/*
* Copyright (c) 2003-2011, Simon Brown
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* - Neither the name of Pebble nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package net.sourceforge.pebble.util;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.io.*;
import java.net.FileNameMap;
import java.net.URLConnection;
import java.nio.channels.FileChannel;
import java.util.Properties;
/**
* A collection of utility methods for manipulating files.
*
* @author Simon Brown
*/
public final class FileUtils {
/** the logger used by this class */
private static final Log log = LogFactory.getLog(FileUtils.class);
/** the local content type map */
private static Properties localFileNameMap;
static {
try {
localFileNameMap = new Properties();
InputStream in = FileUtils.class.getClassLoader().getResourceAsStream("content-types.properties");
if (in != null) {
localFileNameMap.load(in);
in.close();
}
} catch (IOException ioe) {
log.error("Could not load content types.", ioe);
}
}
/**
* Determines whether a given file is underneath a given root.
*
* @param root the root directory
* @param file the file to test
* @return true if the file is underneath the root,
* false otherwise or if this can not be determined because
* of security constraints in place
*/
public static boolean underneathRoot(File root, File file) {
try {
// first of all, find the root directory for this type of file
root = root.getCanonicalFile();
file = file.getCanonicalFile();
while (file != null) {
if (file.equals(root)) {
return true;
} else {
file = file.getParentFile();
}
}
} catch (IOException ioe) {
return false;
}
return false;
}
/**
* Deletes a file, including all files and sub-directories if the
* specified file is a directory.
*
* @param directory a File instance representing the directory to delete
*/
public static void deleteFile(File directory) {
File files[] = directory.listFiles();
if (files != null) {
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) {
deleteFile(files[i]);
} else {
files[i].delete();
}
}
}
directory.delete();
}
/**
* Copies a file.
*
* @param source the source File
* @param destination the destination File
*/
public static void copyFile(File source, File destination) throws IOException {
FileChannel srcChannel = new FileInputStream(source).getChannel();
FileChannel dstChannel = new FileOutputStream(destination).getChannel();
dstChannel.transferFrom(srcChannel, 0, srcChannel.size());
srcChannel.close();
dstChannel.close();
}
/**
* Gets the content type for the specified filename.
*
* @param name the name of a file
* @return a MIME type, or application/octet-stream if one can't be found
*/
public static String getContentType(String name) {
String contentType;
FileNameMap fileNameMap = URLConnection.getFileNameMap();
contentType = fileNameMap.getContentTypeFor(name);
if (contentType == null) {
int index = name.lastIndexOf(".");
if (index > -1) {
contentType = localFileNameMap.getProperty(name.substring(index));
}
}
return contentType;
}
}