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

java.lang.Object
  org.eclipse.persistence.jpa.jpql.model.query.AbstractStateObject
      org.eclipse.persistence.jpa.jpql.model.query.AbstractConditionalClauseStateObject
          org.eclipse.persistence.jpa.jpql.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

Version:

2.4

See Also:

HavingClause

Author:

Pascal Filion

Since:

2.4

Field Summary

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

CONDITIONAL_STATE_OBJECT_PROPERTY

Constructor Summary

HavingClauseStateObject(AbstractSelectStatementStateObject parent)
Creates a new HavingClauseStateObject.

Method Summary

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.
java.lang.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.model.query.AbstractConditionalClauseStateObject

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

HavingClauseStateObject

public HavingClauseStateObject(AbstractSelectStatementStateObject parent)

Creates a new HavingClauseStateObject.

Parameters:

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

Throws:

java.lang.NullPointerException - The given parent cannot be null

Method Detail

accept

public void accept(StateObjectVisitor visitor)

Visits this StateObject by the given visitor.

Parameters:

visitor - The visitor to visit this object

getExpression

public HavingClause getExpression()

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 java.lang.String getIdentifier()

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()

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