net.sf.farrago.runtime
Interface FennelTupleReader

All Known Implementing Classes:

FennelOnlyTupleReader

public interface FennelTupleReader

FennelTupleReader defines an interface for unmarshalling tuples returned by Fennel. Implementations are generated by FennelToIteratorConverter for unmarshalling specific tuple formats.

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/runtime/FennelTupleReader.java#12 $

Author:

John V. Sichi

Method Summary

Object

unmarshalTuple(ByteBuffer byteBuffer, byte[] byteArray, ByteBuffer sliceBuffer) Unmarshals one tuple.

Method Detail

unmarshalTuple

Object unmarshalTuple(ByteBuffer byteBuffer,
                      byte[] byteArray,
                      ByteBuffer sliceBuffer)

Unmarshals one tuple.

Parameters:

byteBuffer - read-only buffer containing marshalled tuple data; on entry, the buffer position is at beginning of tuple

byteArray - byte array underlying byteBuffer

sliceBuffer - result of byteBuffer.slice(), for use in relative offsets; on return, sliceBuffer position should be at the unaligned end of tuple

Returns:

subclass-specific object containing unmarshalled tuple data