FileUtils.java

/**
 *  OpenKM, Open Document Management System (http://www.openkm.com)
 *  Copyright (c) 2006-2011  Paco Avila & Josep Llort
 *
 *  No bytes were intentionally harmed during the development of this application.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *  
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

package com.openkm.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 org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.openkm.core.DatabaseException;
import com.openkm.dao.MimeTypeDAO;
import com.openkm.dao.bean.MimeType;

public class FileUtils {
	private static Logger log = LoggerFactory.getLogger(FileUtils.class);
	
	/**
	 * Returns the name of the file whithout the extension.
	 */
	public static String getFileName(String file) {
		log.debug("getFileName({})", file);
		int idx = file.lastIndexOf(".");
		String ret = idx>=0?file.substring(0, idx):file;
		log.debug("getFileName: {}", ret);
		return ret;
	}
	
	/**
	 * Returns the filename extension.
	 */
	public static String getFileExtension(String file) {
		log.debug("getFileExtension({})", file);
		int idx = file.lastIndexOf(".");
		String ret = idx>=0?file.substring(idx+1):"";
		log.debug("getFileExtension: {}", ret);
		return ret;
	}
	
	/**
	 * Creates a temporal and unique directory
	 * 
	 * @throws IOException If something fails.
	 */
	public static File createTempDir() throws IOException {
		File tmpFile = File.createTempFile("okm", null);
		
		if (!tmpFile.delete())
			throw new IOException();
		if (!tmpFile.mkdir())
			throw new IOException();
		return tmpFile;       
	}
	
	/**
	 * Create temp file with extension from mime
	 */
	public static File createTempFileFromMime(String mimeType) throws DatabaseException, IOException {
		MimeType mt = MimeTypeDAO.findByName(mimeType);
		String ext = mt.getExtensions().iterator().next();
		return File.createTempFile("okm", "."+ext);
	}
	
	/**
	 * Wrapper for FileUtils.deleteQuietly
	 */
	public static boolean deleteQuietly(File file) {
		return org.apache.commons.io.FileUtils.deleteQuietly(file);
	}
	
	/**
	 * Count files and directories from a selected directory.
	 */
	public static int countFiles(File dir) {
		File[] found = dir.listFiles();
		int ret = 0;
		
		if (found != null) {
			for (int i = 0; i < found.length; i++) {
				if (found[i].isDirectory()) {
					ret += countFiles(found[i]);
				}
				
				ret++;
			}
		}
		
		return ret;
	}
	
	/**
	 * Copy InputStream to File.
	 */
	public static void copy(InputStream input, File output) throws IOException {
		FileOutputStream fos = new FileOutputStream(output);
		IOUtils.copy(input, fos);
		fos.flush();
		fos.close();
	}
	
	/**
	 * Copy File to OutputStream
	 */
	public static void copy(File input, OutputStream output) throws IOException {
		FileInputStream fis = new FileInputStream(input);
		IOUtils.copy(fis, output);
		fis.close();
	}
	
	/**
	 * Copy File to File
	 */
	public static void copy(File input, File output) throws IOException {
		org.apache.commons.io.FileUtils.copyFile(input, output);
	}
}