001/*
002 * (C) Copyright 2006-2011 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 *     bstefanescu
018 *
019 * $Id$
020 */
021
022package org.nuxeo.ecm.platform.rendering.wiki.extensions;
023
024import java.io.IOException;
025import java.io.StringReader;
026import java.io.StringWriter;
027import java.io.Writer;
028
029import org.nuxeo.ecm.platform.rendering.wiki.WikiMacro;
030import org.nuxeo.ecm.platform.rendering.wiki.WikiSerializerHandler;
031import org.wikimodel.wem.WikiParameters;
032
033import freemarker.core.Environment;
034import freemarker.template.Template;
035import freemarker.template.TemplateException;
036
037/**
038 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
039 */
040public class FreemarkerMacro implements WikiMacro {
041
042    @Override
043    public String getName() {
044        return "freemarker";
045    }
046
047    @Override
048    public void eval(WikiParameters params, String content, WikiSerializerHandler serializer) throws IOException,
049            TemplateException {
050        Environment env = serializer.getEnvironment();
051        if (env != null) {
052            Template tpl = new Template("inline", new StringReader(content), env.getConfiguration(),
053                    env.getTemplate().getEncoding());
054            @SuppressWarnings("resource") // not ours to close
055            Writer oldw = env.getOut();
056            Writer neww = new StringWriter();
057            try {
058                env.setOut(neww);
059                env.include(tpl);
060            } finally {
061                env.setOut(oldw);
062            }
063            serializer.getWriter().print(neww.toString());
064        }
065    }
066
067    @Override
068    public void evalInline(WikiParameters params, String content, WikiSerializerHandler serializer) throws IOException,
069            TemplateException {
070        eval(params, content, serializer);
071    }
072
073}