Java tutorial
/** * This file Copyright (c) 2005-2008 Aptana, Inc. This program is * dual-licensed under both the Aptana Public License and the GNU General * Public license. You may elect to use one or the other of these licenses. * * This program is distributed in the hope that it will be useful, but * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or * NONINFRINGEMENT. Redistribution, except as permitted by whichever of * the GPL or APL you select, is prohibited. * * 1. For the GPL license (GPL), you can redistribute and/or modify this * program under the terms of the GNU General Public License, * Version 3, as published by the Free Software Foundation. You should * have received a copy of the GNU General Public License, Version 3 along * with this program; if not, write to the Free Software Foundation, Inc., 51 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Aptana provides a special exception to allow redistribution of this file * with certain other free and open source software ("FOSS") code and certain additional terms * pursuant to Section 7 of the GPL. You may view the exception and these * terms on the web at http://www.aptana.com/legal/gpl/. * * 2. For the Aptana Public License (APL), this program and the * accompanying materials are made available under the terms of the APL * v1.0 which accompanies this distribution, and is available at * http://www.aptana.com/legal/apl/. * * You may view the GPL, Aptana's exception and additional terms, and the * APL in the file titled license.html at the root of the corresponding * plugin containing this source file. * * Any modifications to this file must keep this entire header intact. */ package com.aptana.ide.editors.wizards; 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.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.ui.IEditorPart; import org.eclipse.ui.INewWizard; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPage; import org.eclipse.ui.PartInitException; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.ide.IDE; import com.aptana.ide.core.StringUtils; import com.aptana.ide.editors.unified.IUnifiedEditor; /** * Base class for creating a simple new file wizard. */ public abstract class SimpleNewFileWizard extends Wizard implements INewWizard { private SimpleNewWizardPage page; private ISelection selection; /** * Constructor for AbstractNewFileWizard. */ public SimpleNewFileWizard() { super(); setNeedsProgressMonitor(true); } /** * Adding the page to the wizard. */ public void addPages() { page = createNewFilePage(selection); addPage(page); } /** * Factory allowing subclasses to create and initialize the new file page. * @param selection * @return NewFilePage */ protected abstract SimpleNewWizardPage createNewFilePage(ISelection selection); /** * 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. * @return boolean */ public boolean performFinish() { final String 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.SimpleNewFileWizard_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 containerName, String fileName, IProgressMonitor monitor) throws CoreException { // create a sample file monitor.beginTask(Messages.SimpleNewFileWizard_Creating + fileName, 2); IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot(); IResource resource = root.findMember(new Path(containerName)); if (!resource.exists() || !(resource instanceof IContainer)) { throwCoreException( StringUtils.format(Messages.SimpleNewFileWizard_ContainerDoesNotExist, containerName)); } IContainer container = (IContainer) resource; final IFile file = container.getFile(new Path(fileName)); try { InputStream stream = openContentStream(); if (file.exists()) { throwCoreException(Messages.SimpleNewFileWizard_FileNameExists); } else { file.create(stream, true, monitor); } stream.close(); } catch (IOException e) { } monitor.worked(1); monitor.setTaskName(Messages.SimpleNewFileWizard_OpeningFileForEditing); getShell().getDisplay().asyncExec(new Runnable() { public void run() { IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage(); try { IEditorPart part = IDE.openEditor(page, file, true); if (part instanceof IUnifiedEditor) { IUnifiedEditor te = (IUnifiedEditor) part; te.getViewer().getTextWidget().setCaretOffset(getInitialCaretOffset()); //TODO: IM Fix //te.setParentDirectoryHint(FileExplorerView.lastSelected); } } catch (PartInitException e) { } } }); monitor.worked(1); } /** * getInitialCaretOffset * * @return int */ protected int getInitialCaretOffset() { return getInitialFileContents().length(); } /** * getInitialFileContents * * @return String */ protected abstract String getInitialFileContents(); /** * We will initialize file contents with a sample text. */ private InputStream openContentStream() { String contents = getInitialFileContents(); if (contents == null) { contents = StringUtils.EMPTY; } return new ByteArrayInputStream(contents.getBytes()); } private void throwCoreException(String message) throws CoreException { IStatus status = new Status(IStatus.ERROR, "com.aptana.ide.core.ui", 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. * @param workbench * @param selection * @see org.eclipse.ui.IWorkbenchWizard#init(org.eclipse.ui.IWorkbench, org.eclipse.jface.viewers.IStructuredSelection) */ public void init(IWorkbench workbench, IStructuredSelection selection) { this.selection = selection; } }