org.mmbase.storage.search
Interface FieldNullConstraint

All Superinterfaces:

Constraint, FieldConstraint

All Known Implementing Classes:

BasicFieldNullConstraint

public interface FieldNullConstraint

extends FieldConstraint

A constraint that tests if a stepfield value is null.

This corresponds to IS NULL in SQL SELECT-syntax.

Since:

MMBase-1.7

Version:

$Id: FieldNullConstraint.java,v 1.2 2003/03/10 11:50:47 pierre Exp $

Author:

Rob van Maris

Method Summary

java.lang.String

toString() Returns a string representation of this FieldNullConstraint.

Methods inherited from interface org.mmbase.storage.search.FieldConstraint

getField, isCaseSensitive

Methods inherited from interface org.mmbase.storage.search.Constraint

equals, getBasicSupportLevel, hashCode, isInverse

Method Detail

toString

public java.lang.String toString()

Returns a string representation of this FieldNullConstraint. The string representation has the form "FieldNullConstraint(inverse:<:inverse>, field:<field>, casesensitive:<casesensitive>)" where

• <inverse>is the value returned by isInverse()
• <field> is the field alias returned by FieldConstraint#getField().getAlias()
• <casesensitive> is the value returned by isCaseSensitive()

Returns:

A string representation of this FieldNullConstraint.