uk.org.arlott.simon.hw.f24.lbsta
Class JavaWSFileHandler

java.lang.Object
  uk.org.arlott.simon.hw.f24.lbsta.JavaWSFileHandler

All Implemented Interfaces:

java.lang.Runnable, FileHandler

public class JavaWSFileHandler
extends java.lang.Object
implements FileHandler, java.lang.Runnable

The JavaWSFileHandler implements the FileHandler interface to provide methods for loading and saving to a file. The purpose is to allow files to be handled when run under Java Web Start.

Field Summary

private java.lang.Exception	failed Exception set if the writing fails.
private java.io.PipedInputStream	in The processed data file read end of the pipe.
private java.io.PipedOutputStream	out The processed data file write end of the pipe.
private javax.xml.transform.stream.StreamResult	result The result of the data reprocessing.
private FileContents	saved The last saved file.
private javax.xml.transform.dom.DOMSource	source The input data.
private java.lang.Thread	t A thread used to manage writing to the file, because the data processing operation cannot be performed in a single thread.
private javax.xml.transform.Transformer	transformer The transformer used to reprocess the data into an XML file.

Constructor Summary

JavaWSFileHandler()

Method Summary

org.w3c.dom.Document	open(java.awt.Component parent) Open a file and read its data.
void	reset() Reset the last saved file information.
void	run() Thread data process run method.
boolean	save(java.awt.Component parent, org.w3c.dom.Document data, boolean saveAs) Save data to a file.

Methods inherited from class java.lang.Object

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

Field Detail

saved

private FileContents saved

The last saved file.

t

private java.lang.Thread t

A thread used to manage writing to the file, because the data processing operation cannot be performed in a single thread.

failed

private java.lang.Exception failed

Exception set if the writing fails.

in

private java.io.PipedInputStream in

The processed data file read end of the pipe.

out

private java.io.PipedOutputStream out

The processed data file write end of the pipe.

result

private javax.xml.transform.stream.StreamResult result

The result of the data reprocessing.

transformer

private javax.xml.transform.Transformer transformer

The transformer used to reprocess the data into an XML file.

source

private javax.xml.transform.dom.DOMSource source

The input data.

Constructor Detail

JavaWSFileHandler

public JavaWSFileHandler()

Method Detail

reset

public void reset()

Reset the last saved file information.

Specified by:

reset in interface FileHandler

open

public org.w3c.dom.Document open(java.awt.Component parent)
                          throws FileHandlerException

Open a file and read its data.

Specified by:

open in interface FileHandler

Parameters:

parent - The parent Component for dialogs and prompts.

Returns:

A Document containing the file data.

Throws:

FileHandlerException - If there was a problem opening the file.

save

public boolean save(java.awt.Component parent,
                    org.w3c.dom.Document data,
                    boolean saveAs)
             throws FileHandlerException

Save data to a file.

Specified by:

save in interface FileHandler

Parameters:

parent - The parent Component for dialogs and prompts.

data - A Document containing the file data.

saveAs - Set true to use the "save as" mode.

Returns:

true if the file was saved successfully.

Throws:

FileHandlerException - If there was a problem saving the file.

run

public void run()

Thread data process run method.

Specified by:

run in interface java.lang.Runnable