File Module

The file module contains extension functions to perform file system related operations, such as listing, reading, or writing files. All functions are preceded by the file: prefix. Some changes might happen to this module, as it is currently aligned with the upcoming EXPath specification.

file:exists

Signatures	file:exists($path as xs:string) as xs:boolean
Summary	Checks if a path exist.
Rules	This function checks if a path is already used in the file system. The function returns true if the file or directory pointed by the $path parameter already exists. Otherwise it returns false.

file:is-directory

Signatures	file:is-directory($path as xs:string) as xs:boolean
Summary	Checks if a path points to a directory.
Rules	This function checks if a path points to a directory. The function returns true if the path points to a directory. Otherwise, it returns false.

file:is-file

Signatures	file:is-file($path as xs:string) as xs:boolean
Summary	Checks if a path points to a file.
Rules	This function checks if a path points to a file. The function returns true if the path points to a file. Otherwise, it returns false.

file:is-readable

Signatures	file:is-readable($path as xs:string) as xs:boolean
Summary	Checks if a file is readable.
Rules	This function checks if the file pointed by $path is readable. The function returns true if the file is readable. Otherwise it returns false.

file:is-writable

Signatures	file:is-writable($path as xs:string) as xs:boolean
Summary	Checks if a file is writeable.
Rules	This function checks if the file pointed by $path is writeable. The function returns true if the file is writeable. Otherwise it returns false.

file:last-modified

Signatures	file:last-modified($path as xs:string) as xs:dateTime
Summary	Returns the timestamp of a path.
Rules	This function retrieves the timestamp of the last modification of the item pointed by the path provided by the parameter$path.

file:files

Signatures	file:files($path as xs:string) as xs:string* file:files($path as xs:string, $recursive as xs:boolean) as xs:string* file:files($path as xs:string, $recursive as xs:boolean, $pattern as xs:string) as xs:string*
Summary	Lists files of a directory.
Rules	This function lists all files in a given directory. The special files "." and ".." are never returned. The optional parameter $recursive indicates whether the search shall recurse in the subdirectories. The optional parameter $pattern defines a pattern and if it is present, only the files, which names match the given pattern, will be returned.
Errors	[FOFL0003] is raised if files in the given directory cannot be returned. [FOFL0004] is raised for an invalid file pattern.

file:read

Signatures	file:read($path as xs:string) as xs:string
Summary	Reads a file.
Rules	This function reads the content of the file pointed by $path and returns it as a string. The optional parameter $encoding defines the encoding type of the file.
Errors	[FOFL0017] is raised if the provided encoding is not supported.

file:read-binary

Signatures	file:read-binary($path as xs:string) as xs:base64Binary
Summary	Reads a binary file.
Rules	This function reads the content of the file pointed by $path and returns it in Base64 representation.
Errors	[FOFL0001] is raised if the file cannot be read.

file:size

Signatures	file:size($path as xs:string) as xs:integer
Summary	Returns the file size.
Rules	This function returns the size, in bytes, of the file pointed by $path.
Errors	[FOFL0001] is raised if the file cannot be read.

file:write

Signatures	file:write($path as xs:string, $items as xs:item()*, $params as xs:node()*) as empty-sequence() file:write($path as xs:string, $items as xs:item()*, $params as xs:node()*, $append as xs:boolean) as empty-sequence()
Summary	Writes a sequence of items to a file.
Rules	This function writes a sequence of items to a file. It either creates a new file, or appends the serialized content to the file pointed by $path. The $params parameter is used to set the serialization parameters as defined in XSLT 2.0 and XQuery 1.0 Serialization. If the $append flag is true and the file does not exist, a new one is created.
Errors	[FOFL0002] is raised if the file cannot be written. [FOFL0008] is raised if the $append flag is false and a file with the same path already exists.

file:write-binary

Signatures	file:write-binary($path as xs:string, $items as xs:base64Binary) as empty-sequence() file:write-binary($path as xs:string, $items as xs:base64Binary, $append as xs:boolean) as empty-sequence()
Summary	Writes a sequence of items to a file.
Rules	This function writes binary data into a file. It either creates a new file or appends the content to the file pointed by $path. If the $append flag is true and the file does not exist, a new one is created.
Errors	[FOFL0002] is raised if the file cannot be written. [FOFL0008] is raised if the $append flag is false and a file with the same path already exists.

file:mkdir

Signatures	file:mkdir($path as xs:string, $recursive as xs:boolean) as empty-sequence()
Summary	Creates a new directory.
Rules	This function creates a directory. The optional parameter $recursive indicates whether parent directories are to be created recursively.
Errors	[FOFL0008] is raised if a file with the same path already exists in the file system. [FOFL0011] is raised if the directory in which the new sub-directory is to be created is write protected. [FOFL0012] is raised if the directory cannot be created for some other reason.

file:delete

Signatures	file:delete($path as xs:string) as empty-sequence() file:delete($path as xs:string, $recursive as xs:boolean) as empty-sequence()
Summary	Deletes a file.
Rules	This function deletes a file or directory from the file system. If the optional parameter $recursive is provided, the operation is performed recursively for all sub-directories of the given directory.
Errors	[FOFL0005] is raised if the file/directory pointed by $path is write-protected and cannot be deleted. [FOFL0006] is raised if the file/directory pointed by $path does not exist. [FOFL0013] is raised if the file/directory pointed by $path cannot be deleted for some other reason.

file:copy

Signatures	file:copy($source as xs:string, $target as xs:string) as empty-sequence() file:copy($source as xs:string, $target as xs:string, $overwrite as xs:boolean) as empty-sequence()
Summary	Copies a file.
Rules	This function copies a file specified by $source to $target. If the optional parameter $overwrite is provided and evaluates to true, the target file, if it exists, will be overwritten.
Errors	[FOFL0006] is raised if the file pointed by $source does not exist. [FOFL0008] is raised if the file to be copied already exists in the specified target and the $overwrite parameter is missing or evaluates to false. [FOFL0016] is raised if the source file cannot be copied because of some other reason.

file:move

Signatures	file:move($source as xs:string, $target as xs:string) as empty-sequence()
Summary	Moves a file.
Rules	This function moves/renames the file pointed by $source to $target.
Errors	[FOFL0006] is raised if the file pointed by $source does not exist. [FOFL0008] is raised if a file/directory with the same name already exists in the given target. [FOFL0009] is raised if the item pointed by $source is a directory. [FOFL0010] is raised if the file pointed by $source is write-protected and cannot be moved. [FOFL0014] is raised if the file cannot be moved for some other reason.

file:path-separator

Signatures	file:path-separator() as xs:string
Summary	Returns the path separator.
Rules	This function returns the path separator used by the operating system.

file:path-to-full-path

Signatures	file:path-to-full-path($path as xs:string) as xs:string
Summary	Returns a full path representation.
Rules	This function transforms a path into a full operating system path.

file:path-to-uri

Signatures	file:path-to-uri($path as xs:string) as xs:string
Summary	>Returns a URI representation.
Rules	This function transforms a file system path into a URI with the file:// scheme.