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/*******************************************************************************
* Copyright (c) 2007, 2009 Oracle. 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:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.gen.internal.util;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.jar.JarInputStream;
import java.util.jar.Manifest;
import java.util.zip.ZipEntry;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Platform;
import org.eclipse.osgi.service.datalocation.Location;
import org.osgi.framework.Bundle;
/**
* Collections of utility methods handling files.
*
*/
public class FileUtil
{
private static String DELETE_FOLDER_ERR = "The directory %s could not be deleted.";
private static String DELETE_FILE_ERR = "The file %s could not be deleted.";
private static String FILE_READONLY_ERR = "The file %s could not be modified because write access is denied.\nPlease make sure that the file is not marked as readonly in the file system.";
public static void deleteFolder(File folder)
throws IOException
{
File[] files = folder.listFiles();
//empty the folder first (java.io.file.delete requires it empty)
if (files != null) {
for (int i = 0; i < files.length; ++i) {
File f = files[i];
if (f.isDirectory())
deleteFolder(f);
else
deletePath(f);
}
}
deletePath(folder);
}
public static void deletePath(File f)
throws IOException
{
if (!f.delete()) {
String msgId = f.isDirectory() ? DELETE_FOLDER_ERR : DELETE_FILE_ERR;
throw new IOException( String.format(msgId,f.getPath()));
}
}
public static byte[] readFile(File src)
throws IOException
{
java.io.FileInputStream fin = new java.io.FileInputStream(src);
try {
long fileLen = src.length();
if (fileLen > Integer.MAX_VALUE)
throw new IOException("file length too big to be read by FileUtil.readFile: " + fileLen);
byte[] bytes = new byte[(int)fileLen];
fin.read(bytes);
return bytes;
}
finally {
fin.close();
}
}
public static void writeFile(File dest, byte[] bytes)
throws IOException
{
if (dest.exists() && !dest.canWrite())
throw new IOException( FILE_READONLY_ERR ); //throw with a clear error because otherwise FileOutputStream throws FileNotFoundException!
java.io.FileOutputStream fout = new java.io.FileOutputStream(dest.getPath(), false/*append*/);
try {
fout.write(bytes);
}
finally {
fout.flush();
fout.close();
}
}
/**
* Returns the url for a file.
* This basically the same as file.toUrl() but without the non-sense exception.
*/
public static URL getFileUrl(File file) {
try {
return file.toURI().toURL();
} catch (MalformedURLException e) {
return null; //should not happen as file.toURL() does not really throw an exception
}
}
public static void setFileContent(File file, java.io.InputStream contents) throws java.io.IOException {
Path path = new Path(file.getAbsolutePath());
try {
IFile iFile = ResourcesPlugin.getWorkspace().getRoot().getFileForLocation(path);
if (iFile == null) {
throw new IOException("The path " + file + " does not seem to be a valid file path.");
}
iFile.setContents(contents, true/*force*/, true/*keepHistory*/, null/*monitor*/);
} catch (CoreException ex) {
throw new IOException(ex.getMessage());
}
}
/**
* Extract the contents of a Jar archive to the specified destination.
*/
public static void unjar(InputStream in, File dest) throws IOException {
if (!dest.exists()) {
dest.mkdirs();
}
if (!dest.isDirectory()) {
throw new IOException("Destination must be a directory.");//$NON-NLS-1$
}
JarInputStream jin = new JarInputStream(in);
byte[] buffer = new byte[1024];
ZipEntry entry = jin.getNextEntry();
while (entry != null) {
String fileName = entry.getName();
if (fileName.charAt(fileName.length() - 1) == '/') {
fileName = fileName.substring(0, fileName.length() - 1);
}
if (fileName.charAt(0) == '/') {
fileName = fileName.substring(1);
}
if (File.separatorChar != '/') {
fileName = fileName.replace('/', File.separatorChar);
}
File file = new File(dest, fileName);
if (entry.isDirectory()) {
// make sure the directory exists
file.mkdirs();
jin.closeEntry();
} else {
// make sure the directory exists
File parent = file.getParentFile();
if (parent != null && !parent.exists()) {
parent.mkdirs();
}
// dump the file
OutputStream out = new FileOutputStream(file);
int len = 0;
while ((len = jin.read(buffer, 0, buffer.length)) != -1) {
out.write(buffer, 0, len);
}
out.flush();
out.close();
jin.closeEntry();
file.setLastModified(entry.getTime());
}
entry = jin.getNextEntry();
}
/* Explicitly write out the META-INF/MANIFEST.MF so that any headers such
as the Class-Path are seen for the unpackaged jar
*/
Manifest mf = jin.getManifest();
if (mf != null) {
File file = new File(dest, "META-INF/MANIFEST.MF");//$NON-NLS-1$
File parent = file.getParentFile();
if (parent.exists() == false) {
parent.mkdirs();
}
OutputStream out = new FileOutputStream(file);
mf.write(out);
out.flush();
out.close();
}
jin.close();
}
//Used to Unzip the a specific folder packed inside a plug-in bundle to the plug-in state location
public static File extractFilesFromBundle( URL url, Bundle bundle, String path ) throws Exception {
URL jarUrl = UrlUtil.getJarFileUrl(url);
File jarFile = new File(jarUrl.getFile() );
Location configLocation = Platform.getConfigurationLocation();
String pluginId = bundle.getSymbolicName();
File configFolder = new File( configLocation.getURL().getFile(), pluginId);
File templDir = new File( configFolder, path );
if( !templDir.exists() ){
FileUtil.unjar( new FileInputStream( jarFile ), configFolder );
//Delete un-related files and folders
File[] files = configFolder.listFiles();
for( File f : files ){
if( f.isFile() )
f.delete();
else if( templDir.getPath().indexOf( f.getPath() ) !=0 ){
FileUtil.deleteFolder(f);
}
}
}
return templDir ;
}
}
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