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

Class MinusNode

java.lang.Object

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

org.eclipse.persistence.internal.jpa.parsing.BinaryOperatorNode

org.eclipse.persistence.internal.jpa.parsing.MinusNode

All Implemented Interfaces:

AliasableNode

public class MinusNode
extends BinaryOperatorNode
implements AliasableNode

INTERNAL

Purpose: Represent a '-' in EJBQL

Responsibilities:

• Generate the correct expression for a '-'

Since:

July 2003

Author:

Jon Driscoll and Joel Lucuik

Field Summary

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

alias, left, right, shouldGenerateExpression

Constructor Summary

Constructors

Constructor	Description
MinusNode()

Method Summary

Modifier and Type	Method	Description
void	applyToQuery(ObjectLevelReadQuery theQuery, GenerationContext context)	INTERNAL Apply this node to the passed query
Expression	generateExpression(GenerationContext context)	INTERNAL Generate the expression.
boolean	isAliasableNode()
boolean	isMinusNode()	INTERNAL Is this node a Minus node
void	validate(ParseTreeContext context)	INTERNAL Validate node and calculates 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, 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

MinusNode

public MinusNode()

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 calculates its type.

Overrides:

validate in class BinaryOperatorNode

generateExpression

public Expression generateExpression(GenerationContext context)

INTERNAL Generate the expression. The steps are: 1. Generate the expression for the left node 2. Add the .subtract to the where clause returned from step 1 3. Generate the expression for the right side and use it as the parameter for the .subtract() 4. Return the completed where clause to the caller

Overrides:

generateExpression in class Node

isMinusNode

public boolean isMinusNode()

Description copied from class: Node

INTERNAL Is this node a Minus node

Overrides:

isMinusNode in class Node

isAliasableNode

public boolean isAliasableNode()

Overrides:

isAliasableNode in class Node