// *************************************************************************************************************************** | |
// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file * | |
// * distributed with this work for additional information regarding copyright ownership. The ASF licenses this file * | |
// * to you 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 org.apache.juneau.internal; | |
import static org.apache.juneau.internal.ThrowableUtils.*; | |
import java.io.*; | |
import java.nio.file.*; | |
import org.apache.juneau.*; | |
/** | |
* File utilities. | |
*/ | |
public class FileUtils { | |
/** | |
* Same as {@link File#mkdirs()} except throws a RuntimeExeption if directory could not be created. | |
* | |
* @param f The directory to create. Must not be <jk>null</jk>. | |
* @param clean If <jk>true</jk>, deletes the contents of the directory if it already exists. | |
* @return The same file. | |
* @throws RuntimeException if directory could not be created. | |
*/ | |
public static File mkdirs(File f, boolean clean) { | |
assertFieldNotNull(f, "f"); | |
if (f.exists()) { | |
if (clean) { | |
if (! delete(f)) | |
throw new FormattedRuntimeException("Could not clean directory ''{0}''", f.getAbsolutePath()); | |
} else { | |
return f; | |
} | |
} | |
if (! f.mkdirs()) | |
throw new FormattedRuntimeException("Could not create directory ''{0}''", f.getAbsolutePath()); | |
return f; | |
} | |
/** | |
* Same as {@link #mkdirs(String, boolean)} but uses String path. | |
* | |
* @param path The path of the directory to create. Must not be <jk>null</jk> | |
* @param clean If <jk>true</jk>, deletes the contents of the directory if it already exists. | |
* @return The directory. | |
*/ | |
public static File mkdirs(String path, boolean clean) { | |
assertFieldNotNull(path, "path"); | |
return mkdirs(new File(path), clean); | |
} | |
/** | |
* Recursively deletes a file or directory. | |
* | |
* @param f The file or directory to delete. | |
* @return <jk>true</jk> if file or directory was successfully deleted. | |
*/ | |
public static boolean delete(File f) { | |
if (f == null) | |
return true; | |
if (f.isDirectory()) { | |
File[] cf = f.listFiles(); | |
if (cf != null) | |
for (File c : cf) | |
delete(c); | |
} | |
return f.delete(); | |
} | |
/** | |
* Creates a file if it doesn't already exist using {@link File#createNewFile()}. | |
* | |
* <p> | |
* Throws a {@link RuntimeException} if the file could not be created. | |
* | |
* @param f The file to create. | |
*/ | |
public static void create(File f) { | |
if (f.exists()) | |
return; | |
try { | |
if (! f.createNewFile()) | |
throw new FormattedRuntimeException("Could not create file ''{0}''", f.getAbsolutePath()); | |
} catch (IOException e) { | |
throw new RuntimeException(e); | |
} | |
} | |
/** | |
* Updates the modified timestamp on the specified file. | |
* | |
* <p> | |
* Method ensures that the timestamp changes even if it's been modified within the past millisecond. | |
* | |
* @param f The file to modify the modified timestamp on. | |
*/ | |
public static void modifyTimestamp(File f) { | |
long lm = f.lastModified(); | |
long l = System.currentTimeMillis(); | |
if (lm == l) | |
l++; | |
if (! f.setLastModified(l)) | |
throw new FormattedRuntimeException("Could not modify timestamp on file ''{0}''", f.getAbsolutePath()); | |
// Linux only gives 1s precision, so set the date 1s into the future. | |
if (lm == f.lastModified()) { | |
l += 1000; | |
if (! f.setLastModified(l)) | |
throw new FormattedRuntimeException("Could not modify timestamp on file ''{0}''", f.getAbsolutePath()); | |
} | |
} | |
/** | |
* Create a temporary file with the specified name. | |
* | |
* <p> | |
* The name is broken into file name and suffix, and the parts are passed to | |
* {@link File#createTempFile(String, String)}. | |
* | |
* <p> | |
* {@link File#deleteOnExit()} is called on the resulting file before being returned by this method. | |
* | |
* @param name The file name | |
* @return A newly-created temporary file. | |
* @throws IOException Thrown by underlying stream. | |
*/ | |
public static File createTempFile(String name) throws IOException { | |
String[] parts = name.split("\\."); | |
File f = File.createTempFile(parts[0], "." + parts[1]); | |
f.deleteOnExit(); | |
return f; | |
} | |
/** | |
* Strips the extension from a file name. | |
* | |
* @param name The file name. | |
* @return The file name without the extension, or <jk>null</jk> if name was <jk>null</jk>. | |
*/ | |
public static String getBaseName(String name) { | |
if (name == null) | |
return null; | |
int i = name.lastIndexOf('.'); | |
if (i == -1) | |
return name; | |
return name.substring(0, i); | |
} | |
/** | |
* Returns the extension from a file name. | |
* | |
* @param name The file name. | |
* @return The the extension, or <jk>null</jk> if name was <jk>null</jk>. | |
*/ | |
public static String getExtension(String name) { | |
if (name == null) | |
return null; | |
int i = name.lastIndexOf('.'); | |
if (i == -1) | |
return ""; | |
return name.substring(i+1); | |
} | |
/** | |
* Returns <jk>true</jk> if the specified file exists in the specified directory. | |
* | |
* @param dir The directory. | |
* @param fileName The file name. | |
* @return <jk>true</jk> if the specified file exists in the specified directory. | |
*/ | |
public static boolean exists(File dir, String fileName) { | |
if (dir == null || fileName == null) | |
return false; | |
return Files.exists(dir.toPath().resolve(fileName)); | |
} | |
/** | |
* Returns <jk>true</jk> if the specified file name contains the specified extension. | |
* | |
* @param name The file name. | |
* @param ext The extension. | |
* @return <jk>true</jk> if the specified file name contains the specified extension. | |
*/ | |
public static boolean hasExtension(String name, String ext) { | |
if (name == null || ext == null) | |
return false; | |
return ext.equals(getExtension(name)); | |
} | |
} |