Class EmptyCollectionComparisonNode
- java.lang.Object
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- org.eclipse.persistence.internal.jpa.parsing.Node
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- org.eclipse.persistence.internal.jpa.parsing.SimpleConditionalExpressionNode
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- org.eclipse.persistence.internal.jpa.parsing.EmptyCollectionComparisonNode
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public class EmptyCollectionComparisonNode extends SimpleConditionalExpressionNode
INTERNALPurpose: 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
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Field Summary
Fields Modifier and Type Field Description boolean
notIndicated
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Fields inherited from class org.eclipse.persistence.internal.jpa.parsing.Node
alias, left, right, shouldGenerateExpression
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Constructor Summary
Constructors Constructor Description EmptyCollectionComparisonNode()
EmptyCollectionComparisonNode constructor comment.
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Method Summary
All Methods Instance Methods Concrete Methods 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
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Method Detail
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validate
public void validate(ParseTreeContext context)
INTERNAL Validate node and calculate its type.
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generateExpression
public Expression generateExpression(GenerationContext context)
INTERNAL Return a EclipseLink expression for this node.- Overrides:
generateExpression
in classNode
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indicateNot
public void indicateNot()
INTERNAL Indicate if a NOT was found in the WHERE clause. Examples: ...WHERE emp.phoneNumbers IS NOT EMPTY
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