Module org.eclipse.persistence.core

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

Class ExistsNode

java.lang.Object

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

org.eclipse.persistence.internal.jpa.parsing.ExistsNode

public class ExistsNode
extends Node

INTERNAL

Purpose: Represent an EXISTS subquery.

Field Summary

Fields inherited from class org.eclipse.persistence.internal.jpa.parsing.Node

alias, left, right, shouldGenerateExpression

Constructor Summary

Constructors

Constructor	Description
ExistsNode()	Return a new ExistsNode.

Method Summary

Modifier and Type	Method	Description
Expression	generateExpression(GenerationContext context)	INTERNAL Generate the EclipseLink expression for this node
void	indicateNot()	INTERNAL Indicate if a NOT was found in the WHERE clause.
boolean	notIndicated()
void	validate(ParseTreeContext context)	INTERNAL Validate node and calculate its type.

Methods inherited from class org.eclipse.persistence.internal.jpa.parsing.Node

addToExpression, appendExpression, applyToQuery, getAlias, getAsString, getColumn, getLeft, getLine, getRight, getType, hasLeft, hasRight, isAggregateNode, isAliasableNode, 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

Constructor Details

ExistsNode

public ExistsNode()

Return a new ExistsNode.

Method Details

validate

public void validate(ParseTreeContext context)

INTERNAL Validate node and calculate its type. Change subquery SELECT clause.

Overrides:

validate in class Node

generateExpression

public Expression generateExpression(GenerationContext context)

INTERNAL Generate the EclipseLink expression for this node

Overrides:

generateExpression in class Node

indicateNot

public void indicateNot()

INTERNAL Indicate if a NOT was found in the WHERE clause. Examples: WHERE ... NOT EXISTS(...)

notIndicated

public boolean notIndicated()