EclipseLink 2.4.2, build 'v20130514-5956486' API Reference

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

java.lang.Object
  extended by org.eclipse.persistence.jpa.jpql.parser.JPQLQueryBNF
      extended by 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

EclipseLink 2.4.2, build 'v20130514-5956486' API Reference