org.tmatesoft.sqljet.core.internal.memory
Class SqlJetByteBuffer

java.lang.Object
  org.tmatesoft.sqljet.core.internal.memory.SqlJetByteBuffer

All Implemented Interfaces:

ISqlJetMemoryBuffer

Direct Known Subclasses:

SqlJetDirectByteBuffer

public class SqlJetByteBuffer
extends java.lang.Object
implements ISqlJetMemoryBuffer

Field Summary

protected java.nio.ByteBuffer

buffer

Constructor Summary

SqlJetByteBuffer()

SqlJetByteBuffer(java.nio.ByteBuffer b)

Method Summary

void	allocate(int size) Allocate chunk of memory.
byte[]	asArray()
int	compareTo(int pointer, ISqlJetMemoryBuffer buffer, int bufferPointer)
void	copyFrom(int dstPos, ISqlJetMemoryBuffer src, int srcPos, int count)
void	fill(int from, int count, byte value)
void	free() Fries chunk of memory.
byte	getByte(int pointer) Read byte at pointer.
void	getBytes(int pointer, byte[] bytes, int to, int count)
int	getByteUnsigned(int pointer) Read unsigned byte at pointer.
int	getInt(int pointer) Read int at pointer.
long	getIntUnsigned(int pointer) Read unsigned int at pointer.
long	getLong(int pointer) Read long at pointer.
ISqlJetMemoryPointer	getPointer(int pointer) Returns pointer in memory chunk at passed offset.
short	getShort(int pointer) Read short at pointer.
int	getShortUnsigned(int pointer) Read unsigned short at pointer.
int	getSize() Size of allocated memory chunk.
boolean	isAllocated() Returns true if memory is allocated.
void	putByte(int pointer, byte value) Write byte at pointer.
void	putBytes(int pointer, byte[] bytes, int from, int count)
void	putByteUnsigned(int pointer, int value) Write unsigned byte at pointer.
void	putInt(int pointer, int value) Write int at pointer.
void	putIntUnsigned(int pointer, long value) Write unsigned int at pointer.
void	putLong(int pointer, long value) Write long at pointer.
void	putShort(int pointer, short value) Write short at pointer.
void	putShortUnsigned(int pointer, int value) Write unsigned short at pointer.
int	readFromFile(int pointer, java.io.RandomAccessFile file, long position, int count) Read from file into memory chunk at pointer.
int	writeToFile(int pointer, java.io.RandomAccessFile file, long position, int count) Write from memory chunk at pointer to file.

Methods inherited from class java.lang.Object

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

Field Detail

buffer

protected java.nio.ByteBuffer buffer

Constructor Detail

SqlJetByteBuffer

public SqlJetByteBuffer()

SqlJetByteBuffer

public SqlJetByteBuffer(java.nio.ByteBuffer b)

Parameters:

b -

Method Detail

allocate

public void allocate(int size)

Description copied from interface: ISqlJetMemoryBuffer

Allocate chunk of memory. If memory already has allocated then fries current chunk and allocates new.

Specified by:

allocate in interface ISqlJetMemoryBuffer

Parameters:

size - size of chunk in bytes

free

public void free()

Description copied from interface: ISqlJetMemoryBuffer

Fries chunk of memory.

Specified by:

free in interface ISqlJetMemoryBuffer

isAllocated

public boolean isAllocated()

Description copied from interface: ISqlJetMemoryBuffer

Returns true if memory is allocated.

Specified by:

isAllocated in interface ISqlJetMemoryBuffer

Returns:

getSize

public int getSize()

Description copied from interface: ISqlJetMemoryBuffer

Size of allocated memory chunk.

Specified by:

getSize in interface ISqlJetMemoryBuffer

Returns:

getPointer

public ISqlJetMemoryPointer getPointer(int pointer)

Description copied from interface: ISqlJetMemoryBuffer

Returns pointer in memory chunk at passed offset.

Specified by:

getPointer in interface ISqlJetMemoryBuffer

Returns:

getByte

public byte getByte(int pointer)

Description copied from interface: ISqlJetMemoryBuffer

Read byte at pointer.

Specified by:

getByte in interface ISqlJetMemoryBuffer

Returns:

getByteUnsigned

public int getByteUnsigned(int pointer)

Description copied from interface: ISqlJetMemoryBuffer

Read unsigned byte at pointer.

Specified by:

getByteUnsigned in interface ISqlJetMemoryBuffer

Returns:

getInt

public int getInt(int pointer)

Description copied from interface: ISqlJetMemoryBuffer

Read int at pointer.

