/*
* 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.viewer.bdd.common.components;
import java.util.Map;
import com.google.common.collect.Iterables;
import com.google.common.collect.Maps;
import org.apache.isis.core.commons.exceptions.IsisException;
import org.apache.isis.core.metamodel.adapter.oid.Oid;
import org.apache.isis.core.metamodel.facets.object.cached.CachedFacet;
import org.apache.isis.core.metamodel.spec.ObjectSpecId;
import org.apache.isis.core.metamodel.spec.ObjectSpecification;
import org.apache.isis.core.objectstore.internal.ObjectStoreInstances;
import org.apache.isis.core.objectstore.internal.ObjectStorePersistedObjects;
import org.apache.isis.core.runtime.system.persistence.IdentifierGeneratorDefault.Memento;
/**
* Stores instances in one of two maps, based on whether have their
* specification has the {@link CachedFacet} (represents cached or reference
* data) or not (represents operational data).
* <p>
* Those that are cached are stored in a <tt>static</tt> map that is never
* {@link #clear()}ed down. Those that are operational go in a regular instance
* cache and can be {@link #clear()}ed.
*/
public class BddObjectStorePersistedObjects implements ObjectStorePersistedObjects {
private static final Map<ObjectSpecification, ObjectStoreInstances> cachedInstancesBySpecMap = Maps.newHashMap();
private final Map<ObjectSpecification, ObjectStoreInstances> operationalInstancesBySpecMap = Maps.newHashMap();
private final Map<ObjectSpecId, Oid> serviceOidByIdMap = Maps.newHashMap();
private Memento oidGeneratorMemento;
@Override
public Memento getOidGeneratorMemento() {
return oidGeneratorMemento;
}
@Override
public void saveOidGeneratorMemento(final Memento memento) {
this.oidGeneratorMemento = memento;
}
@Override
public Oid getService(final ObjectSpecId objectSpecId) {
return serviceOidByIdMap.get(objectSpecId);
}
@Override
public void registerService(final ObjectSpecId objectSpecId, final Oid oid) {
final Oid oidLookedUpByName = serviceOidByIdMap.get(objectSpecId);
if (oidLookedUpByName != null) {
if (!oidLookedUpByName.equals(oid)) {
throw new IsisException("Already another service registered as name: " + objectSpecId + " (existing Oid: " + oidLookedUpByName + ", " + "intended: " + oid + ")");
}
} else {
serviceOidByIdMap.put(objectSpecId, oid);
}
}
@Override
public Iterable<ObjectSpecification> specifications() {
return Iterables.concat(BddObjectStorePersistedObjects.cachedInstancesBySpecMap.keySet(), operationalInstancesBySpecMap.keySet());
}
@Override
public Iterable<ObjectStoreInstances> instances() {
return Iterables.concat(BddObjectStorePersistedObjects.cachedInstancesBySpecMap.values(), operationalInstancesBySpecMap.values());
}
@Override
public ObjectStoreInstances instancesFor(final ObjectSpecification spec) {
if (isCached(spec)) {
return getFromMap(spec, BddObjectStorePersistedObjects.cachedInstancesBySpecMap);
} else {
return getFromMap(spec, operationalInstancesBySpecMap);
}
}
// //////////////////////////////////////////////////////////////////
// Helpers
// //////////////////////////////////////////////////////////////////
private ObjectStoreInstances getFromMap(final ObjectSpecification spec, final Map<ObjectSpecification, ObjectStoreInstances> map) {
ObjectStoreInstances ins = map.get(spec);
if (ins == null) {
ins = new ObjectStoreInstances(spec);
map.put(spec, ins);
}
return ins;
}
private boolean isCached(final ObjectSpecification spec) {
return spec.containsFacet(CachedFacet.class);
}
/**
* Only clears the operational instances, not the cached instances.
*/
@Override
public void clear() {
operationalInstancesBySpecMap.clear();
}
}