public TFileMeta(DataInput in) throws IOException {
  version = new Version(in);
  if (!version.compatibleWith(TFile.API_VERSION)) {
    throw new RuntimeException("Incompatible TFile fileVersion.");
  }
  recordCount = Utils.readVLong(in);
  strComparator = Utils.readString(in);
  comparator = makeComparator(strComparator);
}
 

/**
 * Constructor
 * 
 * @param fin
 *          FS input stream.
 * @param fileLength
 *          Length of the corresponding file
 * @throws IOException
 */
public Reader(FSDataInputStream fin, long fileLength, Configuration conf)
    throws IOException {
  this.in = fin;
  this.conf = conf;

  // move the cursor to the beginning of the tail, containing: offset to the
  // meta block index, version and magic
  fin.seek(fileLength - Magic.size() - Version.size() - Long.SIZE
      / Byte.SIZE);
  long offsetIndexMeta = fin.readLong();
  version = new Version(fin);
  Magic.readAndVerify(fin);

  if (!version.compatibleWith(BCFile.API_VERSION)) {
    throw new RuntimeException("Incompatible BCFile fileBCFileVersion.");
  }

  // read meta index
  fin.seek(offsetIndexMeta);
  metaIndex = new MetaIndex(fin);

  // read data:BCFile.index, the data block index
  BlockReader blockR = getMetaBlock(DataIndex.BLOCK_NAME);
  try {
    dataIndex = new DataIndex(blockR);
  } finally {
    blockR.close();
  }
}
 

public TFileMeta(DataInput in) throws IOException {
  version = new Version(in);
  if (!version.compatibleWith(TFile.API_VERSION)) {
    throw new RuntimeException("Incompatible TFile fileVersion.");
  }
  recordCount = Utils.readVLong(in);
  strComparator = Utils.readString(in);
  comparator = makeComparator(strComparator);
}
 

/**
 * Constructor
 * 
 * @param fin
 *          FS input stream.
 * @param fileLength
 *          Length of the corresponding file
 * @throws IOException
 */
public Reader(FSDataInputStream fin, long fileLength, Configuration conf)
    throws IOException {
  this.in = fin;
  this.conf = conf;

  // move the cursor to the beginning of the tail, containing: offset to the
  // meta block index, version and magic
  fin.seek(fileLength - Magic.size() - Version.size() - Long.SIZE
      / Byte.SIZE);
  long offsetIndexMeta = fin.readLong();
  version = new Version(fin);
  Magic.readAndVerify(fin);

  if (!version.compatibleWith(BCFile.API_VERSION)) {
    throw new RuntimeException("Incompatible BCFile fileBCFileVersion.");
  }

  // read meta index
  fin.seek(offsetIndexMeta);
  metaIndex = new MetaIndex(fin);

  // read data:BCFile.index, the data block index
  BlockReader blockR = getMetaBlock(DataIndex.BLOCK_NAME);
  try {
    dataIndex = new DataIndex(blockR);
  } finally {
    blockR.close();
  }
}
 

/**
 * Constructor
 *
 * @param fin
 *          FS input stream.
 * @param fileLength
 *          Length of the corresponding file
 * @throws IOException
 */
public Reader(FSDataInputStream fin, long fileLength, Configuration conf)
    throws IOException {
  this.in = fin;
  this.conf = conf;
  // A reader buffer to read the block
  baos = new ByteArrayOutputStream(DTFile.getFSInputBufferSize(conf) * 2);
  this.cacheKeys = new ArrayList<String>();
  // move the cursor to the beginning of the tail, containing: offset to the
  // meta block index, version and magic
  fin.seek(fileLength - Magic.size() - Version.size() - Long.SIZE
      / Byte.SIZE);
  long offsetIndexMeta = fin.readLong();
  version = new Version(fin);
  Magic.readAndVerify(fin);

  if (!version.compatibleWith(DTBCFile.API_VERSION)) {
    throw new RuntimeException("Incompatible BCFile fileBCFileVersion.");
  }

  // read meta index
  fin.seek(offsetIndexMeta);
  metaIndex = new MetaIndex(fin);

  // read data:BCFile.index, the data block index
  BlockReader blockR = getMetaBlock(DataIndex.BLOCK_NAME);
  try {
    dataIndex = new DataIndex(blockR);
  } finally {
    blockR.close();
  }
}
 

public TFileMeta(DataInput in) throws IOException {
  version = new Version(in);
  if (!version.compatibleWith(DTFile.API_VERSION)) {
    throw new RuntimeException("Incompatible TFile fileVersion.");
  }
  recordCount = Utils.readVLong(in);
  strComparator = Utils.readString(in);
  comparator = makeComparator(strComparator);
}
 

public TFileMeta(DataInput in) throws IOException {
  version = new Version(in);
  if (!version.compatibleWith(TFile.API_VERSION)) {
    throw new RuntimeException("Incompatible TFile fileVersion.");
  }
  recordCount = Utils.readVLong(in);
  strComparator = Utils.readString(in);
  comparator = makeComparator(strComparator);
}
 

