| /******************************************************************************* |
| * Copyright (c) 2005, 2008 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ltk.internal.ui.refactoring.model; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.eclipse.team.core.mapping.IStorageMerger; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| |
| import org.eclipse.core.resources.IStorage; |
| |
| import org.eclipse.ltk.core.refactoring.RefactoringDescriptor; |
| import org.eclipse.ltk.core.refactoring.RefactoringSessionDescriptor; |
| import org.eclipse.ltk.internal.core.refactoring.IRefactoringSerializationConstants; |
| import org.eclipse.ltk.internal.core.refactoring.history.DefaultRefactoringDescriptor; |
| import org.eclipse.ltk.internal.core.refactoring.history.RefactoringHistoryManager; |
| import org.eclipse.ltk.internal.ui.refactoring.RefactoringUIMessages; |
| import org.eclipse.ltk.internal.ui.refactoring.RefactoringUIPlugin; |
| |
| /** |
| * Stream merger for refactoring history files. |
| * |
| * @since 3.2 |
| */ |
| public final class RefactoringHistoryMerger implements IStorageMerger { |
| |
| /** |
| * Creates a new refactoring history merger. |
| */ |
| public RefactoringHistoryMerger() { |
| // Do nothing |
| } |
| |
| @Override |
| public boolean canMergeWithoutAncestor() { |
| return true; |
| } |
| |
| @Override |
| public IStatus merge(final OutputStream output, final String encoding, final IStorage ancestor, final IStorage target, final IStorage other, final IProgressMonitor monitor) throws CoreException { |
| InputStream targetStream= null; |
| InputStream sourceStream= null; |
| try { |
| targetStream= target.getContents(); |
| sourceStream= target.getContents(); |
| performMerge(output, targetStream, sourceStream); |
| } catch (CoreException exception) { |
| return new Status(IStatus.ERROR, RefactoringUIPlugin.getPluginId(), 1, RefactoringUIMessages.RefactoringHistoryMerger_error_auto_merge, exception); |
| } finally { |
| if (targetStream != null) { |
| try { |
| targetStream.close(); |
| } catch (IOException exception) { |
| // Do nothing |
| } |
| } |
| if (sourceStream != null) { |
| try { |
| sourceStream.close(); |
| } catch (IOException exception) { |
| // Do nothing |
| } |
| } |
| } |
| return Status.OK_STATUS; |
| } |
| |
| /** |
| * Performs the actual merge operation. |
| * |
| * @param output |
| * the output stream |
| * @param target |
| * the target input stream |
| * @param source |
| * the source input stream |
| * @throws CoreException |
| * if an error occurs |
| */ |
| private void performMerge(final OutputStream output, final InputStream target, final InputStream source) throws CoreException { |
| final DefaultRefactoringDescriptor[] sourceDescriptors= RefactoringHistoryManager.readRefactoringDescriptors(source); |
| final DefaultRefactoringDescriptor[] targetDescriptors= RefactoringHistoryManager.readRefactoringDescriptors(target); |
| final Set<DefaultRefactoringDescriptor> set= new HashSet<>(); |
| for (int index= 0; index < sourceDescriptors.length; index++) |
| set.add(sourceDescriptors[index]); |
| for (int index= 0; index < targetDescriptors.length; index++) |
| set.add(targetDescriptors[index]); |
| final RefactoringDescriptor[] outputDescriptors= new RefactoringDescriptor[set.size()]; |
| set.toArray(outputDescriptors); |
| RefactoringHistoryManager.sortRefactoringDescriptorsAscending(outputDescriptors); |
| RefactoringHistoryManager.writeRefactoringSession(output, new RefactoringSessionDescriptor(outputDescriptors, IRefactoringSerializationConstants.CURRENT_VERSION, null), true); |
| } |
| } |