/*
* 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.restfulobjects.server.util;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.adapter.oid.Oid;
import org.apache.isis.core.metamodel.adapter.oid.OidMarshaller;
import org.apache.isis.core.metamodel.adapter.oid.RootOidDefault;
import org.apache.isis.core.metamodel.facets.object.viewmodel.ViewModelFacet;
import org.apache.isis.core.metamodel.spec.ObjectSpecId;
import org.apache.isis.core.metamodel.spec.ObjectSpecification;
import org.apache.isis.core.runtime.persistence.ObjectNotFoundException;
import org.apache.isis.core.runtime.persistence.PojoRecreationException;
import org.apache.isis.core.runtime.system.context.IsisContext;
import org.apache.isis.core.runtime.system.persistence.PersistenceSession;
import org.apache.isis.viewer.restfulobjects.rendering.RendererContext;
public final class OidUtils {
private OidUtils() {
}
/**
* @return {@code null} if not persistent and not a view model.
*/
public static ObjectAdapter getObjectAdapterElseNull(
final RendererContext rendererContext,
final String domainType, final String instanceIdEncoded) {
final String instanceIdUnencoded = UrlDecoderUtils.urlDecode(instanceIdEncoded);
String oidStrUnencoded = getOidMarshaller().joinAsOid(domainType, instanceIdUnencoded);
return getObjectAdapter(rendererContext, oidStrUnencoded);
}
/**
* see {@link #getObjectAdapterElseNull(org.apache.isis.viewer.restfulobjects.rendering.RendererContext, String, String)}
*/
public static ObjectAdapter getObjectAdapterElseNull(
final RendererContext rendererContext,
final String oidStrEncoded) {
String oidStrUnencoded = UrlDecoderUtils.urlDecode(oidStrEncoded);
return getObjectAdapter(rendererContext, oidStrUnencoded);
}
private static ObjectAdapter getObjectAdapter(
final RendererContext rendererContext,
final String oidStrUnencoded) {
RootOidDefault rootOid = RootOidDefault.deString(oidStrUnencoded, getOidMarshaller());
final ObjectSpecId specId = rootOid.getObjectSpecId();
final ObjectSpecification spec = IsisContext.getSpecificationLoader().lookupBySpecId(specId);
if(spec == null) {
// eg "NONEXISTENT:123"
return null;
}
// TODO: the logic to figure out which PersistenceSession API to call should be pushed down into PersistenceSession itself.
final PersistenceSession persistenceSession = rendererContext.getPersistenceSession();
if(spec.containsFacet(ViewModelFacet.class)) {
// this is a hack; the RO viewer when rendering the URL for the view model loses the "view model" indicator
// ("*") from the specId, meaning that the marshalling logic above in RootOidDefault.deString() creates an
// oid in the wrong state. The code below checks for this and recreates the oid with the current state of 'view model'
if(!rootOid.isViewModel()) {
rootOid = new RootOidDefault(rootOid.getObjectSpecId(), rootOid.getIdentifier(), Oid.State.VIEWMODEL);
}
try {
return persistenceSession.getAdapterManager().adapterFor(rootOid);
} catch(final ObjectNotFoundException ex) {
return null;
} catch(final PojoRecreationException ex) {
return null;
}
} else {
try {
ObjectAdapter objectAdapter = persistenceSession.loadObject(rootOid);
return objectAdapter.isTransient() ? null : objectAdapter;
} catch(final ObjectNotFoundException ex) {
return null;
}
}
}
private static OidMarshaller getOidMarshaller() {
return new OidMarshaller();
}
}