/*
* $Id$
*
* 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 com.opensymphony.xwork2.util.logging.Logger;
import com.opensymphony.xwork2.util.logging.LoggerFactory;
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 = LoggerFactory.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()
});
}
}