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

Class EmptyCollectionComparisonNode

java.lang.Object

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

org.eclipse.persistence.internal.jpa.parsing.SimpleConditionalExpressionNode

org.eclipse.persistence.internal.jpa.parsing.EmptyCollectionComparisonNode

public class EmptyCollectionComparisonNode
extends SimpleConditionalExpressionNode

INTERNAL

Purpose: Used for the EMPTY collection handling

Responsibilities:

• Generate the correct expression for an IS EMPTY in EJBQL

Since:

August 2003

Author:

Jon Driscoll and Joel Lucuik

Field Summary

Fields

Modifier and Type	Field	Description
boolean	notIndicated

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

alias, left, right, shouldGenerateExpression

Constructor Summary

Constructors

Constructor	Description
EmptyCollectionComparisonNode()	EmptyCollectionComparisonNode constructor comment.

Method Summary

Modifier and Type	Method	Description
Expression	generateExpression(GenerationContext context)	INTERNAL Return a EclipseLink expression for this node.
void	indicateNot()	INTERNAL Indicate if a NOT was found in the WHERE clause.
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

Field Detail

notIndicated

public boolean notIndicated

Constructor Detail

EmptyCollectionComparisonNode

public EmptyCollectionComparisonNode()

EmptyCollectionComparisonNode constructor comment.

Method Detail

validate

public void validate(ParseTreeContext context)

INTERNAL Validate node and calculate its type.

Overrides:

validate in class Node

generateExpression

public Expression generateExpression(GenerationContext context)

INTERNAL Return a 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 emp.phoneNumbers IS NOT EMPTY