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 java.lang.Object
Concrete CallbackContext
implementation that is specific to
intercepted queries. Methods annotated with that receive
instances of this class may modify the Query
returned by calling
getCurrentElement()
. This is an effective way to modify queries
prior to execution.
Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
getElements
public java.util.List<T> getElements()
- Specified by:
getElements
in interface CallbackContext<T>
- Returns:
- An unmodifiable view of the elements involved in the operation
that triggered the callback..
getCurrentTransaction
public Transaction getCurrentTransaction()
- Specified by:
getCurrentTransaction
in interface CallbackContext<T>
- Returns:
- The current transaction, or
null
if there is no current
transaction.
getCurrentIndex
public int getCurrentIndex()
- Specified by:
getCurrentIndex
in interface CallbackContext<T>
- Returns:
- The index in the result of
CallbackContext.getElements()
of the element
for which the callback has been invoked.
getCurrentElement
public T getCurrentElement()
- Specified by:
getCurrentElement
in interface CallbackContext<T>
- Returns:
- The element for which the callback has been invoked. Shortcut
for
getElements().getCurrentIndex()
.