org.microemu.app.util.IOUtils Maven / Gradle / Ivy
/*
* MicroEmulator
* Copyright (C) 2002 Bartek Teodorczyk
*
* It is licensed under the following two licenses as alternatives:
* 1. GNU Lesser General Public License (the "LGPL") version 2.1 or any newer version
* 2. Apache License (the "AL") Version 2.0
*
* You may not use this file except in compliance with at least one of
* the above two licenses.
*
* You may obtain a copy of the LGPL at
* http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
*
* You may obtain a copy of the AL 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 LGPL or the AL for the specific language governing permissions and
* limitations.
*/
package org.microemu.app.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.io.Writer;
/**
* General IO stream manipulation utilities.
* Some functions are based on org.apache.commons.io
*
*
* This class provides static utility methods for input/output operations.
*
* - closeQuietly - these methods close a stream ignoring nulls and exceptions
*
*
*/
public class IOUtils {
/**
* Solution for JVM bug
* http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6351751
*/
public static String getCanonicalFileURL(File file) {
String path = file.getAbsoluteFile().getPath();
if (File.separatorChar != '/') {
path = path.replace(File.separatorChar, '/');
}
// Not network path
if (!path.startsWith("//")) {
if (path.startsWith("/")) {
path = "//" + path;
} else {
path = "///" + path;
}
}
return "file:" + path;
}
public static String getCanonicalFileClassLoaderURL(File file) {
String url = getCanonicalFileURL(file);
if ((file.isDirectory()) && (!url.endsWith("/"))) {
url += "/";
}
return url;
}
public static void copyFile(File src, File dst) throws IOException {
FileInputStream fis = null;
try {
fis = new FileInputStream(src);
copyToFile(fis, dst);
} finally {
closeQuietly(fis);
}
}
public static void copyToFile(InputStream is, File dst) throws IOException {
FileOutputStream fos = null;
try {
fos = new FileOutputStream(dst);
byte[] buf = new byte[1024];
int i = 0;
while ((i = is.read(buf)) != -1) {
fos.write(buf, 0, i);
}
} finally {
closeQuietly(fos);
}
}
/**
* Unconditionally close an InputStream.
*
* Equivalent to {@link InputStream#close()}, except any exceptions will be ignored.
* This is typically used in finally blocks.
*
* @param input the InputStream to close, may be null or already closed
*/
public static void closeQuietly(InputStream input) {
try {
if (input != null) {
input.close();
}
} catch (IOException ignore) {
// ignore
}
}
/**
* Unconditionally close an OutputStream.
*
* Equivalent to {@link OutputStream#close()}, except any exceptions will be ignored.
* This is typically used in finally blocks.
*
* @param output the OutputStream to close, may be null or already closed
*/
public static void closeQuietly(OutputStream output) {
try {
if (output != null) {
output.close();
}
} catch (IOException ignore) {
// ignore
}
}
/**
* Unconditionally close a Writer.
*
* Equivalent to {@link Writer#close()}, except any exceptions will be ignored.
* This is typically used in finally blocks.
*
* @param output the Writer to close, may be null or already closed
*/
public static void closeQuietly(Writer output) {
try {
if (output != null) {
output.close();
}
} catch (IOException ioe) {
// ignore
}
}
}