Difference between revisions of "File Module"
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| valign='top' | '''Summary''' | | valign='top' | '''Summary''' | ||
− | |Writes a sequence of <code>$items</code> to a file specified by <code>$path</code>. If the specified file already exists, it will be overwritten.<br />The optional argument <code>$params</code> is used to set the serialization parameters (see [[Serialization]] for more details).<br /> | + | |Writes a sequence of <code>$items</code> to a file specified by <code>$path</code>. If the specified file already exists, it will be overwritten.<br />The optional argument <code>$params</code> is used to set the serialization parameters (see [[Serialization]] for more details).It can be specified as<br /> |
+ | * <code>element(serialization-parameters)</code>: <code><serialization-parameters/></code> must be used as root element, and the parameters are specified as child nodes, with the element name representing the serialization parameter and the attribute <code>value</code> representing its value:<br /><code><serialization-parameters xmlns="http://www.w3.org/2010/xslt-xquery-serialization"><br/> <method value='xml'/><br/> <cdata-section-elements value="div"/><br/> ...<br/></serialization-parameters></code> | ||
+ | * [[Map_Functions|map structure]]: all parameters can be directly represented as key/value pairs:<br /><code>map { "method" := "xml", "cdata-section-elements" := "div", ... </code>}<br/> | ||
|- | |- | ||
| valign='top' | '''Errors''' | | valign='top' | '''Errors''' |
Revision as of 22:02, 14 September 2011
This module contains XQuery functions and variables related to file system operations, such as listing, reading, or writing files. All functions are preceded by the file:
prefix, which is linked to the http://expath.org/ns/file
namespace. This module has been aligned with the latest EXPath File Module draft from 2011 (expected to be online soon).
Contents
- 1 $file:directory-separator
- 2 $file:path-separator
- 3 file:exists
- 4 file:is-directory
- 5 file:is-file
- 6 file:last-modified
- 7 file:size
- 8 file:base-name
- 9 file:dir-name
- 10 file:path-to-native
- 11 file:resolve-path
- 12 file:path-to-uri
- 13 file:list
- 14 file:create-directory
- 15 file:delete
- 16 file:read-text
- 17 file:read-binary
- 18 file:write
- 19 file:write-binary
- 20 file:append
- 21 file:append-binary
- 22 file:copy
- 23 file:move
$file:directory-separator
Signatures | $file:directory-separator as xs:string |
Summary | This variable returns the directory separator used by the operating system, such as "/" or "\". |
$file:path-separator
Signatures | $file:path-separator as xs:string |
Summary | This variable returns the path separator used by the operating system, such as ";" or ":". |
file:exists
Signatures | file:exists($path as xs:string) as xs:boolean |
Summary | Returns an xs:boolean indicating whether a file or directory specified by $path exists in the file system. |
file:is-directory
Signatures | file:is-directory($path as xs:string) as xs:boolean |
Summary | Returns an xs:boolean indicating whether the argument $path points to an existing directory. |
file:is-file
Signatures | file:is-file($path as xs:string) as xs:boolean |
Summary | Returns an xs:boolean indicating whether the argument $path points to an existing file. |
file:last-modified
Signatures | file:last-modified($path as xs:string) as xs:dateTime |
Summary | Retrieves the timestamp of the last modification of the file or directory specified by $path . |
Errors | FOFL0001 is raised if the specified path does not exist. |
file:size
Signatures | file:size($file as xs:string) as xs:integer |
Summary | Returns the size, in bytes, of the file specified by $path . |
Errors | FOFL0001 is raised if the specified file does not exist. FOFL0004 is raised if the specified file points to a directory. |
file:base-name
Signatures | file:base-name($path as xs:string) as xs:string file:base-name($path as xs:string, $suffix as xs:string) as xs:string |
Summary | Returns the base-name of the path specified by $path , which is the component after the last directory separator.If $suffix is specified, it will be trimmed from the end of the result. |
file:dir-name
Signatures | file:dir-name($path as xs:string) as xs:string |
Summary | Returns the parent directory of the path specified by $path , which is the component before the last directory separator. |
file:path-to-native
Signatures | file:path-to-native($path as xs:string) as xs:string |
Summary | Transforms the $path argument to its native representation on the operating system. |
Errors | FOFL0000 is raised if the specified path cannot be transformed to its native representation. |
file:resolve-path
Signatures | file:resolve-path($path as xs:string) as xs:string |
Summary | Transforms the $path argument to an absolute operating system path. |
file:path-to-uri
Signatures | file:path-to-uri($path as xs:string) as xs:string |
Summary | Transforms the path specified by $path into a URI with the file:// scheme. |
file:list
Signatures | file:list($directory as xs:string) as xs:string* file:list($directory as xs:string, $recursive as xs:boolean) as xs:string* file:list($directory as xs:string, $recursive as xs:boolean, $pattern as xs:string) as xs:string* |
