uk.ac.essex.common.io
Class FileOpImpl<T extends ApplicationFile>

java.lang.Object
  uk.ac.essex.common.io.FileOp<T>
      uk.ac.essex.common.io.FileOpImpl<T>

Direct Known Subclasses:

ImageFileOp, OperationFileOp

public abstract class FileOpImpl<T extends ApplicationFile>
extends FileOp<T>

A default implementation of a FileOp that provides implementations that use a JFileChooser to obtain the file the user wants to open/save. This can be a custom file chosser if necessary
Date: 15-Jul-2002

Field Summary

protected java.awt.Component	currentCaller
protected javax.swing.JFileChooser	fileChooser The file fileChooser
static java.lang.String	LAST_DIR
protected java.io.File	lastDir

Fields inherited from class uk.ac.essex.common.io.FileOp

file

Constructor Summary

FileOpImpl()
The file fileChooser is just a plain old JFileChooser.

FileOpImpl(javax.swing.JFileChooser chooser)
Sets the file fileChooser to be whatever you want

Method Summary

abstract java.lang.String	getDefaultEnding() Gets the default file ending to postfix to the file name, this is only used if the file to save to has not been given by the user.
javax.swing.JFileChooser	getFileChooser()
protected boolean	hasEnding(java.io.File f)
T	open(java.awt.Component caller) Open an operation from disk.
abstract T	openFile(java.io.File file)
boolean	saveAs(T applicationFile, java.awt.Component caller) Save a given app file under a new name/file.
void	setFileChooser(javax.swing.JFileChooser fileChooser)

Methods inherited from class uk.ac.essex.common.io.FileOp

getFile, save

Methods inherited from class java.lang.Object

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

Field Detail

LAST_DIR

public static final java.lang.String LAST_DIR

See Also:

Constant Field Values

fileChooser

protected javax.swing.JFileChooser fileChooser

The file fileChooser

lastDir

protected java.io.File lastDir

currentCaller

protected java.awt.Component currentCaller

Constructor Detail

FileOpImpl

public FileOpImpl()

The file fileChooser is just a plain old JFileChooser.

FileOpImpl

public FileOpImpl(javax.swing.JFileChooser chooser)

Sets the file fileChooser to be whatever you want

Parameters:

chooser -

Method Detail

getDefaultEnding

public abstract java.lang.String getDefaultEnding()

Gets the default file ending to postfix to the file name, this is only used if the file to save to has not been given by the user.

Returns:

String - The default file ending to postfix to the file name

openFile

public abstract T openFile(java.io.File file)

Parameters:

file -

getFileChooser

public javax.swing.JFileChooser getFileChooser()

Returns:

JFileChooser - the file fileChooser being used

setFileChooser

public void setFileChooser(javax.swing.JFileChooser fileChooser)

Parameters:

fileChooser - - The file fileChooser to use to get the required File from the user

open

public T open(java.awt.Component caller)

Open an operation from disk. Shows a dialog so users can choose the file to open. The object returned can be casted to the type OperationGraph.

Specified by:

open in class FileOp<T extends ApplicationFile>

Parameters:

caller - - The parent Component of the file fileChooser dialog

Returns:

the OperationGraph selected

See Also:

openFile(java.io.File)

saveAs

public boolean saveAs(T applicationFile,
                      java.awt.Component caller)

Save a given app file under a new name/file. Users are presented with a file fileChooser dialog so they can select where to save the file. If the file is choosen, then this just calls FileOp.save(T) to do the actual saving of the file.

Specified by:

saveAs in class FileOp<T extends ApplicationFile>

Parameters:

applicationFile - - The file to save

caller - - The parent Component of the file fileChooser dialog

Returns:

boolean - true if the file saved ok, false otherwise

See Also:

FileOp.save(T)

hasEnding

protected boolean hasEnding(java.io.File f)

Parameters:

f - - The file whose name to check

Returns:

true if the file has an ending ie/ '.XXX', false otherwise