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.metamodel.facets.collections;
021
022import java.util.Collection;
023import java.util.Iterator;
024
025import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
026import org.apache.isis.core.metamodel.facetapi.FacetAbstract;
027import org.apache.isis.core.metamodel.facetapi.FacetHolder;
028import org.apache.isis.core.metamodel.facets.collections.modify.CollectionFacet;
029import org.apache.isis.core.metamodel.facets.typeof.TypeOfFacet;
030
031public abstract class CollectionFacetAbstract extends FacetAbstract implements CollectionFacet {
032
033    public CollectionFacetAbstract(final FacetHolder holder) {
034        super(CollectionFacet.class, holder, Derivation.NOT_DERIVED);
035    }
036
037    @Override
038    public final boolean contains(final ObjectAdapter collectionAdapter, final ObjectAdapter candidateObjectAdapter) {
039        final Collection<ObjectAdapter> collection = collection(collectionAdapter);
040        return collection.contains(candidateObjectAdapter);
041    }
042
043    @Override
044    public final Iterator<ObjectAdapter> iterator(final ObjectAdapter collectionAdapter) {
045        final Collection<ObjectAdapter> collection = collection(collectionAdapter);
046        return collection.iterator();
047    }
048
049    @Override
050    public Iterable<ObjectAdapter> iterable(final ObjectAdapter collectionAdapter) {
051        return new Iterable<ObjectAdapter>() {
052            @Override
053            public Iterator<ObjectAdapter> iterator() {
054                return CollectionFacetAbstract.this.iterator(collectionAdapter);
055            }
056        };
057    }
058
059    @Override
060    public final TypeOfFacet getTypeOfFacet() {
061        return getFacetHolder().getFacet(TypeOfFacet.class);
062    }
063
064}