Summary | Lists all files and directories found in the specified $directory . The returned paths are relative to the provided path.The optional parameter $recursive specifies whether the sub-directories are to be recursed as well.The optional parameter $pattern defines a file name pattern in the glob syntax. If present, only those files and directories are returned that correspond to the pattern. Several patterns can be separated with a comma (, ). |
Errors | FOFL0003 is raised if the specified path does not point to a directory. FOFL0000 is raised if the operation fails for some other reason. |
file:create-directory
Signatures | file:create-directory($directory as xs:string) as empty-sequence() |
Summary | Recursively creates the directories specified by $directory . |
Errors | FOFL0002 is raised if a file with the same path already exists. FOFL0000 is raised if the operation fails for some other reason. |
file:delete
Signatures | file:delete($path as xs:string) as empty-sequence() |
Summary | Recursively deletes a file or directory specified by $path . |
Errors | FOFL0001 is raised if the specified path does not exist. FOFL0000 is raised if the operation fails for some other reason. |
file:read-text
Signatures | file:read-text($path as xs:string) as xs:string file:read-text($path as xs:string, $encoding as xs:string) as xs:string |
Summary | Reads the textual contents of the file specified by $path and returns it as a xs:string .The optional parameter $encoding defines the encoding of the file. |
Errors | FOFL0001 is raised if the specified file does not exist. FOFL0004 is raised if the specified path is a directory. FOFL0005 is raised if the specified encoding is not supported, or unknown. FOFL0000 is raised if the operation fails for some other reason. |
file:read-binary
Signatures | file:read-binary($path as xs:string) as xs:base64Binary |
Summary | Reads the binary content of the file specified by $path and returns as a xs:base64Binary . |
Errors | FOFL0001 is raised if the specified file does not exist. FOFL0004 is raised if the specified path is a directory. FOFL0000 is raised if the operation fails for some other reason. |
file:write
Signatures | file:write($path as xs:string, $items as xs:item()*) as empty-sequence() file:write($path as xs:string, $items as xs:item()*, $params as xs:node()*) as empty-sequence() |
Summary | Writes a sequence of $items to a file specified by $path . If the specified file already exists, it will be overwritten.The optional argument $params is used to set the serialization parameters (see Serialization for more details).It can be specified as
|
Errors | FOFL0004 is raised if the specified path is a directory. FOFL0000 is raised if the operation fails for some other reason. |
file:write-binary
Signatures | file:write-binary($path as xs:string, $items as xs:base64Binary*) as empty-sequence() |
Summary | Writes a sequence of xs:basex64Binary $items to a file specified by $path . If the specified file already exists, it will be overwritten. |
Errors | FOFL0004 is raised if the specified path is a directory. FOFL0000 is raised if the operation fails for some other reason. |
file:append
Signatures | file:append($path as xs:string, $items as xs:item()*) as empty-sequence() file:append($path as xs:string, $items as xs:item()*, $params as xs:node()*) as empty-sequence() |
Summary | Appends a sequence of $items to a file specified by $path . If the specified file does not exists, a new file is created. |
Errors | FOFL0004 is raised if the specified path is a directory. FOFL0000 is raised if the operation fails for some other reason. |
file:append-binary
Signatures | file:append-binary($path as xs:string, $items as xs:base64Binary*) as empty-sequence() |
Summary | Appends a sequence of xs:basex64Binary $items to a file specified by $path . If the specified file does not exists, a new file is created. |
Errors | FOFL0004 is raised if the specified path is a directory. FOFL0000 is raised if the operation fails for some other reason. |
file:copy
Signatures | file:copy($source as xs:string, $target as xs:string) as empty-sequence() |
Summary | Copies a file specified by $source to the file or directory specified by $target . If the target represents an existing file, it will be overwritten. No operation will be performed if the source and target path are equal. |
Errors | FOFL0001 is raised if the specified source does not exist. FOFL0002 is raised if the specified source is a directory and the target is a file. FOFL0003 is raised if the parent of the specified target is no directory. FOFL0000 is raised if the operation fails for some other reason. |
file:move
Signatures | file:move($source as xs:string, $target as xs:string) as empty-sequence() |
Summary | Moves or renames the file or directory specified by $source to the path specified by $target . No operation will be performed if the source and target path are equal. |
Errors | FOFL0001 is raised if the specified source does not exist. FOFL0002 is raised if the specified source is a directory and the target is a file. FOFL0003 is raised if the parent of the specified target is no directory. FOFL0000 is raised if the operation fails for some other reason. |