001    /**
002     * Copyright (c) 2000-2012 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.velocity;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    import com.liferay.portal.kernel.servlet.ServletContextPool;
020    import com.liferay.portal.kernel.template.TemplateConstants;
021    import com.liferay.portal.kernel.util.Validator;
022    import com.liferay.portal.template.URLResourceParser;
023    import com.liferay.portal.util.PortalUtil;
024    
025    import java.io.IOException;
026    
027    import java.net.URL;
028    
029    import javax.servlet.ServletContext;
030    
031    /**
032     * @author Alexander Chow
033     * @author Raymond Augé
034     */
035    public class VelocityServletResourceParser extends URLResourceParser {
036    
037            @Override
038            public URL getURL(String source) throws IOException {
039                    int pos = source.indexOf(TemplateConstants.SERVLET_SEPARATOR);
040    
041                    if (pos == -1) {
042                            return null;
043                    }
044    
045                    String servletContextName = source.substring(0, pos);
046    
047                    if (Validator.isNull(servletContextName)) {
048                            servletContextName = PortalUtil.getPathContext();
049                    }
050    
051                    ServletContext servletContext = ServletContextPool.get(
052                            servletContextName);
053    
054                    if (servletContext == null) {
055                            _log.error(
056                                    source + " is not valid because " + servletContextName +
057                                            " does not map to a servlet context");
058    
059                            return null;
060                    }
061    
062                    String name = source.substring(
063                            pos + TemplateConstants.SERVLET_SEPARATOR.length());
064    
065                    if (_log.isDebugEnabled()) {
066                            _log.debug(
067                                    name + " is associated with the servlet context " +
068                                            servletContextName + " " + servletContext);
069                    }
070    
071                    URL url = servletContext.getResource(name);
072    
073                    if ((url == null) && name.endsWith("/init_custom.vm")) {
074                            if (_log.isWarnEnabled()) {
075                                    _log.warn("The template " + name + " should be created");
076                            }
077    
078                            String portalServletContextName = PortalUtil.getPathContext();
079    
080                            ServletContext portalServletContext = ServletContextPool.get(
081                                    portalServletContextName);
082    
083                            url = portalServletContext.getResource(
084                                    "/html/themes/_unstyled/template/init_custom.vm");
085                    }
086    
087                    return url;
088            }
089    
090            private static Log _log = LogFactoryUtil.getLog(
091                    VelocityServletResourceParser.class);
092    
093    }