core/src/main/java/org/jclouds/chef/functions/ParseCookbookDefinitionFromJsonv10.java

/*
 * 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.chef.functions;

import com.google.common.base.Function;
import org.jclouds.chef.domain.CookbookDefinition;
import org.jclouds.http.HttpResponse;
import org.jclouds.http.functions.ParseJson;

import javax.inject.Inject;
import javax.inject.Singleton;
import java.util.Map;

/**
 * Parses the cookbook versions in a Chef Server >= 0.10.8.
 */
@Singleton
public class ParseCookbookDefinitionFromJsonv10 implements Function<HttpResponse, CookbookDefinition> {

   /** Parser for responses from chef server >= 0.10.8 */
   private final ParseJson<Map<String, CookbookDefinition>> parser;

   @Inject
   ParseCookbookDefinitionFromJsonv10(ParseJson<Map<String, CookbookDefinition>> parser) {
      this.parser = parser;
   }

   @Override
   public CookbookDefinition apply(HttpResponse response) {
      Map<String, CookbookDefinition> result = parser.apply(response);
      String cookbookName = result.keySet().iterator().next();
      CookbookDefinition def = result.values().iterator().next();
      return CookbookDefinition.builder() //
             .from(def) //
             .name(cookbookName) //
             .build();
   }
}