org.jmock.core.constraint
Class IsNull

java.lang.Object
  extended by org.jmock.core.constraint.IsNull
All Implemented Interfaces:
Constraint, SelfDescribing

public class IsNull
extends Object
implements Constraint

Is the value null?


Constructor Summary
IsNull()
           
 
Method Summary
 StringBuffer describeTo(StringBuffer buffer)
          Appends the description of this object to the buffer.
 boolean eval(Object o)
          Evaluates the constraint for argument o.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

IsNull

public IsNull()
Method Detail

eval

public boolean eval(Object o)
Description copied from interface: Constraint
Evaluates the constraint for argument o.

Specified by:
eval in interface Constraint
Parameters:
o - the object against which the constraint is evaluated.
Returns:
true if o meets the constraint, false if it does not.

describeTo

public StringBuffer describeTo(StringBuffer buffer)
Description copied from interface: SelfDescribing
Appends the description of this object to the buffer.

Specified by:
describeTo in interface SelfDescribing
Parameters:
buffer - The buffer that the description is appended to.
Returns:
The buffer passed to the invokedMethod.