Package oracle.webcenter.portal.persistence.query

Class IsNull

java.lang.Object

oracle.webcenter.portal.persistence.query.PropertyComparison

oracle.webcenter.portal.persistence.query.IsNull

All Implemented Interfaces:

Expression

@Exported
public class IsNull
extends PropertyComparison

Expression that checks is a property is null

Constructor Summary

Constructors

Constructor	Description
IsNull(Property property)	Constructor

Method Summary

Modifier and Type	Method	Description
void	accept(Visitor visitor)	Accepts a visitor
Expression	and(Expression expression)	Creates an And expression which will be a logical "and" of this expression and the expression passed in as a parameter
Expression	not()	Creates a Not expression which will be the logical "not" of this epxression
Expression	or(Expression expression)	Creates an Or expression which will be a logical "or" of this expression and the expression passed in as a parameter
String	toString()

Methods inherited from class oracle.webcenter.portal.persistence.query.PropertyComparison

getProperty

Methods inherited from class java.lang.Object

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

Constructor Details

IsNull

public IsNull(Property property)

Constructor

Parameters:

property - the property to compare

Method Details

accept

public void accept(Visitor visitor)

Accepts a visitor

Parameters:

visitor - the visitor

toString

public String toString()

Overrides:

toString in class Object

and

public Expression and(Expression expression)

Creates an And expression which will be a logical "and" of this expression and the expression passed in as a parameter

Specified by:

and in interface Expression

Parameters:

expression - the other expression

Returns:

the And expression

or

public Expression or(Expression expression)

Creates an Or expression which will be a logical "or" of this expression and the expression passed in as a parameter

Specified by:

or in interface Expression

Parameters:

expression - the other expression

Returns:

the Or expression

not

public Expression not()

Creates a Not expression which will be the logical "not" of this epxression

Specified by:

not in interface Expression

Returns:

the Not expression