org.eclipse.persistence.jpa.jpql.parser
Class AggregateExpressionBNF

java.lang.Object
  org.eclipse.persistence.jpa.jpql.parser.JPQLQueryBNF
      org.eclipse.persistence.jpa.jpql.parser.AggregateExpressionBNF

public final class AggregateExpressionBNF
extends JPQLQueryBNF

The query BNF for an aggregate expression.

JPA 1.0, 2.0:

BNF: aggregate_expression ::= { AVG | MAX | MIN | SUM } ([DISTINCT] state_field_path_expression) | COUNT ([DISTINCT] identification_variable | state_field_path_expression | single_valued_object_path_expression)

JPA 2.1:

BNF: aggregate_expression ::= { AVG | MAX | MIN | SUM } ([DISTINCT] state_field_path_expression) | COUNT ([DISTINCT] identification_variable | state_field_path_expression | single_valued_object_path_expression) | function_invocation

Version:

2.4

Author:

Pascal Filion

Since:

2.3

Field Summary

static java.lang.String

ID The unique identifier of this BNF rule.

Constructor Summary

AggregateExpressionBNF()
Creates a new AggregateExpressionBNF.

Method Summary

protected void

initialize() Initializes this BNF by registering child JPQLQueryBNFs and ExpressionFactories.

Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.JPQLQueryBNF

children, getExpressionFactory, getExpressionFactoryIds, getExpressionRegistry, getFallbackBNFId, getFallbackExpressionFactoryId, getId, getIdentifiers, handleAggregate, handleCollection, handlesSubExpression, hasIdentifier, isCompound, nonCompoundChildren, registerChild, registerExpressionFactory, setCompound, setFallbackBNFId, setFallbackExpressionFactoryId, setHandleAggregate, setHandleCollection, setHandleSubExpression, toString, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

ID

public static final java.lang.String ID

The unique identifier of this BNF rule.

See Also:

Constant Field Values

Constructor Detail

AggregateExpressionBNF

public AggregateExpressionBNF()

Creates a new AggregateExpressionBNF.

Method Detail

initialize

protected void initialize()

Initializes this BNF by registering child JPQLQueryBNFs and ExpressionFactories.

Overrides:

initialize in class JPQLQueryBNF