor.setTaskName("Opening file for editing...");
		getShell().getDisplay().asyncExec(new Runnable() {
			public void run() {
				IWorkbenchPage page =
					PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
				try {
					IDE.openEditor(page, file, true);
				} catch (PartInitException e) {
				}
			}
		});
		monitor.worked(1);
	}
	
	/**
	 * Initializes file contents with a default LLRP message.
	 */
	private InputStream openContentStream(String messageType) {
		String contents = "";
		try {
			LLRPMessage message = LLRPFactory.createLLRPMessage(messageType);
			contents = message.toXMLString();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return new ByteArrayInputStream(contents.getBytes());
	}

	private void throwCoreException(String message) throws CoreException {
		IStatus status =
			new Status(IStatus.ERROR, PLUGIN_ID, IStatus.OK, message, null);
		throw new CoreException(status);
	}

	/**
	 * We will accept the selection in the workbench to see if
	 * we can initialize from it.
	 * @see IWorkbenchWizard#init(IWorkbench, IStructuredSelection)
	 */
	public void init(IWorkbench workbench, IStructuredSelection selection) {
		this.selection = selection;
	}
}