Package net.sf.basedb.plugins

Class PackedFileExporter

java.lang.Object

net.sf.basedb.core.plugin.AbstractPlugin

net.sf.basedb.core.plugin.AbstractExporterPlugin

net.sf.basedb.plugins.PackedFileExporter

All Implemented Interfaces:

ImmediateDownloadExporter, InteractivePlugin, Plugin, SignalTarget

public class PackedFileExporter
extends AbstractExporterPlugin
implements InteractivePlugin, SignalTarget

Plug-in that packs one or more selected files and directories into a single file. The actual packing is performed by classes implementing the FilePacker interface. To add new formats, create a class that implements the interface and, register the new class with a PluginConfiguration item.

The compressed file can either be downloaded immediately to the local computer or stored into BASE's file system.

Version:

2.4

Author:

Martin, Nicklas

Last modified

$Date: 2007-07-11 15:45:01 +0200 (Mon, 02 Jul 2007) $

Nested Class Summary

Nested classes/interfaces inherited from interface net.sf.basedb.core.plugin.Plugin

Plugin.MainType

Field Summary

Fields

Modifier and Type	Field	Description
private RequestInformation	configureJob
private RequestInformation	configurePlugin
private DbControl	dc
private static final GuiContext	directoryGui
private static final GuiContext	fileGui
private static final Set<GuiContext>	guiContexts
private int	numFiles
private PluginParameter<String>	packerParameter
private static final Set<Permissions>	permissions
private PluginParameter<Boolean>	removeFilesParameter
private List<Integer>	selectedDirs
private List<Integer>	selectedFiles
private List<Nameable>	selectedFilesAndDirs
private ThreadSignalHandler	signalHandler
private long	totalBytes

Fields inherited from class net.sf.basedb.core.plugin.AbstractExporterPlugin

optionalSaveAsType, OVERWRITE, overwriteType, requiredSaveAsType, SAVE_AS

Fields inherited from class net.sf.basedb.core.plugin.AbstractPlugin

annotationSection, configuration, COPY_ANNOTATIONS, job, OVERWRITE_ANNOTATIONS, sc

Constructor Summary

Constructors

Constructor	Description
PackedFileExporter()	Create new instance.

Method Summary

Modifier and Type	Method	Description
protected void	begin(DbControl dc)	Called just before the export starts.
void	configure(GuiContext context, Request request, Response response)	Configure the plugin.
protected void	end(boolean success)	Called just after everything has been committed to the database, or immediately after an error has ocurred.
private String	generateDefaultName(FilePacker packer, Directory rootDir, Collection<Nameable> selectedItems)	Generate a default name without a path for the packed file.
private String	generateDefaultPath(FilePacker packer, Directory rootDir, Collection<Nameable> selectedItems)	Generate a default path for the packed file.
private RequestInformation	getConfigureJobParameters(GuiContext context, Boolean requireFile)
private RequestInformation	getConfigurePluginParameters()
Set<GuiContext>	getGuiContexts()	Get a set containing all items that the plugin handles.
private FilePacker	getPacker()	Get the FilePacker that has been configured in the current configuration.
private FilePacker	getPacker(String packerClass)	Create a FilePacker from the given class.
Collection<Permissions>	getPermissions()	Request create and delete access to File:s and Directory:s.
RequestInformation	getRequestInformation(GuiContext context, String command)	This method will return the RequestInformation for a given command, i.e.
SignalHandler	getSignalHandler()	Get the signal handler that is handling signals on behalf of this object.
protected String	getSuccessMessage()	Called if the export was successful to let the subclass generate a simple message that is sent back to the core and user interface.
String	isInContext(GuiContext context, Object item)	Check that at least one file or directory has been selected.
private void	loadFiles(DbControl dc, Collection<Nameable> loadedFiles, Directory directory)	Load files and subdirectories in the given directory.
private void	loadFilesAndDirectories(DbControl dc, Collection<Nameable> loadedFiles, Collection<Integer> files, Collection<Integer> directories, boolean recursive)	Load specified files and directories and put them in loadedFiles.
protected void	performExport(ExportOutputStream out, ProgressReporter progress)	Perform the export.
boolean	requiresConfiguration()	Returns FALSE, since that is how the plugins used to work before this method was introduced.
boolean	supportsConfigurations()	Returns TRUE, since that is how the plugins used to work before this method was introduced.

