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jpicedt.ui.util
Class SystemOutUtilities  

java.lang.Object
  jpicedt.ui.util.SystemOutUtilities

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public class SystemOutUtilities

extends java.lang.Object

A class that allow redirection of stderr and/or stdout to a log file. Invokation of this class must be done with "SystemOutUtilities.instance()" which return a reference to the singleton.

Since:

PicEdt 1.3

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Nested Class Summary
(package private)  class	SystemOutUtilities.ListenerThread           the watchdog thread that periodically listens to incoming error messages (currently set to 3") then writes them to file and/or to a JTextArea (see inner class SystemOutToFrame) kill it by setting "lt = null"
(package private)  class	SystemOutUtilities.SystemOutToFrame           A JDialog box which is used to display error message in a JTextPane or to a file.

 

Field Summary
private  java.io.BufferedReader	bufReader
private  int	currentRedir
private static boolean	DEBUG
private  boolean	displayDialog
static int	FILE           redirects stdout to a file named "jPicedtError.log"
private  SystemOutUtilities.ListenerThread	lt
private  java.io.PrintStream	newSystemOut
private  java.io.PrintStream	oldSystemErr
private  java.io.PrintStream	oldSystemOut
private static SystemOutUtilities	singleton
static int	STANDARD           doesn't redirect stdout to a file, i.e.
private  SystemOutUtilities.SystemOutToFrame	systemOutToFrameInstance
private  java.io.PrintStream	toFilePrintStream

 

Constructor Summary
private	SystemOutUtilities()           constructor is protected since the only way to access this class is by using SystemOutUtilities.instance()

 

Method Summary
void	displayDialog(boolean state)           Sets the "displayDialog" flag, i.e.
static java.lang.String	getErrorLogFile()           Return the path to error.log
static SystemOutUtilities	instance()           intanciates singleton if it's null, then returns it
void	redirect(int type)           Redirect to the stream of the given type
private  void	redirectSystemOutToFile()           Redirect System.out to a file named "jPicEdtError.log" located in user's home directory - displayDialog = false by default (i.e.
private  void	stopSystemOutToFileRedirection()           After a redirection to a pipe, sets back System.out and System.err to their default value

 

Methods inherited from class java.lang.Object

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

 

Field Detail

STANDARD

public static final int STANDARD

doesn't redirect stdout to a file, i.e. redirect to console ; instead open a frame and displays the error message in it

See Also:

Constant Field Values

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FILE

public static final int FILE

redirects stdout to a file named "jPicedtError.log"

See Also:

Constant Field Values

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DEBUG

private static final boolean DEBUG

See Also:

Constant Field Values

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singleton

private static SystemOutUtilities singleton

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currentRedir

private int currentRedir

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oldSystemOut

private java.io.PrintStream oldSystemOut

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newSystemOut

private java.io.PrintStream newSystemOut

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oldSystemErr

private java.io.PrintStream oldSystemErr

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bufReader

private java.io.BufferedReader bufReader

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toFilePrintStream

private java.io.PrintStream toFilePrintStream

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lt

private SystemOutUtilities.ListenerThread lt

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displayDialog

private boolean displayDialog

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systemOutToFrameInstance

private SystemOutUtilities.SystemOutToFrame systemOutToFrameInstance

Constructor Detail

SystemOutUtilities

private SystemOutUtilities()

constructor is protected since the only way to access this class is by using SystemOutUtilities.instance()

Method Detail

instance

public static SystemOutUtilities instance()

intanciates singleton if it's null, then returns it

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redirect

public void redirect(int type)

Redirect to the stream of the given type

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displayDialog

public void displayDialog(boolean state)

Sets the "displayDialog" flag, i.e. what must happen when an error message comes up and redir=FILE : do we open a JDialog or simply write the error message to the log file ? (obviously, calling this method if redir=STANDARD simply makes no sense)

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redirectSystemOutToFile

private void redirectSystemOutToFile()

Redirect System.out to a file named "jPicEdtError.log" located in user's home directory - displayDialog = false by default (i.e. no dialog box gets opened when an error message occurs) - we init "toFilePrintStream" so that it points to "user's setting dir/error.log" - we set System.out to this stream (redirection)

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getErrorLogFile

public static java.lang.String getErrorLogFile()

Return the path to error.log

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stopSystemOutToFileRedirection

private void stopSystemOutToFileRedirection()

After a redirection to a pipe, sets back System.out and System.err to their default value

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