Module org.eclipse.persistence.core

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

Class AggregateNode

java.lang.Object

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

org.eclipse.persistence.internal.jpa.parsing.AggregateNode

All Implemented Interfaces:

AliasableNode

Direct Known Subclasses:

AvgNode, CountNode, MaxNode, MinNode, SumNode

public abstract class AggregateNode
extends Node
implements AliasableNode

INTERNAL

Purpose: Superclass for Aggregate Nodes

Responsibilities:

• Apply itself to a query correctly

Since:

TopLink 5.0

Field Summary

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

alias, left, right, shouldGenerateExpression

Constructor Summary

Constructors

Constructor	Description
AggregateNode()

Method Summary

Modifier and Type	Method	Description
protected abstract Expression	addAggregateExression(Expression expr)	INTERNAL
Expression	generateExpression(GenerationContext context)	INTERNAL Return a EclipseLink expression generated using the left node
boolean	isAggregateNode()	INTERNAL Is this node an Aggregate node
boolean	isAliasableNode()
String	resolveAttribute()	INTERNAL
Class<?>	resolveClass(GenerationContext context)	resolveClass: Answer the class associated with my left node.
void	setDistinct(boolean distinct)
boolean	usesDistinct()

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

addToExpression, appendExpression, applyToQuery, getAlias, getAsString, getColumn, getLeft, getLine, getRight, getType, hasLeft, hasRight, isAttributeNode, isConstructorNode, isCountNode, isDivideNode, isDotNode, isEscape, isLiteralNode, isMapKeyNode, isMinusNode, isMultiplyNode, isNotNode, isParameterNode, isPlusNode, isSubqueryNode, isVariableNode, qualifyAttributeAccess, resolveClass, resolveMapping, resolveMapping, setAlias, setColumn, setLeft, setLine, setRight, setType, toString, toString, toStringDisplayName, toStringIndent, validate, 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 Details

AggregateNode

public AggregateNode()

Method Details

resolveAttribute

public String resolveAttribute()

INTERNAL

Overrides:

resolveAttribute in class Node

resolveClass

public Class<?> resolveClass(GenerationContext context)

resolveClass: Answer the class associated with my left node.

Overrides:

resolveClass in class Node

isAggregateNode

public boolean isAggregateNode()

INTERNAL Is this node an Aggregate node

Overrides:

isAggregateNode in class Node

usesDistinct

public boolean usesDistinct()

setDistinct

public void setDistinct(boolean distinct)

generateExpression

public Expression generateExpression(GenerationContext context)

INTERNAL Return a EclipseLink expression generated using the left node

Overrides:

generateExpression in class Node

addAggregateExression

protected abstract Expression addAggregateExression(Expression expr)

INTERNAL

isAliasableNode

public boolean isAliasableNode()

Overrides:

isAliasableNode in class Node