Specified by:

getInt in interface ISqlJetMemoryBuffer

Returns:

getIntUnsigned

public long getIntUnsigned(int pointer)

Description copied from interface: ISqlJetMemoryBuffer

Read unsigned int at pointer.

Specified by:

getIntUnsigned in interface ISqlJetMemoryBuffer

Returns:

getLong

public long getLong(int pointer)

Description copied from interface: ISqlJetMemoryBuffer

Read long at pointer.

Specified by:

getLong in interface ISqlJetMemoryBuffer

Returns:

getShort

public short getShort(int pointer)

Description copied from interface: ISqlJetMemoryBuffer

Read short at pointer.

Specified by:

getShort in interface ISqlJetMemoryBuffer

Returns:

getShortUnsigned

public int getShortUnsigned(int pointer)

Description copied from interface: ISqlJetMemoryBuffer

Read unsigned short at pointer.

Specified by:

getShortUnsigned in interface ISqlJetMemoryBuffer

Returns:

putByte

public void putByte(int pointer,
                    byte value)

Description copied from interface: ISqlJetMemoryBuffer

Write byte at pointer.

Specified by:

putByte in interface ISqlJetMemoryBuffer

putByteUnsigned

public void putByteUnsigned(int pointer,
                            int value)

Description copied from interface: ISqlJetMemoryBuffer

Write unsigned byte at pointer.

Specified by:

putByteUnsigned in interface ISqlJetMemoryBuffer

putInt

public void putInt(int pointer,
                   int value)

Description copied from interface: ISqlJetMemoryBuffer

Write int at pointer.

Specified by:

putInt in interface ISqlJetMemoryBuffer

putIntUnsigned

public void putIntUnsigned(int pointer,
                           long value)

Description copied from interface: ISqlJetMemoryBuffer

Write unsigned int at pointer.

Specified by:

putIntUnsigned in interface ISqlJetMemoryBuffer

putLong

public void putLong(int pointer,
                    long value)

Description copied from interface: ISqlJetMemoryBuffer

Write long at pointer.

Specified by:

putLong in interface ISqlJetMemoryBuffer

putShort

public void putShort(int pointer,
                     short value)

Description copied from interface: ISqlJetMemoryBuffer

Write short at pointer.

Specified by:

putShort in interface ISqlJetMemoryBuffer

putShortUnsigned

public void putShortUnsigned(int pointer,
                             int value)

Description copied from interface: ISqlJetMemoryBuffer

Write unsigned short at pointer.

Specified by:

putShortUnsigned in interface ISqlJetMemoryBuffer

readFromFile

public int readFromFile(int pointer,
                        java.io.RandomAccessFile file,
                        long position,
                        int count)
                 throws java.io.IOException

Description copied from interface: ISqlJetMemoryBuffer

Read from file into memory chunk at pointer. Method isn't synchronized on file.

Specified by:

readFromFile in interface ISqlJetMemoryBuffer

Returns:

Throws:

java.io.IOException

writeToFile

public int writeToFile(int pointer,
                       java.io.RandomAccessFile file,
                       long position,
                       int count)
                throws java.io.IOException

Description copied from interface: ISqlJetMemoryBuffer

Write from memory chunk at pointer to file. Method isn't synchronized on file.

Specified by:

writeToFile in interface ISqlJetMemoryBuffer

Returns:

Throws:

java.io.IOException

asArray

public byte[] asArray()

Specified by:

asArray in interface ISqlJetMemoryBuffer

Returns:

copyFrom

public void copyFrom(int dstPos,
                     ISqlJetMemoryBuffer src,
                     int srcPos,
                     int count)

Specified by:

copyFrom in interface ISqlJetMemoryBuffer

fill

public void fill(int from,
                 int count,
                 byte value)

Specified by:

fill in interface ISqlJetMemoryBuffer

getBytes

public void getBytes(int pointer,
                     byte[] bytes,
                     int to,
                     int count)

Specified by:

getBytes in interface ISqlJetMemoryBuffer

putBytes

public void putBytes(int pointer,
                     byte[] bytes,
                     int from,
                     int count)

Specified by:

putBytes in interface ISqlJetMemoryBuffer

compareTo

public int compareTo(int pointer,
                     ISqlJetMemoryBuffer buffer,
                     int bufferPointer)

Specified by:

compareTo in interface ISqlJetMemoryBuffer

Returns: