org.wurbelizer
Class SourceFile

java.lang.Object
  org.wurbelizer.SourceFile

public class SourceFile
extends Object

In-memory file to check for changes before close/flush. Manages a static set of such SourceFiles that can be closed and thus released at one (meant to be attached to a single SourceDocument).

Method Summary

void	close() Closes the file.
static void	closeAll() Closes all files and clears the vector
void	flush() Flushs the file (overwrite existing file or create a new one).
String	getNewText() Gets the new text/contents of the file.
String	getOrgText() Gets the original text (contents) of the file.
PrintStream	getStream() Gets a stream for the file to be rewritten.
static void	initialize() Discard all files in list, if any.
boolean	needsFlush() Checks whether the file is changed and needs a flush for persistance.
static SourceFile	open(String filename) Opens the file and load into memory.
static void	resetAll() Rewinds all output streams (makes them empty again).

Methods inherited from class java.lang.Object

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

Method Detail

open

public static SourceFile open(String filename)
                       throws IOException

Opens the file and load into memory.

Parameters:

filename - the filename

Returns:

the open file

Throws:

IOException - if reading the file did fail

getOrgText

public String getOrgText()

Gets the original text (contents) of the file.

Returns:

the original text, null = no such file

getStream

public PrintStream getStream()

Gets a stream for the file to be rewritten. This will only create a memory stream for appending data. It does not physically write to the file!

Returns:

the open stream

getNewText

public String getNewText()

Gets the new text/contents of the file.

Returns:

the new (changed) contents, null = no getStream() invoked.

needsFlush

public boolean needsFlush()

Checks whether the file is changed and needs a flush for persistance.

Returns:

true if newText differs from oldText

flush

public void flush()
           throws FileNotFoundException,
                  IOException

Flushs the file (overwrite existing file or create a new one).

Throws:

FileNotFoundException - if file cannpt be created

IOException - if flush failed

close

public void close()
           throws FileNotFoundException,
                  IOException

Closes the file. Will flush if necessary.

Throws:

FileNotFoundException - if file cannpt be created

IOException - if flush failed

initialize

public static void initialize()

Discard all files in list, if any.

resetAll

public static void resetAll()

Rewinds all output streams (makes them empty again).

closeAll

public static void closeAll()
                     throws FileNotFoundException,
                            IOException

Closes all files and clears the vector

Throws:

FileNotFoundException

IOException