2.17.2: 2011-06-17

net.sf.basedb.clients.web.plugins
Class SimpleExport

java.lang.Object
  extended by net.sf.basedb.core.plugin.AbstractPlugin
      extended by net.sf.basedb.core.plugin.AbstractExporterPlugin
          extended by net.sf.basedb.clients.web.plugins.SimpleExport
All Implemented Interfaces:
ImmediateDownloadExporter, InteractivePlugin, NonRestartable, Plugin, SignalTarget

public class SimpleExport
extends AbstractExporterPlugin
implements InteractivePlugin, SignalTarget, NonRestartable

Export plugin for exporting data from table listings in the web client. This plugin only works from within the web client, since it depends on context and table information. It must have access to the current query which means that it always must be executed immediately, since queries can't be saved as parameters.

Version:
2.0
Author:
Nicklas
Last modified
$Date: 2010-11-08 14:49:35 +0100 (Mon, 08 Nov 2010) $

Nested Class Summary
 
Nested classes/interfaces inherited from interface net.sf.basedb.core.plugin.Plugin
Plugin.MainType
 
Field Summary
private static About about
          Plugin description
private static String COLUMN_PREFIX
           
private  RequestInformation configureJob
           
private  DbControl dc
           
private static String FORMAT
           
private static Set<GuiContext> guiContexts
           
private static String SAME_UNITS
           
private  ThreadSignalHandler signalHandler
           
private  String successMessage
           
private static String WHICH_ITEMS
           
private static String WHICH_PROPERTIES
           
 
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
SimpleExport()
           
 
Method Summary
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.
 void exportProperties(DbControl dc, ExportOutputStream out, String format, List<ExportedProperty> exportedProperties, Item itemType, Query query, ProgressReporter progress)
          Exports properties from a query to an output stream.
 About getAbout()
          Get information about the plugin, such as name, version, authors, etc.
private  PluginParameter<String> getColumnPrefixParameter()
           
private  RequestInformation getConfigureJobParameters(GuiContext context)
           
private  PluginParameter<String> getFormatParameter()
           
 Set<GuiContext> getGuiContexts()
          Get a set containing all items that the plugin handles.
 Plugin.MainType getMainType()
          Get the type of the plugin.
 RequestInformation getRequestInformation(GuiContext context, String command)
          This method will return the RequestInformation for a given command, i.e.
private  PluginParameter<Boolean> getSameUnitsParameter()
           
 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.
private  PluginParameter<String> getWhichItemsParameter()
           
private  PluginParameter<String> getWhichPropertiesParameter()
           
private  void initGuiContexts()
           
 String isInContext(GuiContext context, Object item)
          Check if the plugin can be used on the specified object.
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, getOverwrite, getOverwriteParameter, getSaveAsParameter, getSaveAsPath, getSaveTo, pathCanBeUsed, run
 
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.Plugin
done, getPermissions, init, run
 

Field Detail

about

private static final About about
Plugin description


guiContexts

private static final Set<GuiContext> guiContexts

configureJob

private RequestInformation configureJob

signalHandler

private ThreadSignalHandler signalHandler

dc

private DbControl dc

successMessage

private String successMessage

FORMAT

private static final String FORMAT
See Also:
Constant Field Values

WHICH_ITEMS

private static final String WHICH_ITEMS
See Also:
Constant Field Values

WHICH_PROPERTIES

private static final String WHICH_PROPERTIES
See Also:
Constant Field Values

COLUMN_PREFIX

private static final String COLUMN_PREFIX
See Also:
Constant Field Values

SAME_UNITS

private static final String SAME_UNITS
See Also:
Constant Field Values
Constructor Detail

SimpleExport

public SimpleExport()
Method Detail

getAbout

public About getAbout()
Description copied from interface: Plugin
Get information about the plugin, such as name, version, authors, etc.

Specified by:
getAbout in interface Plugin
Returns:
An About object

getMainType

public Plugin.MainType getMainType()
Description copied from interface: Plugin
Get the type of the plugin. This method must always return the same value.

Specified by:
getMainType in interface Plugin
Overrides:
getMainType in class AbstractExporterPlugin
Returns:
MainType.EXPORT

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

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)
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:
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

initGuiContexts

private void initGuiContexts()

getConfigureJobParameters

private RequestInformation getConfigureJobParameters(GuiContext context)

getFormatParameter

private PluginParameter<String> getFormatParameter()

getWhichItemsParameter

private PluginParameter<String> getWhichItemsParameter()

getWhichPropertiesParameter

private PluginParameter<String> getWhichPropertiesParameter()

getColumnPrefixParameter

private PluginParameter<String> getColumnPrefixParameter()

getSameUnitsParameter

private PluginParameter<Boolean> getSameUnitsParameter()

exportProperties

public void exportProperties(DbControl dc,
                             ExportOutputStream out,
                             String format,
                             List<ExportedProperty> exportedProperties,
                             Item itemType,
                             Query query,
                             ProgressReporter progress)
                      throws IOException
Exports properties from a query to an output stream. The export can be either tab-separated text or XML.

Parameters:
dc - The DbControl to use when accessing the database
out - Output stream to export to.
format - Use 'xml' to export in XML-format. All other inputs will give a tab-separated format.
exportedProperties - A list of which properties to include in the export.
itemType - Kind of item the export is about
query - This query is used to get the items to export.
progress - Optional progress reporter to get overview of how the export is proceeding.
Throws:
IOException - If anything goes wrong with export to the output stream.

2.17.2: 2011-06-17