/*
    * ====================================================================
    * 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.conn.util.PublicSuffixMatcher;
  import org.apache.http.cookie.Cookie;
  import org.apache.http.cookie.CookieOrigin;
  import org.apache.http.cookie.CookieSpec;
  import org.apache.http.cookie.CookieSpecProvider;
  import org.apache.http.cookie.MalformedCookieException;
  import org.apache.http.protocol.HttpContext;
  
  /**
   * {@link org.apache.http.cookie.CookieSpecProvider} implementation that provides an instance of
   * {@link org.apache.http.impl.cookie.DefaultCookieSpec}. The instance returned by this factory can
   * be shared by multiple threads.
   *
   * @since 4.4
   */
  @Contract(threading = ThreadingBehavior.IMMUTABLE)
  public class DefaultCookieSpecProvider implements CookieSpecProvider {
  
      public enum CompatibilityLevel {
          DEFAULT,
          IE_MEDIUM_SECURITY
      }
  
      private final CompatibilityLevel compatibilityLevel;
      private final PublicSuffixMatcher publicSuffixMatcher;
      private final String[] datepatterns;
      private final boolean oneHeader;
  
      private volatile CookieSpec cookieSpec;
  
      public DefaultCookieSpecProvider(
              final CompatibilityLevel compatibilityLevel,
              final PublicSuffixMatcher publicSuffixMatcher,
              final String[] datepatterns,
              final boolean oneHeader) {
          super();
          this.compatibilityLevel = compatibilityLevel != null ? compatibilityLevel : CompatibilityLevel.DEFAULT;
          this.publicSuffixMatcher = publicSuffixMatcher;
          this.datepatterns = datepatterns;
          this.oneHeader = oneHeader;
      }
  
      public DefaultCookieSpecProvider(
              final CompatibilityLevel compatibilityLevel,
              final PublicSuffixMatcher publicSuffixMatcher) {
          this(compatibilityLevel, publicSuffixMatcher, null, false);
      }
  
      public DefaultCookieSpecProvider(final PublicSuffixMatcher publicSuffixMatcher) {
          this(CompatibilityLevel.DEFAULT, publicSuffixMatcher, null, false);
      }
  
      public DefaultCookieSpecProvider() {
          this(CompatibilityLevel.DEFAULT, null, null, false);
      }
  
      @Override
      public CookieSpec create(final HttpContext context) {
          if (cookieSpec == null) {
              synchronized (this) {
                  if (cookieSpec == null) {
                      final RFC2965SpecC2965Spec.html#RFC2965Spec">RFC2965Spec strict = new RFC2965Spec(this.oneHeader,
                              new RFC2965VersionAttributeHandler(),
                              new BasicPathHandler(),
                              PublicSuffixDomainFilter.decorate(
                                      new RFC2965DomainAttributeHandler(), this.publicSuffixMatcher),
                              new RFC2965PortAttributeHandler(),
                              new BasicMaxAgeHandler(),
                             new BasicSecureHandler(),
                             new BasicCommentHandler(),
                             new RFC2965CommentUrlAttributeHandler(),
                             new RFC2965DiscardAttributeHandler());
                     final RFC2109Specc.html#RFC2109Spec">RFC2109Spec obsoleteStrict = new RFC2109Spec(this.oneHeader,
                             new RFC2109VersionHandler(),
                             new BasicPathHandler(),
                             PublicSuffixDomainFilter.decorate(
                                     new RFC2109DomainHandler(), this.publicSuffixMatcher),
                             new BasicMaxAgeHandler(),
                             new BasicSecureHandler(),
                             new BasicCommentHandler());
                     final NetscapeDraftSpecec.html#NetscapeDraftSpec">NetscapeDraftSpec netscapeDraft = new NetscapeDraftSpec(
                             PublicSuffixDomainFilter.decorate(
                                     new BasicDomainHandler(), this.publicSuffixMatcher),
                             this.compatibilityLevel == CompatibilityLevel.IE_MEDIUM_SECURITY ?
                                     new BasicPathHandler() {
                                         @Override
                                         public void validate(
                                                 final Cookie cookie,
                                                 final CookieOrigin origin) throws MalformedCookieException {
                                             // No validation
                                         }
                                     } : new BasicPathHandler(),
                             new BasicSecureHandler(),
                             new BasicCommentHandler(),
                             new BasicExpiresHandler(this.datepatterns != null ? this.datepatterns.clone() :
                                     new String[]{NetscapeDraftSpec.EXPIRES_PATTERN}));
                     this.cookieSpec = new DefaultCookieSpec(strict, obsoleteStrict, netscapeDraft);
                 }
             }
         }
         return this.cookieSpec;
     }
 
 }