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.value.booleans;
021
022import org.apache.isis.applib.adapters.EncoderDecoder;
023import org.apache.isis.applib.adapters.Parser;
024import org.apache.isis.core.commons.config.IsisConfiguration;
025import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
026import org.apache.isis.core.metamodel.facetapi.FacetHolder;
027import org.apache.isis.core.progmodel.facets.object.value.ValueSemanticsProviderContext;
028
029public class BooleanWrapperValueSemanticsProvider extends BooleanValueSemanticsProviderAbstract {
030
031    private static final Boolean DEFAULT_PROVIDER = Boolean.FALSE;
032
033    /**
034     * Required because implementation of {@link Parser} and
035     * {@link EncoderDecoder}.
036     */
037    public BooleanWrapperValueSemanticsProvider() {
038        this(null, null, null);
039    }
040
041    public BooleanWrapperValueSemanticsProvider(final FacetHolder holder, final IsisConfiguration configuration, 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}