org.apache.polygene.library.constraints

Class InstanceOfConstraint

java.lang.Object

org.apache.polygene.library.constraints.InstanceOfConstraint

All Implemented Interfaces:

Constraint<InstanceOf,Object>

public class InstanceOfConstraint
extends Object
implements Constraint<InstanceOf,Object>

Implement @InstanceOf constraint.

Constructor Summary

Constructors

Constructor and Description
InstanceOfConstraint()

Method Summary

Modifier and Type	Method and Description
boolean	isValid(InstanceOf annotation, Object parameter) For each value or parameter which should be checked this method will be invoked.

Methods inherited from class java.lang.Object

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

Constructor Detail

InstanceOfConstraint

public InstanceOfConstraint()

Method Detail

isValid

public boolean isValid(InstanceOf annotation,
                       Object parameter)
                throws NullPointerException

Description copied from interface: Constraint

For each value or parameter which should be checked this method will be invoked. If the method returns true the value is valid. If it returns false the value is considered invalid. When all constraints have been checked a ConstraintViolationException will be thrown with all the constraint violations that were found.

Specified by:

isValid in interface Constraint<InstanceOf,Object>

Parameters:

annotation - the annotation to match

parameter - the value to be checked

Returns:

true if valid, false if invalid

Throws:

NullPointerException