org.apache.avro.file
Class DataFileReader<D>

java.lang.Object
  org.apache.avro.file.DataFileReader<D>

public class DataFileReader<D>
extends Object

Read files written by DataFileWriter.

See Also:

DataFileWriter

Constructor Summary

DataFileReader(SeekableInput sin, DatumReader<D> reader)
Construct a reader for a file.

Method Summary

void	close() Close this reader.
byte[]	getMeta(String key) Return the value of a metadata property.
long	getMetaLong(String key) Return the value of a metadata property.
String	getMetaString(String key) Return the value of a metadata property.
D	next(D reuse) Return the next datum in the file.
void	seek(long position) Move to the specified synchronization point, as returned by DataFileWriter.sync().
void	sync(long position) Move to the next synchronization point after a position.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DataFileReader

public DataFileReader(SeekableInput sin,
                      DatumReader<D> reader)
               throws IOException

Construct a reader for a file.

Throws:

IOException

Method Detail

getMeta

public byte[] getMeta(String key)

Return the value of a metadata property.

getMetaString

public String getMetaString(String key)

Return the value of a metadata property.

getMetaLong

public long getMetaLong(String key)

Return the value of a metadata property.

next

public D next(D reuse)
       throws IOException

Return the next datum in the file.

Throws:

IOException

seek

public void seek(long position)
          throws IOException

Move to the specified synchronization point, as returned by DataFileWriter.sync().

Throws:

IOException

sync

public void sync(long position)
          throws IOException

Move to the next synchronization point after a position.

Throws:

IOException

close

public void close()
           throws IOException

Close this reader.

Throws:

IOException