org.eclipse.ocl.examples.eventmanager.filters
Class OldValueClassFilterIncludingSubclasses

java.lang.Object
  org.eclipse.ocl.examples.eventmanager.filters.AbstractEventFilter
      org.eclipse.ocl.examples.eventmanager.filters.ClassFilter
          org.eclipse.ocl.examples.eventmanager.filters.ClassFilterIncludingSubclasses
              org.eclipse.ocl.examples.eventmanager.filters.OldValueClassFilterIncludingSubclasses

All Implemented Interfaces:

EventFilter

public class OldValueClassFilterIncludingSubclasses
extends ClassFilterIncludingSubclasses

Matches an event's Notification.getOldValue() to an EObject.eClass() and all subclasses of this EClass. If the new value is a collection then this filter matches if at least one of the collection's elements is matched.

When several such filters are combined in an AndFilter, the AndFilter matches if all of its operand filters match. This does not require the individual OldValueClassFilterIncludingSubclassess to match based on the same element in case the old value happens to be a collection. For example, assume there are two classes X and Y with a class Z that has both, X and Y as its superclasses (multiple inheritance). Assume there is an AndFiter with two OldValueClassFilterIncludingSubclassess inside, one matching X, the other matching Y. If only a single element is the old value of a Notification, the AndFilter matches the notification if and only if the old value conforms to both, X and Y, for example if its type is Z. However, if there are two elements in the old value collection of the Notification, one of type X and the other of type Y, the first OldValueClassFilterIncludingSubclasses matches because of the X element, and the second OldValueClassFilterIncludingSubclasses matches because of the Y element and hence the AndFilter matches. However, no single element in the old value collection fulfills both criteria.

Author:

Philipp Berger, Axel Uhl

Field Summary

Fields inherited from class org.eclipse.ocl.examples.eventmanager.filters.ClassFilter

wantedClass

Constructor Summary

OldValueClassFilterIncludingSubclasses(org.eclipse.emf.ecore.EClass clazz, boolean isNegated)

Method Summary

OldValueClassFilterIncludingSubclasses	clone()
boolean	equals(java.lang.Object obj)
int	hashCode()
boolean	matchesFor(org.eclipse.emf.common.notify.Notification event) Tests if the incoming Notification matches the intern specification
java.lang.String	toString()

Methods inherited from class org.eclipse.ocl.examples.eventmanager.filters.ClassFilterIncludingSubclasses

matches

Methods inherited from class org.eclipse.ocl.examples.eventmanager.filters.ClassFilter

getFilterCriterion, getWantedClass

Methods inherited from class org.eclipse.ocl.examples.eventmanager.filters.AbstractEventFilter

expandNewAndOldValueCollections, isNegated, setNegated

Methods inherited from class java.lang.Object

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

Constructor Detail

OldValueClassFilterIncludingSubclasses

public OldValueClassFilterIncludingSubclasses(org.eclipse.emf.ecore.EClass clazz,
                                              boolean isNegated)

Method Detail

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class ClassFilter

hashCode

public int hashCode()

Overrides:

hashCode in class ClassFilterIncludingSubclasses

matchesFor

public boolean matchesFor(org.eclipse.emf.common.notify.Notification event)

Description copied from interface: EventFilter

Tests if the incoming Notification matches the intern specification

Specified by:

matchesFor in interface EventFilter

Overrides:

matchesFor in class ClassFilter

Parameters:

event - the Notification to control

Returns:

whether the given Notification matches the intern specification

toString

public java.lang.String toString()

Overrides:

toString in class ClassFilterIncludingSubclasses

clone

public OldValueClassFilterIncludingSubclasses clone()

Specified by:

clone in interface EventFilter

Overrides:

clone in class ClassFilterIncludingSubclasses