org.apache.tools.ant.util

Class FileUtils

java.lang.Object

org.apache.tools.ant.util.FileUtils

public class FileUtils
extends Object

This class also encapsulates methods which allow Files to be referred to using abstract path names which are translated to native system file paths at runtime as well as copying files or setting their last modification time.

Field Summary

Fields

Modifier and Type	Field and Description
static long	FAT_FILE_TIMESTAMP_GRANULARITY The granularity of timestamps under FAT.
static long	NTFS_FILE_TIMESTAMP_GRANULARITY The granularity of timestamps under the NT File System.
static long	UNIX_FILE_TIMESTAMP_GRANULARITY The granularity of timestamps under Unix.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	FileUtils() Empty constructor.

Method Summary

Modifier and Type	Method and Description
boolean	areSame(File f1, File f2) Are the two File instances pointing to the same object on the file system?
static void	close(java.nio.channels.Channel device) Close a Channel without throwing any exception if something went wrong.
static void	close(InputStream device) Close a stream without throwing any exception if something went wrong.
static void	close(OutputStream device) Close a stream without throwing any exception if something went wrong.
static void	close(Reader device) Close a Reader without throwing any exception if something went wrong.
static void	close(URLConnection conn) Closes an URLConnection if its concrete implementation provides a way to close it that Ant knows of.
static void	close(Writer device) Close a Writer without throwing any exception if something went wrong.
boolean	contentEquals(File f1, File f2) Compares the contents of two files.
boolean	contentEquals(File f1, File f2, boolean textfile) Compares the contents of two files.
void	copyFile(File sourceFile, File destFile) Convenience method to copy a file from a source to a destination.
void	copyFile(File sourceFile, File destFile, FilterSetCollection filters) Convenience method to copy a file from a source to a destination specifying if token filtering must be used.
void	copyFile(File sourceFile, File destFile, FilterSetCollection filters, boolean overwrite) Convenience method to copy a file from a source to a destination specifying if token filtering must be used and if source files may overwrite newer destination files.
void	copyFile(File sourceFile, File destFile, FilterSetCollection filters, boolean overwrite, boolean preserveLastModified) Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.
void	copyFile(File sourceFile, File destFile, FilterSetCollection filters, boolean overwrite, boolean preserveLastModified, String encoding) Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if source files may overwrite newer destination files, the last modified time of destFile file should be made equal to the last modified time of sourceFile and which character encoding to assume.
void	copyFile(File sourceFile, File destFile, FilterSetCollection filters, Vector filterChains, boolean overwrite, boolean preserveLastModified, boolean append, String inputEncoding, String outputEncoding, Project project) Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if filter chains must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.
void	copyFile(File sourceFile, File destFile, FilterSetCollection filters, Vector filterChains, boolean overwrite, boolean preserveLastModified, boolean append, String inputEncoding, String outputEncoding, Project project, boolean force) Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if filter chains must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.
void	copyFile(File sourceFile, File destFile, FilterSetCollection filters, Vector filterChains, boolean overwrite, boolean preserveLastModified, String encoding, Project project) Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if filter chains must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.
void	copyFile(File sourceFile, File destFile, FilterSetCollection filters, Vector filterChains, boolean overwrite, boolean preserveLastModified, String inputEncoding, String outputEncoding, Project project) Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if filter chains must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.
void	copyFile(String sourceFile, String destFile) Convenience method to copy a file from a source to a destination.
void	copyFile(String sourceFile, String destFile, FilterSetCollection filters) Convenience method to copy a file from a source to a destination specifying if token filtering must be used.
void	copyFile(String sourceFile, String destFile, FilterSetCollection filters, boolean overwrite) Convenience method to copy a file from a source to a destination specifying if token filtering must be used and if source files may overwrite newer destination files.
