org.eclipse.ocl.examples.eventmanager.filters

Class OldValueClassFilter

java.lang.Object

org.eclipse.ocl.examples.eventmanager.filters.AbstractEventFilter

org.eclipse.ocl.examples.eventmanager.filters.ClassFilter

org.eclipse.ocl.examples.eventmanager.filters.OldValueClassFilter

All Implemented Interfaces:

EventFilter

public class OldValueClassFilter
extends ClassFilter

Matches an event's Notification.getOldValue() to an EObject.eClass(). An exact match, not considering any inheritance relations, is required. If the new value is a collection, e.g., because several elements were removed from a many-feature at once, this filter matches if at least one of the elements' class 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 OldValueClassFilters 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. Assume there is an AndFiter with two OldValueClassFilters inside, one matching X, the other matching Y. 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 OldValueClassFilter matches because of the X element, and the second OldValueClassFilter 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

Constructors

Constructor and Description
OldValueClassFilter(org.eclipse.emf.ecore.EClass clazz, boolean isNegated)

Method Summary

Methods

Modifier and Type	Method and Description
OldValueClassFilter	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.ClassFilter

getFilterCriterion, getWantedClass, matches

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

OldValueClassFilter

public OldValueClassFilter(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 ClassFilter

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 ClassFilter

clone

public OldValueClassFilter clone()

Specified by:

clone in interface EventFilter

Overrides:

clone in class ClassFilter