Java tutorial
/* * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). * All rights reserved. * This component and the accompanying materials are made available * under the terms of the License "Eclipse Public License v1.0" * which accompanies this distribution, and is available * at the URL "http://www.eclipse.org/legal/epl-v10.html". * * Initial Contributors: * Nokia Corporation - initial contribution. * * Contributors: * * Description: * */ package com.nokia.carbide.cpp.internal.pi.save; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.lang.reflect.InvocationTargetException; import org.eclipse.core.resources.IContainer; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IResource; import org.eclipse.core.resources.IWorkspaceRoot; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IPath; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Path; import org.eclipse.core.runtime.Status; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.operation.IRunnableWithProgress; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.wizard.Wizard; import org.eclipse.swt.widgets.Display; import org.eclipse.ui.INewWizard; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPage; import org.eclipse.ui.IWorkbenchWizard; import org.eclipse.ui.PartInitException; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.ide.IDE; import com.nokia.carbide.cpp.internal.pi.interfaces.ISaveTable; public class SaveTableWizard extends Wizard implements INewWizard { /** * This is a sample new wizard. Its role is to create a new file * resource in the provided container. If the container resource * (a folder or a project) is selected in the workspace * when the wizard is opened, it will accept it as the target * container. The wizard creates one file with the extension * "mpe". If a sample multi-page editor (also available * as a template) is registered for the same extension, it will * be able to open it. */ private SaveTableWizardPage page; private ISelection selection; private ISaveTable saveTable; private String saveTableFileContents; /** * Constructor for SampleNewWizard. */ public SaveTableWizard(ISaveTable saveTable) { super(); this.saveTable = saveTable; this.setWindowTitle(Messages.getString("SaveTableWizard.SavingTableData")); //$NON-NLS-1$ setNeedsProgressMonitor(true); } /** * Adding the page to the wizard. */ public void addPages() { page = new SaveTableWizardPage(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 IPath containerName = page.getContainerName(); final String fileName = page.getFileName(); IRunnableWithProgress op = new IRunnableWithProgress() { public void run(IProgressMonitor monitor) throws InvocationTargetException { try { doFinish(containerName, fileName, 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(), Messages.getString("SaveTableWizard.Error"), //$NON-NLS-1$ 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(IPath containerName, String fileName, IProgressMonitor monitor) throws CoreException { // create a sample file monitor.beginTask(Messages.getString("SaveTableWizard.Creating") + fileName, 3); //$NON-NLS-1$ IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot(); IResource resource = root.findMember(containerName); if (!resource.exists() || !(resource instanceof IContainer)) { throwCoreException(Messages.getString("SaveTableWizard.ProjectFolder") + containerName //$NON-NLS-1$ + Messages.getString("SaveTableWizard.doesNotExist")); //$NON-NLS-1$ } monitor.worked(1); monitor.setTaskName(Messages.getString("SaveTableWizard.WritingTableData")); //$NON-NLS-1$ IContainer container = (IContainer) resource; final IFile file = container.getFile(new Path(fileName)); try { InputStream stream = openContentStream(); 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(Messages.getString("SaveTableWizard.OpeningFileForEditing")); //$NON-NLS-1$ 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); } /** * We will initialize file contents with a sample text. */ private InputStream openContentStream() { Display.getDefault().syncExec(new Runnable() { public void run() { saveTableFileContents = saveTable.getData(); ; } }); return new ByteArrayInputStream(saveTableFileContents.getBytes()); } private void throwCoreException(String message) throws CoreException { IStatus status = new Status(IStatus.ERROR, "junk", IStatus.OK, message, null); //$NON-NLS-1$ 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; } }