FileUtils (Apache Jena)

java.lang.Object
- org.apache.jena.util.FileUtils

```
public class FileUtils
extends Object
```

Field Summary

Fields
Modifier and Type Field and Description

static String langN3

static String langNTriple

static String langTurtle

static String langXML

static String langXMLAbbrev

Fields
Modifier and Type	Field and Description
`static String`	`langN3`
`static String`	`langNTriple`
`static String`	`langTurtle`
`static String`	`langXML`
`static String`	`langXMLAbbrev`

Constructor Summary

Constructors
Constructor and Description

FileUtils()

Constructors
Constructor and Description
`FileUtils()`

Method Summary

All Methods Static Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`static BufferedReader`	`asBufferedUTF8(InputStream in)` Create a buffered reader that uses UTF-8 encoding
`static PrintWriter`	`asPrintWriterUTF8(OutputStream out)` Create a print writer that uses UTF-8 encoding
`static Reader`	`asUTF8(InputStream in)` Create a reader that uses UTF-8 encoding
`static Writer`	`asUTF8(OutputStream out)` Create a writer that uses UTF-8 encoding
`static String`	`decodeFileName(String s)`
`static String`	`getDirname(String filename)` Get the directory part of a filename
`static String`	`getFilenameExt(String filename)` Get the suffix part of a file name or a URL in file-like format.
`static String`	`getScheme(String uri)`
`static File`	`getScratchDirectory(String prefix)` Answer a File naming a freshly-created directory in the temporary directory.
`static String`	`getTempDirectory()`
`static String`	`guessLang(String urlStr)` Guess the language/type of model data If the URI ends ".rdf", it is assumed to be RDF/XML If the URI ends ".nt", it is assumed to be N-Triples If the URI ends ".ttl", it is assumed to be Turtle If the URI ends ".owl", it is assumed to be RDF/XML
`static String`	`guessLang(String name, String otherwise)` Guess the language/type of model data.
`static boolean`	`isFile(String name)` Check whether 'name' is possibly a file reference
`static boolean`	`isURI(String name)` Check whether a name is an absolute URI (has a scheme name)
`static BufferedReader`	`openResourceFile(String filename)` Answer a BufferedReader than reads from the named resource file as UTF-8, possibly throwing WrappedIOExceptions.
`static InputStream`	`openResourceFileAsStream(String filename)` Open an resource file for reading.
`static BufferedReader`	`readerFromURL(String urlStr)`
`static String`	`readWholeFileAsUTF8(InputStream in)` Read a whole stream as UTF-8
`static String`	`readWholeFileAsUTF8(String filename)` Read a whole file as UTF-8
`static File`	`tempFileName(String prefix, String suffix)` create a temporary file that will be deleted on exit, and do something sensible with any IO exceptions - namely, throw them up wrapped in a JenaException.
`static String`	`toFilename(String filenameOrURI)` Turn a file: URL or file name into a plain file name
`static String`	`toURL(String filename)` Deprecated.

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - langXML
```
public static final String langXML
```
    See Also:
    
    Constant Field Values
  - langXMLAbbrev
```
public static final String langXMLAbbrev
```
    See Also:
    
    Constant Field Values
  - langNTriple
```
public static final String langNTriple
```
    See Also:
    
    Constant Field Values
  - langN3
```
public static final String langN3
```
    See Also:
    
