001/*
002 * (C) Copyright 2006-2009 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Jean-Marc Orliaguet, Chalmers
018 *
019 * $Id$
020 */
021
022package org.nuxeo.theme.webengine.fm.extensions;
023
024import java.io.IOException;
025import java.io.Writer;
026import java.util.Map;
027
028import org.nuxeo.theme.html.ui.MVCElement;
029
030import freemarker.core.Environment;
031import freemarker.template.TemplateDirectiveBody;
032import freemarker.template.TemplateDirectiveModel;
033import freemarker.template.TemplateException;
034import freemarker.template.TemplateModel;
035import freemarker.template.TemplateModelException;
036
037/**
038 * @author <a href="mailto:jmo@chalmers.se">Jean-Marc Orliaguet</a>
039 */
040public abstract class NXThemesBaseMVC implements TemplateDirectiveModel {
041
042    public abstract String getClassName();
043
044    @SuppressWarnings("unchecked")
045    public void execute(Environment env, Map params, TemplateModel[] loopVars, TemplateDirectiveBody body)
046            throws TemplateException, IOException {
047
048        if (loopVars.length != 0) {
049            throw new TemplateModelException("This directive doesn't allow loop variables.");
050        }
051        if (body != null) {
052            throw new TemplateModelException("Didn't expect a body");
053        }
054
055        Writer writer = env.getOut();
056        Map<String, String> attributes = Utils.getTemplateDirectiveParameters(params);
057        attributes.put("className", getClassName());
058        writer.write(MVCElement.render(attributes));
059    }
060
061}