|
EclipseLink 2.4.2, build 'v20130514-5956486' API Reference | ||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectorg.eclipse.persistence.jpa.jpql.model.query.AbstractStateObject
org.eclipse.persistence.jpa.jpql.model.query.AbstractEncapsulatedExpressionStateObject
org.eclipse.persistence.jpa.jpql.model.query.AbstractSingleEncapsulatedExpressionStateObject
org.eclipse.persistence.jpa.jpql.model.query.AggregateFunctionStateObject
org.eclipse.persistence.jpa.jpql.model.query.CountFunctionStateObject
public class CountFunctionStateObject
One of the aggregate functions. The return type of this function is a Long
.
expression ::= COUNT ([DISTINCT] identification_variable |
state_field_path_expression |
single_valued_object_path_expression)
CountFunction
Field Summary |
---|
Fields inherited from class org.eclipse.persistence.jpa.jpql.model.query.AggregateFunctionStateObject |
---|
DISTINCT_PROPERTY |
Fields inherited from class org.eclipse.persistence.jpa.jpql.model.query.AbstractSingleEncapsulatedExpressionStateObject |
---|
STATE_OBJECT_PROPERTY |
Constructor Summary | |
---|---|
CountFunctionStateObject(StateObject parent)
Creates a new CountFunctionStateObject . |
|
CountFunctionStateObject(StateObject parent,
boolean distinct,
StateObject stateObject)
Creates a new CountFunctionStateObject . |
|
CountFunctionStateObject(StateObject parent,
boolean distinct,
java.lang.String path)
Creates a new CountFunctionStateObject . |
|
CountFunctionStateObject(StateObject parent,
StateObject stateObject)
Creates a new CountFunctionStateObject . |
|
CountFunctionStateObject(StateObject parent,
java.lang.String path)
Creates a new CountFunctionStateObject . |
Method Summary | |
---|---|
void |
accept(StateObjectVisitor visitor)
Visits this StateObject by the given visitor . |
CountFunction |
getExpression()
Returns the actual parsed object if this StateObject representation of the JPQL query
was created by parsing an existing JPQL query. |
java.lang.String |
getIdentifier()
Returns the JPQL identifier of the expression represented by this AbstractSingleEncapsulatedExpressionStateObject . |
protected java.lang.String |
getQueryBNFId()
Returns the unique identifier of the JPQLQueryBNF that will determine how to parse the encapsulated expression. |
void |
setExpression(CountFunction expression)
Keeps a reference of the parsed object object, which should only be done
when this object is instantiated during the conversion of a parsed JPQL query into StateObjects . |
Methods inherited from class org.eclipse.persistence.jpa.jpql.model.query.AggregateFunctionStateObject |
---|
hasDistinct, isEquivalent, setDistinct, setStateObject, toggleDistinct, toTextEncapsulatedExpression |
Methods inherited from class org.eclipse.persistence.jpa.jpql.model.query.AbstractSingleEncapsulatedExpressionStateObject |
---|
addChildren, getStateObject, hasStateObject, parse |
Methods inherited from class org.eclipse.persistence.jpa.jpql.model.query.AbstractEncapsulatedExpressionStateObject |
---|
toTextInternal |
Methods inherited from class org.eclipse.persistence.jpa.jpql.model.query.AbstractStateObject |
---|
acceptUnknownVisitor, acceptUnknownVisitor, addProblems, addPropertyChangeListener, areEquivalent, buildProblem, buildProblem, buildStateObject, buildStateObjects, checkParent, children, decorate, equals, findIdentificationVariable, firePropertyChanged, getChangeSupport, getDeclaration, getDecorator, getGrammar, getManagedTypeProvider, getParent, getQueryBuilder, getRoot, getType, getType, getTypeHelper, getTypeRepository, hashCode, initialize, isDecorated, parent, parent, parent, removePropertyChangeListener, setExpression, setParent, toString, toString, toStringInternal, toStringItems, toText |
Methods inherited from class java.lang.Object |
---|
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Constructor Detail |
---|
public CountFunctionStateObject(StateObject parent)
CountFunctionStateObject
.
parent
- The parent of this state object, which cannot be null
java.lang.NullPointerException
- The given parent cannot be null
public CountFunctionStateObject(StateObject parent, boolean distinct, StateObject stateObject)
CountFunctionStateObject
.
parent
- The parent of this state object, which cannot be null
distinct
- true
to add DISTINCT
to the query in order to
have distinct values; false
if it is not requiredstateObject
- The StateObject
representing the encapsulated expression
java.lang.NullPointerException
- The given parent cannot be null
public CountFunctionStateObject(StateObject parent, boolean distinct, java.lang.String path)
CountFunctionStateObject
.
parent
- The parent of this state object, which cannot be null
distinct
- true
to add DISTINCT
to the query in order to
have distinct values; false
if it is not requiredpath
- Either the identification variable or the state field path expression
java.lang.NullPointerException
- The given parent cannot be null
public CountFunctionStateObject(StateObject parent, StateObject stateObject)
CountFunctionStateObject
.
parent
- The parent of this state object, which cannot be null
stateObject
- The StateObject
representing the encapsulated expression
java.lang.NullPointerException
- The given parent cannot be null
public CountFunctionStateObject(StateObject parent, java.lang.String path)
CountFunctionStateObject
.
parent
- The parent of this state object, which cannot be null
path
- Either the identification variable or the state field path expression
java.lang.NullPointerException
- The given parent cannot be null
Method Detail |
---|
public void accept(StateObjectVisitor visitor)
StateObject
by the given visitor
.
visitor
- The visitor
to visit this objectpublic CountFunction getExpression()
StateObject
representation of the JPQL query
was created by parsing an existing JPQL query.
getExpression
in interface StateObject
getExpression
in class AggregateFunctionStateObject
StateObject
or null
when the JPQL query is manually created (i.e. not from a string)public java.lang.String getIdentifier()
AbstractSingleEncapsulatedExpressionStateObject
.
getIdentifier
in class AbstractEncapsulatedExpressionStateObject
protected java.lang.String getQueryBNFId()
JPQLQueryBNF
that will determine how to parse the encapsulated expression.
getQueryBNFId
in class AbstractSingleEncapsulatedExpressionStateObject
null
ID of the BNFpublic void setExpression(CountFunction expression)
parsed object
object, which should only be done
when this object is instantiated during the conversion of a parsed JPQL query into StateObjects
.
expression
- The parsed object
representing a COUNT
expression
|
EclipseLink 2.4.2, build 'v20130514-5956486' API Reference | ||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |