/*
* 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.object.immutable;
import org.apache.isis.applib.annotation.When;
import org.apache.isis.applib.events.UsabilityEvent;
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.WhenValueFacetAbstract;
import org.apache.isis.core.metamodel.interactions.UsabilityContext;
public abstract class ImmutableFacetAbstract extends WhenValueFacetAbstract implements ImmutableFacet {
public static Class<? extends Facet> type() {
return ImmutableFacet.class;
}
public ImmutableFacetAbstract(final When value, final FacetHolder holder) {
super(type(), holder, value);
}
/**
* Immutable facet only prevents changes to a property or a collection.
*/
@Override
public String disables(final UsabilityContext<? extends UsabilityEvent> ic) {
final ObjectAdapter target = ic.getTarget();
switch (ic.getInteractionType()) {
case PROPERTY_MODIFY:
case COLLECTION_ADD_TO:
case COLLECTION_REMOVE_FROM:
return disabledReason(target);
default:
return null;
}
}
public String disabledReason(final ObjectAdapter targetAdapter) {
if (when() == When.ALWAYS) {
return "Always immmutable";
} else if (when() == When.NEVER) {
return null;
}
// remaining tests depend on target in question.
if (targetAdapter == null) {
return null;
}
if (when() == When.UNTIL_PERSISTED) {
return targetAdapter.isTransient() ? "Immutable until persisted" : null;
} else if (when() == When.ONCE_PERSISTED) {
return targetAdapter.representsPersistent() ? "Immutable once persisted" : null;
}
return null;
}
}