| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.team.internal.ccvs.ui.operations; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.MultiStatus; |
| import org.eclipse.core.runtime.OperationCanceledException; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.core.runtime.jobs.ISchedulingRule; |
| import org.eclipse.jface.dialogs.IDialogConstants; |
| import org.eclipse.jface.dialogs.MessageDialog; |
| import org.eclipse.jface.operation.IRunnableWithProgress; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.team.internal.ccvs.core.CVSException; |
| import org.eclipse.team.internal.ccvs.core.CVSStatus; |
| import org.eclipse.team.internal.ccvs.core.util.Assert; |
| import org.eclipse.team.internal.ccvs.ui.CVSUIPlugin; |
| import org.eclipse.team.internal.ccvs.ui.ICVSUIConstants; |
| import org.eclipse.team.internal.ccvs.ui.Policy; |
| |
| |
| /** |
| * This class is the abstract superclass for CVS operations. It provides |
| * error handling, prompting and other UI. |
| */ |
| public abstract class CVSOperation implements IRunnableWithProgress { |
| |
| private int statusCount; |
| |
| private boolean involvesMultipleResources = false; |
| |
| private List errors = new ArrayList(); // of IStatus |
| |
| protected static final IStatus OK = Status.OK_STATUS; //$NON-NLS-1$ |
| |
| // shell to be used if the runnabl context is a blocking context |
| private Shell shell; |
| private boolean modifiesWorkspace = true; |
| |
| // instance variable used to indicate behavior while prompting for overwrite |
| private boolean confirmOverwrite = true; |
| |
| ICVSRunnableContext cvsRunnableContext; |
| |
| public CVSOperation(Shell shell) { |
| this.shell = shell; |
| } |
| |
| /** |
| * Run the operation. Progress feedback will be provided by one of the following mechanisms |
| * (in priotiry order): |
| * <ol> |
| * <li>the runnable context assigned to the operation |
| * <li>a background job (if supported by the operation and enabled through the preferences) |
| * <li>the workbench active page |
| * </ol> |
| * @throws CVSException |
| * @throws InterruptedException |
| */ |
| public synchronized void run() throws CVSException, InterruptedException { |
| ICVSRunnableContext context = getCVSRunnableContext(); |
| try { |
| getCVSRunnableContext().run(getTaskName(), getSchedulingRule(), getPostponeBuild(), this); |
| } catch (InvocationTargetException e) { |
| throw CVSException.wrapException(e); |
| } catch (OperationCanceledException e) { |
| throw new InterruptedException(); |
| } |
| } |
| |
| protected boolean areJobsEnabled() { |
| return CVSUIPlugin.getPlugin().getPreferenceStore().getBoolean(ICVSUIConstants.BACKGROUND_OPERATIONS); |
| } |
| |
| /** |
| * Returns true if the operation can be run as a background job. |
| * The default is to support running as a job. Subclass should override |
| * to prevent background execution of the operation. |
| * @return whether operation can be run as a job |
| */ |
| public boolean canRunAsJob() { |
| return true; |
| } |
| |
| /** |
| * Return the scheduling rule that defines the scope of the whole operation. |
| * This method must either return <code>null</code> (in which case, code executed |
| * by the operation can attempt to obtain any scheduling rules they like but may be |
| * blocked by other jobs at that point) or a rule (e.g. IResource) that encompasses |
| * all scheduling rules used by code nested in the operation (in which case the |
| * operation wil not start until the encompassing rule is free but once the |
| * operation starts, nested rules will not block on any subsequent contained |
| * scheduling rules). By default, <code>null</code> is returned. |
| * @return |
| */ |
| protected ISchedulingRule getSchedulingRule() { |
| return null; |
| } |
| |
| /** |
| * Return whether the auto-build should be postponed whil ethe operation is running. |
| * The default is to postone a build. |
| * @return |
| */ |
| protected boolean getPostponeBuild() { |
| return true; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.operation.IRunnableWithProgress#run(org.eclipse.core.runtime.IProgressMonitor) |
| */ |
| public final void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException { |
| startOperation(); |
| try { |
| execute(monitor); |
| endOperation(); |
| } catch (CVSException e) { |
| // TODO: errors may not be empty (i.e. endOperation has not been executed) |
| throw new InvocationTargetException(e); |
| } |
| } |
| |
| protected void startOperation() { |
| statusCount = 0; |
| resetErrors(); |
| confirmOverwrite = true; |
| } |
| |
| protected void endOperation() throws CVSException { |
| handleErrors((IStatus[]) errors.toArray(new IStatus[errors.size()])); |
| } |
| |
| /** |
| * Subclasses must override this method to perform the operation. |
| * Clients should never call this method directly. |
| * |
| * @param monitor |
| * @throws CVSException |
| * @throws InterruptedException |
| */ |
| protected abstract void execute(IProgressMonitor monitor) throws CVSException, InterruptedException; |
| |
| /* |