    Constant Field Values
  - langTurtle
```
public static final String langTurtle
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - FileUtils
```
public FileUtils()
```
- Method Detail
  - asUTF8
```
public static Reader asUTF8(InputStream in)
```
    Create a reader that uses UTF-8 encoding
  - asBufferedUTF8
```
public static BufferedReader asBufferedUTF8(InputStream in)
```
    Create a buffered reader that uses UTF-8 encoding
  - asUTF8
```
public static Writer asUTF8(OutputStream out)
```
    Create a writer that uses UTF-8 encoding
  - asPrintWriterUTF8
```
public static PrintWriter asPrintWriterUTF8(OutputStream out)
```
    Create a print writer that uses UTF-8 encoding
  - guessLang
```
public static String guessLang(String name,
                               String otherwise)
```
    Guess the language/type of model data.
    - If the URI ends ".rdf", it is assumed to be RDF/XML
    - If the URI ends ".nt", it is assumed to be N-Triples
    - If the URI ends ".ttl", it is assumed to be Turtle
    - If the URI ends ".owl", it is assumed to be RDF/XML
    Parameters:
    
    name - URL to base the guess on
    
    otherwise - Default guess
    
    Returns:
    
    String Guessed syntax - or the default supplied
  - guessLang
```
public static String guessLang(String urlStr)
```
    Guess the language/type of model data
    - If the URI ends ".rdf", it is assumed to be RDF/XML
    - If the URI ends ".nt", it is assumed to be N-Triples
    - If the URI ends ".ttl", it is assumed to be Turtle
    - If the URI ends ".owl", it is assumed to be RDF/XML
    Parameters:
    
    urlStr - URL to base the guess on
    
    Returns:
    
    String Guessed syntax - default is RDF/XML
  - toFilename
```
public static String toFilename(String filenameOrURI)
```
    Turn a file: URL or file name into a plain file name
  - decodeFileName
```
public static String decodeFileName(String s)
```
  - toURL
```
@Deprecated
public static String toURL(String filename)
```
    Deprecated.
    
    Turn a plain filename into a "file:" URL Use IRILib.filenameToIRI This remains only for legacy compatibility.
  - isFile
```
public static boolean isFile(String name)
```
    Check whether 'name' is possibly a file reference
    
    Parameters:
    
    name -
    
    Returns:
    
    boolean False if clearly not a filename.
  - isURI
```
public static boolean isURI(String name)
```
    Check whether a name is an absolute URI (has a scheme name)
    
    Parameters:
    
    name -
    
    Returns:
    
    boolean True if there is a scheme name
  - getScheme
```
public static String getScheme(String uri)
```
  - getDirname
```
public static String getDirname(String filename)
```
    Get the directory part of a filename
    
    Parameters:
    
    filename -
    
    Returns:
    
    Directory name
  - getFilenameExt
```
public static String getFilenameExt(String filename)
```
    Get the suffix part of a file name or a URL in file-like format.
  - tempFileName
```
public static File tempFileName(String prefix,
                                String suffix)
```
    create a temporary file that will be deleted on exit, and do something sensible with any IO exceptions - namely, throw them up wrapped in a JenaException.
    
    Parameters:
    
    prefix - the prefix for File.createTempFile
    
    suffix - the suffix for File.createTempFile
    
    Returns:
    
    the temporary File
  - getScratchDirectory
```
public static File getScratchDirectory(String prefix)
```
    Answer a File naming a freshly-created directory in the temporary directory. This directory should be deleted on exit. TODO handle threading issues, mkdir failure, and better cleanup
    
    Parameters:
    
    prefix - the prefix for the directory name
    
    Returns:
    
    a File naming the new directory
  - getTempDirectory
```
public static String getTempDirectory()
```
  - openResourceFile
```
public static BufferedReader openResourceFile(String filename)
```
    Answer a BufferedReader than reads from the named resource file as UTF-8, possibly throwing WrappedIOExceptions.
  - openResourceFileAsStream
```
public static InputStream openResourceFileAsStream(String filename)
                                            throws FileNotFoundException
```
    Open an resource file for reading.
    
    Throws:
    
    FileNotFoundException
  - readerFromURL
```
public static BufferedReader readerFromURL(String urlStr)
```
  - readWholeFileAsUTF8
```
public static String readWholeFileAsUTF8(String filename)
                                  throws IOException
```
    Read a whole file as UTF-8
    
    Parameters:
    
    filename -
    
    Returns:
    
    String
    
    Throws:
    
    IOException
  - readWholeFileAsUTF8
```
public static String readWholeFileAsUTF8(InputStream in)
                                  throws IOException
```
    Read a whole stream as UTF-8
    
    Parameters:
    
    in - InputStream to be read
    
    Returns:
    
    String
    
    Throws:
    
    IOException

Class FileUtils

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

langXML

langXMLAbbrev

langNTriple

langN3

langTurtle

Constructor Detail

FileUtils

Method Detail

asUTF8

asBufferedUTF8

asUTF8

asPrintWriterUTF8

guessLang

guessLang

toFilename

decodeFileName

toURL

isFile

isURI

getScheme

getDirname

getFilenameExt

tempFileName

getScratchDirectory

getTempDirectory

openResourceFile

openResourceFileAsStream

readerFromURL

readWholeFileAsUTF8

readWholeFileAsUTF8