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.value.booleans;
021    
022    import org.apache.isis.applib.adapters.EncoderDecoder;
023    import org.apache.isis.applib.adapters.Parser;
024    import org.apache.isis.core.commons.config.IsisConfiguration;
025    import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
026    import org.apache.isis.core.metamodel.facetapi.FacetHolder;
027    import org.apache.isis.core.progmodel.facets.object.value.ValueSemanticsProviderContext;
028    
029    public class BooleanWrapperValueSemanticsProvider extends BooleanValueSemanticsProviderAbstract {
030    
031        private static final Boolean DEFAULT_PROVIDER = Boolean.FALSE;
032    
033        /**
034         * Required because implementation of {@link Parser} and {@link EncoderDecoder}.
035         */
036        public BooleanWrapperValueSemanticsProvider() {
037            this(null, null, null);
038        }
039    
040        public BooleanWrapperValueSemanticsProvider(final FacetHolder holder, final IsisConfiguration configuration,
041            final ValueSemanticsProviderContext context) {
042            super(holder, Boolean.class, DEFAULT_PROVIDER, configuration, context);
043        }
044    
045        // //////////////////////////////////////////////////////////////////
046        // BooleanValueFacet impl
047        // //////////////////////////////////////////////////////////////////
048    
049        @Override
050        public void reset(final ObjectAdapter adapter) {
051            adapter.replacePojo(Boolean.FALSE);
052        }
053    
054        @Override
055        public void set(final ObjectAdapter adapter) {
056            adapter.replacePojo(Boolean.TRUE);
057        }
058    
059        @Override
060        public void toggle(final ObjectAdapter adapter) {
061            final Object currentObj = adapter.getObject();
062            if (currentObj == null) {
063                set(adapter);
064                return;
065            }
066            final boolean current = ((Boolean) currentObj).booleanValue();
067            final boolean toggled = !current;
068            adapter.replacePojo(Boolean.valueOf(toggled));
069        }
070    
071    }