org.hibernate.criterion

Class NullExpression

java.lang.Object

org.hibernate.criterion.NullExpression

All Implemented Interfaces:

Serializable, Criterion

public class NullExpression
extends Object
implements Criterion

Constrains a property to be null

Author:

Gavin King

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	NullExpression(String propertyName) Constructs a NullExpression

Method Summary

Modifier and Type	Method and Description
TypedValue[]	getTypedValues(Criteria criteria, CriteriaQuery criteriaQuery) Return typed values for all parameters in the rendered SQL fragment
String	toSqlString(Criteria criteria, CriteriaQuery criteriaQuery) Render the SQL fragment
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

NullExpression

protected NullExpression(String propertyName)

Constructs a NullExpression

Parameters:

propertyName - The name of the property to check for null

See Also:

Restrictions.isNull(java.lang.String)

Method Detail

toSqlString

public String toSqlString(Criteria criteria,
                          CriteriaQuery criteriaQuery)
                   throws HibernateException

Description copied from interface: Criterion

Render the SQL fragment

Specified by:

toSqlString in interface Criterion

Parameters:

criteria - The local criteria

criteriaQuery - The overal criteria query

Returns:

The generated SQL fragment

Throws:

HibernateException - Problem during rendering.

getTypedValues

public TypedValue[] getTypedValues(Criteria criteria,
                                   CriteriaQuery criteriaQuery)
                            throws HibernateException

Description copied from interface: Criterion

Return typed values for all parameters in the rendered SQL fragment

Specified by:

getTypedValues in interface Criterion

Parameters:

criteria - The local criteria

criteriaQuery - The overal criteria query

Returns:

The types values (for binding)

Throws:

HibernateException - Problem determining types.

toString

public String toString()

Overrides:

toString in class Object