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/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Metamarkets 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 io.druid.storage.hdfs;

import com.fasterxml.jackson.annotation.JacksonInject;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonTypeName;
import com.google.common.base.Preconditions;
import io.druid.segment.loading.LoadSpec;
import io.druid.segment.loading.SegmentLoadingException;
import org.apache.hadoop.fs.Path;

import java.io.File;

/**
 *
 */
@JsonTypeName(HdfsStorageDruidModule.SCHEME)
public class HdfsLoadSpec implements LoadSpec
{
  private final Path path;
  final HdfsDataSegmentPuller puller;

  @JsonCreator
  public HdfsLoadSpec(
      @JacksonInject HdfsDataSegmentPuller puller,
      @JsonProperty(value = "path", required = true) String path
  )
  {
    Preconditions.checkNotNull(path);
    this.path = new Path(path);
    this.puller = puller;
  }

  @JsonProperty("path")
  public final String getPathString()
  {
    return path.toString();
  }

  @Override
  public LoadSpecResult loadSegment(File outDir) throws SegmentLoadingException
  {
    return new LoadSpecResult(puller.getSegmentFiles(path, outDir).size());
  }
}