1 files changed, 81 insertions, 0 deletions
diff --git a/src/org/apache/http/cookie/CookiePathComparator.java b/src/org/apache/http/cookie/CookiePathComparator.java
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+++ b/src/org/apache/http/cookie/CookiePathComparator.java
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+/*
+ * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/cookie/CookiePathComparator.java $
+ * $Revision: 653041 $
+ * $Date: 2008-05-03 03:39:28 -0700 (Sat, 03 May 2008) $
+ *
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * 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.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+
+package org.apache.http.cookie;
+
+import java.io.Serializable;
+import java.util.Comparator;
+
+/**
+ * This cookie comparator ensures that multiple cookies satisfying 
+ * a common criteria are ordered in the <tt>Cookie</tt> header such
+ * that those with more specific Path attributes precede those with
+ * less specific.
+ *  
+ * <p>
+ * This comparator assumes that Path attributes of two cookies 
+ * path-match a commmon request-URI. Otherwise, the result of the
+ * comparison is undefined.
+ * </p>
+ * 
+ * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
+ */
+public class CookiePathComparator implements Serializable, Comparator<Cookie> {
+
+    private static final long serialVersionUID = 7523645369616405818L;
+
+    private String normalizePath(final Cookie cookie) {
+        String path = cookie.getPath();
+        if (path == null) {
+            path = "/";
+        }
+        if (!path.endsWith("/")) {
+            path = path + '/';
+        }
+        return path;
+    }
+    
+    public int compare(final Cookie c1, final Cookie c2) {
+        String path1 = normalizePath(c1);
+        String path2 = normalizePath(c2);
+        if (path1.equals(path2)) {
+            return 0;
+        } else if (path1.startsWith(path2)) {
+            return -1;
+        } else if (path2.startsWith(path1)) {
+            return 1;
+        } else {
+            // Does not really matter
+            return 0;
+        }
+    }
+
+}