Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2006 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 descent.internal.ui.wizards.buildpaths.newsourcepage; import java.lang.reflect.InvocationTargetException; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.NullProgressMonitor; import org.eclipse.core.runtime.SubProgressMonitor; import org.eclipse.core.resources.IResource; import org.eclipse.swt.widgets.Shell; import org.eclipse.jface.action.Action; import org.eclipse.jface.dialogs.ErrorDialog; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.operation.IRunnableWithProgress; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.ui.IWorkbenchPage; import org.eclipse.ui.IWorkbenchPart; import org.eclipse.ui.IWorkbenchPartReference; import org.eclipse.ui.IWorkbenchSite; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.part.ISetSelectionTarget; import descent.core.ICompilationUnit; import descent.core.IJavaElement; import descent.core.IJavaProject; import descent.core.IPackageFragment; import descent.core.IPackageFragmentRoot; import descent.core.JavaModelException; import descent.internal.corext.buildpath.ClasspathModifier; import descent.internal.ui.JavaPlugin; import descent.internal.ui.JavaPluginImages; import descent.internal.ui.wizards.NewWizardMessages; import descent.internal.ui.wizards.buildpaths.CPListElement; public class ExcludeFromBuildpathAction extends Action implements ISelectionChangedListener { private final IWorkbenchSite fSite; private final List fSelectedElements; //IPackageFragment || ICompilationUnit iff isEnabled() public ExcludeFromBuildpathAction(IWorkbenchSite site) { super(NewWizardMessages.NewSourceContainerWorkbookPage_ToolBar_Exclude_label, JavaPluginImages.DESC_ELCL_EXCLUDE_FROM_BUILDPATH); setToolTipText(NewWizardMessages.NewSourceContainerWorkbookPage_ToolBar_Exclude_tooltip); setDisabledImageDescriptor(JavaPluginImages.DESC_DLCL_EXCLUDE_FROM_BUILDPATH); fSite = site; fSelectedElements = new ArrayList(); } /** * {@inheritDoc} */ public void run() { final IJavaProject project; Object object = fSelectedElements.get(0); if (object instanceof ICompilationUnit) { project = ((ICompilationUnit) object).getJavaProject(); } else { project = ((IPackageFragment) object).getJavaProject(); } try { final IRunnableWithProgress runnable = new IRunnableWithProgress() { public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException { try { List result = exclude(fSelectedElements, project, monitor); selectAndReveal(new StructuredSelection(result)); } catch (CoreException e) { throw new InvocationTargetException(e); } } }; PlatformUI.getWorkbench().getProgressService().run(true, false, runnable); } catch (final InvocationTargetException e) { if (e.getCause() instanceof CoreException) { showExceptionDialog((CoreException) e.getCause()); } else { JavaPlugin.log(e); } } catch (final InterruptedException e) { } } private List exclude(List javaElements, IJavaProject project, IProgressMonitor monitor) throws JavaModelException { if (monitor == null) monitor = new NullProgressMonitor(); try { monitor.beginTask(NewWizardMessages.ClasspathModifier_Monitor_Excluding, javaElements.size() + 4); List existingEntries = ClasspathModifier.getExistingEntries(project); List resources = new ArrayList(); for (int i = 0; i < javaElements.size(); i++) { IJavaElement javaElement = (IJavaElement) javaElements.get(i); IPackageFragmentRoot root = (IPackageFragmentRoot) javaElement .getAncestor(IJavaElement.PACKAGE_FRAGMENT_ROOT); CPListElement entry = ClasspathModifier.getClasspathEntry(existingEntries, root); IResource resource = ClasspathModifier.exclude(javaElement, entry, project, new SubProgressMonitor(monitor, 1)); if (resource != null) { resources.add(resource); } } ClasspathModifier.commitClassPath(existingEntries, project, new SubProgressMonitor(monitor, 4)); return resources; } finally { monitor.done(); } } /** * {@inheritDoc} */ public void selectionChanged(final SelectionChangedEvent event) { final ISelection selection = event.getSelection(); if (selection instanceof IStructuredSelection) { setEnabled(canHandle((IStructuredSelection) selection)); } else { setEnabled(canHandle(StructuredSelection.EMPTY)); } } private boolean canHandle(IStructuredSelection elements) { if (elements.size() == 0) return false; try { fSelectedElements.clear(); for (Iterator iter = elements.iterator(); iter.hasNext();) { Object element = iter.next(); fSelectedElements.add(element); if (element instanceof IPackageFragment) { int type = DialogPackageExplorerActionGroup.getType(element, ((IPackageFragment) element).getJavaProject()); if (type != DialogPackageExplorerActionGroup.INCLUDED_FOLDER && type != DialogPackageExplorerActionGroup.PACKAGE_FRAGMENT) return false; } else if (element instanceof ICompilationUnit) { } else { return false; } } return true; } catch (CoreException e) { } return false; } private void showExceptionDialog(CoreException exception) { showError(exception, fSite.getShell(), NewWizardMessages.ExcludeFromBuildathAction_ErrorTitle, exception.getMessage()); } private void showError(CoreException e, Shell shell, String title, String message) { IStatus status = e.getStatus(); if (status != null) { ErrorDialog.openError(shell, message, title, status); } else { MessageDialog.openError(shell, title, message); } } private void selectAndReveal(final ISelection selection) { // validate the input IWorkbenchPage page = fSite.getPage(); if (page == null) return; // get all the view and editor parts List parts = new ArrayList(); IWorkbenchPartReference refs[] = page.getViewReferences(); for (int i = 0; i < refs.length; i++) { IWorkbenchPart part = refs[i].getPart(false); if (part != null) parts.add(part); } refs = page.getEditorReferences(); for (int i = 0; i < refs.length; i++) { if (refs[i].getPart(false) != null) parts.add(refs[i].getPart(false)); } Iterator itr = parts.iterator(); while (itr.hasNext()) { IWorkbenchPart part = (IWorkbenchPart) itr.next(); // get the part's ISetSelectionTarget implementation ISetSelectionTarget target = null; if (part instanceof ISetSelectionTarget) target = (ISetSelectionTarget) part; else target = (ISetSelectionTarget) part.getAdapter(ISetSelectionTarget.class); if (target != null) { // select and reveal resource final ISetSelectionTarget finalTarget = target; page.getWorkbenchWindow().getShell().getDisplay().asyncExec(new Runnable() { public void run() { finalTarget.selectReveal(selection); } }); } } } }