/*
 * 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 io.hops.metadata.adaptor;

import io.hops.exception.StorageException;
import io.hops.metadata.DalAdaptor;
import io.hops.metadata.hdfs.dal.PendingBlockDataAccess;
import io.hops.metadata.hdfs.entity.PendingBlockInfo;

import java.util.Collection;
import java.util.List;

public class PendingBlockInfoDALAdaptor extends
    DalAdaptor<org.apache.hadoop.hdfs.server.blockmanagement.PendingBlockInfo, PendingBlockInfo>
    implements
    PendingBlockDataAccess<org.apache.hadoop.hdfs.server.blockmanagement.PendingBlockInfo> {

  private final PendingBlockDataAccess<PendingBlockInfo> dataAccces;

  public PendingBlockInfoDALAdaptor(
      PendingBlockDataAccess<PendingBlockInfo> dataAccess) {
    this.dataAccces = dataAccess;
  }

  @Override
  public List<org.apache.hadoop.hdfs.server.blockmanagement.PendingBlockInfo> findByTimeLimitLessThan(
      long timeLimit) throws StorageException {
    return (List<org.apache.hadoop.hdfs.server.blockmanagement.PendingBlockInfo>) convertDALtoHDFS(
        dataAccces.findByTimeLimitLessThan(timeLimit));
  }

  @Override
  public List<org.apache.hadoop.hdfs.server.blockmanagement.PendingBlockInfo> findAll()
      throws StorageException {
    return (List<org.apache.hadoop.hdfs.server.blockmanagement.PendingBlockInfo>) convertDALtoHDFS(
        dataAccces.findAll());
  }

  @Override
  public org.apache.hadoop.hdfs.server.blockmanagement.PendingBlockInfo findByPKey(
      long blockId, int inodeId) throws StorageException {
    return convertDALtoHDFS(dataAccces.findByPKey(blockId, inodeId));
  }

  @Override
  public int countValidPendingBlocks(long timeLimit) throws StorageException {
    return dataAccces.countValidPendingBlocks(timeLimit);
  }

  @Override
  public void prepare(
      Collection<org.apache.hadoop.hdfs.server.blockmanagement.PendingBlockInfo> removed,
      Collection<org.apache.hadoop.hdfs.server.blockmanagement.PendingBlockInfo> newed,
      Collection<org.apache.hadoop.hdfs.server.blockmanagement.PendingBlockInfo> modified)
      throws StorageException {
    dataAccces.prepare(convertHDFStoDAL(removed), convertHDFStoDAL(newed),
        convertHDFStoDAL(modified));
  }

  @Override
  public void removeAll() throws StorageException {
    dataAccces.removeAll();
  }

  @Override
  public PendingBlockInfo convertHDFStoDAL(
      org.apache.hadoop.hdfs.server.blockmanagement.PendingBlockInfo hdfsClass)
      throws StorageException {
    if (hdfsClass != null) {
      return new PendingBlockInfo(hdfsClass.getBlockId(),
          hdfsClass.getInodeId(), hdfsClass.getTimeStamp(),
          hdfsClass.getNumReplicas());
    } else {
      return null;
    }
  }

  @Override
  public org.apache.hadoop.hdfs.server.blockmanagement.PendingBlockInfo convertDALtoHDFS(
      PendingBlockInfo dalClass) throws StorageException {
    if (dalClass != null) {
      return new org.apache.hadoop.hdfs.server.blockmanagement.PendingBlockInfo(
          dalClass.getBlockId(), dalClass.getInodeId(), dalClass.getTimeStamp(),
          dalClass.getNumReplicas());
    } else {
      return null;
    }
  }

  @Override
  public List<org.apache.hadoop.hdfs.server.blockmanagement.PendingBlockInfo> findByINodeId(
      int inodeId) throws StorageException {
    return (List<org.apache.hadoop.hdfs.server.blockmanagement.PendingBlockInfo>) convertDALtoHDFS(
        dataAccces.findByINodeId(inodeId));
  }

  @Override
  public List<org.apache.hadoop.hdfs.server.blockmanagement.PendingBlockInfo> findByINodeIds(
      int[] inodeIds) throws StorageException {
    return (List<org.apache.hadoop.hdfs.server.blockmanagement.PendingBlockInfo>) convertDALtoHDFS(
        dataAccces.findByINodeIds(inodeIds));
  }
}