LightPIT: src/main/java/de/uapcore/lightpit/Functions.java@835dd169642a

     1 /*

     2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

     3  *

     4  * Copyright 2018 Mike Becker. All rights reserved.

     5  *

     6  * Redistribution and use in source and binary forms, with or without

     7  * modification, are permitted provided that the following conditions are met:

     8  *

     9  *   1. Redistributions of source code must retain the above copyright

    10  *      notice, this list of conditions and the following disclaimer.

    11  *

    12  *   2. Redistributions in binary form must reproduce the above copyright

    13  *      notice, this list of conditions and the following disclaimer in the

    14  *      documentation and/or other materials provided with the distribution.

    15  *

    16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

    17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

    19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE

    20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

    23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

    24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

    26  * POSSIBILITY OF SUCH DAMAGE.

    27  *

    28  */

    29 package de.uapcore.lightpit;

    31 import org.slf4j.Logger;

    32 import org.slf4j.LoggerFactory;

    34 import javax.servlet.ServletContext;

    35 import javax.servlet.http.HttpServletRequest;

    36 import java.util.Optional;

    38 /**

    39  * Contains common static functions.

    40  */

    41 public final class Functions {

    43     private static final Logger LOG = LoggerFactory.getLogger(Functions.class);

    45     public static Optional<String[]> availableLanguages(ServletContext ctx) {

    46         return Optional.ofNullable(ctx.getInitParameter(Constants.CTX_ATTR_LANGUAGES)).map((x) -> x.split("\\s*,\\s*"));

    47     }

    49     public static String enforceExt(String filename, String ext) {

    50         return filename.endsWith(ext) ? filename : filename + ext;

    51     }

    53     public static String jspPath(String filename) {

    54         return enforceExt(Constants.JSP_PATH_PREFIX + filename, ".jsp");

    55     }

    57     public static String jspfPath(String filename) {

    58         return enforceExt(Constants.JSPF_PATH_PREFIX + filename, ".jspf");

    59     }

    61     public static String dynFragmentPath(String filename) {

    62         return enforceExt(Constants.DYN_FRAGMENT_PATH_PREFIX + filename, ".jsp");

    63     }

    65     public static String fqn(String base, String name) {

    66         return base + "." + name;

    67     }

    69     public static String fqn(Class<?> clazz, String name) {

    70         return fqn(clazz.getName(), name);

    71     }

    73     public static String fullPath(LightPITModule module, RequestMapping mapping) {

    74         StringBuilder sb = new StringBuilder();

    75         sb.append(module.modulePath());

    76         sb.append('/');

    77         if (!mapping.requestPath().isEmpty()) {

    78             sb.append(mapping.requestPath().isEmpty());

    79             sb.append('/');

    80         }

    81         return sb.toString();

    82     }

    84     public static String fullPath(HttpServletRequest req) {

    85         return req.getServletPath() + Optional.ofNullable(req.getPathInfo()).orElse("");

    86     }

    88     /**

    89      * Returns the module path of the given LightPIT Servlet module.

    90      * <p>

    91      * If you specify a malformed LightPIT servlet, which does not have a module

    92      * annotation, the path to the <code>/error/404.html</code> page is returned.

    93      *

    94      * @param clazz the servlet class

    95      * @return the module path

    96      */

    97     public static String modulePathOf(Class<? extends AbstractLightPITServlet> clazz) {

    98         Optional<LightPITModule> moduleInfo = Optional.ofNullable(clazz.getAnnotation(LightPITModule.class));

    99         if (moduleInfo.isPresent()) {

   100             return moduleInfo.get().modulePath();

   101         } else {

   102             LOG.warn(

   103                     "{} is a LightPIT Servlet but is missing the module annotation.",

   104                     clazz.getName()

   105             );

   106             return "/error/404.html";

   107         }

   108     }

   110     /**

   111      * This class is not instantiatable.

   112      */

   113     private Functions() {

   114     }

   115 }

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