Java tutorial
/******************************************************************************* * Copyright (c) 2012 M. Cenkar, P. Nurkowski, A. Pawelec, M. Piatek * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. ******************************************************************************/ package pl.wroc.pwr.jbehaveplugin.storytemplate; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.lang.reflect.InvocationTargetException; import org.apache.commons.lang.SystemUtils; 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.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; /** * 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 "story". If * a sample multi-page editor (also available as a template) is registered for * the same extension, it will be able to open it. */ public class StoryTemplateWizard extends Wizard implements INewWizard { private StoryTemplateWizardPage page; private ISelection selection; /** * Constructor for StoryTemplateWizard. */ public StoryTemplateWizard() { super(); setNeedsProgressMonitor(true); } /** * Adding the page to the wizard. */ public void addPages() { page = new StoryTemplateWizardPage(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 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(), "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("Creating " + fileName, 2); IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot(); IResource resource = root.findMember(new Path(containerName)); if (!resource.exists() || !(resource instanceof IContainer)) { throwCoreException("Container \"" + containerName + "\" does not exist."); } 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("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); } /** * We will initialize file contents with a sample text. */ private InputStream openContentStream() { String contents = "Given a calculator" + SystemUtils.LINE_SEPARATOR + "When i add $variable1 to $variable2" + SystemUtils.LINE_SEPARATOR + "Then the result should be $expected"; return new ByteArrayInputStream(contents.getBytes()); } private void throwCoreException(String message) throws CoreException { IStatus status = new Status(IStatus.ERROR, "pl.wroc.pwr.jbehaveplugin", 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; } }