/*
* 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.runtime.persistence.container;
import org.apache.isis.applib.services.bookmark.Bookmark;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
import org.apache.isis.core.metamodel.adapter.oid.Oid;
import org.apache.isis.core.metamodel.adapter.oid.RootOid;
import org.apache.isis.core.metamodel.adapter.oid.RootOidDefault;
import org.apache.isis.core.metamodel.services.ServicesInjectorSpi;
import org.apache.isis.core.runtime.system.context.IsisContext;
import org.apache.isis.core.runtime.system.persistence.PersistenceSession;
/**
* Helper class that encapsulates the processing performed by domain object
* containers that are performing a resolve.
*
* <p>
* Implementation note: rather than inject in its dependencies, we instead look
* up dependencies from the {@link IsisContext}. This is necessary, for the
* {@link PersistenceSession} at least, because class enhancers may hold a
* reference to the factory as part of the generated bytecode. Since the
* {@link PersistenceSession} could change over the lifetime of the instance (eg
* when using the {@link InMemoryObjectStore}), we must always look the
* {@link PersistenceSession} from the {@link IsisContext}. The same applies to
* the {@link ServicesInjectorSpi}.
*/
public class DomainObjectContainerResolve {
public DomainObjectContainerResolve() {
}
public Object lookup(final Bookmark bookmark) {
RootOid oid = RootOidDefault.create(bookmark);
final ObjectAdapter adapter = adapterFor(oid);
if(adapter == null) {
return null;
}
if (adapter.canTransitionToResolving()) {
getPersistenceSession().resolveImmediately(adapter);
}
return adapter.getObject();
}
public Bookmark bookmarkFor(Object domainObject) {
final ObjectAdapter adapter = adapterFor(domainObject);
final Oid oid = adapter.getOid();
if(oid == null) {
// values cannot be bookmarked
return null;
}
if(!(oid instanceof RootOid)) {
// must be root
return null;
}
final RootOid rootOid = (RootOid) oid;
return rootOid.asBookmark();
}
public void resolve(final Object parent) {
final ObjectAdapter adapter = adapterFor(parent);
if (adapter.canTransitionToResolving()) {
getPersistenceSession().resolveImmediately(adapter);
}
}
public void resolve(final Object parent, final Object field) {
if (field == null) {
resolve(parent);
}
}
private ObjectAdapter adapterFor(final Object object) {
return getAdapterManager().adapterFor(object);
}
private ObjectAdapter adapterFor(final RootOid oid) {
return getAdapterManager().adapterFor(oid);
}
// /////////////////////////////////////////////////////////////////
// Dependencies (looked up from context)
// /////////////////////////////////////////////////////////////////
protected PersistenceSession getPersistenceSession() {
return IsisContext.getPersistenceSession();
}
protected AdapterManager getAdapterManager() {
return getPersistenceSession().getAdapterManager();
}
}