| /******************************************************************************* |
| * Copyright (c) 2000, 2011 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 org.eclipse.jdt.internal.ui.javaeditor; |
| |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.eclipse.core.runtime.Assert; |
| import org.eclipse.core.runtime.CoreException; |
| |
| import org.eclipse.ui.IEditorInput; |
| |
| import org.eclipse.jdt.core.ICompilationUnit; |
| |
| import org.eclipse.jdt.internal.corext.util.JavaModelUtil; |
| |
| import org.eclipse.jdt.ui.IWorkingCopyManager; |
| import org.eclipse.jdt.ui.IWorkingCopyManagerExtension; |
| |
| |
| /** |
| * This working copy manager works together with a given compilation unit document provider and |
| * additionally offers to "overwrite" the working copy provided by this document provider. |
| */ |
| public class WorkingCopyManager implements IWorkingCopyManager, IWorkingCopyManagerExtension { |
| |
| private ICompilationUnitDocumentProvider fDocumentProvider; |
| private Map<IEditorInput, ICompilationUnit> fMap; |
| private boolean fIsShuttingDown; |
| |
| /** |
| * Creates a new working copy manager that co-operates with the given |
| * compilation unit document provider. |
| * |
| * @param provider the provider |
| */ |
| public WorkingCopyManager(ICompilationUnitDocumentProvider provider) { |
| Assert.isNotNull(provider); |
| fDocumentProvider= provider; |
| } |
| |
| /* |
| * @see org.eclipse.jdt.ui.IWorkingCopyManager#connect(org.eclipse.ui.IEditorInput) |
| */ |
| public void connect(IEditorInput input) throws CoreException { |
| fDocumentProvider.connect(input); |
| } |
| |
| /* |
| * @see org.eclipse.jdt.ui.IWorkingCopyManager#disconnect(org.eclipse.ui.IEditorInput) |
| */ |
| public void disconnect(IEditorInput input) { |
| fDocumentProvider.disconnect(input); |
| } |
| |
| /* |
| * @see org.eclipse.jdt.ui.IWorkingCopyManager#shutdown() |
| */ |
| public void shutdown() { |
| if (!fIsShuttingDown) { |
| fIsShuttingDown= true; |
| try { |
| if (fMap != null) { |
| fMap.clear(); |
| fMap= null; |
| } |
| fDocumentProvider.shutdown(); |
| } finally { |
| fIsShuttingDown= false; |
| } |
| } |
| } |
| |
| /* |
| * @see org.eclipse.jdt.ui.IWorkingCopyManager#getWorkingCopy(org.eclipse.ui.IEditorInput) |
| */ |
| public ICompilationUnit getWorkingCopy(IEditorInput input) { |
| return getWorkingCopy(input, true); |
| } |
| |
| /** |
| * Returns the working copy remembered for the compilation unit encoded in the |
| * given editor input. |
| * <p> |
| * Note: This method must not be part of the public {@link IWorkingCopyManager} API. |
| * </p> |
| * |
| * @param input the editor input |
| * @param primaryOnly if <code>true</code> only primary working copies will be returned |
| * @return the working copy of the compilation unit, or <code>null</code> if the |
| * input does not encode an editor input, or if there is no remembered working |
| * copy for this compilation unit |
| * @since 3.2 |
| */ |
| public ICompilationUnit getWorkingCopy(IEditorInput input, boolean primaryOnly) { |
| ICompilationUnit unit= fMap == null ? null : fMap.get(input); |
| if (unit == null) |
| unit= fDocumentProvider.getWorkingCopy(input); |
| if (unit != null && (!primaryOnly || JavaModelUtil.isPrimary(unit))) |
| return unit; |
| return null; |
| } |
| |
| /* |
| * @see org.eclipse.jdt.internal.ui.javaeditor.IWorkingCopyManagerExtension#setWorkingCopy(org.eclipse.ui.IEditorInput, org.eclipse.jdt.core.ICompilationUnit) |
| */ |
| public void setWorkingCopy(IEditorInput input, ICompilationUnit workingCopy) { |
| if (fDocumentProvider.getDocument(input) != null) { |
| if (fMap == null) |
| fMap= new HashMap<IEditorInput, ICompilationUnit>(); |
| fMap.put(input, workingCopy); |
| } |
| } |
| |
| /* |
| * @see org.eclipse.jdt.internal.ui.javaeditor.IWorkingCopyManagerExtension#removeWorkingCopy(org.eclipse.ui.IEditorInput) |
| */ |
| public void removeWorkingCopy(IEditorInput input) { |
| fMap.remove(input); |
| if (fMap.isEmpty()) |
| fMap= null; |
| } |
| } |