    001// Copyright 2011, 2012 The Apache Software Foundation
    002//
    003// Licensed under the Apache License, Version 2.0 (the "License");
    004// you may not use this file except in compliance with the License.
    005// You may obtain a copy of the License at
    006//
    007// http://www.apache.org/licenses/LICENSE-2.0
    008//
    009// Unless required by applicable law or agreed to in writing, software
    010// distributed under the License is distributed on an "AS IS" BASIS,
    011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012// See the License for the specific language governing permissions and
    013// limitations under the License.
    014
    015package org.apache.tapestry5.internal.pageload;
    016
    017import org.apache.tapestry5.commons.Resource;
    018import org.apache.tapestry5.func.F;
    019import org.apache.tapestry5.func.Mapper;
    020import org.apache.tapestry5.ioc.util.LocalizedNameGenerator;
    021import org.apache.tapestry5.model.ComponentModel;
    022import org.apache.tapestry5.services.pageload.ComponentResourceLocator;
    023import org.apache.tapestry5.services.pageload.ComponentResourceSelector;
    024import org.apache.tapestry5.services.templates.ComponentTemplateLocator;
    025
    026import java.util.Arrays;
    027import java.util.List;
    028
    029public class DefaultComponentResourceLocator implements ComponentResourceLocator
    030{
    031    private ComponentTemplateLocator componentTemplateLocator;
    032
    033    public DefaultComponentResourceLocator(ComponentTemplateLocator componentTemplateLocator)
    034    {
    035        this.componentTemplateLocator = componentTemplateLocator;
    036    }
    037
    038    public Resource locateTemplate(ComponentModel model, ComponentResourceSelector selector)
    039    {
    040        // For 5.2 compatibility, this implementation delegates to the older
    041        // ComponentTemplateLocator command chain. That may be removed in 5.4.
    042
    043        return componentTemplateLocator.locateTemplate(model, selector.locale);
    044    }
    045
    046    public List<Resource> locateMessageCatalog(final Resource baseResource, ComponentResourceSelector selector)
    047    {
    048        String baseName = baseResource.getFile();
    049
    050        // This is the case for some of the "virtual resources" introduced in 5.4
    051        if (baseName == null)
    052        {
    053            return Arrays.asList(baseResource.forLocale(selector.locale));
    054        }
    055
    056        return F.flow(new LocalizedNameGenerator(baseName, selector.locale).iterator()).map(new Mapper<String, Resource>()
    057        {
    058            public Resource map(String element)
    059            {
    060                return baseResource.forFile(element);
    061            }
    062        }).toList();
    063    }
    064
    065}