From 6d06fe6ecad3f7e866f08dff8cd3957892e3304a Mon Sep 17 00:00:00 2001
From: lresende <lresende@13f79535-47bb-0310-9956-ffa450edef68>
Date: Sat, 1 Jan 2011 23:22:25 +0000
Subject: Adding java doc

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1054316 13f79535-47bb-0310-9956-ffa450edef68
---
 .../apache/tuscany/sca/common/http/HTTPUtil.java   | 43 ++++++++++++----------
 1 file changed, 24 insertions(+), 19 deletions(-)

diff --git a/sca-java-2.x/trunk/modules/common-http/src/main/java/org/apache/tuscany/sca/common/http/HTTPUtil.java b/sca-java-2.x/trunk/modules/common-http/src/main/java/org/apache/tuscany/sca/common/http/HTTPUtil.java
index f810970869..a3dede88ec 100644
--- a/sca-java-2.x/trunk/modules/common-http/src/main/java/org/apache/tuscany/sca/common/http/HTTPUtil.java
+++ b/sca-java-2.x/trunk/modules/common-http/src/main/java/org/apache/tuscany/sca/common/http/HTTPUtil.java
@@ -6,15 +6,15 @@
  * to you 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.    
+ * under the License.
  */
 
 package org.apache.tuscany.sca.common.http;
@@ -25,17 +25,17 @@ import java.security.MessageDigest;
 import javax.servlet.http.HttpServletRequest;
 
 /**
- * 
+ *
  *  @tuscany.spi.extension.asclient
  *
  */
 public class HTTPUtil {
 
     /**
-     * Calculate the relative request path taking in consideration if 
+     * Calculate the relative request path taking in consideration if
      * the application is running in a embedded webContatiner or from
      * within a web application server host environment
-     * 
+     *
      * @param request The http request
      * @return the relative path
      */
@@ -44,37 +44,42 @@ public class HTTPUtil {
         String contextPath = request.getContextPath();
         String servletPath = request.getServletPath();
         String requestURI = request.getRequestURI();
-        
+
         int contextPathLength = contextPath.length();
         int servletPathLenght = servletPath.contains(contextPath) ? servletPath.length() - contextPath.length() : servletPath.length();
-        
+
         String requestPath = requestURI.substring(contextPathLength + servletPathLenght);
-        
+
         return requestPath;
     }
-    
+
     /**
-     * Calculate the context root for an application taking in consideration if 
+     * Calculate the context root for an application taking in consideration if
      * the application is running in a embedded webContatiner or from
-     * within a web application server host environment. 
-     * 
+     * within a web application server host environment.
+     *
      * In the case of webContainer the contextRoot will always be a empty string.
-     * 
+     *
      * @param request The http request
      * @return the contextRoot
-     */    
+     */
     public static String getContextRoot(HttpServletRequest request) {
         // Get the request path
         String contextPath = request.getContextPath();
         String requestURI = request.getRequestURI();
-        
+
         int contextPathLength = contextPath.length();
-        
+
         String contextRoot = requestURI.substring(0, contextPathLength);
-        
+
         return contextRoot;
     }
-    
+
+    /**
+     * Calculate the ETag using MD5 Hash Algorithm
+     * @param content the content to hash
+     * @return
+     */
     public static String calculateHashETag(byte[] content) {
             String eTag = "invalid";
             try {
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