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    
020    package org.apache.isis.core.progmodel.facets.object.notpersistable;
021    
022    import org.apache.isis.applib.events.UsabilityEvent;
023    import org.apache.isis.core.metamodel.facetapi.FacetHolder;
024    import org.apache.isis.core.metamodel.facets.object.notpersistable.InitiatedBy;
025    import org.apache.isis.core.metamodel.facets.object.notpersistable.NotPersistableFacetAbstract;
026    import org.apache.isis.core.metamodel.interactions.UsabilityContext;
027    
028    public class NotPersistableFacetImpl extends NotPersistableFacetAbstract {
029    
030        public NotPersistableFacetImpl(final InitiatedBy value, final FacetHolder holder) {
031            super(value, holder);
032        }
033    
034        @Override
035        public String disables(final UsabilityContext<? extends UsabilityEvent> ic) {
036            final InitiatedBy initiatedBy = value();
037            if (initiatedBy == InitiatedBy.USER_OR_PROGRAM) {
038                // never persistable
039                return "Not persistable";
040            } else {
041                if (ic.isProgrammatic()) {
042                    // enabled only in this case
043                    return null;
044                } else {
045                    // not programmatic, ie by user, so disabled
046                    return "Not persistable";
047                }
048            }
049        }
050    
051    }