PathHelper.java

/**
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *   
 *   http://www.apache.org/licenses/LICENSE-2.0
 *   
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.

 * The original file does not contain a license statement. The license file in the projects
 * top-level directory states the files are under the Apache License 2.0:
 * 
 *   http://resteasy.svn.sourceforge.net/viewvc/resteasy/tags/RESTEASY_JAXRS_2_2_3_GA/
 *   License.html?revision=1542&content-type=text%2Fplain
 * 
 * Original location: 
 * 
 *   http://resteasy.svn.sourceforge.net/viewvc/resteasy/tags/RESTEASY_JAXRS_2_2_3_GA/
 *   resteasy-jaxrs/src/main/java/org/jboss/resteasy/util/PathHelper.java
 *   ?revision=1542&content-type=text%2Fplain
 */
package org.dkpro.lab.resteasy;

import java.util.regex.Pattern;


/**
 * A utility class for handling URI template parameters. As the Java
 * regulare expressions package does not handle named groups, this
 * class attempts to simulate that functionality by using groups.
 *
 * @author Ryan J. McDonough
 * @author Bill Burke
 * @since 1.0
 *        Nov 8, 2006
 */
public class PathHelper
{
   public static final String URI_PARAM_NAME_REGEX = "\\w[\\w\\.-]*";
   public static final String URI_PARAM_REGEX_REGEX = "[^{}][^{}]*";
   public static final String URI_PARAM_REGEX = "\\{\\s*(" + URI_PARAM_NAME_REGEX + ")\\s*(:\\s*(" + URI_PARAM_REGEX_REGEX + "))?\\}";
   public static final String URI_PARAM_WITH_REGEX = "\\{\\s*(" + URI_PARAM_NAME_REGEX + ")\\s*(:\\s*(" + URI_PARAM_REGEX_REGEX + "))\\}";
   public static final String URI_PARAM_WITHOUT_REGEX = "\\{(" + URI_PARAM_NAME_REGEX + ")\\}";
   public static final Pattern URI_PARAM_PATTERN = Pattern.compile(URI_PARAM_REGEX);
   public static final Pattern URI_PARAM_WITH_REGEX_PATTERN = Pattern.compile(URI_PARAM_WITH_REGEX);
   public static final Pattern URI_PARAM_WITHOUT_REGEX_PATTERN = Pattern.compile(URI_PARAM_WITHOUT_REGEX);

   /**
    * A regex pattern that searches for a URI template parameter in the form of {*}
    */
   public static final Pattern URI_TEMPLATE_PATTERN = Pattern.compile("(\\{([^}]+)\\})");

   public static final String URI_TEMPLATE_REPLACE_PATTERN = "(.*?)";


   public static String getEncodedPathInfo(String path, String contextPath)
   {
      if (contextPath != null && !"".equals(contextPath) && path.startsWith(contextPath))
      {
         path = path.substring(contextPath.length());
      }
      return path;

   }

   public static final char openCurlyReplacement = 6;
   public static final char closeCurlyReplacement = 7;

   public static String replaceEnclosedCurlyBraces(String str)
   {
      char[] chars = str.toCharArray();
      int open = 0;
      for (int i = 0; i < chars.length; i++)
      {
         if (chars[i] == '{')
         {
            if (open != 0) chars[i] = openCurlyReplacement;
            open++;
         }
         else if (chars[i] == '}')
         {
            open--;
            if (open != 0)
            {
               chars[i] = closeCurlyReplacement;
            }
         }
      }
      return new String(chars);
   }

   public static String recoverEnclosedCurlyBraces(String str)
   {
      return str.replace(openCurlyReplacement, '{').replace(closeCurlyReplacement, '}');
   }

}