/*
* 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.facets.collections.javautilcollection;
import java.util.Collection;
import java.util.Iterator;
import com.google.common.collect.Collections2;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
import org.apache.isis.core.metamodel.facetapi.FacetHolder;
import org.apache.isis.core.metamodel.facets.collections.CollectionFacetAbstract;
public class JavaCollectionFacet extends CollectionFacetAbstract {
private final AdapterManager adapterManager;
public JavaCollectionFacet(final FacetHolder holder, final AdapterManager adapterManager) {
super(holder);
this.adapterManager = adapterManager;
}
@Override
@SuppressWarnings("unchecked")
public Collection<ObjectAdapter> collection(final ObjectAdapter wrappedCollection) {
final Collection<?> collectionOfUnderlying = collectionOfUnderlying(wrappedCollection);
return Collections2.transform(collectionOfUnderlying, ObjectAdapter.Functions.adapterForUsing(getAdapterManager()));
}
@Override
public ObjectAdapter firstElement(final ObjectAdapter collection) {
final Iterator<ObjectAdapter> iterator = iterator(collection);
return iterator.hasNext() ? iterator.next() : null;
}
@Override
public int size(final ObjectAdapter collection) {
return collectionOfUnderlying(collection).size();
}
@Override
public void init(final ObjectAdapter collection, final ObjectAdapter[] initData) {
final Collection<? super Object> javaCollection = collectionOfUnderlying(collection);
javaCollection.clear();
for (final ObjectAdapter element : initData) {
final Object pojo = element.getObject();
javaCollection.add(pojo);
}
}
/**
* The underlying collection of objects (not {@link ObjectAdapter}s).
*/
@SuppressWarnings("unchecked")
private Collection<? super Object> collectionOfUnderlying(final ObjectAdapter wrappedCollection) {
return (Collection<? super Object>) wrappedCollection.getObject();
}
// //////////////////////////////////////////////////////////////////////
// Dependencies (from constructor)
// //////////////////////////////////////////////////////////////////////
private AdapterManager getAdapterManager() {
return adapterManager;
}
}