com.davisor.data.stream
Class ReversedDataBuffer

java.lang.Object
  com.davisor.data.stream.IndirectDataBuffer
      com.davisor.data.stream.ReversedDataBuffer

All Implemented Interfaces:

Data, DataBuffer, DataSource

public class ReversedDataBuffer

extends IndirectDataBuffer

ReversedDataBuffer implements a reversed view to the underlying data buffer. The underlying data buffer is reversed in row order, that is the first row of the underlying data buffer is the last row of this buffer and vice versa.

Since:

JDK1.2

See Also:

Type

Field Summary

Fields inherited from class com.davisor.data.stream.IndirectDataBuffer

M_dataBuffer

Constructor Summary

ReversedDataBuffer(DataBuffer dataBuffer)
Constructs a new ReversedDataBuffer from the given DataBuffer.

Method Summary

DataValue	getData(int index) Gets the specific data element from the data buffer.
DataStream	getStream(boolean reversed) Gets a new data stream from the data source.

Methods inherited from class com.davisor.data.stream.IndirectDataBuffer

close, equals, getSize, getStream, getType, hashCode, toString, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ReversedDataBuffer

public ReversedDataBuffer(DataBuffer dataBuffer)

Constructs a new ReversedDataBuffer from the given DataBuffer.

Method Detail

getData

public DataValue getData(int index)
                  throws com.davisor.core.InvalidIndexException

Gets the specific data element from the data buffer.

Specified by:

getData in interface DataBuffer

Specified by:

getData in class IndirectDataBuffer

Parameters:

index - data element index

Throws:

com.davisor.core.InvalidIndexException - if no data is bound to given index

getStream

public DataStream getStream(boolean reversed)
                     throws InvalidDataException

Gets a new data stream from the data source.

Specified by:

getStream in interface DataBuffer

Specified by:

getStream in class IndirectDataBuffer

Parameters:

reversed - controls if stream reads buffer forwards or backwards

Throws:

InvalidDataException