hugedataaccess

Class MMapDataAccess

java.lang.Object

hugedataaccess.BaseDataAccess

hugedataaccess.ByteBufferDataAccess

hugedataaccess.MMapDataAccess

All Implemented Interfaces:

DataAccess

public class MMapDataAccess
extends ByteBufferDataAccess

Field Summary

Fields inherited from class hugedataaccess.ByteBufferDataAccess

buffers

Fields inherited from class hugedataaccess.BaseDataAccess

currentPosition, DEFAULT_SEGMENT_SIZE, segmentSize, segmentSizeDivisor, segmentSizePower

Constructor Summary

Constructors

Constructor and Description
MMapDataAccess(String fileName)
MMapDataAccess(String fileName, int bufferSize)
MMapDataAccess(String fileName, long bytesCapacity)
MMapDataAccess(String fileName, long bytesCapacity, int bufferSize)

Method Summary

Modifier and Type	Method and Description
void	close()
void	ensureCapacity(long bytes)
long	getCapacity()
boolean	isEmpty()

Methods inherited from class hugedataaccess.ByteBufferDataAccess

getByte, getChar, getDouble, getFloat, getInt, getLong, getShort, setByte, setChar, setDouble, setFloat, setInt, setLong, setShort

Methods inherited from class hugedataaccess.BaseDataAccess

getByte, getChar, getCurrentPosition, getDouble, getFloat, getInt, getLong, getShort, setByte, setChar, setCurrentPosition, setDouble, setFloat, setInt, setLong, setSegmentSize, setShort

Methods inherited from class java.lang.Object

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

Constructor Detail

MMapDataAccess

public MMapDataAccess(String fileName)

MMapDataAccess

public MMapDataAccess(String fileName,
                      int bufferSize)

MMapDataAccess

public MMapDataAccess(String fileName,
                      long bytesCapacity)
               throws IOException

Throws:

IOException

MMapDataAccess

public MMapDataAccess(String fileName,
                      long bytesCapacity,
                      int bufferSize)
               throws IOException

Throws:

IOException

Method Detail

ensureCapacity

public void ensureCapacity(long bytes)

Specified by:

ensureCapacity in interface DataAccess

Overrides:

ensureCapacity in class ByteBufferDataAccess

getCapacity

public long getCapacity()

Specified by:

getCapacity in interface DataAccess

Overrides:

getCapacity in class ByteBufferDataAccess

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface DataAccess

Overrides:

isEmpty in class BaseDataAccess

close

public void close()

Specified by:

close in interface DataAccess

Overrides:

close in class ByteBufferDataAccess