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.title;
021
022import java.lang.reflect.Method;
023import java.util.Collections;
024import java.util.List;
025
026import org.slf4j.Logger;
027import org.slf4j.LoggerFactory;
028
029import org.apache.isis.applib.profiles.Localization;
030import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
031import org.apache.isis.core.metamodel.adapter.util.AdapterInvokeUtils;
032import org.apache.isis.core.metamodel.facetapi.FacetHolder;
033import org.apache.isis.core.metamodel.facets.ImperativeFacet;
034import org.apache.isis.core.metamodel.facets.ImperativeFacet.Intent;
035import org.apache.isis.core.metamodel.facets.object.title.TitleFacetAbstract;
036
037public class TitleFacetViaTitleMethod extends TitleFacetAbstract implements ImperativeFacet {
038
039    private static final Logger LOG = LoggerFactory.getLogger(TitleFacetViaTitleMethod.class);
040    private final Method method;
041
042    public TitleFacetViaTitleMethod(final Method method, final FacetHolder holder) {
043        super(holder);
044        this.method = method;
045    }
046
047    /**
048     * Returns a singleton list of the {@link Method} provided in the
049     * constructor.
050     */
051    @Override
052    public List<Method> getMethods() {
053        return Collections.singletonList(method);
054    }
055
056    @Override
057    public Intent getIntent(final Method method) {
058        return Intent.UI_HINT;
059    }
060
061    @Override
062    public boolean impliesResolve() {
063        return true;
064    }
065
066    @Override
067    public boolean impliesObjectChanged() {
068        return false;
069    }
070
071    @Override
072    public String title(final ObjectAdapter owningAdapter, final Localization localization) {
073        try {
074            return (String) AdapterInvokeUtils.invoke(method, owningAdapter);
075        } catch (final RuntimeException ex) {
076            LOG.warn("title failure", ex);
077            return "Failed Title";
078        }
079    }
080
081}