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.object.immutable;
021
022import org.apache.isis.applib.annotation.When;
023import org.apache.isis.core.metamodel.spec.ObjectSpecification;
024
025public class ImmutableFacetUtils {
026
027    public static boolean isAlwaysImmutable(final ObjectSpecification specification) {
028        // this is a workaround for a dubious test
029        if (specification == null) {
030            return false;
031        }
032
033        final ImmutableFacet immutableFacet = specification.getFacet(ImmutableFacet.class);
034        if (immutableFacet == null) {
035            return false;
036        }
037        return immutableFacet.when() == When.ALWAYS;
038    }
039
040    public static boolean isImmutableOncePersisted(final ObjectSpecification specification) {
041        // this is a workaround for a dubious test
042        if (specification == null) {
043            return false;
044        }
045
046        final ImmutableFacet immutableFacet = specification.getFacet(ImmutableFacet.class);
047        if (immutableFacet == null) {
048            return false;
049        }
050        return immutableFacet.when() == When.ONCE_PERSISTED;
051    }
052
053    private ImmutableFacetUtils() {
054    }
055}