org.apache.cassandra.io.util
Class BufferedRandomAccessFile

java.lang.Object
  java.io.RandomAccessFile
      org.apache.cassandra.io.util.BufferedRandomAccessFile

All Implemented Interfaces:

java.io.Closeable, java.io.DataInput, java.io.DataOutput, FileDataInput

public class BufferedRandomAccessFile
extends java.io.RandomAccessFile
implements FileDataInput

A BufferedRandomAccessFile is like a RandomAccessFile, but it uses a private buffer so that most operations do not require a disk access.

Note: The operations on this class are unmonitored. Also, the correct functioning of the RandomAccessFile methods that are not overridden here relies on the implementation of those methods in the superclass.

Field Summary

static int

BuffSz_

Constructor Summary

BufferedRandomAccessFile(java.io.File file, java.lang.String mode)
Open a new BufferedRandomAccessFile on file in mode mode, which should be "r" for reading only, or "rw" for reading and writing.

BufferedRandomAccessFile(java.io.File file, java.lang.String mode, int size)

BufferedRandomAccessFile(java.lang.String name, java.lang.String mode)
Open a new BufferedRandomAccessFile on the file named name in mode mode, which should be "r" for reading only, or "rw" for reading and writing.

BufferedRandomAccessFile(java.lang.String name, java.lang.String mode, int size)

Method Summary

int	bytesPastMark()
void	close()
long	getAbsolutePosition()
long	getFilePointer()
java.lang.String	getPath()
boolean	isEOF()
long	length()
void	mark()
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
void	reset()
void	seek(long pos)
void	sync()
void	write(byte[] b)
void	write(byte[] b, int off, int len)
void	write(int b)

Methods inherited from class java.io.RandomAccessFile

getChannel, getFD, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, setLength, skipBytes, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.io.DataInput

readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, skipBytes

Field Detail

BuffSz_

public static final int BuffSz_

See Also:

Constant Field Values

Constructor Detail

BufferedRandomAccessFile

public BufferedRandomAccessFile(java.io.File file,
                                java.lang.String mode)
                         throws java.io.IOException

Open a new BufferedRandomAccessFile on file in mode mode, which should be "r" for reading only, or "rw" for reading and writing.

Throws:

java.io.IOException

BufferedRandomAccessFile

public BufferedRandomAccessFile(java.io.File file,
                                java.lang.String mode,
                                int size)
                         throws java.io.IOException

Throws:

java.io.IOException

BufferedRandomAccessFile

public BufferedRandomAccessFile(java.lang.String name,
                                java.lang.String mode)
                         throws java.io.IOException

Open a new BufferedRandomAccessFile on the file named name in mode mode, which should be "r" for reading only, or "rw" for reading and writing.

Throws:

java.io.IOException

BufferedRandomAccessFile

public BufferedRandomAccessFile(java.lang.String name,
                                java.lang.String mode,
                                int size)
                         throws java.io.IOException

Throws:

java.io.IOException

Method Detail

getPath

public java.lang.String getPath()

Specified by:

getPath in interface FileDataInput

sync

public void sync()
          throws java.io.IOException

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Overrides:

close in class java.io.RandomAccessFile

Throws:

java.io.IOException

seek

public void seek(long pos)
          throws java.io.IOException

Overrides:

seek in class java.io.RandomAccessFile

Throws:

java.io.IOException

getAbsolutePosition

public long getAbsolutePosition()

Specified by:

getAbsolutePosition in interface FileDataInput

getFilePointer

public long getFilePointer()

Overrides:

getFilePointer in class java.io.RandomAccessFile

length

public long length()
            throws java.io.IOException

Overrides:

length in class java.io.RandomAccessFile

Throws:

java.io.IOException

read

public int read()
         throws java.io.IOException

Overrides:

read in class java.io.RandomAccessFile

Throws:

java.io.IOException

read

public int read(byte[] b)
         throws java.io.IOException

Overrides:

read in class java.io.RandomAccessFile

Throws:

java.io.IOException

read

public int read(byte[] b,
                int off,
                int len)
         throws java.io.IOException

Overrides:

read in class java.io.RandomAccessFile

Throws:

java.io.IOException

write

public void write(int b)
           throws java.io.IOException

Specified by:

write in interface java.io.DataOutput

Overrides:

write in class java.io.RandomAccessFile

Throws:

java.io.IOException

write

public void write(byte[] b)
           throws java.io.IOException

Specified by:

write in interface java.io.DataOutput

Overrides:

write in class java.io.RandomAccessFile

Throws:

java.io.IOException

write

public void write(byte[] b,
                  int off,
                  int len)
           throws java.io.IOException

Specified by:

write in interface java.io.DataOutput

Overrides:

write in class java.io.RandomAccessFile

Throws:

java.io.IOException

isEOF

public boolean isEOF()
              throws java.io.IOException

Specified by:

isEOF in interface FileDataInput

Throws:

java.io.IOException

mark

public void mark()

Specified by:

mark in interface FileDataInput

reset

public void reset()
           throws java.io.IOException

Specified by:

reset in interface FileDataInput

Throws:

java.io.IOException

bytesPastMark

public int bytesPastMark()

Specified by:

bytesPastMark in interface FileDataInput