public abstract class AggregateFunctionStateObject extends AbstractSingleEncapsulatedExpressionStateObject
SELECT clause the result of a query may be the result of an aggregate
function applied to a path expression.
BNF: aggregate_expression ::= {AVG|MAX|MIN|SUM}([DISTINCT] state_field_path_expression) |
COUNT([DISTINCT] identification_variable | state_field_path_expression | single_valued_association_path_expression)AggregateFunction| Modifier and Type | Field and Description |
|---|---|
static java.lang.String |
DISTINCT_PROPERTY
Notifies the visibility of the
DISTINCT identifier has changed. |
STATE_OBJECT_PROPERTY| Modifier and Type | Method and Description |
|---|---|
AggregateFunction |
getExpression()
Returns the actual parsed object if this
StateObject representation of the JPQL query
was created by parsing an existing JPQL query. |
boolean |
hasDistinct()
Sets whether the
DISTINCT keyword should be part of the query, which is
used to return only distinct (different) values. |
boolean |
isEquivalent(StateObject stateObject)
Determines whether the given
StateObject is equivalent to this one, i.e. |
void |
setDistinct(boolean distinct)
Sets whether the
DISTINCT keyword should be part of the query, which is
used to return only distinct (different) values |
void |
setStateObject(StateObject stateObject)
Sets the given
StateObject to represent the new encapsulated expression. |
void |
toggleDistinct()
Reverses the visibility of the
DISTINCT identifier. |
getStateObject, hasStateObject, parsegetIdentifieraddPropertyChangeListener, children, decorate, equals, findIdentificationVariable, getDeclaration, getDecorator, getGrammar, getManagedTypeProvider, getParent, getQueryBuilder, getRoot, getType, getType, getTypeHelper, getTypeRepository, hashCode, isDecorated, removePropertyChangeListener, setExpression, setParent, toString, toString, toTextacceptpublic static final java.lang.String DISTINCT_PROPERTY
DISTINCT identifier has changed.public AggregateFunction getExpression()
StateObject representation of the JPQL query
was created by parsing an existing JPQL query.getExpression in interface StateObjectgetExpression in class AbstractSingleEncapsulatedExpressionStateObjectStateObject
or null when the JPQL query is manually created (i.e. not from a string)public boolean hasDistinct()
DISTINCT keyword should be part of the query, which is
used to return only distinct (different) values.true to add DISTINCT to the query in order to have
distinct values; false if it is not requiredpublic boolean isEquivalent(StateObject stateObject)
StateObject is equivalent to this one, i.e. the
information of both StateObject is the same.isEquivalent in interface StateObjectisEquivalent in class AbstractSingleEncapsulatedExpressionStateObjectstateObject - The StateObject to compare its content to this onetrue if both object are equivalent; false otherwisepublic void setDistinct(boolean distinct)
DISTINCT keyword should be part of the query, which is
used to return only distinct (different) valuesdistinct - true to add DISTINCT to the query in order to
have distinct values; false if it is not requiredpublic void setStateObject(StateObject stateObject)
StateObject to represent the new encapsulated expression.stateObject - The new encapsulated StateObjectpublic void toggleDistinct()
DISTINCT identifier.EclipseLink 2.6.3, "build v20160428-59c81c5" API Reference