Package org.eclipse.persistence.internal.jpa.parsing

Class NullIfNode

java.lang.Object

org.eclipse.persistence.internal.jpa.parsing.Node

org.eclipse.persistence.internal.jpa.parsing.NullIfNode

All Implemented Interfaces:

AliasableNode

public class NullIfNode
extends Node
implements AliasableNode

INTERNAL

Purpose: Represent an NULLIF in EJBQL

Responsibilities:

• Generate the correct expression for an NULLIF 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
NullIfNode()

Method Summary

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 NullIf expression for this node.
boolean	isAliasableNode()
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, isMapKeyNode, 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

NullIfNode

public NullIfNode()

Method Detail

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 NullIf expression for this node.

Overrides:

generateExpression in class Node

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