/**
    * Licensed to jclouds, Inc. (jclouds) under one or more
    * contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  jclouds 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.
   */
  
  package org.jclouds.blobstore.functions;
  
  import static com.google.common.base.Preconditions.checkNotNull;
  
  import java.util.Date;
  
  import javax.inject.Inject;
  import javax.inject.Singleton;
  
  import org.jclouds.blobstore.options.GetOptions;
  import org.jclouds.date.DateService;
  import org.jclouds.util.Strings2;
  
  import com.google.common.base.Function;
  
  /**
   * 
   * @author Adrian Cole
   */
  @Singleton
  public class HttpGetOptionsListToGetOptions implements
        Function<org.jclouds.http.options.GetOptions[], org.jclouds.blobstore.options.GetOptions> {
     private final DateService dateService;
  
     @Inject
     HttpGetOptionsListToGetOptions(DateService dateService) {
        this.dateService = checkNotNull(dateService, "dateService");
     }
  
     public GetOptions apply(org.jclouds.http.options.GetOptions[] from) {
        checkNotNull(from, "options");
  
        org.jclouds.blobstore.options.GetOptions to = new org.jclouds.blobstore.options.GetOptions();
        if (from.length != 0) {
           if (from[0].getIfMatch() != null) {
              to.ifETagMatches(Strings2.replaceAll(from[0].getIfMatch(), '"', ""));
           }
           if (from[0].getIfModifiedSince() != null) {
              Date time = dateService.rfc822DateParse(from[0].getIfModifiedSince());
              to.ifModifiedSince(time);
           }
           if (from[0].getIfNoneMatch() != null) {
              to.ifETagDoesntMatch(Strings2.replaceAll(from[0].getIfNoneMatch(), '"', ""));
           }
           if (from[0].getIfUnmodifiedSince() != null) {
              Date time = dateService.rfc822DateParse(from[0].getIfUnmodifiedSince());
              to.ifUnmodifiedSince(time);
           }
           for (String range : from[0].getRanges()) {
              String[] firstLast = range.split("\\-");
              to.range(Long.parseLong(firstLast[0]), Long.parseLong(firstLast[1]));
           }
        }
        return to;
     }
  
  }