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.object.notpersistable;
021
022import org.apache.isis.applib.annotation.NotPersistable;
023import org.apache.isis.applib.events.UsabilityEvent;
024import org.apache.isis.core.metamodel.facetapi.FacetHolder;
025import org.apache.isis.core.metamodel.facets.object.notpersistable.NotPersistableFacetAbstract;
026import org.apache.isis.core.metamodel.interactions.UsabilityContext;
027
028public class NotPersistableFacetImpl extends NotPersistableFacetAbstract {
029
030    public NotPersistableFacetImpl(final NotPersistable.By value, final FacetHolder holder) {
031        super(value, holder);
032    }
033
034    @Override
035    public String disables(final UsabilityContext<? extends UsabilityEvent> ic) {
036        final NotPersistable.By initiatedBy = value();
037        if (initiatedBy == NotPersistable.By.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}