oracle.toplink.essentials.internal.parsing

Class SumNode

java.lang.Object

oracle.toplink.essentials.internal.parsing.Node

oracle.toplink.essentials.internal.parsing.AggregateNode

oracle.toplink.essentials.internal.parsing.SumNode

public class SumNode
extends AggregateNode

INTERNAL

Purpose: Model a SUM

Responsibilities:

• Apply itself to a query correctly

Field Summary

Fields inherited from class oracle.toplink.essentials.internal.parsing.Node

left, right, shouldGenerateExpression

Constructor Summary

Constructors

Constructor and Description
SumNode()

Method Summary

Modifier and Type	Method and Description
protected Expression	addAggregateExression(Expression expr) INTERNAL
void	applyToQuery(ObjectLevelReadQuery theQuery, GenerationContext context) INTERNAL Apply this node to the passed query
protected Class	calculateReturnType(GenerationContext context) INTERNAL This method calculates the return type of the SUM operation.
protected Object	calculateReturnType(Object argType, TypeHelper helper) INTERNAL Helper method to calculate the return type of the SUM operation.
String	getAsString() INTERNAL Get the string representation of this node.
void	validate(ParseTreeContext context) INTERNAL Validate node and calculate its type.

Methods inherited from class oracle.toplink.essentials.internal.parsing.AggregateNode

generateExpression, isAggregateNode, resolveAttribute, resolveClass, setDistinct, usesDistinct

Methods inherited from class oracle.toplink.essentials.internal.parsing.Node

addToExpression, appendExpression, getColumn, getLeft, getLine, getRight, getType, hasLeft, hasRight, isAttributeNode, isConstructorNode, isCountNode, isDivideNode, isDotNode, isEscape, isLiteralNode, isMinusNode, isMultiplyNode, isNotNode, isParameterNode, isPlusNode, isSubqueryNode, isVariableNode, qualifyAttributeAccess, resolveClass, resolveMapping, resolveMapping, 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 Detail

SumNode

public SumNode()

Method Detail

applyToQuery

public void applyToQuery(ObjectLevelReadQuery theQuery,
                         GenerationContext context)

INTERNAL Apply this node to the passed query

Overrides:

applyToQuery in class Node

validate

public void validate(ParseTreeContext context)

INTERNAL Validate node and calculate its type.

Overrides:

validate in class Node

addAggregateExression

protected Expression addAggregateExression(Expression expr)

INTERNAL

Specified by:

addAggregateExression in class AggregateNode

calculateReturnType

protected Class calculateReturnType(GenerationContext context)

INTERNAL This method calculates the return type of the SUM operation.

calculateReturnType

protected Object calculateReturnType(Object argType,
                                     TypeHelper helper)

INTERNAL Helper method to calculate the return type of the SUM operation.

getAsString

public String getAsString()

INTERNAL Get the string representation of this node.

Overrides:

getAsString in class Node