org.argouml.persistence
Class AbstractFilePersister

java.lang.Object
  javax.swing.filechooser.FileFilter
      org.argouml.persistence.AbstractFilePersister

All Implemented Interfaces:

ProjectFilePersister

Direct Known Subclasses:

UmlFilePersister, XmiFilePersister

public abstract class AbstractFilePersister

extends FileFilter

implements ProjectFilePersister

To persist to and from zargo (zipped file) storage.

AbstractFilePersister

public AbstractFilePersister()

getEncoding

protected String getEncoding()

Supply the encoding to be used throughout the persistence mechanism.

Returns:

the encoding.

createTempFile

protected File createTempFile(File file)
                       throws FileNotFoundException,
                              IOException

Create a temporary copy of the existing file.

Parameters:

file - the file to copy.

Returns:

the temp file or null if none copied.

Throws:

FileNotFoundException - if file not found

IOException - if error reading or writing

copyFile

protected File copyFile(File src,
                        File dest)
                 throws FileNotFoundException,
                        IOException

Copies one file src to another, raising file exceptions if there are some problems.

Parameters:

dest - The destination file.

src - The source file.

Returns:

The destination file after successful copying.

Throws:

IOException - if there is some problems with the files.

FileNotFoundException - if any of the files cannot be found.

accept

public boolean accept(File f)

See Also:

FileFilter.accept(java.io.File)

getExtension

public abstract String getExtension()

The extension valid for this type of file. (Just the chars, not the dot: e.g. "zargo".)

Returns:

the extension valid for this type of file

getDesc

protected abstract String getDesc()

Just the description, not the extension between "()".

Returns:

the description valid for this type of file

isFileExtensionApplicable

public boolean isFileExtensionApplicable(String filename)

Given the full filename this returns true if that filename contains the expected extension for the is persister.

Parameters:

filename - The filename to test.

Returns:

true if the filename is valid for this persister

getDescription

public String getDescription()

See Also:

FileFilter.getDescription()

save

public final void save(Project project,
                       File file)
                throws SaveException

Save a project to file.

This first archives the existing file, then calls doSave(...) to do the actual saving.

Should doSave(...) throw an exception then it is caught here and any rollback handled before rethrowing the exception.

Specified by:

save in interface ProjectFilePersister

Parameters:

project - The project being saved.

file - The file to which the save is taking place.

Throws:

SaveException - when anything goes wrong

See Also:

ProjectFilePersister.save( org.argouml.kernel.Project, java.io.File)

doSave

protected abstract void doSave(Project project,
                               File file)
                        throws SaveException

Implement in your concrete class to save a project to a file.

There is no need to worry about archiving or restoring archive on failure, that is handled by the rest of the framework.

Parameters:

project - the project to save

file - The file to write.

Throws:

SaveException - when anything goes wrong

See Also:

save( org.argouml.kernel.Project, java.io.File)

doLoad

public abstract Project doLoad(File file)
                        throws OpenException

Specified by:

doLoad in interface ProjectFilePersister

Parameters:

file - the file of the project to load.

Returns:

the Project

Throws:

OpenException - when we fail to open from this url

See Also:

ProjectFilePersister.doLoad(java.io.File)

fireProgressEvent

protected void fireProgressEvent(long percent)

Inform listeners of any progress notifications.

Parameters:

percent - the current percentage progress.

addProgressListener

public void addProgressListener(ProgressListener listener)

Add any object interested in listening to persistence progress.

Parameters:

listener - the interested listener.

removeProgressListener

public void removeProgressListener(ProgressListener listener)

Remove any object no longer interested in listening to persistence progress.

Parameters:

listener - the listener to remove.

hasAnIcon

public abstract boolean hasAnIcon()

Returns true if a FileChooser should visualize an icon for the persister.

Returns:

true if the persister is associated to an icon