| /******************************************************************************* |
| * Copyright (c) 2006, 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 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.ui.ide.undo; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.InputStream; |
| import java.net.URI; |
| |
| import org.eclipse.core.resources.IFile; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.ui.internal.ide.undo.ContainerDescription; |
| import org.eclipse.ui.internal.ide.undo.FileDescription; |
| import org.eclipse.ui.internal.ide.undo.IFileContentDescription; |
| |
| /** |
| * A CreateFileOperation represents an undoable operation for creating a file in |
| * the workspace. If a link location is specified, the folder is considered to |
| * be linked to the file at the specified location. If a link location is not |
| * specified, the file will be created in the location specified by the handle, |
| * and the entire containment path of the file will be created if it does not |
| * exist. Clients may call the public API from a background thread. |
| * |
| * This class is intended to be instantiated and used by clients. It is not |
| * intended to be subclassed by clients. |
| * |
| * @since 3.3 |
| * |
| */ |
| public class CreateFileOperation extends AbstractCreateResourcesOperation { |
| |
| /** |
| * Create a CreateFileOperation |
| * |
| * @param fileHandle |
| * the file to be created |
| * @param linkLocation |
| * the location of the file if it is to be linked |
| * @param contents |
| * the initial contents of the file, or null if there is to be no |
| * contents |
| * @param label |
| * the label of the operation |
| */ |
| public CreateFileOperation(IFile fileHandle, URI linkLocation, |
| InputStream contents, String label) { |
| super(null, label); |
| ResourceDescription resourceDescription; |
| if (fileHandle.getParent().exists()) { |
| resourceDescription = new FileDescription(fileHandle, linkLocation, |
| createFileContentDescription(fileHandle, contents)); |
| } else { |
| // must first ensure descriptions for the parent folders are |
| // created |
| ContainerDescription containerDescription = ContainerDescription |
| .fromContainer(fileHandle.getParent()); |
| containerDescription.getFirstLeafFolder() |
| .addMember( |
| new FileDescription(fileHandle, linkLocation, |
| createFileContentDescription(fileHandle, |
| contents))); |
| resourceDescription = containerDescription; |
| } |
| setResourceDescriptions(new ResourceDescription[] { resourceDescription }); |
| |
| } |
| |
| /* |
| * Create a file state that represents the desired contents and attributes |
| * of the file to be created. Used to mimic file history when a resource is |
| * first created. |
| */ |
| private IFileContentDescription createFileContentDescription( |
| final IFile file, final InputStream contents) { |
| return new IFileContentDescription() { |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.ui.internal.ide.undo.IFileContentDescription#getContents() |
| */ |
| public InputStream getContents() { |
| if (contents != null) { |
| return contents; |
| } |
| return new ByteArrayInputStream(new byte[0]); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.ui.internal.ide.undo.IFileContentDescription#getCharset() |
| */ |
| public String getCharset() { |
| try { |
| return file.getCharset(false); |
| } catch (CoreException e) { |
| return null; |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.ui.internal.ide.undo.IFileContentDescription#exists() |
| */ |
| public boolean exists() { |
| return true; |
| } |
| }; |
| } |
| } |