Class FileReader

Method Details

• read

  public static Record read(DataInput in, Record record)

  Reads one record from the given input into record and returns it, without closing the input.

• addExceptionProperties

  public DataException addExceptionProperties(DataException exception)

  Description copied from class: Endpoint

  Adds this endpoint's current state to a DataException. Since this method is called whenever an exception is thrown, subclasses should override it to add their specific information.

  Overrides:

  addExceptionProperties in class DataReader

• isAutoCloseReader

  public boolean isAutoCloseReader()

  Indicates if the underlying input stream should be closed when this stream closes (defaults to true).

• setAutoCloseReader

  public FileReader setAutoCloseReader(boolean autoCloseReader)

  Indicates if the underlying input stream should be closed when this stream closes (defaults to true).

• isAutoCloseWriter

  @Deprecated public boolean isAutoCloseWriter()

  Deprecated.

  use isAutoCloseReader() instead. Indicates if the underlying input stream should be closed when this stream closes (defaults to true).

• setAutoCloseWriter

  @Deprecated public FileReader setAutoCloseWriter(boolean autoCloseWriter)

  Deprecated.

  use setAutoCloseReader(boolean) instead. Indicates if the underlying input stream should be closed when this stream closes (defaults to true).

• isCompressed

  public boolean isCompressed()

  Indicates if the data is compressed and should be decompressed as it is being read.

• close

  public void close()

  Description copied from class: DataEndpoint

  Indicates that this endpoint has finished reading or writing.

  Overrides:

  close in class DataEndpoint

• readImpl

  protected Record readImpl() throws Throwable

  Description copied from class: DataReader

  Overridden by subclasses to read the next record from this DataReader. The default implementation of DataReader.read() now insures that this method will not be called again after it returns a null.

  If no record is available, null will be returned.

  Contract for subclasses (see also docs/authoring/DataReader.md):

  • Return null exactly once to signal end-of-stream.
  • Do not call this method directly — DataReader.read() is the template method that wraps exceptions, increments the record count, and tracks lineage.
  • Do not call DataEndpoint.incrementRecordCount() here; DataReader.read() already does.
  • Throw raw exceptions; DataReader.read() wraps them via exception(throwable).

  Specified by:

  readImpl in class DataReader

  Throws:

  Throwable