    001// Licensed under the Apache License, Version 2.0 (the "License");
    002// you may not use this file except in compliance with the License.
    003// You may obtain a copy of the License at
    004//
    005// http://www.apache.org/licenses/LICENSE-2.0
    006//
    007// Unless required by applicable law or agreed to in writing, software
    008// distributed under the License is distributed on an "AS IS" BASIS,
    009// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    010// See the License for the specific language governing permissions and
    011// limitations under the License.
    012
    013package org.apache.tapestry5.internal.services.templates;
    014
    015import org.apache.tapestry5.TapestryConstants;
    016import org.apache.tapestry5.ioc.Resource;
    017import org.apache.tapestry5.ioc.internal.util.InternalUtils;
    018import org.apache.tapestry5.model.ComponentModel;
    019import org.apache.tapestry5.services.ComponentClassResolver;
    020import org.apache.tapestry5.services.templates.ComponentTemplateLocator;
    021
    022import java.util.Locale;
    023
    024/**
    025 * The special case for pages, where the template is searched for in the web application context.
    026 *
    027 * @since 5.2.0
    028 */
    029public class PageTemplateLocator implements ComponentTemplateLocator
    030{
    031    private final Resource contextRoot;
    032
    033    private final ComponentClassResolver resolver;
    034
    035    private final String prefix;
    036
    037    public PageTemplateLocator(Resource contextRoot, ComponentClassResolver resolver, String applicationFolder)
    038    {
    039        this.contextRoot = contextRoot;
    040        this.resolver = resolver;
    041
    042        prefix = applicationFolder.equals("") ? "" : applicationFolder + "/";
    043    }
    044
    045    public Resource locateTemplate(ComponentModel model, Locale locale)
    046    {
    047        if (!model.isPage())
    048        {
    049            return null;
    050        }
    051
    052        String className = model.getComponentClassName();
    053
    054        String logicalName = resolver.resolvePageClassNameToPageName(className);
    055
    056        String simpleClassName = InternalUtils.lastTerm(className);
    057
    058        int slashx = logicalName.lastIndexOf('/');
    059
    060        // Using the simple class name always accounts for the case where a "page" suffix was stripped off to form
    061        // the logical page name (and several other cases where the name was simplified in some way).
    062        String baseName = slashx < 0 ? simpleClassName : logicalName.substring(0, slashx + 1) + simpleClassName;
    063
    064        String path = prefix + baseName + "." + TapestryConstants.TEMPLATE_EXTENSION;
    065
    066        return contextRoot.forFile(path).forLocale(locale);
    067    }
    068
    069}