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.bounded;
021    
022    import org.apache.isis.applib.events.UsabilityEvent;
023    import org.apache.isis.applib.events.ValidityEvent;
024    import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
025    import org.apache.isis.core.metamodel.facetapi.Facet;
026    import org.apache.isis.core.metamodel.facetapi.FacetHolder;
027    import org.apache.isis.core.metamodel.facets.MarkerFacetAbstract;
028    import org.apache.isis.core.metamodel.facets.object.bounded.BoundedFacet;
029    import org.apache.isis.core.metamodel.interactions.ObjectValidityContext;
030    import org.apache.isis.core.metamodel.interactions.UsabilityContext;
031    import org.apache.isis.core.metamodel.interactions.ValidityContext;
032    
033    public abstract class BoundedFacetAbstract extends MarkerFacetAbstract implements BoundedFacet {
034    
035        public static Class<? extends Facet> type() {
036            return BoundedFacet.class;
037        }
038    
039        public BoundedFacetAbstract(final FacetHolder holder) {
040            super(type(), holder);
041        }
042    
043        /**
044         * Hook method for subclasses to override.
045         */
046        public abstract String disabledReason(ObjectAdapter no);
047    
048        @Override
049        public String invalidates(final ValidityContext<? extends ValidityEvent> context) {
050            if (!(context instanceof ObjectValidityContext)) {
051                return null;
052            }
053            final ObjectAdapter target = context.getTarget();
054            return disabledReason(target);
055        }
056    
057        @Override
058        public String disables(final UsabilityContext<? extends UsabilityEvent> context) {
059            final ObjectAdapter target = context.getTarget();
060            return disabledReason(target);
061        }
062    
063    }