org.mmbase.storage.search.implementation
Class BasicFieldNullConstraint

java.lang.Object
  org.mmbase.storage.search.implementation.BasicConstraint
      org.mmbase.storage.search.implementation.BasicFieldConstraint
          org.mmbase.storage.search.implementation.BasicFieldNullConstraint

All Implemented Interfaces:

Constraint, FieldConstraint, FieldNullConstraint

public class BasicFieldNullConstraint

extends BasicFieldConstraint

implements FieldNullConstraint

Basic implementation.

Since:

MMBase-1.7

Version:

$Id: BasicFieldNullConstraint.java,v 1.3 2003/03/10 11:50:55 pierre Exp $

Author:

Rob van Maris

Constructor Summary

BasicFieldNullConstraint(StepField field)
Constructor.

Method Summary

boolean	equals(java.lang.Object obj) Compares this constraint to the specified object.
int	hashCode()
java.lang.String	toString() Returns a string representation of this FieldNullConstraint.

Methods inherited from class org.mmbase.storage.search.implementation.BasicFieldConstraint

getField, isCaseSensitive, setCaseSensitive

Methods inherited from class org.mmbase.storage.search.implementation.BasicConstraint

getBasicSupportLevel, isInverse, setInverse

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

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

getField, isCaseSensitive

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

getBasicSupportLevel, isInverse

Constructor Detail

BasicFieldNullConstraint

public BasicFieldNullConstraint(StepField field)

Constructor.

Parameters:

field - The associated field.

Throws:

java.lang.IllegalArgumentException - when an invalid argument is supplied.

Method Detail

equals

public boolean equals(java.lang.Object obj)

Description copied from interface: Constraint

Compares this constraint to the specified object. The result is true if and only if the argument is a non-null Constraint object representing the same constraint(s).

Specified by:

equals in interface Constraint

Overrides:

equals in class BasicFieldConstraint

hashCode

public int hashCode()

Specified by:

hashCode in interface Constraint

Overrides:

hashCode in class BasicFieldConstraint

toString

public java.lang.String toString()

Description copied from interface: FieldNullConstraint

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()

Specified by:

toString in interface FieldNullConstraint