/*
    * ====================================================================
    * 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.Contract;
  import org.apache.http.annotation.ThreadingBehavior;
  import org.apache.http.cookie.ClientCookie;
  import org.apache.http.cookie.CommonCookieAttributeHandler;
  import org.apache.http.cookie.Cookie;
  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.util.Args;
  
  /**
   *
   * @since 4.0
   */
  @Contract(threading = ThreadingBehavior.IMMUTABLE)
  public class RFC2109VersionHandler extends AbstractCookieAttributeHandler implements CommonCookieAttributeHandler {
  
      public RFC2109VersionHandler() {
          super();
      }
  
      @Override
      public void parse(final SetCookie cookie, final String value)
              throws MalformedCookieException {
          Args.notNull(cookie, "Cookie");
          if (value == null) {
              throw new MalformedCookieException("Missing value for version attribute");
          }
          if (value.trim().isEmpty()) {
              throw new MalformedCookieException("Blank value for version attribute");
          }
          try {
             cookie.setVersion(Integer.parseInt(value));
          } catch (final NumberFormatException e) {
              throw new MalformedCookieException("Invalid version: "
                  + e.getMessage());
          }
      }
  
      @Override
      public void validate(final Cookie cookie, final CookieOrigin origin)
              throws MalformedCookieException {
          Args.notNull(cookie, "Cookie");
          if (cookie.getVersion() < 0) {
              throw new CookieRestrictionViolationException("Cookie version may not be negative");
          }
      }
  
      @Override
      public String getAttributeName() {
          return ClientCookie.VERSION_ATTR;
      }
  
  }