/**
 * Constructor
 * 
 * @param fin
 *          FS input stream.
 * @param fileLength
 *          Length of the corresponding file
 * @throws IOException
 */
public Reader(FSDataInputStream fin, long fileLength, Configuration conf)
    throws IOException {
  this.in = fin;
  this.conf = conf;

  // move the cursor to the beginning of the tail, containing: offset to the
  // meta block index, version and magic
  fin.seek(fileLength - Magic.size() - Version.size() - Long.SIZE
      / Byte.SIZE);
  long offsetIndexMeta = fin.readLong();
  version = new Version(fin);
  Magic.readAndVerify(fin);

  if (!version.compatibleWith(BCFile.API_VERSION)) {
    throw new RuntimeException("Incompatible BCFile fileBCFileVersion.");
  }

  // read meta index
  fin.seek(offsetIndexMeta);
  metaIndex = new MetaIndex(fin);

  // read data:BCFile.index, the data block index
  BlockReader blockR = getMetaBlock(DataIndex.BLOCK_NAME);
  try {
    dataIndex = new DataIndex(blockR);
  } finally {
    blockR.close();
  }
}
 

public TFileMeta(DataInput in) throws IOException {
  version = new Version(in);
  if (!version.compatibleWith(TFile.API_VERSION)) {
    throw new RuntimeException("Incompatible TFile fileVersion.");
  }
  recordCount = Utils.readVLong(in);
  strComparator = Utils.readString(in);
  comparator = makeComparator(strComparator);
}
 

/**
 * Constructor
 * 
 * @param fin
 *          FS input stream.
 * @param fileLength
 *          Length of the corresponding file
 * @throws IOException
 */
public Reader(FSDataInputStream fin, long fileLength, Configuration conf)
    throws IOException {
  this.in = fin;
  this.conf = conf;

  // move the cursor to the beginning of the tail, containing: offset to the
  // meta block index, version and magic
  fin.seek(fileLength - Magic.size() - Version.size() - Long.SIZE
      / Byte.SIZE);
  long offsetIndexMeta = fin.readLong();
  version = new Version(fin);
  Magic.readAndVerify(fin);

  if (!version.compatibleWith(BCFile.API_VERSION)) {
    throw new RuntimeException("Incompatible BCFile fileBCFileVersion.");
  }

  // read meta index
  fin.seek(offsetIndexMeta);
  metaIndex = new MetaIndex(fin);

  // read data:BCFile.index, the data block index
  BlockReader blockR = getMetaBlock(DataIndex.BLOCK_NAME);
  try {
    dataIndex = new DataIndex(blockR);
  } finally {
    blockR.close();
  }
}
 

public Version getVersion() {
  return version;
}
 

public Version getVersion() {
  return version;
}
 

public Version getVersion() {
  return version;
}
 

public Version getVersion() {
  return version;
}
 

public Version getVersion() {
  return version;
}
 

/**
 * Get version of BCFile file being read.
 * 
 * @return version of BCFile file being read.
 */
public Version getBCFileVersion() {
  return version;
}
 

/**
 * Get version of BCFile API.
 * 
 * @return version of BCFile API.
 */
public Version getAPIVersion() {
  return API_VERSION;
}
 

/**
 * Get version of BCFile file being read.
 * 
 * @return version of BCFile file being read.
 */
public Version getBCFileVersion() {
  return version;
}
 

/**
 * Get version of BCFile API.
 * 
 * @return version of BCFile API.
 */
public Version getAPIVersion() {
  return API_VERSION;
}
 

/**
 * Get version of BCFile file being read.
 *
 * @return version of BCFile file being read.
 */
public Version getBCFileVersion() {
  return version;
}
 

/**
 * Get version of BCFile API.
 *
 * @return version of BCFile API.
 */
public Version getAPIVersion() {
  return API_VERSION;
}
 

/**
 * Get version of BCFile file being read.
 * 
 * @return version of BCFile file being read.
 */
public Version getBCFileVersion() {
  return version;
}
 

/**
 * Get version of BCFile API.
 * 
 * @return version of BCFile API.
 */
public Version getAPIVersion() {
  return API_VERSION;
}
 

/**
 * Get version of BCFile file being read.
 * 
 * @return version of BCFile file being read.
 */
public Version getBCFileVersion() {
  return version;
}
 

/**
 * Get version of BCFile API.
 * 
 * @return version of BCFile API.
 */
public Version getAPIVersion() {
  return API_VERSION;
}