org.gcube.indexmanagement.featureindexlibrary.vafile.io
Class IOHelper

java.lang.Object
  org.gcube.indexmanagement.featureindexlibrary.vafile.io.IOHelper

public class IOHelper
extends Object

IO Helper class

Author:

UoA

Constructor Summary

IOHelper()
Creates a new instance

Method Summary

ApproximationFileEntry	readApproximation(DataInputStream in) Reads an approximation
ApproximationFileEntry	readApproximation(RandomAccessFile rand) Reads an approximation
VAFileParams	readHeader(RandomAccessFile rand) Reads a header
VectorFileEntry	readRecord(DataInputStream in) Reads a record
VectorFileEntry	readRecord(RandomAccessFile rand) Reads a record
void	setIDLength(int idlength) Sets the property value
void	setVectorLength(int vectorlength) Sets the property value
void	skipHeader(RandomAccessFile rand) Skips the header
void	writeApproximation(ApproximationFileEntry entry, RandomAccessFile rand) Writes an Approximation
void	writeHeader(VAFileParams params, RandomAccessFile rand) Writes the header
void	writeRecord(VectorFileEntry entry, RandomAccessFile rand) Writes a record

Methods inherited from class java.lang.Object

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

Constructor Detail

IOHelper

public IOHelper()

Creates a new instance

Method Detail

setIDLength

public void setIDLength(int idlength)
                 throws Exception

Sets the property value

Parameters:

idlength - The property value

Throws:

Exception - An error

setVectorLength

public void setVectorLength(int vectorlength)
                     throws Exception

Sets the property value

Parameters:

vectorlength - The property value

Throws:

Exception - An error

writeHeader

public void writeHeader(VAFileParams params,
                        RandomAccessFile rand)
                 throws Exception

Writes the header

Parameters:

params - The VAFile header params

rand - The pointer

Throws:

Exception - An error

skipHeader

public void skipHeader(RandomAccessFile rand)
                throws Exception

Skips the header

Parameters:

rand - The pointer

Throws:

Exception - An error

readHeader

public VAFileParams readHeader(RandomAccessFile rand)
                        throws Exception

Reads a header

Parameters:

rand - The pointer

Returns:

The header

Throws:

Exception - An error

writeApproximation

public void writeApproximation(ApproximationFileEntry entry,
                               RandomAccessFile rand)
                        throws Exception

Writes an Approximation

Parameters:

entry - The entry

rand - The pointer

Throws:

Exception - An error

readApproximation

public ApproximationFileEntry readApproximation(RandomAccessFile rand)

Reads an approximation

Parameters:

rand - The pointer

Returns:

The entry

readApproximation

public ApproximationFileEntry readApproximation(DataInputStream in)

Reads an approximation

Parameters:

in - The pointer

Returns:

The entry

writeRecord

public void writeRecord(VectorFileEntry entry,
                        RandomAccessFile rand)
                 throws Exception

Writes a record

Parameters:

entry - The entry

rand - The pointer

Throws:

Exception - An error

readRecord

public VectorFileEntry readRecord(RandomAccessFile rand)

Reads a record

Parameters:

rand - The pointer

Returns:

Th erecord

readRecord

public VectorFileEntry readRecord(DataInputStream in)

Reads a record

Parameters:

in - The pointer

Returns:

The record