void	copyFile(String sourceFile, String destFile, FilterSetCollection filters, boolean overwrite, boolean preserveLastModified) Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.
void	copyFile(String sourceFile, String destFile, FilterSetCollection filters, boolean overwrite, boolean preserveLastModified, String encoding) Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.
void	copyFile(String sourceFile, String destFile, FilterSetCollection filters, Vector filterChains, boolean overwrite, boolean preserveLastModified, String encoding, Project project) Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if filter chains must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.
void	copyFile(String sourceFile, String destFile, FilterSetCollection filters, Vector filterChains, boolean overwrite, boolean preserveLastModified, String inputEncoding, String outputEncoding, Project project) Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if filter chains must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.
boolean	createNewFile(File f) This was originally an emulation of File.createNewFile for JDK 1.1, but it is now implemented using that method (Ant 1.6.3 onwards).
boolean	createNewFile(File f, boolean mkdirs) Create a new file, optionally creating parent directories.
File	createTempFile(String prefix, String suffix, File parentDir, boolean deleteOnExit, boolean createFile) Create a temporary file in a given directory.
static void	delete(File file) Delete the file with File.delete() if the argument is not null.
String[]	dissect(String path) Dissect the specified absolute path.
boolean	fileNameEquals(File f1, File f2) Compares two filenames.
String	fromURI(String uri) Constructs a file path from a file: URI.
String	getDefaultEncoding() Get the default encoding.
long	getFileTimestampGranularity() Get the granularity of file timestamps.
URL	getFileURL(File file) Get the URL for a file taking into account # characters.
static FileUtils	getFileUtils() Method to retrieve The FileUtils, which is shared by all users of this method.
static String	getPath(List pathStack) Gets path from a List of Strings.
static String	getPath(List pathStack, char separatorChar) Gets path from a List of Strings.
static String[]	getPathStack(String path) Gets all names of the path as an array of Strings.
static String	getRelativePath(File fromFile, File toFile) Calculates the relative path between two files.
boolean	hasErrorInCase(File localFile) test whether a file or directory exists, with an error in the upper/lower case spelling of the name.
static boolean	isAbsolutePath(String filename) Verifies that the specified filename represents an absolute path.
static boolean	isContextRelativePath(String filename) On DOS and NetWare, the evaluation of certain file specifications is context-dependent.
boolean	isLeadingPath(File leading, File path) Learn whether one path "leads" another.
boolean	isUpToDate(File source, File dest) Returns true if the source is older than the dest.
boolean	isUpToDate(File source, File dest, long granularity) Returns true if the source is older than the dest.
boolean	isUpToDate(long sourceTime, long destTime) Compare two timestamps for being up to date using the current granularity.
boolean	isUpToDate(long sourceTime, long destTime, long granularity) Compare two timestamps for being up to date using the specified granularity.
File	normalize(String path) "Normalize" the given absolute path.
static String	readFully(Reader rdr) Read from reader till EOF.
static String	readFully(Reader rdr, int bufferSize) Read from reader till EOF.
String	removeLeadingPath(File leading, File path) Removes a leading path from a second path.
void	rename(File from, File to) Renames a file, even if that involves crossing file system boundaries.
File	resolveFile(File file, String filename) Interpret the filename as a file relative to the given file unless the filename already represents an absolute filename.
static String	safeReadFully(Reader reader) Safe read fully - do not return a null for an empty reader.
void	setFileLastModified(File file, long time) Calls File.setLastModified(long time).
String	toURI(String path) Constructs a file: URI that represents the external form of the given pathname.
String	toVMSPath(File f) Returns a VMS String representation of a File object.
static String	translatePath(String toProcess) Translate a path into its native (platform specific) format.
boolean	tryHardToDelete(File f) Accommodate Windows bug encountered in both Sun and IBM JDKs.
boolean	tryHardToDelete(File f, boolean runGC) If delete does not work, call System.gc() if asked to, wait a little and try again.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