Methods inherited from class net.sf.basedb.core.plugin.AbstractExporterPlugin

doExport, getMainType, getOverwrite, getOverwriteParameter, getSaveAsParameter, getSaveAsPath, getSaveTo, pathCanBeUsed, run

Methods inherited from class net.sf.basedb.core.plugin.AbstractPlugin

cloneParameterWithDefaultValue, closeLogFile, createLogFile, done, getCopyAnnotationsParmeter, getCurrentConfiguration, getCurrentJob, getJobOrConfigurationValue, getOverwriteAnnotationsParameters, init, isLogging, log, log, storeValue, storeValue, storeValues, validateRequestParameters

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sf.basedb.core.plugin.Plugin

done, getMainType, init, run

Field Details

fileGui

private static final GuiContext fileGui

directoryGui

private static final GuiContext directoryGui

guiContexts

private static final Set<GuiContext> guiContexts

permissions

private static final Set<Permissions> permissions

configureJob

private RequestInformation configureJob

configurePlugin

private RequestInformation configurePlugin

removeFilesParameter

private PluginParameter<Boolean> removeFilesParameter

packerParameter

private PluginParameter<String> packerParameter

numFiles

private int numFiles

totalBytes

private long totalBytes

selectedFiles

private List<Integer> selectedFiles

selectedDirs

private List<Integer> selectedDirs

selectedFilesAndDirs

private List<Nameable> selectedFilesAndDirs

signalHandler

private ThreadSignalHandler signalHandler

dc

private DbControl dc

Constructor Details

PackedFileExporter

public PackedFileExporter()

Create new instance.

Method Details

supportsConfigurations

public boolean supportsConfigurations()

Description copied from class: AbstractPlugin

Returns TRUE, since that is how the plugins used to work before this method was introduced.

Specified by:

supportsConfigurations in interface Plugin

Overrides:

supportsConfigurations in class AbstractPlugin

Returns:

TRUE or FALSE

requiresConfiguration

public boolean requiresConfiguration()

Description copied from class: AbstractPlugin

Returns FALSE, since that is how the plugins used to work before this method was introduced.

Specified by:

requiresConfiguration in interface Plugin

Overrides:

requiresConfiguration in class AbstractPlugin

Returns:

TRUE or FALSE

getPermissions

public Collection<Permissions> getPermissions()

Request create and delete access to File:s and Directory:s.

Specified by:

getPermissions in interface Plugin

Overrides:

getPermissions in class AbstractPlugin

Returns:

A collection of permissions or null to not use permissions

getGuiContexts

public Set<GuiContext> getGuiContexts()

Description copied from interface: InteractivePlugin

Get a set containing all items that the plugin handles. Ie. if the plugin imports reporters, return a set containing Item.REPORTER. This information is used by client applications to put the plugin in the proper place in the user interface.

Specified by:

getGuiContexts in interface InteractivePlugin

Returns:

A Set containing Item:s, or null if the plugin is not concerned about items

isInContext

public String isInContext(GuiContext context,
 Object item)

Check that at least one file or directory has been selected.

Specified by:

isInContext in interface InteractivePlugin

Parameters:

context - The current context of the client application, it is one of the values found in set returned by InteractivePlugin.getGuiContexts()

item - The currently active item, it's type should match the GuiContext.getItem() type, or null if the context is a list context

Returns:

Null if the plugin can use that item, or a warning-level message explaining why the plugin can't be used

getRequestInformation

public RequestInformation getRequestInformation(GuiContext context,
 String command)
                                         throws BaseException

Description copied from interface: InteractivePlugin

This method will return the RequestInformation for a given command, i.e. the list of parameters and some nice help text.

Specified by:

getRequestInformation in interface InteractivePlugin

Parameters:

context - The current context of the client application, it is one of the values found in set returned by InteractivePlugin.getGuiContexts()

command - The command

Returns:

The RequestInformation for the command

Throws:

BaseException - if there is an error

configure

public void configure(GuiContext context,
 Request request,
 Response response)

Description copied from interface: InteractivePlugin

Configure the plugin. Hopefully the client is supplying values for the parameters specified by InteractivePlugin.getRequestInformation(GuiContext, String).

