Package org.eclipse.epsilon.common.dt.console

Class MirrorPrintStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

java.io.PrintStream

org.eclipse.epsilon.common.dt.console.MirrorPrintStream

All Implemented Interfaces:

Closeable, Flushable, Appendable, AutoCloseable

public class MirrorPrintStream
extends PrintStream

MirrorPrintStream is a PrintStream that mirrors all print/write operations into a file. Only the write(), check() and close() methods need overriding given that any of the print() and println() methods must go through these.

Since:

1.6

Author:

Horacio Hoyos Rodriguez

Field Summary

Fields

Modifier and Type	Field	Description
protected String	fileName	The file name.
protected PrintStream	fileStream	The file stream.

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Constructors

Constructor	Description
MirrorPrintStream(OutputStream os)	Instantiates a MirrorPrintStream with autoflush.
MirrorPrintStream(OutputStream os, boolean flush)

Method Summary

Modifier and Type	Method	Description
boolean	checkError()	Return true if either stream has an error.
protected void	clearError()	Clears the internal error state of this stream.
void	close()
void	disableMirror()	Disable the mirror operation.
void	flush()
void	mirrorToFile(String fileName)	Enable mirroring to the given file.
void	mirrorToFile(String fileName, boolean append)	Enable mirroring to the given file.
protected void	setError()	Sets the error state of the stream to true.
void	write(byte[] x, int o, int l)
void	write(int x)

Methods inherited from class java.io.PrintStream

append, append, append, format, format, print, print, print, print, print, print, print, print, print, printf, printf, println, println, println, println, println, println, println, println, println, println, write, writeBytes

Methods inherited from class java.io.OutputStream

nullOutputStream

Methods inherited from class java.lang.Object

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

Field Details

fileStream

protected PrintStream fileStream

The file stream.

fileName

protected String fileName

The file name.

Constructor Details

MirrorPrintStream

public MirrorPrintStream(OutputStream os,
 boolean flush)

MirrorPrintStream

public MirrorPrintStream(OutputStream os)

Instantiates a MirrorPrintStream with autoflush.

Parameters:

os - the os

Method Details

checkError

public boolean checkError()

Return true if either stream has an error.

Overrides:

checkError in class PrintStream

write

public void write(int x)

Overrides:

write in class PrintStream

write

public void write(byte[] x,
 int o,
 int l)

Overrides:

write in class PrintStream

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class PrintStream

flush

public void flush()

Specified by:

flush in interface Flushable

Overrides:

flush in class PrintStream

mirrorToFile

public void mirrorToFile(String fileName)

Enable mirroring to the given file. If there is an error the MirrorPrintStream will be flagged as having an error. By default bytes will be written to the beginning of the file

Parameters:

fileName - The name of the file to direct output.

See Also:

• mirrorToFile(String, boolean)

mirrorToFile

public void mirrorToFile(String fileName,
 boolean append)

Enable mirroring to the given file. If there is an error the MirrorPrintStream will be flagged as having an error.

Parameters:

fileName - The name of the file to direct output.

append - if true, then bytes will be written to the end of the file rather than the beginning

disableMirror

public void disableMirror()

Disable the mirror operation.

setError

protected void setError()

Sets the error state of the stream to true.

This method will cause subsequent invocations of checkError() to return true until clearError() is invoked.

Overrides:

setError in class PrintStream

clearError

protected void clearError()

Clears the internal error state of this stream.

This method will cause subsequent invocations of checkError() to return false until another write operation fails and invokes setError().

Overrides:

clearError in class PrintStream