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XLT (Xceptance LoadTest) is an extensive load and performance test tool developed and maintained by Xceptance.
/*
* Copyright (c) 2005-2022 Xceptance Software Technologies GmbH
*
* 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 com.xceptance.common.io;
import java.io.File;
import java.io.FileFilter;
import java.io.FilenameFilter;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.SystemUtils;
import org.apache.commons.vfs2.provider.local.LocalFile;
import org.apache.http.client.utils.URIBuilder;
import com.xceptance.common.lang.ReflectionUtils;
import com.xceptance.common.util.ParameterCheckUtils;
/**
* Convenience methods for the handling of files.
*
* @author René Schwietzke (Xceptance Software Technologies GmbH)
*/
public final class FileUtils
{
/**
* Error message indicating that a given directory is null.
*/
private static final String DIRECTORY_IS_NULL = "Directory is null.";
/**
* Error message indicating that a given abstract file is not a directory.
*/
private static final String NOT_A_DIRECTORY = "Not a directory: ";
/**
* Illegal characters, that must be escaped.
*/
private static final char[] CHARS_2B_ESCAPED =
{
'/', '\\', '<', '>', '|', '*', '?', ':', '"', ';', ',', '%', '#', '$'
};
/**
* Private constructor to prevent external instantiation.
*/
private FileUtils()
{
}
/**
* Copies the given file to the specified target file/directory. If the target is a file, it will be overwritten. If
* the target is a directory, a new file with the name of the source file will be created in this directory.
*
* @param source
* the source file
* @param target
* the target file/directory
* @throws java.io.IOException
* if an I/O error occurs
*/
public static void copyFile(final File source, final File target) throws IOException
{
// parameter check
if (source == null)
{
throw new IllegalArgumentException("Source file is null.");
}
if (target == null)
{
throw new IllegalArgumentException("Target file is null.");
}
if (!source.isFile())
{
throw new IllegalArgumentException("Not a valid file: " + source);
}
if (!target.isDirectory() && !target.isFile())
{
throw new IllegalArgumentException("Neither a file nor a directory: " + target);
}
// do the right thing
if (target.isDirectory())
{
// create a new file in the passed directory
org.apache.commons.io.FileUtils.copyFileToDirectory(source, target);
}
else
{
// copy the file
org.apache.commons.io.FileUtils.copyFile(source, target);
}
}
/**
* Copies the given directory to the specified target directory. If the contentOnly parameter is true, only the
* contents of the source directory are copied to the target directory. Otherwise the source directory itself
* including all contents is copied.
*
* @param sourceDir
* the source directory
* @param targetDir
* the target directory
* @param contentOnly
* whether to copy the source directory's content only
* @throws java.io.IOException
* if an I/O error occurs
*/
public static void copyDirectory(final File sourceDir, final File targetDir, final boolean contentOnly) throws IOException
{
// parameter check
if (sourceDir == null)
{
throw new IllegalArgumentException("Source directory is null.");
}
if (targetDir == null)
{
throw new IllegalArgumentException("Target directory is null.");
}
if (!sourceDir.isDirectory())
{
throw new IllegalArgumentException(NOT_A_DIRECTORY + sourceDir);
}
if (!targetDir.isDirectory())
{
throw new IllegalArgumentException(NOT_A_DIRECTORY + targetDir);
}
// if the directory itself is to be copied, create a new target
// directory
File toDir = targetDir;
if (!contentOnly)
{
toDir = new File(targetDir, sourceDir.getName());
org.apache.commons.io.FileUtils.forceMkdir(toDir);
}
// copy the source directory's content
final File[] files = listFiles(sourceDir, false);
for (final File file : files)
{
if (file.isFile())
{
copyFile(file, toDir);
}
else if (file.isDirectory())
{
// recursively copy any sub directory
copyDirectory(file, toDir, false);
}
}
}
/**
* Deletes all files/directories from the given directory. Be aware that directories are deleted recursively.
