    001    // Copyright 2010, 2011 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
    015    package org.apache.tapestry5.internal.services.templates;
    016
    017    import org.apache.tapestry5.TapestryConstants;
    018    import org.apache.tapestry5.ioc.Resource;
    019    import org.apache.tapestry5.ioc.internal.util.InternalUtils;
    020    import org.apache.tapestry5.model.ComponentModel;
    021    import org.apache.tapestry5.services.ComponentClassResolver;
    022    import org.apache.tapestry5.services.templates.ComponentTemplateLocator;
    023
    024    import java.util.Locale;
    025
    026    /**
    027     * The special case for pages, where the template is searched for in the web application context.
    028     *
    029     * @since 5.2.0
    030     */
    031    public class PageTemplateLocator implements ComponentTemplateLocator
    032    {
    033        private final Resource contextRoot;
    034
    035        private final ComponentClassResolver resolver;
    036
    037        private final String prefix;
    038
    039        public PageTemplateLocator(Resource contextRoot, ComponentClassResolver resolver, String applicationFolder)
    040        {
    041            this.contextRoot = contextRoot;
    042            this.resolver = resolver;
    043
    044            prefix = applicationFolder.equals("") ? "" : applicationFolder + "/";
    045        }
    046
    047        public Resource locateTemplate(ComponentModel model, Locale locale)
    048        {
    049            if (!model.isPage())
    050            {
    051                return null;
    052            }
    053
    054            String className = model.getComponentClassName();
    055
    056            String logicalName = resolver.resolvePageClassNameToPageName(className);
    057
    058            int slashx = logicalName.lastIndexOf('/');
    059
    060            if (slashx > 0)
    061            {
    062                // However, the logical name isn't quite what we want. It may have been somewhat
    063                // trimmed.
    064
    065                String simpleClassName = InternalUtils.lastTerm(className);
    066
    067                logicalName = logicalName.substring(0, slashx + 1) + simpleClassName;
    068            }
    069
    070            String path = prefix + logicalName + "." + TapestryConstants.TEMPLATE_EXTENSION;
    071
    072            return contextRoot.forFile(path).forLocale(locale);
    073        }
    074
    075    }