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/*******************************************************************************
* Copyright (c) 2000, 2006 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.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)); //$NON-NLS-1$
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();
if (members == null) {
members = new java.io.File[0];
}
FileSystemResourceVariant[] result = new FileSystemResourceVariant[members.length];
for (int i = 0; i < members.length; i++) {
result[i] = new FileSystemResourceVariant(members[i]);
}
return result;
}
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); //$NON-NLS-1$
}
}
public java.io.File getFile(){
return ioFile;
}
}
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