net.sf.basedb.plugins.executor
Class AbstractIOSupport

java.lang.Object
  net.sf.basedb.core.plugin.AbstractPlugin
      net.sf.basedb.plugins.executor.AbstractIOSupport

All Implemented Interfaces:

InteractivePlugin, Plugin, IOSupport

Direct Known Subclasses:

BaseFileExporterSupport, BaseFileImporterSupport, BfsExporterSupport, BfsImporterSupport, FileOnlyImporterSupport

public abstract class AbstractIOSupport
extends AbstractPlugin
implements IOSupport

Abstract base class that is useful for plug-ins that need to implement the IOSupport interface and don't want to be visible as standalone plug-ins.

Since:

2.15

Author:

nicklas

See Also:

ExternalProgramExecutor

Last modified

$Date $

Nested Class Summary

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

Plugin.MainType

Field Summary

private ExternalProgramExecutor

executor

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

annotationSection, configuration, COPY_ANNOTATIONS, job, OVERWRITE_ANNOTATIONS, sc

Fields inherited from interface net.sf.basedb.plugins.executor.IOSupport

COMMAND_CONFIGURE_IO_JOB, COMMAND_CONFIGURE_IO_PLUGIN, COMMAND_EXECUTE_IO_JOB

Constructor Summary

AbstractIOSupport()

Method Summary

protected ExternalProgramExecutor	getExecutor() Get the external program executor that invoked the plug-in.
Set<GuiContext>	getGuiContexts() Get a set containing all items that the plugin handles.
String	getShortName() A default implementation to maintain backwards compatibility.
void	init(SessionControl sc, ParameterValues configuration, ParameterValues job, ExternalProgramExecutor executor) Replaces the regular plug-in initialisation method.
String	isInContext(GuiContext context, Object item) Check if the plugin can be used on the specified object.
protected abstract String	performIO(DbControl dc, ProgressReporter progress) Perform the IO operation.
boolean	requiresConfiguration() Returns FALSE, since that is how the plugins used to work before this method was introduced.
void	run(Request request, Response response, ProgressReporter progress) Accepts the IOSupport.COMMAND_EXECUTE_IO_JOB command.
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.AbstractPlugin

checkInterrupted, cloneParameterWithDefaultValue, closeLogFile, createLogFile, done, getCopyAnnotationsParmeter, getCurrentConfiguration, getCurrentJob, getJobOrConfigurationValue, getOverwriteAnnotationsParameters, getPermissions, init, 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.InteractivePlugin

configure, getRequestInformation

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

done, getAbout, getMainType, getPermissions, init

Field Detail

executor

private ExternalProgramExecutor executor

Constructor Detail

AbstractIOSupport

public AbstractIOSupport()

Method Detail

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:

Always 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:

Always FALSE

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:

Always null

isInContext

public String isInContext(GuiContext context,
                          Object item)

Description copied from interface: InteractivePlugin

Check if the plugin can be used on the specified object. The item is either a BasicItem or BasicData object, or null if called from a list context. A client application should only call this method for contexts matching one of the contexts in the set returned by the InteractivePlugin.getGuiContexts() method. For GuiContext.Type.ITEM contexts an item of the correct type should be passed as a parameter.

The plug-in can response with a null value indicating success, a warning-level message or throw an exception to indicate an error-level message. Client application should normally only show error-level messages to users, unless the user has requested to see warning messages.

NOTE! Before BASE 2.4 all messages were treated as error-level messages.

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:

Always null

run

public void run(Request request,
                Response response,
                ProgressReporter progress)

Accepts the IOSupport.COMMAND_EXECUTE_IO_JOB command. The default implementation starts a new transaction and then calls performIO(DbControl, ProgressReporter) which should be implemented by the subclass.

Specified by:

run in interface Plugin

Parameters:

request - Request object with the command and parameters

response - Response object in for the plugin to response through

progress - A ProgressReporter where the plugin can report its progess, can be null

getShortName

public String getShortName()

A default implementation to maintain backwards compatibility. Plug-ins that want to return a different short name should override this method.

Specified by:

getShortName in interface IOSupport

Returns:

The name of the plugin (eg. getAbout().getName())

Since:

2.16

init

public void init(SessionControl sc,
                 ParameterValues configuration,
                 ParameterValues job,
                 ExternalProgramExecutor executor)

Description copied from interface: IOSupport

Replaces the regular plug-in initialisation method. When the plug-in is used as part of the external executor this method is used instead of Plugin.init(SessionControl, ParameterValues, ParameterValues).

Specified by:

init in interface IOSupport

executor - The external executor plug-in

performIO

protected abstract String performIO(DbControl dc,
                                    ProgressReporter progress)
                             throws IOException

Perform the IO operation.

Parameters:

dc - A DbControl that can be used by the subclass

progress - An optional progress reporter

Returns:

A message that is returned as to the external program executor

Throws:

IOException

getExecutor

protected ExternalProgramExecutor getExecutor()

Get the external program executor that invoked the plug-in.