org.jclouds.virtualbox.functions.admin.ImagesToYamlImagesFromYamlDescriptor Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of virtualbox Show documentation
jclouds components to access an implementation of virtualbox
The newest version!
/*
 * 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.virtualbox.functions.admin;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;

import java.util.List;
import java.util.Map;

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

import org.jclouds.compute.domain.Image;
import org.jclouds.virtualbox.domain.YamlImage;
import org.jclouds.virtualbox.functions.YamlImagesFromFileConfig;
import org.yaml.snakeyaml.Loader;
import org.yaml.snakeyaml.TypeDescription;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.constructor.Constructor;

import com.google.common.base.Supplier;
import com.google.common.collect.Maps;

@Singleton
public class ImagesToYamlImagesFromYamlDescriptor implements Supplier> {

   private String yamlDescriptor;

   @Inject
   public ImagesToYamlImagesFromYamlDescriptor(YamlImagesFromFileConfig yamlDescriptorSupplier) {
      this.yamlDescriptor = yamlDescriptorSupplier.get();
      checkNotNull(yamlDescriptor, "yaml descriptor");
      checkState(!yamlDescriptor.equals(""), "yaml descriptor is empty");
   }

   /**
    * Type-safe config class for YAML
    * 
    */
   public static class Config {
      public List images;
   }

   @Override
   public Map get() {

      Constructor constructor = new Constructor(Config.class);

      TypeDescription imageDesc = new TypeDescription(YamlImage.class);
      imageDesc.putListPropertyType("images", String.class);
      constructor.addTypeDescription(imageDesc);

      // Issue 855: testng is rev-locking us to snakeyaml 1.6
      // we have to use old constructor until this is fixed
      Yaml yaml = new Yaml(new Loader(constructor));
      Config config = (Config) yaml.load(yamlDescriptor);
      checkState(config != null, "missing config: class");
      checkState(config.images != null, "missing images: collection");

      Map backingMap = Maps.newLinkedHashMap();
      for (YamlImage yamlImage : config.images) {
         backingMap.put(YamlImage.toImage.apply(yamlImage), yamlImage);
      }
      return backingMap;
   }

}