*
* @param directory
* the directory
* @throws java.io.IOException
* if an I/O error occurs
*/
public static void deleteFilesFromDirectory(final File directory) throws IOException
{
deleteFilesFromDirectory(directory, null);
}
/**
* Deletes those files/directories from the given directory that are accepted by the passed file filter. Be aware
* that a matching directory is deleted completely.
*
* @param directory
* the directory
* @param fileFilter
* the filter to select a sub set of files only, or null to select all files
* @throws java.io.IOException
* if an I/O error occurs
*/
public static void deleteFilesFromDirectory(final File directory, final FileFilter fileFilter) throws IOException
{
// parameter check
if (directory == null)
{
throw new IllegalArgumentException(DIRECTORY_IS_NULL);
}
if (!directory.isDirectory())
{
throw new IllegalArgumentException(NOT_A_DIRECTORY + directory);
}
// delete the files that match the filter
final File[] files = directory.listFiles(fileFilter);
if (files != null)
{
for (final File file : files)
{
// delete both ordinary files and directories
org.apache.commons.io.FileUtils.forceDelete(file);
}
}
}
/**
* Deletes the given file/directory. Be aware that a directory will be deleted recursively. This method throws an
* exception if the file/directory cannot be deleted. If the file/directory does not exist, no error will be
* reported.
*
* @param file
* the file/directory to delete
* @throws java.io.IOException
* if the file/directory could not be deleted
*/
public static void deleteFile(final File file) throws IOException
{
// parameter check
if (file == null)
{
throw new IllegalArgumentException("File is null.");
}
// check whether the specified file already exists
if (file.exists())
{
org.apache.commons.io.FileUtils.forceDelete(file);
}
}
/**
* Lists the contents of the given directory. If the 'recursively' flag is specified, the returned array will
* contain all files in all sub directories as well.
*
* @param directory
* the directory to list
* @param recursively
* whether to create a deep list
* @return an array of files
* @throws java.io.IOException
* if an I/O error occurs
*/
public static File[] listFiles(final File directory, final boolean recursively) throws IOException
{
return listFiles(directory, recursively, null);
}
/**
* Lists the contents of the given directory. The returned array will contain any file that is accepted by the
* specified file filter. If the 'recursively' flag is specified, any sub directory is searched as well.
*
* @param directory
* the directory to list
* @param recursively
* whether to search recursively
* @param filter
* the file filter to use
* @return an array of files
* @throws java.io.IOException
* if an I/O error occurs
*/
public static File[] listFiles(final File directory, final boolean recursively, final FilenameFilter filter) throws IOException
{
// parameter check
if (directory == null)
{
throw new IllegalArgumentException(DIRECTORY_IS_NULL);
}
if (!directory.isDirectory())
{
throw new IllegalArgumentException(NOT_A_DIRECTORY + directory);
}
//
if (recursively)
{
// get the matching files from this and any sub directory
final File[] files = directory.listFiles();
final ArrayList result = new ArrayList();
if (files != null)
{
for (final File file : files)
{
if (filter == null || filter.accept(directory, file.getName()))
{
result.add(file);
}
if (file.isDirectory())
{
final File[] subDirFiles = listFiles(file, recursively, filter);
result.addAll(new ArrayList(Arrays.asList(subDirFiles)));
}
}
}
return result.toArray(new File[result.size()]);
}
else
{
// get the files from this directory only
final File[] files = directory.listFiles(filter);
if (files == null)
{
throw new IOException("Failed to list directory: " + directory);
}
return files;
}
}
/**
* Replaces any illegal character in the given file name with an underscore.
*
* @param fileName
* the file name
* @return the file name with illegal characters replaced
*/
public static String replaceIllegalCharsInFileName(final String fileName)
{
ParameterCheckUtils.isNotNull(fileName, "fileName");
final char[] chars = fileName.toCharArray();
for (int i = 0; i < chars.length; i++)
{
for (final char illegalChar : CHARS_2B_ESCAPED)
{
if (chars[i] == illegalChar)
{
chars[i] = '_';
}
}
}
return new String(chars);
}
/**
* Converts any illegal character in the given file name to its "%xx" equivalent.
