/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.isis.core.metamodel.facets.properties.interaction;
import com.google.common.base.Objects;
import org.apache.isis.applib.services.eventbus.AbstractInteractionEvent;
import org.apache.isis.applib.services.eventbus.PropertyInteractionEvent;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.facetapi.Facet;
import org.apache.isis.core.metamodel.facetapi.FacetHolder;
import org.apache.isis.core.metamodel.facets.InteractionHelper;
import org.apache.isis.core.metamodel.facets.SingleValueFacetAbstract;
import org.apache.isis.core.metamodel.facets.propcoll.accessor.PropertyOrCollectionAccessorFacet;
import org.apache.isis.core.metamodel.facets.properties.update.modify.PropertySetterFacet;
import org.apache.isis.core.metamodel.runtimecontext.ServicesInjector;
public abstract class PropertySetterFacetForInteractionAbstract
extends SingleValueFacetAbstract<Class<? extends PropertyInteractionEvent<?,?>>>
implements PropertySetterFacet {
public static Class<? extends Facet> type() {
return PropertySetterFacet.class;
}
private final InteractionHelper interactionHelper;
private final PropertyOrCollectionAccessorFacet getterFacet;
private final PropertySetterFacet setterFacet;
private final PropertyInteractionFacetAbstract propertyInteractionFacet;
public PropertySetterFacetForInteractionAbstract(
final Class<? extends PropertyInteractionEvent<?, ?>> eventType,
final PropertyOrCollectionAccessorFacet getterFacet,
final PropertySetterFacet setterFacet,
final PropertyInteractionFacetAbstract propertyInteractionFacet,
final ServicesInjector servicesInjector,
final FacetHolder holder) {
super(type(), eventType, holder);
this.getterFacet = getterFacet;
this.setterFacet = setterFacet;
this.propertyInteractionFacet = propertyInteractionFacet;
this.interactionHelper = new InteractionHelper(servicesInjector);
}
@Override
public void setProperty(ObjectAdapter targetAdapter, ObjectAdapter newValueAdapter) {
if(setterFacet == null) {
return;
}
if(!interactionHelper.hasEventBusService()) {
setterFacet.setProperty(targetAdapter, newValueAdapter);
return;
}
try {
// pick up existing event (saved in thread local during the validation phase)
final PropertyInteractionEvent<?, ?> existingEvent = propertyInteractionFacet.currentInteraction.get();
// ... post the executing event
final Object oldValue = getterFacet.getProperty(targetAdapter);
final Object newValue = ObjectAdapter.Util.unwrap(newValueAdapter);
interactionHelper.postEventForProperty(
value(), existingEvent, AbstractInteractionEvent.Phase.EXECUTING,
getIdentified(), targetAdapter, oldValue, newValue);
// ... perform the property modification
setterFacet.setProperty(targetAdapter, newValueAdapter);
// reading the actual value from the target object, playing it safe...
final Object actualNewValue = getterFacet.getProperty(targetAdapter);
if(Objects.equal(oldValue, actualNewValue)) {
return;
}
// ... post the executing event
final PropertyInteractionEvent<?, ?> event = propertyInteractionFacet.currentInteraction.get();
interactionHelper.postEventForProperty(value(), verify(event), AbstractInteractionEvent.Phase.EXECUTED, getIdentified(), targetAdapter, oldValue, actualNewValue);
} finally {
// clean up
propertyInteractionFacet.currentInteraction.set(null);
}
}
/**
* Optional hook to allow the facet implementation for the deprecated {@link org.apache.isis.applib.annotation.PostsPropertyChangedEvent} annotation
* to discard the event if of a different type.
*/
protected PropertyInteractionEvent<?, ?> verify(PropertyInteractionEvent<?, ?> event) {
return event;
}
}