org.apache.wiki.util
Class FileUtil

java.lang.Object
  org.apache.wiki.util.FileUtil

public final class FileUtil
extends Object

Generic utilities related to file and stream handling.

Method Summary

static void	copyContents(InputStream in, OutputStream out) Just copies all bytes from in to out.
static void	copyContents(Reader in, Writer out) Just copies all characters from in to out.
static String	getThrowingMethod(Throwable t) Returns the class and method name (+a line number) in which the Throwable was thrown.
static File	newTmpFile(String content) Creates a new temporary file using the default encoding of ISO-8859-1 (Latin1).
static File	newTmpFile(String content, String encoding) Makes a new temporary file and writes content into it.
static String	readContents(InputStream input, String encoding) Reads in file contents.
static String	readContents(Reader in) Returns the full contents of the Reader as a String.
static String	runSimpleCommand(String command, String directory) Runs a simple command in given directory.

Methods inherited from class java.lang.Object

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

Method Detail

newTmpFile

public static File newTmpFile(String content,
                              String encoding)
                       throws IOException

Makes a new temporary file and writes content into it. The temporary file is created using File.createTempFile(), and the usual semantics apply. The files are not deleted automatically in exit.

Parameters:

content - Initial content of the temporary file.

encoding - Encoding to use.

Returns:

The handle to the new temporary file

Throws:

IOException - If the content creation failed.

See Also:

File.createTempFile(String,String,File)

newTmpFile

public static File newTmpFile(String content)
                       throws IOException

Creates a new temporary file using the default encoding of ISO-8859-1 (Latin1).

Parameters:

content - The content to put into the file.

Returns:

A handle to the newly created file.

Throws:

IOException - If writing was unsuccessful.

See Also:

newTmpFile( String, String ), File.createTempFile(String,String,File)

runSimpleCommand

public static String runSimpleCommand(String command,
                                      String directory)
                               throws IOException,
                                      InterruptedException

Runs a simple command in given directory. The environment is inherited from the parent process (e.g. the one in which this Java VM runs).

Parameters:

command - The command to run

directory - The working directory to run the command in

Returns:

Standard output from the command.

Throws:

IOException - If the command failed

InterruptedException - If the command was halted

copyContents

public static void copyContents(Reader in,
                                Writer out)
                         throws IOException

Just copies all characters from in to out. The copying is performed using a buffer of bytes.

Parameters:

in - The reader to copy from

out - The reader to copy to

Throws:

IOException - If reading or writing failed.

Since:

1.5.8

copyContents

public static void copyContents(InputStream in,
                                OutputStream out)
                         throws IOException

Just copies all bytes from in to out. The copying is performed using a buffer of bytes.

Parameters:

in - The inputstream to copy from

out - The outputstream to copy to

Throws:

IOException - In case reading or writing fails.

Since:

1.9.31

readContents

public static String readContents(InputStream input,
                                  String encoding)
                           throws IOException

Reads in file contents.

This method is smart and falls back to ISO-8859-1 if the input stream does not seem to be in the specified encoding.

Parameters:

input - The InputStream to read from.

encoding - The encoding to assume at first.

Returns:

A String, interpreted in the "encoding", or, if it fails, in Latin1.

Throws:

IOException - If the stream cannot be read or the stream cannot be decoded (even) in Latin1

readContents

public static String readContents(Reader in)
                           throws IOException

Returns the full contents of the Reader as a String.

Parameters:

in - The reader from which the contents shall be read.

Returns:

String read from the Reader

Throws:

IOException - If reading fails.

Since:

1.5.8

getThrowingMethod

public static String getThrowingMethod(Throwable t)

Returns the class and method name (+a line number) in which the Throwable was thrown.

Parameters:

t - A Throwable to analyze.

Returns:

A human-readable string stating the class and method. Do not rely the format to be anything fixed.