Package com.google.appengine.api.datastore

Class PreQueryContext

java.lang.Object

com.google.appengine.api.datastore.PreQueryContext

All Implemented Interfaces:

CallbackContext<Query>

public final class PreQueryContext
extends Object

Concrete CallbackContext implementation that is specific to intercepted queries. Methods annotated with PreQuery that receive instances of this class may modify the Query returned by calling CallbackContext.getCurrentElement(). This is an effective way to modify queries prior to execution.

Method Summary

Modifier and Type	Method	Description
Query	getCurrentElement()	Returns the element for which the callback has been invoked.
int	getCurrentIndex()	Returns the index in the result of CallbackContext.getElements() of the element for which the callback has been invoked.
Transaction	getCurrentTransaction()	Returns the current transaction, or null if there is no current transaction.
List<Query>	getElements()	Returns an unmodifiable view of the elements involved in the operation that triggered the callback..
String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Details

getElements

public List<Query> getElements()

Description copied from interface: CallbackContext

Returns an unmodifiable view of the elements involved in the operation that triggered the callback..

Specified by:

getElements in interface CallbackContext<T>

getCurrentTransaction

public Transaction getCurrentTransaction()

Description copied from interface: CallbackContext

Returns the current transaction, or null if there is no current transaction.

Specified by:

getCurrentTransaction in interface CallbackContext<T>

getCurrentIndex

public int getCurrentIndex()

Description copied from interface: CallbackContext

Returns the index in the result of CallbackContext.getElements() of the element for which the callback has been invoked.

Specified by:

getCurrentIndex in interface CallbackContext<T>

getCurrentElement

public Query getCurrentElement()

Description copied from interface: CallbackContext

Returns the element for which the callback has been invoked. Shortcut for getElements().getCurrentIndex().

Specified by:

getCurrentElement in interface CallbackContext<T>

toString

public String toString()

Overrides:

toString in class Object