*
* @param fileName
* the file name
* @return the file name with illegal characters converted
*/
public static String convertIllegalCharsInFileName(final String fileName)
{
ParameterCheckUtils.isNotNull(fileName, "fileName");
final int offset = 10;
final StringBuilder converted = new StringBuilder(fileName.length() + offset);
for (final char c : fileName.toCharArray())
{
converted.append(convertCharacter(c));
}
return converted.toString();
}
/**
* Converts the given character.
*
* @param c
* character to be converted
* @return converted character
*/
private static String convertCharacter(final char c)
{
final int bitMask = 0xff;
for (final char illegalChar : CHARS_2B_ESCAPED)
{
if (c == illegalChar)
{
return String.format("$%02x", (c % bitMask));
}
}
return Character.toString(c);
}
/**
* deletes a directory
* All contained files will be removed. Unremovable directories are tolerated as long as they don't contain any
* file.
*
* @param file
* file or directory to remove
* @return true if file/directory was removed successfully
* @throws IOException
* if a file was not removable
* @throws IllegalArgumentException
* if file argument is null
*/
public static boolean deleteDirectoryRelaxed(final File file) throws IOException, IllegalArgumentException
{
if (file == null)
{
throw new IllegalArgumentException("File must not be null.");
}
return deleteDirectoryRelaxed(file, false);
}
/**
* clears a directory without deleting it.
* All contained files and directories will be removed. Unremovable directories are tolerated as long as they don't
* contain any file.
*
* @param dir
* directory to remove
* @return true if directory was cleared successfully
* @throws IOException
* if a file was not removable
* @throws IllegalArgumentException
* if file argument is null or parameter value doesn't point to a directory
*/
public static boolean cleanDirRelaxed(final File dir) throws IOException, IllegalArgumentException
{
if (dir == null)
{
throw new IllegalArgumentException("File must not be null.");
}
if (dir.isFile())
{
throw new IllegalArgumentException("File must be a directory.");
}
return deleteDirectoryRelaxed(dir, true);
}
/**
* @param file
* file or directory to remove
* @param clearOnly
* if set and the given file parameter points to a directory, this directory will not get removed (just
* cleared)
* @return true if file/directory was removed successfully
* @throws IOException
* if a file was not removable
*/
private static boolean deleteDirectoryRelaxed(final File file, final boolean clearOnly) throws IOException
{
boolean isRemoved = false;
if (!file.exists())
{
isRemoved = true;
}
else
{
// directory
if (file.isDirectory())
{
// directory is clear
boolean isClear = true;
// get directory content
final File[] childs = file.listFiles();
// directory has content
if (childs != null)
{
for (final File child : childs)
{
// delete directory child (may be dir or file)
if (!deleteDirectoryRelaxed(child, false))
{
// remember if failed
isClear = false;
}
}
}
// if directory is clear, delete it
if (isClear)
{
isRemoved = true;
if (!clearOnly)
{
isRemoved = file.delete();
}
}
}
else
// file
{
// try to delete
if (!file.delete())
{
throw new IOException("unable to delete file " + file.getAbsolutePath());
}
// if no exception is thrown, the file was removed successfully
isRemoved = true;
}
}
return isRemoved;
}
/**
* Computes the URI from the source to the target file.
*
* Returns relative URIs if possible. However returns absolute URIs for files on different drives under Microsoft
* Windows. Returned URIs never have a trailing "/". You have to tell whether the source file represents a
* directory. This is due to the case where the source file has not been created currently in which case it is not
* possible to determine if the given source is regular file or a directory.
*
*
* Absolute URIs are returned with a leading "file://"!
*
*
* Please notice, that the current working directory may be used to make relative files absolute.
