java.lang.Object
- com.google.appengine.api.datastore.PreGetContext

All Implemented Interfaces:

CallbackContext<Key>
```
public final class PreGetContext
extends Object
```
Concrete CallbackContext implementation that is specific to intercepted get() operations. Methods annotated with PreGet that receive instances of this class may modify the result of the get() operation by calling setResultForCurrentElement(Entity). Keys that receive results via this method will not be fetched from the datastore. This is an effective way to inject cached results.

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..
`void`	`setResultForCurrentElement(Entity entity)`	Set the `Entity` that will be associated with the `Key` returned by `CallbackContext.getCurrentElement()` in the result of the get() operation.
`String`	`toString()`

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

- Method Detail
  - setResultForCurrentElement
```
public void setResultForCurrentElement(Entity entity)
```
    Set the Entity that will be associated with the Key returned by CallbackContext.getCurrentElement() in the result of the get() operation. This will prevent the get() operation from fetching the Entity from the datastore. This is an effective way to inject cached results.
    
    Parameters:
    
    entity - The entity to provide as the result for the current element.
    
    Throws:
    
    IllegalArgumentException - If the key of the provided entity is not equal to the key returned by CallbackContext.getCurrentElement().
  - 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

Class PreGetContext

Method Summary

Methods inherited from class java.lang.Object

Method Detail

setResultForCurrentElement

getElements

getCurrentTransaction

getCurrentIndex

getCurrentElement

toString