/* | |
* Licensed to the Apache Software Foundation (ASF) under one | |
* or more contributor license agreements. See the NOTICE file | |
* distributed with this work for additional information | |
* regarding copyright ownership. The ASF licenses this file | |
* to you under the Apache License, Version 2.0 (the | |
* "License"); you may not use this file except in compliance | |
* with the License. You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, | |
* software distributed under the License is distributed on an | |
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
* KIND, either express or implied. See the License for the | |
* specific language governing permissions and limitations | |
* under the License. | |
*/ | |
package org.apache.struts2.osgi; | |
import org.apache.logging.log4j.Logger; | |
import org.apache.logging.log4j.LogManager; | |
import freemarker.cache.ClassTemplateLoader; | |
import freemarker.cache.FileTemplateLoader; | |
import freemarker.cache.MultiTemplateLoader; | |
import freemarker.cache.TemplateLoader; | |
import freemarker.cache.WebappTemplateLoader; | |
import org.apache.struts2.osgi.loaders.FreeMarkerBundleResourceLoader; | |
import org.apache.struts2.views.freemarker.FreemarkerManager; | |
import org.apache.struts2.views.freemarker.StrutsClassTemplateLoader; | |
import javax.servlet.ServletContext; | |
import java.io.File; | |
import java.io.IOException; | |
import java.net.URI; | |
/** | |
* This class extends FreemarkerManager in core to add a template loader | |
* (that finds resources inside bundles) to MultiTemplateLoader | |
*/ | |
public class BundleFreemarkerManager extends FreemarkerManager { | |
private static final Logger LOG = LogManager.getLogger(BundleFreemarkerManager.class); | |
protected TemplateLoader createTemplateLoader(ServletContext servletContext, String templatePath) { | |
TemplateLoader templatePathLoader = null; | |
try { | |
if (templatePath.startsWith("class://")) { | |
// substring(7) is intentional as we "reuse" the last slash | |
templatePathLoader = new ClassTemplateLoader(getClass(), templatePath.substring(7)); | |
} else if (templatePath.startsWith("file://")) { | |
templatePathLoader = new FileTemplateLoader(new File(URI.create(templatePath))); | |
} | |
} catch (IOException e) { | |
LOG.error("Invalid template path specified: " + e.getMessage(), e); | |
} | |
// presume that most apps will require the class and webapp template loader | |
// if people wish to | |
return templatePathLoader != null ? | |
new MultiTemplateLoader(new TemplateLoader[]{ | |
templatePathLoader, | |
new WebappTemplateLoader(servletContext), | |
new StrutsClassTemplateLoader(), | |
new FreeMarkerBundleResourceLoader() | |
}) | |
: new MultiTemplateLoader(new TemplateLoader[]{ | |
new WebappTemplateLoader(servletContext), | |
new StrutsClassTemplateLoader(), | |
new FreeMarkerBundleResourceLoader() | |
}); | |
} | |
} |