| /******************************************************************************* |
| * 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.examples.filesystem.subscriber; |
| |
| import java.io.BufferedInputStream; |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Date; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.team.core.TeamException; |
| import org.eclipse.team.core.variants.CachedResourceVariant; |
| import org.eclipse.team.examples.filesystem.FileSystemPlugin; |
| |
| /** |
| * A file system resource variant. Although not strictly necessary, this |
| * class extends <code>CachedResourceVariant</code> which will |
| * cache the contents of the resource variant. |
| */ |
| public class FileSystemResourceVariant extends CachedResourceVariant { |
| |
| private java.io.File ioFile; |
| private byte[] bytes; |
| |
| /** |
| * Create a resource variant for the given file. The bytes will |
| * be calculated when they are accessed. |
| * @param file the file |
| */ |
| public FileSystemResourceVariant(java.io.File file) { |
| this.ioFile = file; |
| } |
| |
| /** |
| * Create a resource variant for the given file and sync bytes. |
| * @param file the file |
| * @param bytes the timestamp bytes |
| */ |
| public FileSystemResourceVariant(java.io.File file, byte[] bytes) { |
| this.ioFile = file; |
| this.bytes = bytes; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.team.core.variants.CachedResourceVariant#fetchContents(org.eclipse.core.runtime.IProgressMonitor) |
| */ |
| protected void fetchContents(IProgressMonitor monitor) throws TeamException { |
| setContents(getContents(), monitor); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.team.core.variants.CachedResourceVariant#getCachePath() |
| */ |
| protected String getCachePath() { |
| // append the timestamp to the file path to give each variant a unique path |
| return getFilePath() + " " + ioFile.lastModified(); //$NON-NLS-1$ |
| } |
| |
| private String getFilePath() { |
| try { |
| return ioFile.getCanonicalPath(); |
| } catch (IOException e) { |
| // Failed for some reason. Try the absolute path. |
| FileSystemPlugin.log(new Status(IStatus.ERROR, FileSystemPlugin.ID, 0, |
| "Failed to obtain canonical path for " + ioFile.getAbsolutePath(), e)); |
| return ioFile.getAbsolutePath(); |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.team.core.variants.CachedResourceVariant#getCacheId() |
| */ |
| protected String getCacheId() { |
| return FileSystemPlugin.ID; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.team.core.variants.IResourceVariant#getName() |
| */ |
| public String getName() { |
| return ioFile.getName(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.team.core.variants.IResourceVariant#isContainer() |
| */ |
| public boolean isContainer() { |
| return ioFile.isDirectory(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.team.core.variants.IResourceVariant#getContentIdentifier() |
| */ |
| public String getContentIdentifier() { |
| // Use the modification timestamp as the content identifier |
| return new Date(ioFile.lastModified()).toString(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.team.core.variants.IResourceVariant#asBytes() |
| */ |
| public byte[] asBytes() { |
| if (bytes == null) { |
| // For simplicity, convert the timestamp to it's string representation. |
| // A more optimal storage format would be the 8 bytes that make up the long. |
| bytes = Long.toString(ioFile.lastModified()).getBytes(); |
| } |
| return bytes; |
| } |
| |
| /** |
| * Return the files contained by the file of this resource variant. |
| * @return the files contained by the file of this resource variant. |
| */ |
| public FileSystemResourceVariant[] members() { |
| if (isContainer()) { |
| java.io.File[] members = ioFile.listFiles(); |
| FileSystemResourceVariant[] result = new FileSystemResourceVariant[members.length]; |
| for (int i = 0; i < members.length; i++) { |
| result[i] = new FileSystemResourceVariant(members[i]); |
| } |
| return result; |
| } else { |
| return new FileSystemResourceVariant[0]; |
| } |
| } |
| |
| /** |
| * @return |
| */ |
| public InputStream getContents() throws TeamException { |
| try { |
| return new BufferedInputStream(new FileInputStream(ioFile)); |
| } catch (FileNotFoundException e) { |
| throw new TeamException("Failed to fetch contents for " + getFilePath(), e); |
| } |
| } |
| } |