org.castor.cpa.query.object.condition
Class Null

java.lang.Object
  org.castor.cpa.query.object.AbstractQueryObject
      org.castor.cpa.query.object.condition.AbstractCondition
          org.castor.cpa.query.object.condition.SimpleCondition
              org.castor.cpa.query.object.condition.Null

All Implemented Interfaces:

Condition, QueryObject

public final class Null
extends SimpleCondition

Final class that represents null simple condition.

Since:

1.3

Version:

$Revision: 7121 $ $Date: 2006-04-25 16:09:10 -0600 (Tue, 25 Apr 2006) $

Author:

Udai Gupta, Ralf Joachim

Constructor Summary

Null()

Method Summary

StringBuilder

toString(StringBuilder sb) Append a string representation of the object to the given StringBuilder.

Methods inherited from class org.castor.cpa.query.object.condition.SimpleCondition

getExpression, isNot, not, setExpression, setNot

Methods inherited from class org.castor.cpa.query.object.condition.AbstractCondition

and, or

Methods inherited from class org.castor.cpa.query.object.AbstractQueryObject

toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Null

public Null()

Method Detail

toString

public StringBuilder toString(StringBuilder sb)

Append a string representation of the object to the given StringBuilder. In general, the toString method for query objects appends a string that textually represents this object. The result should be a query string that complies to EJB QL specification as long as the query object represents a syntay element of it. It is required that all subclasses override this method. The toString method defined at class Object is overwritten and calls this method.

Parameters:

sb - StringBuilder to append the string representation of this object to.

Returns:

Same instance of StringBuilder given as parameter.