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PreQueryContext (Google App Engine API for Java)

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 PreQuery 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.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`T`	`getCurrentElement()`
`int`	`getCurrentIndex()`
`Transaction`	`getCurrentTransaction()`
`java.util.List<T>`	`getElements()`
`java.lang.String`	`toString()`

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Method Detail
  - 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().
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object

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Last updated 2025-06-16 UTC.

PreQueryContext (Google App Engine API for Java)

Class PreQueryContext

Method Summary

Methods inherited from class java.lang.Object

Method Detail

getElements

getCurrentTransaction

getCurrentIndex

getCurrentElement

toString