001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one
003 *  or more contributor license agreements.  See the NOTICE file
004 *  distributed with this work for additional information
005 *  regarding copyright ownership.  The ASF licenses this file
006 *  to you under the Apache License, Version 2.0 (the
007 *  "License"); you may not use this file except in compliance
008 *  with the License.  You may obtain a copy of the License at
009 *
010 *        http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *  Unless required by applicable law or agreed to in writing,
013 *  software distributed under the License is distributed on an
014 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *  KIND, either express or implied.  See the License for the
016 *  specific language governing permissions and limitations
017 *  under the License.
018 */
019
020package org.apache.isis.core.progmodel.facets.collections.collection;
021
022import java.util.ArrayList;
023import java.util.Collection;
024
025import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
026import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
027import org.apache.isis.core.metamodel.facetapi.FacetHolder;
028import org.apache.isis.core.metamodel.facets.collections.CollectionFacetAbstract;
029
030public class JavaArrayFacet extends CollectionFacetAbstract {
031
032    private final AdapterManager adapterManager;
033
034    public JavaArrayFacet(final FacetHolder holder, final AdapterManager adapterManager) {
035        super(holder);
036        this.adapterManager = adapterManager;
037    }
038
039    /**
040     * Expected to be called with a {@link ObjectAdapter} wrapping an array.
041     */
042    @Override
043    public void init(final ObjectAdapter collectionAdapter, final ObjectAdapter[] initData) {
044        final int length = initData.length;
045        final Object[] array = new Object[length];
046        for (int i = 0; i < length; i++) {
047            array[i] = initData[i].getObject();
048        }
049        collectionAdapter.replacePojo(array);
050    }
051
052    /**
053     * Expected to be called with a {@link ObjectAdapter} wrapping an array.
054     */
055    @Override
056    public Collection<ObjectAdapter> collection(final ObjectAdapter collectionAdapter) {
057        final Object[] array = array(collectionAdapter);
058        final ArrayList<ObjectAdapter> objectCollection = new ArrayList<ObjectAdapter>(array.length);
059        for (final Object element2 : array) {
060            final ObjectAdapter element = getAdapterManager().getAdapterFor(element2);
061            objectCollection.add(element);
062        }
063        return objectCollection;
064    }
065
066    /**
067     * Expected to be called with a {@link ObjectAdapter} wrapping an array.
068     */
069    @Override
070    public ObjectAdapter firstElement(final ObjectAdapter collectionAdapter) {
071        final Object[] array = array(collectionAdapter);
072        return array.length > 0 ? getAdapterManager().getAdapterFor(array[0]) : null;
073    }
074
075    /**
076     * Expected to be called with a {@link ObjectAdapter} wrapping an array.
077     */
078    @Override
079    public int size(final ObjectAdapter collectionAdapter) {
080        return array(collectionAdapter).length;
081    }
082
083    private Object[] array(final ObjectAdapter collectionAdapter) {
084        return (Object[]) collectionAdapter.getObject();
085    }
086
087    // /////////////////////////////////////////////////////
088    // Dependencies (from constructor)
089    // /////////////////////////////////////////////////////
090
091    private AdapterManager getAdapterManager() {
092        return adapterManager;
093    }
094
095}