Module org.eclipse.persistence.jpa.jpql

Package org.eclipse.persistence.jpa.jpql.tools.model.query

Class HavingClauseStateObject

java.lang.Object

org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractStateObject

org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractConditionalClauseStateObject

org.eclipse.persistence.jpa.jpql.tools.model.query.HavingClauseStateObject

All Implemented Interfaces:

StateObject

public class HavingClauseStateObject
extends AbstractConditionalClauseStateObject

The HAVING construct enables conditions to be specified that further restrict the query result as restrictions upon the groups.

BNF: having_clause ::= HAVING conditional_expression

Since:

2.4

Version:

2.4

See Also:

• HavingClause

Field Summary

Fields inherited from class org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractConditionalClauseStateObject

CONDITIONAL_STATE_OBJECT_PROPERTY

Constructor Summary

Constructors

Constructor	Description
HavingClauseStateObject(AbstractSelectStatementStateObject parent)	Creates a new HavingClauseStateObject.

Method Summary

Modifier and Type	Method	Description
void	accept(StateObjectVisitor visitor)	Visits this StateObject by the given visitor.
HavingClause	getExpression()	Returns the actual parsed object if this StateObject representation of the JPQL query was created by parsing an existing JPQL query.
String	getIdentifier()	Returns the JPQL identifier of this clause.
AbstractSelectStatementStateObject	getParent()	Returns the parent of this StateObject.
void	setExpression(HavingClause 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.tools.model.query.AbstractConditionalClauseStateObject

addChildren, andParse, getBuilder, getConditional, hasConditional, isEquivalent, orParse, parse, setConditional, shouldEncapsulateORExpression, toTextInternal

Methods inherited from class org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractStateObject

acceptUnknownVisitor, acceptUnknownVisitor, addProblems, addPropertyChangeListener, areEquivalent, buildProblem, buildProblem, buildStateObject, buildStateObjects, checkParent, children, decorate, equals, findIdentificationVariable, firePropertyChanged, getChangeSupport, getDeclaration, getDecorator, getGrammar, getManagedTypeProvider, 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 Details

HavingClauseStateObject

public HavingClauseStateObject(AbstractSelectStatementStateObject parent)

Creates a new HavingClauseStateObject.

Parameters:

parent - The parent of this state object, which cannot be null

Throws:

NullPointerException - The given parent cannot be null

Method Details

accept

public void accept(StateObjectVisitor visitor)

Description copied from interface: StateObject

Visits this StateObject by the given visitor.

Parameters:

visitor - The visitor to visit this object

getExpression

public HavingClause getExpression()

Description copied from interface: StateObject

Returns the actual parsed object if this StateObject representation of the JPQL query was created by parsing an existing JPQL query.

Specified by:

getExpression in interface StateObject

Overrides:

getExpression in class AbstractStateObject

Returns:

The parsed object when a JPQL query is parsed and converted into a StateObject or null when the JPQL query is manually created (i.e. not from a string)

getIdentifier

public String getIdentifier()

Description copied from class: AbstractConditionalClauseStateObject

Returns the JPQL identifier of this clause.

Specified by:

getIdentifier in class AbstractConditionalClauseStateObject

Returns:

The JPQL identifier of this conditional clause

getParent

public AbstractSelectStatementStateObject getParent()

Description copied from interface: StateObject

Returns the parent of this StateObject.

Specified by:

getParent in interface StateObject

Overrides:

getParent in class AbstractStateObject

Returns:

Returns the parent of this StateObject, which is null only when this is the root of the hierarchy

setExpression

public void setExpression(HavingClause 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.

Parameters:

expression - The parsed object representing a HAVING expression