Java tutorial
/******************************************************************************* * Copyright (c) 2015 IBM Corporation 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: * IBM Corporation - initial API and implementation *******************************************************************************/ package metabup.annotations.wizards; import java.io.File; import java.io.IOException; import java.lang.reflect.InvocationTargetException; import java.net.URL; import metabup.annotations.Activator; import metabup.annotations.general.AnnotationHandler; import metabup.annotations.preferences.AnnotationsPluginPreferenceConstants; import org.eclipse.core.resources.IFolder; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.IProjectDescription; 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.FileLocator; 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.jdt.core.IClasspathEntry; import org.eclipse.jdt.core.ICompilationUnit; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.IPackageFragment; import org.eclipse.jdt.core.IPackageFragmentRoot; import org.eclipse.jdt.core.JavaCore; import org.eclipse.jdt.launching.JavaRuntime; 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.IWorkbenchWizard; import org.osgi.framework.Bundle; /** * 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 * "java". 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 NewAnnotationWizard extends Wizard implements INewWizard { private NewAnnotationWizardPage page; private ISelection selection; /** * Constructor for NewAnnotationWizard. */ public NewAnnotationWizard() { super(); setNeedsProgressMonitor(true); } /** * Adding the page to the wizard. */ public void addPages() { page = new NewAnnotationWizardPage(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 projectName = page.getProjectName(); final String fileName = page.getFileName(); final String annotationName = page.getAnnotationName(); final String description = page.getDescription(); IRunnableWithProgress op = new IRunnableWithProgress() { public void run(IProgressMonitor monitor) throws InvocationTargetException { try { doFinish(projectName, fileName, annotationName, description, 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 projectName, String fileName, String annotationName, String description, IProgressMonitor monitor) throws CoreException { // create a sample file monitor.beginTask("Creating " + fileName, 2); IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot(); IResource resource = root.findMember(new Path(projectName)); if (!resource.exists() || !(resource instanceof IProject)) throwCoreException("Project \"" + projectName + "\" does not exist."); monitor.worked(1); IProject project = (IProject) resource; /* * Turn project into a Java project, if not yet */ IProjectDescription projectDescription = project.getDescription(); String javaNature[] = { JavaCore.NATURE_ID }; String projectNatures[] = projectDescription.getNatureIds(); boolean isJavaEnabled = false; for (int i = 0; i < projectNatures.length; i++) { if (projectNatures[i].equals(javaNature[0])) { isJavaEnabled = true; i = projectNatures.length; } } IJavaProject javaProject = JavaCore.create(project); if (!isJavaEnabled) { IProjectDescription pDescription = project.getDescription(); pDescription.setNatureIds(new String[] { JavaCore.NATURE_ID }); project.setDescription(pDescription, monitor); IFolder binFolder = project.getFolder("bin"); if (!binFolder.exists()) binFolder.create(false, true, monitor); javaProject.setOutputLocation(binFolder.getFullPath(), monitor); } monitor.worked(1); //Import Activator library Bundle plugin = Activator.getDefault().getBundle(); IPath relativePagePath = new Path(AnnotationsPluginPreferenceConstants.P_ANNOTATIONS_LIB_FILES); URL fileInPlugin = FileLocator.find(plugin, relativePagePath, null); if (fileInPlugin != null) { // the file exists URL fileUrl; try { fileUrl = FileLocator.toFileURL(fileInPlugin); File file = new File(fileUrl.getPath()); IClasspathEntry libEntry[] = { JavaCore.newLibraryEntry(new Path(file.getAbsolutePath()), null, // no source null, // no source false) }; // not exported monitor.worked(1); //set the build path IClasspathEntry[] buildPath = { JavaCore.newSourceEntry(project.getFullPath().append("src")), JavaRuntime.getDefaultJREContainerEntry(), libEntry[0] }; javaProject.setRawClasspath(buildPath, project.getFullPath().append("bin"), null); IFolder srcFolder = project.getFolder("src"); if (!srcFolder.exists()) srcFolder.create(true, true, monitor); project.refreshLocal(IResource.DEPTH_INFINITE, monitor); monitor.worked(1); //Add folder to Java element IPackageFragmentRoot folder = javaProject.getPackageFragmentRoot(srcFolder); //create package fragment IPackageFragment fragment = folder.createPackageFragment( AnnotationsPluginPreferenceConstants.P_ANNOTATIONS_PACKAGE, true, monitor); StringBuffer buffer = new StringBuffer(); ICompilationUnit cu = fragment.createCompilationUnit(fileName, AnnotationHandler.generateInstanceCode(buffer, annotationName, description).toString(), false, monitor); project.refreshLocal(IResource.DEPTH_INFINITE, monitor); monitor.worked(1); project.refreshLocal(IResource.DEPTH_INFINITE, monitor); } catch (IOException e) { // TODO Auto-generated catch block Activator.log(IStatus.ERROR, "Activator library couldn't be added to the java build path."); } } else { Activator.log(IStatus.ERROR, "Activator library couldn't be added to the java build path."); } /*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.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 = "package " + "import metabup.annotations.interfaces.IAnnotation;"; return new ByteArrayInputStream(contents.getBytes()); }*/ private void throwCoreException(String message) throws CoreException { IStatus status = new Status(IStatus.ERROR, "metabup.annotations", 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; } }