PreQueryContext (AppEngine :: appengine-apis 2.0.14 API)

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

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`T`	`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<T>`	`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 Detail
  - getElements
```
public List<T> 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 T 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