io.vertigo.dynamo.file.util.FileUtil Maven / Gradle / Ivy
/**
* vertigo - simple java starter
*
* Copyright (C) 2013, KleeGroup, [email protected] (http://www.kleegroup.com)
* KleeGroup, Centre d'affaire la Boursidiere - BP 159 - 92357 Le Plessis Robinson Cedex - France
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.vertigo.dynamo.file.util;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* Utilitaire de gestion des fichiers et flux associés.
*
* @author npiedeloup
*/
public final class FileUtil {
private static final String USER_HOME = "user.home";
private static final String USER_DIR = "user.dir";
private static final String JAVA_IO_TMPDIR = "java.io.tmpdir";
/**
* Constructeur privé pour classe utilitaire
*/
private FileUtil() {
//rien
}
/**
* Copie le contenu d'un flux d'entrée vers un flux de sortie.
* @param in flux d'entrée
* @param out flux de sortie
* @throws IOException Erreur d'entrée/sortie
*/
public static void copy(final InputStream in, final OutputStream out) throws IOException {
final int bufferSize = 10 * 1024;
final byte[] bytes = new byte[bufferSize];
int read = in.read(bytes);
while (read != -1) {
out.write(bytes, 0, read);
read = in.read(bytes);
}
}
/**
* Copie le contenu d'un flux d'entrée vers un fichier de sortie.
* @param in flux d'entrée
* @param file fichier de sortie
* @throws IOException Erreur d'entrée/sortie
*/
public static void copy(final InputStream in, final File file) throws IOException {
try (final OutputStream out = new BufferedOutputStream(new FileOutputStream(file))) {
FileUtil.copy(in, out);
}
}
/**
* Donne l'extension du fichier.
*
* This method returns the textual part of the filename after the last dot.
* There must be no directory separator after the dot.
*
* foo.txt --> "txt"
* a/b/c.jpg --> "jpg"
* a/b.txt/c --> ""
* a/b/c --> ""
*
*
* The output will be the same irrespective of the machine that the code is running on.
* @param fileName Nom du fichier
*
* @return the extension of the file or an empty string if none exists.
* (author Apache Commons IO 1.1)
*/
public static String getFileExtension(final String fileName) {
final String extension;
// The extension separator character.
final char extensionSeparator = '.';
// The Unix separator character.
final char unixSeparator = '/';
// The Windows separator character.
final char windowsSeparator = '\\';
final int extensionPos = fileName.lastIndexOf(extensionSeparator);
final int lastUnixPos = fileName.lastIndexOf(unixSeparator);
final int lastWindowsPos = fileName.lastIndexOf(windowsSeparator);
final int lastSeparator = Math.max(lastUnixPos, lastWindowsPos);
final int index = lastSeparator > extensionPos ? -1 : extensionPos;
if (index == -1) {
extension = "";
// null dans la version cvs précédente
} else {
extension = fileName.substring(index + 1).toLowerCase();
}
return extension;
}
/**
* Replace "user.home" "user.dir" and "java.io.tmpdir" by system value.
* @param path PAth to translate
* @return translated path
*/
public static String translatePath(final String path) {
return path
.replaceAll(USER_HOME, System.getProperty(USER_HOME).replace('\\', '/'))
.replaceAll(USER_DIR, System.getProperty(USER_DIR).replace('\\', '/'))
.replaceAll(JAVA_IO_TMPDIR, System.getProperty(JAVA_IO_TMPDIR).replace('\\', '/'));
}
}