FAT_FILE_TIMESTAMP_GRANULARITY

public static final long FAT_FILE_TIMESTAMP_GRANULARITY

The granularity of timestamps under FAT.

See Also:

Constant Field Values

NTFS_FILE_TIMESTAMP_GRANULARITY

public static final long NTFS_FILE_TIMESTAMP_GRANULARITY

The granularity of timestamps under the NT File System. NTFS has a granularity of 100 nanoseconds, which is less than 1 millisecond, so we round this up to 1 millisecond.

See Also:

Constant Field Values

UNIX_FILE_TIMESTAMP_GRANULARITY

public static final long UNIX_FILE_TIMESTAMP_GRANULARITY

The granularity of timestamps under Unix.

See Also:

Constant Field Values

Constructor Detail

FileUtils

protected FileUtils()

Empty constructor.

Method Detail

areSame

public boolean areSame(File f1,
                       File f2)
                throws IOException

Are the two File instances pointing to the same object on the file system?

Throws:

IOException

Since:

Ant 1.8.2

close

public static void close(java.nio.channels.Channel device)

Close a Channel without throwing any exception if something went wrong. Do not attempt to close it if the argument is null.

Parameters:

device - channel, can be null.

Since:

Ant 1.8.0

close

public static void close(InputStream device)

Close a stream without throwing any exception if something went wrong. Do not attempt to close it if the argument is null.

Parameters:

device - stream, can be null.

close

public static void close(OutputStream device)

Close a stream without throwing any exception if something went wrong. Do not attempt to close it if the argument is null.

Parameters:

device - stream, can be null.

close

public static void close(Reader device)

Close a Reader without throwing any exception if something went wrong. Do not attempt to close it if the argument is null.

Parameters:

device - Reader, can be null.

close

public static void close(URLConnection conn)

Closes an URLConnection if its concrete implementation provides a way to close it that Ant knows of.

Parameters:

conn - connection, can be null

Since:

Ant 1.8.0

close

public static void close(Writer device)

Close a Writer without throwing any exception if something went wrong. Do not attempt to close it if the argument is null.

Parameters:

device - output writer, can be null.

contentEquals

public boolean contentEquals(File f1,
                             File f2)
                      throws IOException

Compares the contents of two files.

Parameters:

f1 - the file whose content is to be compared.

f2 - the other file whose content is to be compared.

Returns:

true if the content of the files is the same.

Throws:

IOException - if the files cannot be read.

contentEquals

public boolean contentEquals(File f1,
                             File f2,
                             boolean textfile)
                      throws IOException

Compares the contents of two files.

Parameters:

f1 - the file whose content is to be compared.

f2 - the other file whose content is to be compared.

textfile - true if the file is to be treated as a text file and differences in kind of line break are to be ignored.

Returns:

true if the content of the files is the same.

Throws:

IOException - if the files cannot be read.

Since:

Ant 1.6.3

copyFile

public void copyFile(File sourceFile,
                     File destFile)
              throws IOException

Convenience method to copy a file from a source to a destination. No filtering is performed.

Parameters:

sourceFile - the file to copy from. Must not be null.

destFile - the file to copy to. Must not be null.

Throws:

IOException - if the copying fails.

copyFile

public void copyFile(File sourceFile,
                     File destFile,
                     FilterSetCollection filters)
              throws IOException

Convenience method to copy a file from a source to a destination specifying if token filtering must be used.

Parameters:

sourceFile - the file to copy from. Must not be null.

destFile - the file to copy to. Must not be null.

filters - the collection of filters to apply to this copy.

Throws:

IOException - if the copying fails.

copyFile

public void copyFile(File sourceFile,
                     File destFile,
                     FilterSetCollection filters,
                     boolean overwrite)
              throws IOException

Convenience method to copy a file from a source to a destination specifying if token filtering must be used and if source files may overwrite newer destination files.

Parameters:

sourceFile - the file to copy from. Must not be null.

destFile - the file to copy to. Must not be null.

filters - the collection of filters to apply to this copy.

overwrite - Whether or not the destination file should be overwritten if it already exists.

Throws:

IOException - if the copying fails.

copyFile

public void copyFile(File sourceFile,
                     File destFile,
                     FilterSetCollection filters,
                     boolean overwrite,
                     boolean preserveLastModified)
              throws IOException

Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.

Parameters:

sourceFile - the file to copy from. Must not be null.

destFile - the file to copy to. Must not be null.

filters - the collection of filters to apply to this copy.

overwrite - Whether or not the destination file should be overwritten if it already exists.

preserveLastModified - Whether or not the last modified time of the resulting file should be set to that of the source file.

Throws:

IOException - if the copying fails.

copyFile

public void copyFile(File sourceFile,
                     File destFile,
                     FilterSetCollection filters,
                     boolean overwrite,
                     boolean preserveLastModified,
                     String encoding)
              throws IOException

Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if source files may overwrite newer destination files, the last modified time of destFile file should be made equal to the last modified time of sourceFile and which character encoding to assume.

