aliyun-ecs/src/main/java/org/jclouds/aliyun/ecs/domain/regionscoped/RegionAndId.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.aliyun.ecs.domain.regionscoped;

import com.google.auto.value.AutoValue;
import com.google.common.base.Splitter;
import com.google.common.collect.Iterables;

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

@AutoValue
public abstract class RegionAndId {

   RegionAndId() {}

   public static RegionAndId create(String regionId, String id) {
      return new AutoValue_RegionAndId(regionId, id);
   }

   public static RegionAndId fromSlashEncoded(String id) {
      Iterable<String> parts = Splitter.on('/').split(checkNotNull(id, "id"));
      checkArgument(Iterables.size(parts) == 2, "id must be in format regionId/id");
      return RegionAndId.create(Iterables.get(parts, 0), Iterables.get(parts, 1));
   }

   public static String slashEncodeRegionAndId(String regionId, String id) {
      return slashEncodeRegionAndId(RegionAndId.create(regionId, id));
   }

   public static String slashEncodeRegionAndId(RegionAndId regionAndId) {
      checkNotNull(regionAndId, "regionAndId");
      return String.format("%s/%s", regionAndId.regionId(), regionAndId.id());
   }

   public abstract String regionId();

   public abstract String id();

}