001/*
002 * (C) Copyright 2006-2008 Nuxeo SAS (http://nuxeo.com/) and contributors.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     bstefanescu
016 *
017 * $Id$
018 */
019
020package org.nuxeo.ecm.webengine.rendering;
021
022import java.io.IOException;
023import java.util.Map;
024
025import org.nuxeo.ecm.webengine.WebEngine;
026import org.nuxeo.ecm.webengine.model.WebContext;
027import org.nuxeo.ecm.webengine.model.impl.AbstractWebContext;
028import org.nuxeo.ecm.webengine.scripting.ScriptFile;
029
030import freemarker.core.Environment;
031import freemarker.template.SimpleScalar;
032import freemarker.template.Template;
033import freemarker.template.TemplateDirectiveBody;
034import freemarker.template.TemplateDirectiveModel;
035import freemarker.template.TemplateException;
036import freemarker.template.TemplateModel;
037import freemarker.template.TemplateModelException;
038
039/**
040 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
041 */
042public class RenderDirective implements TemplateDirectiveModel {
043
044    public void execute(Environment env, Map params, TemplateModel[] loopVars, TemplateDirectiveBody body)
045            throws TemplateException, IOException {
046        int size = params.size();
047        if (size != 1) {
048            throw new TemplateModelException("Invalid number of arguments for render(...) method");
049        }
050
051        SimpleScalar val = (SimpleScalar) params.get("src");
052        if (val == null) {
053            throw new TemplateModelException("src attribute is required");
054        }
055        String src = val.getAsString();
056
057        WebContext ctx = WebEngine.getActiveContext();
058        if (ctx != null) {
059            ScriptFile script = ctx.getFile(src);
060            Template tpl = env.getConfiguration().getTemplate(script.getURL());
061            try {
062                ((AbstractWebContext) ctx).pushScriptFile(script.getFile());
063                env.include(tpl);
064            } finally {
065                ((AbstractWebContext) ctx).popScriptFile();
066            }
067        } else {
068            throw new IllegalStateException("Not In a Web Context");
069        }
070    }
071
072}