*
*
* @param source
* the file where the URI goes from
* @param target
* the file where the URI goes to
* @param sourceIsDirectory
* indicating whether the argument source denotes a directory instead of a file
* @return the relative URI from the source file to the target file if possible, the absolute URI otherwise
*/
public static String computeRelativeUri(final File source, final File target, final boolean sourceIsDirectory)
{
if (source.equals(target))
{
return sourceIsDirectory ? "." : "./" + source.getName();
}
final String[] sourcePathParts = StringUtils.split(getCanonicalPath(source), File.separatorChar);
final String[] targetPathParts = StringUtils.split(getCanonicalPath(target), File.separatorChar);
int noCommonPathParts = 0;
final int noParts = Math.min(targetPathParts.length, sourcePathParts.length);
for (int i = 0; i < noParts; i++)
{
final File t = new File(targetPathParts[i]), s = new File(sourcePathParts[i]);
/* We use file object to deal correctly with case sensitive / insensitive paths/ file names. */
if (!t.equals(s))
{
noCommonPathParts = i;
break;
}
}
final StringBuilder pathBuilder = new StringBuilder(1024);
if (noCommonPathParts == 0 && SystemUtils.IS_OS_WINDOWS)
{
pathBuilder.append("file:///");
pathBuilder.append(StringUtils.join(targetPathParts, "/"));
}
else
{
final int noLevelsToSource = sourcePathParts.length - noCommonPathParts - (sourceIsDirectory ? 0 : 1);
if (noLevelsToSource > 0)
{
pathBuilder.append(StringUtils.repeat("../", noLevelsToSource));
}
pathBuilder.append(StringUtils.join(targetPathParts, "/", noCommonPathParts, targetPathParts.length));
}
return pathBuilder.toString();
}
/**
* Get the canonical path for the given File. {@link IOException} and {@link SecurityException} that might occur
* during canonical path construction result in a {@link RuntimeException}.
*
* @param f
* File to get the canonical path from.
* @return The canonical Path of the given file
*/
private static String getCanonicalPath(final File f)
{
try
{
return f.getCanonicalPath();
}
catch (final IOException e)
{
throw new RuntimeException("Failed to resolve canonical path for file '" + f.getAbsolutePath() + "': " + e.getMessage());
}
catch (final SecurityException e)
{
throw new RuntimeException("Failed to resolve canonical path for file '" + f.getAbsolutePath() + "': " + e.getMessage());
}
}
/**
* Converts a VFS {@link LocalFile} object to its corresponding {@link File} object.
*
* @param localFile
* the {@link LocalFile} object
* @return the corresponding {@link File} object
*/
public static File convertLocalFileToFile(final LocalFile localFile)
{
final File f = (File) ReflectionUtils.callMethod(LocalFile.class, localFile, "getLocalFile");
try
{
return f.getCanonicalFile();
}
catch (final IOException e)
{
throw new RuntimeException("Failed to convert: " + localFile.getName().getPath(), e);
}
}
/**
* @return the number of ancestors of the argument file in the file hierarchy up to the top most level
*/
public static int getNumberOfAncestors(final File file)
{
// parameter check
if (file == null)
{
throw new IllegalArgumentException("File must not be null.");
}
int returnValue = 0;
File current = file;
while (current.getParentFile() != null)
{
current = current.getParentFile();
returnValue++;
}
return returnValue;
}
/**
* @return the ancestors of the argument file in the file hierarchy with the argument number of top most ancestors
* skipped in hierarchical order
*/
public static List getParents(final File file, final int ancestorsToSkip)
{
// parameter check
if (file == null)
{
throw new IllegalArgumentException("File must not be null.");
}
final List returnValue = new ArrayList();
File current = file;
while (current.getParentFile() != null)
{
current = current.getParentFile();
returnValue.add(0, current);
}
return returnValue.subList(ancestorsToSkip, returnValue.size());
}
/**
* Returns the current user's working directory.
*
* @return
*/
public static String getCurrentWorkingDirectory()
{
return System.getProperty("user.dir");
}
/**
* Converts the given file to its corresponding file URI. In contrast to {@link File#toURI()}, an empty host name
* will be set, so the resulting file URI will have always three leading slashes ( file:///path)
* instead of one (file:/path).
*
* @param file
* the input file
* @return the corresponding file URI
*/
public static URI toUri(final File file)
{
// parameter check
ParameterCheckUtils.isNotNull(file, "file");
try
{
return new URIBuilder(file.toURI()).setHost("").build();
}
catch (final URISyntaxException e)
{
// should never happen
throw new IllegalArgumentException("Failed to build URI from file: " + file, e);
}
}
}