/*
* 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.services.factory;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import org.apache.isis.applib.NonRecoverableException;
import org.apache.isis.applib.annotation.DomainService;
import org.apache.isis.applib.annotation.NatureOfService;
import org.apache.isis.applib.annotation.Programmatic;
import org.apache.isis.applib.services.factory.FactoryService;
import org.apache.isis.applib.services.registry.ServiceRegistry;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.facets.object.mixin.MixinFacet;
import org.apache.isis.core.metamodel.services.persistsession.PersistenceSessionServiceInternal;
import org.apache.isis.core.metamodel.spec.ObjectSpecification;
import org.apache.isis.core.metamodel.specloader.SpecificationLoader;
@DomainService(
nature = NatureOfService.DOMAIN,
menuOrder = "" + Integer.MAX_VALUE
)
public class FactoryServiceInternalDefault implements FactoryService {
@Programmatic
@Override
@SuppressWarnings("unchecked")
public <T> T instantiate(final Class<T> domainClass) {
final ObjectSpecification spec = specificationLoader.loadSpecification(domainClass);
final ObjectAdapter adapter = doCreateTransientInstance(spec);
return (T) adapter.getObject();
}
/**
* Factored out as a potential hook method for subclasses.
*/
protected ObjectAdapter doCreateTransientInstance(final ObjectSpecification spec) {
return persistenceSessionServiceInternal.createTransientInstance(spec);
}
@Programmatic
@Override
public <T> T mixin(final Class<T> mixinClass, final Object mixedIn) {
final ObjectSpecification objectSpec = specificationLoader.loadSpecification(mixinClass);
final MixinFacet mixinFacet = objectSpec.getFacet(MixinFacet.class);
if(mixinFacet == null) {
throw new NonRecoverableException("Class '" + mixinClass.getName() + " is not a mixin");
}
if(!mixinFacet.isMixinFor(mixedIn.getClass())) {
throw new NonRecoverableException("Mixin class '" + mixinClass.getName() + " is not a mixin for supplied object '" + mixedIn + "'");
}
final Constructor<?>[] constructors = mixinClass.getConstructors();
for (Constructor<?> constructor : constructors) {
if(constructor.getParameterTypes().length == 1 &&
constructor.getParameterTypes()[0].isAssignableFrom(mixedIn.getClass())) {
final Object mixin;
try {
mixin = constructor.newInstance(mixedIn);
return (T) serviceRegistry.injectServicesInto(mixin);
} catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {
throw new NonRecoverableException(e);
}
}
}
// should never get here because of previous guards
throw new NonRecoverableException( String.format(
"Failed to locate constructor in %s to instantiate using %s", mixinClass.getName(), mixedIn));
}
@javax.inject.Inject
SpecificationLoader specificationLoader;
@javax.inject.Inject
ServiceRegistry serviceRegistry;
@javax.inject.Inject
PersistenceSessionServiceInternal persistenceSessionServiceInternal;
}