| * Return the ICVSRunnableContext which will be used to run the operation. |
| */ |
| private ICVSRunnableContext getCVSRunnableContext() { |
| if (cvsRunnableContext == null) { |
| if (canRunAsJob() && areJobsEnabled()) { |
| return new CVSNonblockingRunnableContext(); |
| } else { |
| return new CVSBlockingRunnableContext(shell); |
| } |
| } |
| return cvsRunnableContext; |
| } |
| |
| /** |
| * Set the CVS runnable context to be used by the operation. |
| * Although this method can be used by clients, it's main |
| * purpose is to support the running of headless operations |
| * for testing purposes. |
| * @param cvsRunnableContext |
| */ |
| public void setCVSRunnableContext(ICVSRunnableContext cvsRunnableContext) { |
| this.cvsRunnableContext = cvsRunnableContext; |
| } |
| |
| public Shell getShell() { |
| return getCVSRunnableContext().getShell(); |
| } |
| |
| public boolean isModifiesWorkspace() { |
| return modifiesWorkspace; |
| } |
| |
| public void setModifiesWorkspace(boolean b) { |
| modifiesWorkspace = b; |
| } |
| |
| protected void addError(IStatus status) { |
| if (status.isOK()) return; |
| if (isLastError(status)) return; |
| errors.add(status); |
| } |
| |
| protected void collectStatus(IStatus status) { |
| if (isLastError(status)) return; |
| statusCount++; |
| if (!status.isOK()) addError(status); |
| } |
| |
| protected void resetErrors() { |
| errors.clear(); |
| statusCount = 0; |
| } |
| |
| /** |
| * Get the last error taht occured. This can be useful when a method |
| * has a return type but wants to signal an error. The method in question |
| * can add the error using <code>addError(IStatus)</code> and return null. |
| * The caller can then query the error using this method. Also, <code>addError(IStatus)</code> |
| * will not add the error if it is already on the end of the list (using identity comparison) |
| * which allows the caller to still perform a <code>collectStatus(IStatus)</code> |
| * to get a valid operation count. |
| * @return |
| */ |
| protected IStatus getLastError() { |
| Assert.isTrue(errors.size() > 0); |
| IStatus status = (IStatus)errors.get(errors.size() - 1); |
| return status; |
| } |
| |
| private boolean isLastError(IStatus status) { |
| return (errors.size() > 0 && getLastError() == status); |
| } |
| |
| protected void handleErrors(IStatus[] errors) throws CVSException { |
| if (errors.length == 0) return; |
| if (errors.length == 1 && statusCount == 1) { |
| throw new CVSException(errors[0]); |
| } |
| MultiStatus result = new MultiStatus(CVSUIPlugin.ID, 0, getErrorMessage(errors, statusCount), null); |
| for (int i = 0; i < errors.length; i++) { |
| IStatus s = errors[i]; |
| if (s.isMultiStatus()) { |
| result.add(new CVSStatus(s.getSeverity(), s.getMessage(), s.getException())); |
| result.addAll(s); |
| } else { |
| result.add(s); |
| } |
| } |
| throw new CVSException(result); |
| } |
| |
| protected String getErrorMessage(IStatus[] failures, int totalOperations) { |
| return Policy.bind("CVSOperation.0", String.valueOf(failures.length), String.valueOf(totalOperations)); //$NON-NLS-1$ |
| } |
| |
| /** |
| * This method prompts the user to overwrite an existing resource. It uses the |
| * <code>involvesMultipleResources</code> to determine what buttons to show. |
| * @param project |
| * @return |
| */ |
| protected boolean promptToOverwrite(String title, String msg) { |
| if (!confirmOverwrite) { |
| return true; |
| } |
| String buttons[]; |
| if (involvesMultipleResources()) { |
| buttons = new String[] { |
| IDialogConstants.YES_LABEL, |
| IDialogConstants.YES_TO_ALL_LABEL, |
| IDialogConstants.NO_LABEL, |
| IDialogConstants.CANCEL_LABEL}; |
| } else { |
| buttons = new String[] {IDialogConstants.OK_LABEL, IDialogConstants.CANCEL_LABEL}; |
| } |
| Shell displayShell = getShell(); |
| final MessageDialog dialog = |
| new MessageDialog(displayShell, title, null, msg, MessageDialog.QUESTION, buttons, 0); |
| |
| // run in syncExec because callback is from an operation, |
| // which is probably not running in the UI thread. |
| displayShell.getDisplay().syncExec( |
| new Runnable() { |
| public void run() { |
| dialog.open(); |
| } |
| }); |
| if (involvesMultipleResources()) { |
| switch (dialog.getReturnCode()) { |
| case 0://Yes |
| return true; |
| case 1://Yes to all |
| confirmOverwrite = false; |
| return true; |
| case 2://No |
| return false; |
| case 3://Cancel |
| default: |
| throw new OperationCanceledException(); |
| } |
| } else { |
| return dialog.getReturnCode() == 0; |
| } |
| } |
| |
| /** |
| * This method is used by <code>promptToOverwrite</code> to determine which |
| * buttons to show in the prompter. |
| * |
| * @return |
| */ |
| protected boolean involvesMultipleResources() { |
| return involvesMultipleResources; |
| } |
| |
| public void setInvolvesMultipleResources(boolean b) { |
| involvesMultipleResources = b; |
| } |
| |
| /** |
| * Return the string that is to be used as the task name for the operation |
| * |
| * @param remoteFolders |
| * @return |
| */ |
| protected abstract String getTaskName(); |
| |
| } |