/*
* 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.objectvalue.mustsatisfyspec;
import java.util.List;
import org.apache.isis.applib.events.ValidityEvent;
import org.apache.isis.applib.services.i18n.TranslationService;
import org.apache.isis.applib.spec.Specification;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.facetapi.Facet;
import org.apache.isis.core.metamodel.facetapi.FacetAbstract;
import org.apache.isis.core.metamodel.facetapi.FacetHolder;
import org.apache.isis.core.metamodel.facetapi.IdentifiedHolder;
import org.apache.isis.core.metamodel.interactions.ProposedHolder;
import org.apache.isis.core.metamodel.interactions.ValidityContext;
import org.apache.isis.core.metamodel.services.ServicesInjector;
public abstract class MustSatisfySpecificationFacetAbstract extends FacetAbstract implements MustSatisfySpecificationFacet {
public static Class<? extends Facet> type() {
return MustSatisfySpecificationFacet.class;
}
private final List<Specification> specifications;
/**
* For testing.
*/
public List<Specification> getSpecifications() {
return specifications;
}
private final SpecificationEvaluator specificationEvaluator;
public MustSatisfySpecificationFacetAbstract(
final List<Specification> specifications,
final FacetHolder holder,
final ServicesInjector servicesInjector) {
super(type(), holder, Derivation.NOT_DERIVED);
inject(specifications, servicesInjector);
this.specifications = specifications;
final TranslationService translationService = servicesInjector.lookupService(TranslationService.class);
// sadness: same as in TranslationFactory
final String translationContext = ((IdentifiedHolder) holder).getIdentifier().toClassAndNameIdentityString();
specificationEvaluator = new SpecificationEvaluator(translationService, translationContext);
}
private static void inject(
final List specifications, final ServicesInjector servicesInjector) {
final List<Object> specificationsAsObjects = specifications;
servicesInjector.injectServicesInto(specificationsAsObjects);
}
@Override
public String invalidates(final ValidityContext<? extends ValidityEvent> validityContext) {
if (!(validityContext instanceof ProposedHolder)) {
return null;
}
final ProposedHolder proposedHolder = (ProposedHolder) validityContext;
final ObjectAdapter proposedAdapter = proposedHolder.getProposed();
if(proposedAdapter == null) {
return null;
}
final Object proposedObject = proposedAdapter.getObject();
return specificationEvaluator.evaluation()
.evaluate(specifications, proposedObject)
.getReason();
}
/**
* For benefit of subclasses.
*/
protected static Specification newSpecificationElseNull(final Class<?> value) {
if (!(Specification.class.isAssignableFrom(value))) {
return null;
}
try {
return (Specification) value.newInstance();
} catch (final InstantiationException e) {
return null;
} catch (final IllegalAccessException e) {
return null;
}
}
}