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    }