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EclipseLink 2.4.2, build 'v20130514-5956486' API Reference | ||||||||
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java.lang.Object org.eclipse.persistence.jpa.jpql.parser.AbstractExpression org.eclipse.persistence.jpa.jpql.parser.AbstractEncapsulatedExpression org.eclipse.persistence.jpa.jpql.parser.AbstractSingleEncapsulatedExpression org.eclipse.persistence.jpa.jpql.parser.EncapsulatedIdentificationVariableExpression org.eclipse.persistence.jpa.jpql.parser.IndexExpression
public final class IndexExpression
The INDEX function returns an integer value corresponding to the position of its argument in an ordered list. The INDEX function can only be applied to identification variables denoting types for which an order column has been specified.
expression ::= INDEX(identification_variable)
Field Summary |
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Fields inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractExpression |
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COMMA, DOT, DOUBLE_QUOTE, LEFT_CURLY_BRACKET, LEFT_PARENTHESIS, NOT_DEFINED, RIGHT_CURLY_BRACKET, RIGHT_PARENTHESIS, SINGLE_QUOTE, SPACE, UNDERSCORE |
Constructor Summary | |
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IndexExpression(AbstractExpression parent)
Creates a new IndexExpression . |
Method Summary | |
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void |
accept(ExpressionVisitor visitor)
Visits this Expression by the given visitor . |
JPQLQueryBNF |
getQueryBNF()
Returns the BNF of this Expression . |
protected java.lang.String |
parseIdentifier(WordParser wordParser)
Parses the identifier of this expression. |
Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.EncapsulatedIdentificationVariableExpression |
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encapsulatedExpressionBNF, parse |
Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractSingleEncapsulatedExpression |
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acceptChildren, addChildrenTo, addOrderedEncapsulatedExpressionTo, findQueryBNF, getExpression, hasEncapsulatedExpression, hasExpression, parseEncapsulatedExpression, removeEncapsulatedExpression, setExpression, toParsedTextEncapsulatedExpression |
Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractEncapsulatedExpression |
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addOrderedChildrenTo, areLogicalIdentifiersSupported, getActualIdentifier, getIdentifier, hasLeftParenthesis, hasRightParenthesis, hasSpaceAfterIdentifier, isParsingComplete, parse, shouldParseRightParenthesis, toParsedText |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public IndexExpression(AbstractExpression parent)
IndexExpression
.
parent
- The parent of this expressionMethod Detail |
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public void accept(ExpressionVisitor visitor)
Expression
by the given visitor
.
visitor
- The ExpressionVisitor
to visit this objectpublic JPQLQueryBNF getQueryBNF()
Expression
.
getQueryBNF
in interface Expression
getQueryBNF
in class EncapsulatedIdentificationVariableExpression
JPQLQueryBNF
, which represents the grammar of this Expression
protected java.lang.String parseIdentifier(WordParser wordParser)
parseIdentifier
in class AbstractEncapsulatedExpression
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