/*
 * Copyright (C) 2015 hops.io.
 *
 * Licensed 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.apache.hadoop.hdfs.server.blockmanagement;

import io.hops.metadata.common.FinderType;
import io.hops.metadata.hdfs.entity.Replica;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.ReplicaState;

import java.util.Comparator;

/**
 * ReplicaUnderConstruction contains information about replicas while they are
 * under construction. The GS, the length and the state of the replica is as
 * reported by the data-node. It is not guaranteed, but expected, that
 * data-nodes actually have corresponding replicas.
 */
public class ReplicaUnderConstruction extends Replica {

  public static enum Finder implements FinderType<ReplicaUnderConstruction> {

    ByBlockIdAndINodeId,
    ByINodeId,
    ByINodeIds;

    @Override
    public Class getType() {
      return ReplicaUnderConstruction.class;
    }

    @Override
    public Annotation getAnnotated() {
      switch (this) {
        case ByBlockIdAndINodeId:
          return Annotation.PrunedIndexScan;
        case ByINodeId:
          return Annotation.PrunedIndexScan;
        case ByINodeIds:
          return Annotation.BatchedPrunedIndexScan;
        default:
          throw new IllegalStateException();
      }
    }

  }

  public static enum Order implements Comparator<ReplicaUnderConstruction> {

    ByStorageId() {
      @Override
      public int compare(ReplicaUnderConstruction o1,
          ReplicaUnderConstruction o2) {
        return Integer.valueOf(o1.getStorageId()).compareTo(
            Integer.valueOf(o2.getStorageId
                ()));
      }
    }
  }

  HdfsServerConstants.ReplicaState state;

  public ReplicaUnderConstruction(ReplicaState state, int storageId,
      long blockId, int inodeId) {
    super(storageId, blockId, inodeId);
    this.state = state;
  }

  public ReplicaState getState() {
    return state;
  }

  public void setState(ReplicaState state) {
    this.state = state;
  }
}