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

Class LessThanNode

java.lang.Object

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

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

org.eclipse.persistence.internal.jpa.parsing.LessThanNode

public class LessThanNode
extends BinaryOperatorNode

INTERNAL

Purpose: Represent a '<' in EJBQL

Responsibilities:

• Generate the correct expression for a '<'

Since:

TopLink 4.0

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
LessThanNode()	LessThanNode constructor comment.

Method Summary

Modifier and Type	Method	Description
Expression	generateExpression(GenerationContext context)	INTERNAL Resolve the expression.
String	getAsString()	INTERNAL Get the string representation of this node.
void	validate(ParseTreeContext context)	INTERNAL Validate the current node and calculates its type.

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

addToExpression, appendExpression, applyToQuery, getAlias, 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 Detail

LessThanNode

public LessThanNode()

LessThanNode constructor comment.

Method Detail

validate

public void validate(ParseTreeContext context)

INTERNAL Validate the current node and calculates its type.

Overrides:

validate in class BinaryOperatorNode

generateExpression

public Expression generateExpression(GenerationContext context)

INTERNAL Resolve the expression. The steps are: 1. Set the expressionBuilder for the left and right nodes 2. Generate the expression for the left node 3. Add the .lessThan to the where clause returned from step 2 4. Generate the expression for the right side and use it as the parameter for the .lessThan() 5. Return the completed where clause to the caller

Overrides:

generateExpression in class Node

getAsString

public String getAsString()

INTERNAL Get the string representation of this node.

Overrides:

getAsString in class Node