Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2007 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 * *******************************************************************************/ package org.eclipse.dltk.internal.ui.actions; import java.lang.reflect.InvocationTargetException; import java.net.URI; import java.util.ArrayList; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Set; import org.eclipse.core.filesystem.EFS; import org.eclipse.core.filesystem.IFileStore; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.IResource; import org.eclipse.core.resources.IWorkspaceRoot; import org.eclipse.core.resources.IWorkspaceRunnable; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IAdaptable; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.core.runtime.SubMonitor; import org.eclipse.dltk.core.DLTKCore; import org.eclipse.dltk.core.DLTKLanguageManager; import org.eclipse.dltk.core.IModelElement; import org.eclipse.dltk.core.IScriptProject; import org.eclipse.dltk.internal.core.ProjectRefreshOperation; import org.eclipse.dltk.internal.corext.util.Messages; import org.eclipse.dltk.internal.corext.util.Resources; import org.eclipse.dltk.ui.DLTKPluginImages; import org.eclipse.dltk.ui.actions.SelectionDispatchAction; import org.eclipse.dltk.ui.util.ExceptionHandler; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.ui.IWorkbenchSite; import org.eclipse.ui.IWorkingSet; import org.eclipse.ui.PlatformUI; /** * Action for refreshing the workspace from the local file system for the * selected resources and all of their descendants. This action also considers * external archives managed by the Script Model. * <p> * Action is applicable to selections containing resources and Script elements * down to compilation units. * * <p> * This class may be instantiated; it is not intended to be subclassed. * </p> */ public class RefreshAction extends SelectionDispatchAction { /** * Creates a new <code>RefreshAction</code>. The action requires that the * selection provided by the site's selection provider is of type * {@link org.eclipse.jface.viewers.IStructuredSelection} . * * @param site * the site providing context information for this action */ public RefreshAction(IWorkbenchSite site) { super(site); setText(ActionMessages.RefreshAction_label); setToolTipText(ActionMessages.RefreshAction_toolTip); DLTKPluginImages.setLocalImageDescriptors(this, "refresh_nav.gif");//$NON-NLS-1$ if (DLTKCore.DEBUG) { System.err.println("Add help support here..."); //$NON-NLS-1$ } // PlatformUI.getWorkbench().getHelpSystem().setHelp(this, // IScriptHelpContextIds.REFRESH_ACTION); } /* * (non-Javadoc) Method declared in SelectionDispatchAction */ @Override public void selectionChanged(IStructuredSelection selection) { setEnabled(checkEnabled(selection)); } private boolean checkEnabled(IStructuredSelection selection) { if (selection.isEmpty()) return true; for (Iterator<?> iter = selection.iterator(); iter.hasNext();) { Object element = iter.next(); if (element instanceof IWorkingSet) { // don't inspect working sets any deeper. } else if (element instanceof IAdaptable) { IResource resource = (IResource) ((IAdaptable) element).getAdapter(IResource.class); if (resource == null) return false; if (resource.getType() == IResource.PROJECT && !((IProject) resource).isOpen()) return false; } else { return false; } } return true; } /* * (non-Javadoc) Method declared in SelectionDispatchAction */ @Override public void run(IStructuredSelection selection) { final IResource[] resources = getResources(selection); IWorkspaceRunnable operation = new IWorkspaceRunnable() { public void run(IProgressMonitor monitor) throws CoreException { SubMonitor progess = SubMonitor.convert(monitor, ActionMessages.RefreshAction_progressMessage, resources.length * 2); List<IModelElement> modelElements = new ArrayList<IModelElement>(5); Set<IProject> affectedProjects = new HashSet<IProject>(); for (int r = 0; r < resources.length; r++) { IResource resource = resources[r]; if (resource.getType() == IResource.PROJECT) { checkLocationDeleted((IProject) resource); affectedProjects.add((IProject) resource); } else if (resource.getType() == IResource.ROOT) { IProject[] projects = ((IWorkspaceRoot) resource).getProjects(); for (int p = 0; p < projects.length; p++) { checkLocationDeleted(projects[p]); affectedProjects.add(projects[p]); } } else { affectedProjects.add(resource.getProject()); } resource.refreshLocal(IResource.DEPTH_INFINITE, progess.newChild(1)); IModelElement jElement = DLTKCore.create(resource); if (jElement != null && jElement.exists()) modelElements.add(jElement); } // IScriptModel model= // DLTKCore.create(ResourcesPlugin.getWorkspace().getRoot()); if (DLTKCore.DEBUG) { System.err.println("Add refreshing of external archives..."); //$NON-NLS-1$ } // model.refreshExternalArchives( // (IModelElement[]) modelElements.toArray(new // IModelElement[modelElements.size()]), // new SubProgressMonitor(monitor, resources.length)); final List<IScriptProject> scriptProjects = new ArrayList<IScriptProject>(affectedProjects.size()); for (IProject project : affectedProjects) { if (project.exists() && DLTKLanguageManager.hasScriptNature(project)) { scriptProjects.add(DLTKCore.create(project)); } } if (!scriptProjects.isEmpty()) { final ProjectRefreshOperation modelRefresh = new ProjectRefreshOperation( scriptProjects.toArray(new IScriptProject[scriptProjects.size()])); modelRefresh.run(progess.newChild(resources.length)); } } }; try { PlatformUI.getWorkbench().getProgressService().run(true, true, new WorkbenchRunnableAdapter(operation)); } catch (InvocationTargetException e) { ExceptionHandler.handle(e, getShell(), ActionMessages.RefreshAction_error_title, ActionMessages.RefreshAction_error_message); } catch (InterruptedException e) { // canceled } } private IResource[] getResources(IStructuredSelection selection) { if (selection.isEmpty()) { return new IResource[] { ResourcesPlugin.getWorkspace().getRoot() }; } List<IResource> result = new ArrayList<IResource>(selection.size()); getResources(result, selection.toArray()); for (Iterator<IResource> iter = result.iterator(); iter.hasNext();) { IResource resource = iter.next(); if (isDescendent(result, resource)) iter.remove(); } return result.toArray(new IResource[result.size()]); } private void getResources(List<IResource> result, Object[] elements) { for (int i = 0; i < elements.length; i++) { Object element = elements[i]; // Must check working set before IAdaptable since WorkingSet // implements IAdaptable if (element instanceof IWorkingSet) { getResources(result, ((IWorkingSet) element).getElements()); } else if (element instanceof IAdaptable) { IResource resource = (IResource) ((IAdaptable) element).getAdapter(IResource.class); if (resource == null) continue; if (resource.getType() != IResource.PROJECT || (resource.getType() == IResource.PROJECT && ((IProject) resource).isOpen())) { result.add(resource); } } } } private boolean isDescendent(List<IResource> candidates, IResource element) { IResource parent = element.getParent(); while (parent != null) { if (candidates.contains(parent)) return true; parent = parent.getParent(); } return false; } private void checkLocationDeleted(IProject project) throws CoreException { if (!project.exists()) return; URI location = project.getLocationURI(); if (location == null) return; IFileStore store = EFS.getStore(location); if (!store.fetchInfo().exists()) { final String message = Messages.format(ActionMessages.RefreshAction_locationDeleted_message, new Object[] { project.getName(), Resources.getLocationString(project) }); final boolean[] result = new boolean[1]; // Must prompt user in UI thread (we're in the operation thread // here). getShell().getDisplay().syncExec(new Runnable() { public void run() { result[0] = MessageDialog.openQuestion(getShell(), ActionMessages.RefreshAction_locationDeleted_title, message); } }); if (result[0]) { project.delete(true, true, null); } } } }