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.members.disable;
021    
022    import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
023    import org.apache.isis.core.metamodel.facetapi.FacetHolder;
024    import org.apache.isis.core.metamodel.facets.When;
025    
026    public class DisabledFacetImpl extends DisabledFacetAbstract {
027    
028        public DisabledFacetImpl(final When value, final FacetHolder holder) {
029            super(value, holder);
030        }
031    
032        @Override
033        public String disabledReason(final ObjectAdapter targetAdapter) {
034            if (value() == When.ALWAYS) {
035                return "Always disabled";
036            } else if (value() == When.NEVER) {
037                return null;
038            }
039    
040            // remaining tests depend upon the actual target in question
041            if (targetAdapter == null) {
042                return null;
043            }
044    
045            if (value() == When.UNTIL_PERSISTED) {
046                return targetAdapter.isTransient() ? "Disabled until persisted" : null;
047            } else if (value() == When.ONCE_PERSISTED) {
048                return targetAdapter.isPersistent() ? "Disabled once persisted" : null;
049            }
050            return null;
051        }
052    
053    }