/*
    * ====================================================================
    * 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.impl.cookie;
  
  import org.apache.http.annotation.Immutable;
  
  import org.apache.http.cookie.ClientCookie;
  import org.apache.http.cookie.Cookie;
  import org.apache.http.cookie.CookieAttributeHandler;
  import org.apache.http.cookie.CookieOrigin;
  import org.apache.http.cookie.CookieRestrictionViolationException;
  import org.apache.http.cookie.MalformedCookieException;
  import org.apache.http.cookie.SetCookie;
  import org.apache.http.cookie.SetCookie2;
  
  /**
   * <tt>"Version"</tt> cookie attribute handler for RFC 2965 cookie spec.
   *
   * @since 4.0
   */
  @Immutable
  public class RFC2965VersionAttributeHandler implements CookieAttributeHandler {
  
      public RFC2965VersionAttributeHandler() {
          super();
      }
  
      /**
       * Parse cookie version attribute.
       */
      public void parse(final SetCookie cookie, final String value)
              throws MalformedCookieException {
          if (cookie == null) {
              throw new IllegalArgumentException("Cookie may not be null");
          }
          if (value == null) {
              throw new MalformedCookieException(
                      "Missing value for version attribute");
          }
          int version = -1;
          try {
              version = Integer.parseInt(value);
          } catch (NumberFormatException e) {
              version = -1;
          }
          if (version < 0) {
              throw new MalformedCookieException("Invalid cookie version.");
          }
          cookie.setVersion(version);
      }
  
      /**
       * validate cookie version attribute. Version attribute is REQUIRED.
       */
      public void validate(final Cookie cookie, final CookieOrigin origin)
              throws MalformedCookieException {
          if (cookie == null) {
              throw new IllegalArgumentException("Cookie may not be null");
          }
          if (cookie instanceof SetCookie2) {
              if (cookie instanceof ClientCookie
                      && !((ClientCookie) cookie).containsAttribute(ClientCookie.VERSION_ATTR)) {
                  throw new CookieRestrictionViolationException(
                          "Violates RFC 2965. Version attribute is required.");
              }
          }
      }
  
      public boolean match(final Cookie cookie, final CookieOrigin origin) {
          return true;
      }
  
  }