Specified by:

configure in interface InteractivePlugin

Parameters:

context - The current context of the client application, it is one of the values found in set returned by InteractivePlugin.getGuiContexts()

request - Request object with the command and parameters

response - Response object in for the plugin to response through

begin

protected void begin(DbControl dc)

Description copied from class: AbstractExporterPlugin

Called just before the export starts. A subclass may override this method if it needs to initialise some resources.

Overrides:

begin in class AbstractExporterPlugin

Parameters:

dc - The DbControl that is used to write to the database. A subclass may use this read from the database as well

See Also:

• AbstractExporterPlugin.end(boolean)

performExport

protected void performExport(ExportOutputStream out,
 ProgressReporter progress)
                      throws IOException

Description copied from class: AbstractExporterPlugin

Perform the export. This method replaces the ImmediateDownloadExporter.doExport(ExportOutputStream, ProgressReporter) method.

Specified by:

performExport in class AbstractExporterPlugin

Parameters:

out - Output stream to write the exported data to

progress - An optional progress reporter

Throws:

IOException

end

protected void end(boolean success)

Description copied from class: AbstractExporterPlugin

Called just after everything has been committed to the database, or immediately after an error has ocurred. A subclass should clean up any resources aquired in the AbstractExporterPlugin.begin(DbControl) method here.

Overrides:

end in class AbstractExporterPlugin

Parameters:

success - TRUE if the file was parsed successfully, FALSE otherwise

See Also:

• AbstractExporterPlugin.begin(DbControl)

getSuccessMessage

protected String getSuccessMessage()

Description copied from class: AbstractExporterPlugin

Called if the export was successful to let the subclass generate a simple message that is sent back to the core and user interface. An example message might by: 178 reporters exported successfully. The default implementation always return null.

Overrides:

getSuccessMessage in class AbstractExporterPlugin

getSignalHandler

public SignalHandler getSignalHandler()

Description copied from interface: SignalTarget

Get the signal handler that is handling signals on behalf of this object. Multiple invokations of this method may receive the same or different objects. Null may be returned if, for some reason, the current object instance doesn't want to receive signals. Returning null is the same as not implementing this interface.

Specified by:

getSignalHandler in interface SignalTarget

Returns:

A SignalHandler object, or null if the current instance doesn't support signals

getConfigureJobParameters

private RequestInformation getConfigureJobParameters(GuiContext context,
 Boolean requireFile)

getConfigurePluginParameters

private RequestInformation getConfigurePluginParameters()

loadFilesAndDirectories

private void loadFilesAndDirectories(DbControl dc,
 Collection<Nameable> loadedFiles,
 Collection<Integer> files,
 Collection<Integer> directories,
 boolean recursive)

Load specified files and directories and put them in loadedFiles. This method also calculates the total size of all files and stores it in totalBytes.

Parameters:

dc - The DbControl to use for loading

loadedFiles - The files and directories will be added to this collection

files - The ID of the files to load

directories - The ID of the directories to load

recursive - If we should recurse into subdirectories or not

loadFiles

private void loadFiles(DbControl dc,
 Collection<Nameable> loadedFiles,
 Directory directory)

Load files and subdirectories in the given directory.

Parameters:

dc - The DbControl to use for loading

loadedFiles - The files and directories will be added to this collection

directory - The parent directory

getPacker

private FilePacker getPacker()

Get the FilePacker that has been configured in the current configuration.

getPacker

private FilePacker getPacker(String packerClass)
                      throws Exception

Create a FilePacker from the given class.

Parameters:

packerClass - The class name of a class that implements FilePacker

Throws:

Exception

generateDefaultPath

private String generateDefaultPath(FilePacker packer,
 Directory rootDir,
 Collection<Nameable> selectedItems)

Generate a default path for the packed file. If the selection contains only one file or directory, the name of that item is used, otherwise the name of the root directory is used. The file extension from FilePacker.getFileExtension() is automatically appeneded.

Parameters:

packer - The current FilePacker

rootDir - The root directory

selectedItems - The selected items (not including subdirectories)

generateDefaultName

private String generateDefaultName(FilePacker packer,
 Directory rootDir,
 Collection<Nameable> selectedItems)

Generate a default name without a path for the packed file.

See Also:

• generateDefaultPath(FilePacker, Directory, Collection)