Parameters:

sourceFile - the file to copy from. Must not be null.

destFile - the file to copy to. Must not be null.

filters - the collection of filters to apply to this copy.

overwrite - Whether or not the destination file should be overwritten if it already exists.

preserveLastModified - Whether or not the last modified time of the resulting file should be set to that of the source file.

encoding - the encoding used to read and write the files.

Throws:

IOException - if the copying fails.

Since:

Ant 1.5

copyFile

public void copyFile(File sourceFile,
                     File destFile,
                     FilterSetCollection filters,
                     Vector filterChains,
                     boolean overwrite,
                     boolean preserveLastModified,
                     boolean append,
                     String inputEncoding,
                     String outputEncoding,
                     Project project)
              throws IOException

Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if filter chains must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.

Parameters:

sourceFile - the file to copy from. Must not be null.

destFile - the file to copy to. Must not be null.

filters - the collection of filters to apply to this copy.

filterChains - filterChains to apply during the copy.

overwrite - Whether or not the destination file should be overwritten if it already exists.

preserveLastModified - Whether or not the last modified time of the resulting file should be set to that of the source file.

append - whether to append to the destination file.

inputEncoding - the encoding used to read the files.

outputEncoding - the encoding used to write the files.

project - the project instance.

Throws:

IOException - if the copying fails.

Since:

Ant 1.8

copyFile

public void copyFile(File sourceFile,
                     File destFile,
                     FilterSetCollection filters,
                     Vector filterChains,
                     boolean overwrite,
                     boolean preserveLastModified,
                     boolean append,
                     String inputEncoding,
                     String outputEncoding,
                     Project project,
                     boolean force)
              throws IOException

Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if filter chains must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.

Parameters:

sourceFile - the file to copy from. Must not be null.

destFile - the file to copy to. Must not be null.

filters - the collection of filters to apply to this copy.

filterChains - filterChains to apply during the copy.

overwrite - Whether or not the destination file should be overwritten if it already exists.

preserveLastModified - Whether or not the last modified time of the resulting file should be set to that of the source file.

append - whether to append to the destination file.

inputEncoding - the encoding used to read the files.

outputEncoding - the encoding used to write the files.

project - the project instance.

force - whether to overwrite read-only destination files.

Throws:

IOException - if the copying fails.

Since:

Ant 1.8.2

copyFile

public void copyFile(File sourceFile,
                     File destFile,
                     FilterSetCollection filters,
                     Vector filterChains,
                     boolean overwrite,
                     boolean preserveLastModified,
                     String encoding,
                     Project project)
              throws IOException

Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if filter chains must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.

Parameters:

sourceFile - the file to copy from. Must not be null.

destFile - the file to copy to. Must not be null.

filters - the collection of filters to apply to this copy.

filterChains - filterChains to apply during the copy.

overwrite - Whether or not the destination file should be overwritten if it already exists.

preserveLastModified - Whether or not the last modified time of the resulting file should be set to that of the source file.

encoding - the encoding used to read and write the files.

project - the project instance.

Throws:

IOException - if the copying fails.

Since:

Ant 1.5

copyFile

public void copyFile(File sourceFile,
                     File destFile,
                     FilterSetCollection filters,
                     Vector filterChains,
                     boolean overwrite,
                     boolean preserveLastModified,
                     String inputEncoding,
                     String outputEncoding,
                     Project project)
              throws IOException

Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if filter chains must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.

Parameters:

sourceFile - the file to copy from. Must not be null.

destFile - the file to copy to. Must not be null.

filters - the collection of filters to apply to this copy.

filterChains - filterChains to apply during the copy.

overwrite - Whether or not the destination file should be overwritten if it already exists.

preserveLastModified - Whether or not the last modified time of the resulting file should be set to that of the source file.

inputEncoding - the encoding used to read the files.

outputEncoding - the encoding used to write the files.

project - the project instance.

Throws:

IOException - if the copying fails.

Since:

Ant 1.6

copyFile

public void copyFile(String sourceFile,
                     String destFile)
              throws IOException

Convenience method to copy a file from a source to a destination. No filtering is performed.

Parameters:

sourceFile - Name of file to copy from. Must not be null.

destFile - Name of file to copy to. Must not be null.

Throws:

IOException - if the copying fails.

copyFile

public void copyFile(String sourceFile,
                     String destFile,
                     FilterSetCollection filters)
              throws IOException

Convenience method to copy a file from a source to a destination specifying if token filtering must be used.

Parameters:

sourceFile - Name of file to copy from. Must not be null.

destFile - Name of file to copy to. Must not be null.

filters - the collection of filters to apply to this copy.

Throws:

IOException - if the copying fails.

copyFile

public void copyFile(String sourceFile,
                     String destFile,
                     FilterSetCollection filters,
                     boolean overwrite)
              throws IOException

Convenience method to copy a file from a source to a destination specifying if token filtering must be used and if source files may overwrite newer destination files.

Parameters:

sourceFile - Name of file to copy from. Must not be null.

destFile - Name of file to copy to. Must not be null.

filters - the collection of filters to apply to this copy.

overwrite - Whether or not the destination file should be overwritten if it already exists.

Throws:

IOException - if the copying fails.

copyFile

public void copyFile(String sourceFile,
                     String destFile,
                     FilterSetCollection filters,
                     boolean overwrite,
                     boolean preserveLastModified)
              throws IOException

Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.

Parameters:

sourceFile - Name of file to copy from. Must not be null.

destFile - Name of file to copy to. Must not be null.

filters - the collection of filters to apply to this copy.

overwrite - Whether or not the destination file should be overwritten if it already exists.

preserveLastModified - Whether or not the last modified time of the resulting file should be set to that of the source file.

Throws:

IOException - if the copying fails.

copyFile

public void copyFile(String sourceFile,
                     String destFile,
                     FilterSetCollection filters,
                     boolean overwrite,
                     boolean preserveLastModified,
                     String encoding)
              throws IOException

Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.

Parameters:

sourceFile - Name of file to copy from. Must not be null.

destFile - Name of file to copy to. Must not be null.

filters - the collection of filters to apply to this copy.

overwrite - Whether or not the destination file should be overwritten if it already exists.

preserveLastModified - Whether or not the last modified time of the resulting file should be set to that of the source file.

encoding - the encoding used to read and write the files.

Throws:

IOException - if the copying fails.

Since:

Ant 1.5

copyFile

public void copyFile(String sourceFile,
                     String destFile,
                     FilterSetCollection filters,
                     Vector filterChains,
                     boolean overwrite,
                     boolean preserveLastModified,
                     String encoding,
                     Project project)
              throws IOException

Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if filter chains must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.

Parameters:

sourceFile - Name of file to copy from. Must not be null.

destFile - Name of file to copy to. Must not be null.

filters - the collection of filters to apply to this copy.

filterChains - filterChains to apply during the copy.

overwrite - Whether or not the destination file should be overwritten if it already exists.

preserveLastModified - Whether or not the last modified time of the resulting file should be set to that of the source file.

encoding - the encoding used to read and write the files.

project - the project instance.

Throws:

IOException - if the copying fails.

Since:

Ant 1.5

copyFile

public void copyFile(String sourceFile,
                     String destFile,
                     FilterSetCollection filters,
                     Vector filterChains,
                     boolean overwrite,
                     boolean preserveLastModified,
                     String inputEncoding,
                     String outputEncoding,
                     Project project)
              throws IOException

Convenience method to copy a file from a source to a destination specifying if token filtering must be used, if filter chains must be used, if source files may overwrite newer destination files and the last modified time of destFile file should be made equal to the last modified time of sourceFile.

Parameters:

sourceFile - Name of file to copy from. Must not be null.

destFile - Name of file to copy to. Must not be null.

filters - the collection of filters to apply to this copy.

filterChains - filterChains to apply during the copy.

overwrite - Whether or not the destination file should be overwritten if it already exists.

preserveLastModified - Whether or not the last modified time of the resulting file should be set to that of the source file.

inputEncoding - the encoding used to read the files.

outputEncoding - the encoding used to write the files.

project - the project instance.

Throws:

IOException - if the copying fails.

Since:

Ant 1.6

createNewFile

public boolean createNewFile(File f)
                      throws IOException

This was originally an emulation of File.createNewFile for JDK 1.1, but it is now implemented using that method (Ant 1.6.3 onwards).

This method has historically not guaranteed that the operation was atomic. In its current implementation it is.

Parameters:

f - the file to be created.

Returns:

true if the file did not exist already.

Throws:

IOException - on error.

Since:

Ant 1.5

createNewFile

public boolean createNewFile(File f,
                             boolean mkdirs)
                      throws IOException

Create a new file, optionally creating parent directories.

Parameters:

f - the file to be created.

mkdirs - boolean whether to create parent directories.

Returns:

true if the file did not exist already.

Throws:

IOException - on error.

Since:

Ant 1.6.3

createTempFile

public File createTempFile(String prefix,
                           String suffix,
                           File parentDir,
                           boolean deleteOnExit,
                           boolean createFile)

Create a temporary file in a given directory.

The file denoted by the returned abstract pathname did not exist before this method was invoked, any subsequent invocation of this method will yield a different file name.

Parameters:

prefix - prefix before the random number.

suffix - file extension; include the '.'.

parentDir - Directory to create the temporary file in; java.io.tmpdir used if not specified.

deleteOnExit - whether to set the tempfile for deletion on normal VM exit.

createFile - true if the file must actually be created. If false chances exist that a file with the same name is created in the time between invoking this method and the moment the file is actually created. If possible set to true.

Returns:

a File reference to the new temporary file.

Since:

Ant 1.7.1

delete

public static void delete(File file)

Delete the file with File.delete() if the argument is not null. Do nothing on a null argument.

Parameters:

file - file to delete.

dissect

public String[] dissect(String path)

Dissect the specified absolute path.

Parameters:

path - the path to dissect.

Returns:

String[] {root, remaining path}.

Throws:

NullPointerException - if path is null.

Since:

Ant 1.7

fileNameEquals

public boolean fileNameEquals(File f1,
                              File f2)

Compares two filenames.

Unlike java.io.File#equals this method will try to compare the absolute paths and "normalize" the filenames before comparing them.

Parameters:

f1 - the file whose name is to be compared.

f2 - the other file whose name is to be compared.

Returns:

true if the file are for the same file.

Since:

Ant 1.5.3

fromURI

public String fromURI(String uri)

Constructs a file path from a file: URI.

Will be an absolute path if the given URI is absolute.

Swallows '%' that are not followed by two characters, doesn't deal with non-ASCII characters.

Parameters:

uri - the URI designating a file in the local filesystem.

Returns:

the local file system path for the file.

Since:

Ant 1.6

getDefaultEncoding

public String getDefaultEncoding()

Get the default encoding. This is done by opening an InputStreamReader on a dummy InputStream and getting the encoding. Could use System.getProperty("file.encoding"), but cannot see where this is documented.

Returns:

the default file encoding.

getFileTimestampGranularity

public long getFileTimestampGranularity()

Get the granularity of file timestamps. The choice is made based on OS, which is incorrect--it should really be by filesystem. We do not have an easy way to probe for file systems, however, so this heuristic gives us a decent default.

Returns:

the difference, in milliseconds, which two file timestamps must have in order for the two files to be considered to have different timestamps.

getFileURL

public URL getFileURL(File file)
               throws MalformedURLException

Get the URL for a file taking into account # characters.

Parameters:

file - the file whose URL representation is required.

Returns:

The FileURL value.

Throws:

MalformedURLException - if the URL representation cannot be formed.

getFileUtils

public static FileUtils getFileUtils()

Method to retrieve The FileUtils, which is shared by all users of this method.

Returns:

an instance of FileUtils.

Since:

Ant 1.6.3

getPath

public static String getPath(List pathStack)

Gets path from a List of Strings.

Parameters:

pathStack - List of Strings to be concatenated as a path.

Returns:

String, never null

Since:

Ant 1.7

getPath

public static String getPath(List pathStack,
                             char separatorChar)

Gets path from a List of Strings.

Parameters:

pathStack - List of Strings to be concated as a path.

separatorChar - char to be used as separator between names in path

Returns:

String, never null

Since:

Ant 1.7

getPathStack

public static String[] getPathStack(String path)

Gets all names of the path as an array of Strings.

Parameters:

path - to get names from

Returns:

Strings, never null

Since:

Ant 1.7

getRelativePath

public static String getRelativePath(File fromFile,
                                     File toFile)
                              throws Exception

Calculates the relative path between two files.

Implementation note:
This function may throw an IOException if an I/O error occurs because its use of the canonical pathname may require filesystem queries.

Parameters:

fromFile - the File to calculate the path from

toFile - the File to calculate the path to

Returns:

the relative path between the files

Throws:

Exception - for undocumented reasons

Since:

Ant 1.7

See Also:

File.getCanonicalPath()

hasErrorInCase

public boolean hasErrorInCase(File localFile)

test whether a file or directory exists, with an error in the upper/lower case spelling of the name. Using this method is only interesting on case insensitive file systems (Windows).
It will return true only if 3 conditions are met :

• operating system is case insensitive
• file exists
• actual name from directory reading is different from the supplied argument

the purpose is to identify files or directories on case-insensitive filesystems whose case is not what is expected.
Possibly to rename them afterwards to the desired upper/lowercase combination.

Parameters:

localFile - file to test

Returns:

true if the file exists and the case of the actual file is not the case of the parameter

Since:

Ant 1.7.1

isAbsolutePath

public static boolean isAbsolutePath(String filename)

Verifies that the specified filename represents an absolute path. Differs from new java.io.File("filename").isAbsolute() in that a path beginning with a double file separator--signifying a Windows UNC--must at minimum match "\\a\b" to be considered an absolute path.

Parameters:

filename - the filename to be checked.

Returns:

true if the filename represents an absolute path.

Throws:

NullPointerException - if filename is null.

Since:

Ant 1.6.3

isContextRelativePath

public static boolean isContextRelativePath(String filename)

On DOS and NetWare, the evaluation of certain file specifications is context-dependent. These are filenames beginning with a single separator (relative to current root directory) and filenames with a drive specification and no intervening separator (relative to current directory of the specified root).

Parameters:

filename - the filename to evaluate.

Returns:

true if the filename is relative to system context.

Throws:

NullPointerException - if filename is null.

Since:

Ant 1.7

isLeadingPath

public boolean isLeadingPath(File leading,
                             File path)

Learn whether one path "leads" another.

Parameters:

leading - The leading path, must not be null, must be absolute.

path - The path to remove from, must not be null, must be absolute.

Returns:

true if path starts with leading; false otherwise.

Since:

Ant 1.7

isUpToDate

public boolean isUpToDate(File source,
                          File dest)

Returns true if the source is older than the dest.

Parameters:

source - source file (should be the older).

dest - dest file (should be the newer).

Returns:

true if the source is older than the dest, taking the granularity into account.

Since:

Ant 1.6.3

isUpToDate

public boolean isUpToDate(File source,
                          File dest,
                          long granularity)

Returns true if the source is older than the dest. If the dest file does not exist, then the test returns false; it is implicitly not up do date.

Parameters:

source - source file (should be the older).

dest - dest file (should be the newer).

granularity - an offset added to the source time.

Returns:

true if the source is older than the dest after accounting for granularity.

Since:

Ant 1.6.3

isUpToDate

public boolean isUpToDate(long sourceTime,
                          long destTime)

Compare two timestamps for being up to date using the current granularity.

Parameters:

sourceTime - timestamp of source file.

destTime - timestamp of dest file.

Returns:

true if the dest file is considered up to date.

isUpToDate

public boolean isUpToDate(long sourceTime,
                          long destTime,
                          long granularity)

Compare two timestamps for being up to date using the specified granularity.

Parameters:

sourceTime - timestamp of source file.

destTime - timestamp of dest file.

granularity - os/filesys granularity.

Returns:

true if the dest file is considered up to date.

normalize

public File normalize(String path)

"Normalize" the given absolute path.

This includes:

• Uppercase the drive letter if there is one.
• Remove redundant slashes after the drive spec.
• Resolve all ./, .\, ../ and ..\ sequences.
• DOS style paths that start with a drive letter will have \ as the separator.

Unlike File.getCanonicalPath() this method specifically does not resolve symbolic links.

Parameters:

path - the path to be normalized.

Returns:

the normalized version of the path.

Throws:

NullPointerException - if path is null.

readFully

public static String readFully(Reader rdr)
                        throws IOException

Read from reader till EOF.

Parameters:

rdr - the reader from which to read.

Returns:

the contents read out of the given reader.

Throws:

IOException - if the contents could not be read out from the reader.

readFully

public static String readFully(Reader rdr,
                               int bufferSize)
                        throws IOException

Read from reader till EOF.

Parameters:

rdr - the reader from which to read.

bufferSize - the buffer size to use when reading.

Returns:

the contents read out of the given reader.

Throws:

IOException - if the contents could not be read out from the reader.

removeLeadingPath

public String removeLeadingPath(File leading,
                                File path)

Removes a leading path from a second path.

Parameters:

leading - The leading path, must not be null, must be absolute.

path - The path to remove from, must not be null, must be absolute.

Returns:

path's normalized absolute if it doesn't start with leading; path's path with leading's path removed otherwise.

Since:

Ant 1.5

rename

public void rename(File from,
                   File to)
            throws IOException

Renames a file, even if that involves crossing file system boundaries.

This will remove to (if it exists), ensure that to's parent directory exists and move from, which involves deleting from as well.

Parameters:

from - the file to move.

to - the new file name.

Throws:

IOException - if anything bad happens during this process. Note that to may have been deleted already when this happens.

Since:

Ant 1.6

resolveFile

public File resolveFile(File file,
                        String filename)

Interpret the filename as a file relative to the given file unless the filename already represents an absolute filename. Differs from new File(file, filename) in that the resulting File's path will always be a normalized, absolute pathname. Also, if it is determined that filename is context-relative, file will be discarded and the reference will be resolved using available context/state information about the filesystem.

Parameters:

file - the "reference" file for relative paths. This instance must be an absolute file and must not contain "./" or "../" sequences (same for \ instead of /). If it is null, this call is equivalent to new java.io.File(filename).getAbsoluteFile().

filename - a file name.

Returns:

an absolute file.

Throws:

NullPointerException - if filename is null.

safeReadFully

public static String safeReadFully(Reader reader)
                            throws IOException

Safe read fully - do not return a null for an empty reader.

Parameters:

reader - the input to read from.

Returns:

the string.

Throws:

IOException - if unable to read from reader.

Since:

Ant 1.7.1

setFileLastModified

public void setFileLastModified(File file,
                                long time)

Calls File.setLastModified(long time). Originally written to to dynamically bind to that call on Java1.2+.

Parameters:

file - the file whose modified time is to be set

time - the time to which the last modified time is to be set. if this is -1, the current time is used.

toURI

public String toURI(String path)

Constructs a file: URI that represents the external form of the given pathname.

Will be an absolute URI if the given path is absolute.

This code encodes non ASCII characters too.

The coding of the output is the same as what File.toURI().toASCIIString() produces

See dt-sysid which makes some mention of how characters not supported by URI Reference syntax should be escaped.

Parameters:

path - the path in the local file system.

Returns:

the URI version of the local path.

Since:

Ant 1.6

toVMSPath

public String toVMSPath(File f)

Returns a VMS String representation of a File object. This is useful since the JVM by default internally converts VMS paths to Unix style. The returned String is always an absolute path.

Parameters:

f - The File to get the VMS path for.

Returns:

The absolute VMS path to f.

translatePath

public static String translatePath(String toProcess)

Translate a path into its native (platform specific) format.

This method uses PathTokenizer to separate the input path into its components. This handles DOS style paths in a relatively sensible way. The file separators are then converted to their platform specific versions.

Parameters:

toProcess - The path to be translated. May be null.

Returns:

the native version of the specified path or an empty string if the path is null or empty.

Since:

ant 1.7

See Also:

PathTokenizer

tryHardToDelete

public boolean tryHardToDelete(File f)

Accommodate Windows bug encountered in both Sun and IBM JDKs. Others possible. If the delete does not work, call System.gc(), wait a little and try again.

Returns:

whether deletion was successful

Since:

Ant 1.8.0

tryHardToDelete

public boolean tryHardToDelete(File f,
                               boolean runGC)

If delete does not work, call System.gc() if asked to, wait a little and try again.

Returns:

whether deletion was successful

Since:

Ant 1.8.3