/*
 * 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.
 */
package org.jclouds.elasticstack.functions;

import java.util.Set;

import javax.inject.Inject;
import javax.inject.Singleton;

import org.jclouds.elasticstack.domain.DriveInfo;
import org.jclouds.http.HttpResponse;

import com.google.common.base.Function;
import com.google.common.collect.Iterables;

@Singleton
public class KeyValuesDelimitedByBlankLinesToDriveInfo implements Function<HttpResponse, DriveInfo> {
   private final ListOfKeyValuesDelimitedByBlankLinesToDriveInfoSet setParser;

   @Inject
   public KeyValuesDelimitedByBlankLinesToDriveInfo(ListOfKeyValuesDelimitedByBlankLinesToDriveInfoSet setParser) {
      this.setParser = setParser;
   }

   @Override
   public DriveInfo apply(HttpResponse response) {
      Set<DriveInfo> drives = setParser.apply(response);
      if (drives.isEmpty())
         return null;
      return Iterables.get(drives, 0);
   }
}
