001/*
002 * (C) Copyright 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 * Contributors:
016 * Nuxeo - initial API and implementation
017 */
018
019package org.nuxeo.ecm.user.invite;
020
021import java.io.File;
022import java.net.URL;
023
024import freemarker.template.Configuration;
025import org.nuxeo.ecm.platform.rendering.api.ResourceLocator;
026import org.nuxeo.ecm.platform.rendering.fm.FreemarkerEngine;
027
028
029public class RenderingHelper {
030
031    protected volatile FreemarkerEngine engine;
032
033    protected class CLResourceLocator implements ResourceLocator {
034        @Override
035        public File getResourceFile(String key) {
036            return null;
037        }
038
039        @Override
040        public URL getResourceURL(String key) {
041            return this.getClass().getClassLoader().getResource(key);
042        }
043    }
044
045    public FreemarkerEngine getRenderingEngine() {
046        if (engine == null) {
047            synchronized (this) {
048                if (engine == null) {
049                    FreemarkerEngine fme = new FreemarkerEngine();
050                    fme.setResourceLocator(new CLResourceLocator());
051                    engine = fme;
052                }
053            }
054        }
055        return engine;
056    }
057
058    public Configuration getEngineConfiguration() {
059        return getRenderingEngine().getConfiguration();
060    }
061
062}