KeyExpressionFactory (EclipseLink 2.7.15, API Reference)

java.lang.Object
- org.eclipse.persistence.jpa.jpql.parser.ExpressionFactory
- - org.eclipse.persistence.jpa.jpql.parser.GeneralIdentificationExpressionFactory
  - - org.eclipse.persistence.jpa.jpql.parser.KeyExpressionFactory

All Implemented Interfaces:

java.lang.Comparable<ExpressionFactory>
```
public final class KeyExpressionFactory
extends GeneralIdentificationExpressionFactory
```
This KeyExpressionFactory creates a new KeyExpression when the portion of the query to parse starts with KEY.

Version:

2.4

See Also:

KeyExpression

Author:

Pascal Filion

Since:

2.3

Field Summary

Fields
Modifier and Type Field Description

static java.lang.String ID
The unique identifier of this KeyExpressionFactory.

Constructor Summary

Constructors
Constructor Description

KeyExpressionFactory()
Creates a new KeyExpressionFactory.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected AbstractExpression`	`buildExpression(AbstractExpression parent)`	Creates the actual expression this factory manages.

Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.GeneralIdentificationExpressionFactory
buildExpression

Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.ExpressionFactory
compareTo, equals, getExpressionRegistry, getId, hashCode, identifiers, toString

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - ID
```
public static final java.lang.String ID
```
    The unique identifier of this KeyExpressionFactory.
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - KeyExpressionFactory
```
public KeyExpressionFactory()
```
    Creates a new KeyExpressionFactory.
- Method Detail
  - buildExpression
```
protected AbstractExpression buildExpression(AbstractExpression parent)
```
    Creates the actual expression this factory manages.
    
    Specified by:
    
    buildExpression in class GeneralIdentificationExpressionFactory
    
    Parameters:
    
    parent - The parent of this expression
    
    Returns:
    
    The Expression this factory manages