org.appng.api.support

Class CallableDataSource

java.lang.Object

org.appng.api.support.CallableDataSource

public class CallableDataSource
extends Object

A CallableDataSource is responsible for preparing and performing an Datasource, based on a DatasourceRef. This DatasourceRef is provided either by a PageDefinition's SectionelementDef or by an Action.

Author:

Matthias Müller

Constructor Summary

Constructors

Constructor and Description
CallableDataSource(Site site, Application application, ApplicationRequest applicationRequest, ParameterSupport parameterSupport, DatasourceRef datasourceRef) Creates a new CallableDataSource and also determines the return value for doInclude(), based on Permissions and Conditions.

Method Summary

Modifier and Type	Method and Description
boolean	doInclude() Checks whether or not to include this CallableDataSource on the referencing PageReference or Action.
Datasource	getDatasource()
Data	perform(String pageId) Performs this CallableDataSource, setting the Bean null afterwards.
Data	perform(String pageId, boolean setBeanNull, boolean addValidation) Performs the CallableDataSource. Note that the caller needs to check if the Datasource should be included by itself (by calling doInclude()), as this method doesn't check that condition.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

CallableDataSource

public CallableDataSource(Site site,
                          Application application,
                          ApplicationRequest applicationRequest,
                          ParameterSupport parameterSupport,
                          DatasourceRef datasourceRef)
                   throws ProcessingException

Creates a new CallableDataSource and also determines the return value for doInclude(), based on Permissions and Conditions.

Parameters:

site - the current Site

application - the current Application

applicationRequest - the current ApplicationRequest

parameterSupport - the ParameterSupport holding the parameters for the Datasource

datasourceRef - the DatasourceRef as given in the SectionelementDef of a PageDefinition or by an Action.

Throws:

ProcessingException - if an error occurs while assembling the CallableDataSource

Method Detail

getDatasource

public Datasource getDatasource()

perform

public Data perform(String pageId)
             throws ProcessingException

Performs this CallableDataSource, setting the Bean null afterwards.

Throws:

ProcessingException

See Also:

perform(String, boolean, boolean)

perform

public Data perform(String pageId,
                    boolean setBeanNull,
                    boolean addValidation)
             throws ProcessingException

Performs the CallableDataSource.
Note that the caller needs to check if the Datasource should be included by itself (by calling doInclude()), as this method doesn't check that condition.

Parameters:

pageId - the ID of the current page

setBeanNull - whether or not to set the Bean of the Datasource to null after performing

addValidation - whether or not to add validation metadata

Returns:

the Data retrieved from the Datasource by calling DataProvider.getData(Site, Application, org.appng.api.Environment, Options, org.appng.api.Request, org.appng.api.FieldProcessor)

Throws:

ProcessingException - if an error occurs while retrieving the Data

doInclude

public boolean doInclude()

Checks whether or not to include this CallableDataSource on the referencing PageReference or Action.

Returns:

true if this CallableDataSource should be included, false otherwise

toString

public String toString()

Overrides:

toString in class Object