/*
* 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.wicket.model.mementos;
import java.io.Serializable;
import org.apache.isis.core.metamodel.spec.ObjectSpecId;
import org.apache.isis.core.metamodel.spec.ObjectSpecification;
import org.apache.isis.core.metamodel.spec.feature.OneToManyAssociation;
import org.apache.isis.core.metamodel.specloader.SpecificationLoader;
import org.apache.isis.core.runtime.system.session.IsisSessionFactory;
/**
* {@link Serializable} representation of a {@link OneToManyAssociation} (a
* parented collection of entities).
*/
public class CollectionMemento implements Serializable {
private static final long serialVersionUID = 1L;
private static ObjectSpecification owningSpecFor(
final OneToManyAssociation association,
final IsisSessionFactory isisSessionFactory) {
final SpecificationLoader specificationLoader = isisSessionFactory.getSpecificationLoader();
return specificationLoader.loadSpecification(association.getIdentifier().toClassIdentityString());
}
private final ObjectSpecId owningType;
private final String id;
private transient OneToManyAssociation collection;
public CollectionMemento(
final ObjectSpecId owningType,
final String id, final SpecificationLoader specificationLoader) {
this(owningType, id, collectionFor(owningType, id, specificationLoader));
}
public CollectionMemento(final OneToManyAssociation collection, final IsisSessionFactory isisSessionFactory) {
this(owningSpecFor(collection, isisSessionFactory).getSpecId(), collection.getIdentifier().toNameIdentityString(), collection);
}
private CollectionMemento(final ObjectSpecId owningType, final String id, final OneToManyAssociation collection) {
this.owningType = owningType;
this.id = id;
this.collection = collection;
}
public ObjectSpecId getOwningType() {
return owningType;
}
/**
* Only applies to parented collections, being the id of the collection in
* the parent (eg <tt>lineItems</tt>).
*
* <p>
* Will return <tt>null</tt> otherwise.
*/
public String getId() {
return id;
}
public String getName(final SpecificationLoader specificationLoader) {
return getCollection(specificationLoader).getName();
}
public OneToManyAssociation getCollection(final SpecificationLoader specificationLoader) {
if (collection == null) {
collection = collectionFor(owningType, id, specificationLoader);
}
return collection;
}
private static OneToManyAssociation collectionFor(
ObjectSpecId owningType,
String id,
final SpecificationLoader specificationLoader) {
return (OneToManyAssociation) SpecUtils.getSpecificationFor(owningType, specificationLoader).getAssociation(id);
}
}