MapKeyNode (EclipseLink Core 3.0.3-RC1 API)

java.lang.Object
- org.eclipse.persistence.internal.jpa.parsing.Node
- - org.eclipse.persistence.internal.jpa.parsing.MapKeyNode

All Implemented Interfaces:

AliasableNode
```
public class MapKeyNode
extends Node
implements AliasableNode
```
INTERNAL
Purpose: Represent an KEY in EJBQL
Responsibilities:
- Generate the correct expression for an KEY in EJBQL
Since:

EclipseLink 1.2

Author:

tware

Field Summary
- Fields inherited from class org.eclipse.persistence.internal.jpa.parsing.Node
  alias, left, right, shouldGenerateExpression

Constructor Summary

Constructors
Constructor Description

MapKeyNode()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`applyToQuery(ObjectLevelReadQuery theQuery, GenerationContext generationContext)`	INTERNAL Apply this node to the passed query
`Expression`	`generateExpression(GenerationContext context)`	INTERNAL Generate the a new EclipseLink TableEntryExpression for this node.
`Node`	`getLeftMostNode()`	INTERNAL Return the left most node of a dot expr, so return 'a' for 'a.b.c'.
`boolean`	`isAliasableNode()`
`boolean`	`isMapKeyNode()`	INTERNAL Is this node a MapKey node
`void`	`validate(ParseTreeContext context)`	INTERNAL Validate node and calculate its type.

Methods inherited from class org.eclipse.persistence.internal.jpa.parsing.Node
addToExpression, appendExpression, getAlias, getAsString, getColumn, getLeft, getLine, getRight, getType, hasLeft, hasRight, isAggregateNode, isAttributeNode, isConstructorNode, isCountNode, isDivideNode, isDotNode, isEscape, isLiteralNode, isMinusNode, isMultiplyNode, isNotNode, isParameterNode, isPlusNode, isSubqueryNode, isVariableNode, qualifyAttributeAccess, resolveAttribute, resolveClass, resolveClass, resolveMapping, resolveMapping, setAlias, setColumn, setLeft, setLine, setRight, setType, toString, toString, toStringDisplayName, toStringIndent, validateParameter

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

Methods inherited from interface org.eclipse.persistence.internal.jpa.parsing.AliasableNode
getAlias, setAlias

- Constructor Detail
  - MapKeyNode
```
public MapKeyNode()
```
- Method Detail
  - isMapKeyNode
```
public boolean isMapKeyNode()
```
    INTERNAL Is this node a MapKey node
    
    Overrides:
    
    isMapKeyNode in class Node
  - applyToQuery
```
public void applyToQuery(ObjectLevelReadQuery theQuery,
                         GenerationContext generationContext)
```
    INTERNAL Apply this node to the passed query
    
    Overrides:
    
    applyToQuery in class Node
  - generateExpression
```
public Expression generateExpression(GenerationContext context)
```
    INTERNAL Generate the a new EclipseLink TableEntryExpression for this node.
    
    Overrides:
    
    generateExpression in class Node
  - getLeftMostNode
```
public Node getLeftMostNode()
```
    INTERNAL Return the left most node of a dot expr, so return 'a' for 'a.b.c'.
  - validate
```
public void validate(ParseTreeContext context)
```
    Description copied from class: Node
    
    INTERNAL Validate node and calculate its type.
    
    Overrides:
    
    validate in class Node
  - isAliasableNode
```
public boolean isAliasableNode()
```
    Overrides:
    
    isAliasableNode in class Node