/*
* 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.sling.scripting.thymeleaf.impl;
import java.io.Reader;
import java.util.Locale;
import javax.script.Bindings;
import javax.script.ScriptContext;
import javax.script.ScriptException;
import javax.servlet.ServletContext;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.scripting.SlingBindings;
import org.apache.sling.api.scripting.SlingScriptHelper;
import org.apache.sling.scripting.api.AbstractSlingScriptEngine;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.thymeleaf.context.IContext;
public class ThymeleafScriptEngine extends AbstractSlingScriptEngine {
private final ThymeleafScriptEngineFactory thymeleafScriptEngineFactory;
private final Logger logger = LoggerFactory.getLogger(ThymeleafScriptEngine.class);
public ThymeleafScriptEngine(final ThymeleafScriptEngineFactory thymeleafScriptEngineFactory) {
super(thymeleafScriptEngineFactory);
this.thymeleafScriptEngineFactory = thymeleafScriptEngineFactory;
}
@Override
public Object eval(final Reader reader, final ScriptContext scriptContext) throws ScriptException {
final Bindings bindings = scriptContext.getBindings(ScriptContext.ENGINE_SCOPE);
final SlingScriptHelper helper = (SlingScriptHelper) bindings.get(SlingBindings.SLING);
if (helper == null) {
throw new ScriptException("SlingScriptHelper missing from bindings");
}
final SlingHttpServletRequest request = helper.getRequest();
final SlingHttpServletResponse response = helper.getResponse();
final ServletContext servletContext = null; // only used by Thymeleaf's ServletContextResourceResolver
final Locale locale = helper.getResponse().getLocale();
final String scriptName = helper.getScript().getScriptResource().getPath();
try {
final IContext context = new SlingWebContext(request, response, servletContext, locale, bindings);
thymeleafScriptEngineFactory.getTemplateEngine().process(scriptName, context, scriptContext.getWriter());
} catch (Exception e) {
logger.error("Failure rendering Thymeleaf template '{}': {}", scriptName, e.getMessage());
throw new ScriptException(e);
}
return null;
}
}