Java Doc for RandomAccessFileTransactionBuffer.java in  » Database-DBMS » JODB » com » mobixess » jodb » core » io » buffers » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » JODB » com.mobixess.jodb.core.io.buffers 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   com.mobixess.jodb.core.io.buffers.RandomAccessFileTransactionBuffer

RandomAccessFileTransactionBuffer
public class RandomAccessFileTransactionBuffer implements IRandomAccessDataBuffer(Code)



Constructor Summary
 RandomAccessFileTransactionBuffer(File file, boolean write)
    

Method Summary
public  voidclose()
    
public  voiddelete()
    
public  ByteChannelgetChannel()
    
public  longgetCursorOffset()
    
public  longlength()
    
public  voidprefetch(long offset)
    
public  voidread(byte[] b, int off, int len)
    
public  booleanreadBoolean()
    
public  bytereadByte()
    
public  charreadChar()
    
public  doublereadDouble()
    
public  floatreadFloat()
    
public  voidreadFully(byte[] b)
    
public  voidreadFully(byte[] b, int off, int len)
    
public  intreadInt()
    
public  StringreadLine()
    
public  longreadLong()
    
public  shortreadShort()
    
public  StringreadUTF()
    
public  intreadUnsignedByte()
    
public  intreadUnsignedShort()
    
public  voidresetToEnd()
    
public  voidresetToStart()
    
public  voidseek(long pos)
    
public  voidsetLength(long newLength)
    
public  longskip(long n)
    
public  intskipBytes(int n)
    
public  StringtoString()
    
public  longtransferFrom(ReadableByteChannel src, long position, long count)
     Transfers bytes into this channel's file from the given readable byte channel.

An attempt is made to read up to count bytes from the source channel and write them to this channel's file starting at the given position.

public  longtransferTo(long position, long count, WritableByteChannel target)
     Transfers bytes from this channel's file to the given writable byte channel.

An attempt is made to read up to count bytes starting at the given position in this channel's file and write them to the target channel.

public  voidwrite(int b)
    
public  voidwrite(byte[] b)
    
public  voidwrite(byte[] b, int off, int len)
    
public  voidwriteBoolean(boolean v)
    
public  voidwriteByte(int v)
    
public  voidwriteBytes(String s)
    
public  voidwriteChar(int v)
    
public  voidwriteChars(String s)
    
public  voidwriteDouble(double v)
    
public  voidwriteFloat(float v)
    
public  voidwriteInt(int v)
    
public  voidwriteLong(long v)
    
public  voidwriteShort(int v)
    
public  voidwriteUTF(String str)
    


Constructor Detail
RandomAccessFileTransactionBuffer
RandomAccessFileTransactionBuffer(File file, boolean write) throws IOException(Code)




Method Detail
close
public void close() throws IOException(Code)

Parameters:
  file -
Parameters:
  raFile -



delete
public void delete() throws IOException(Code)



getChannel
public ByteChannel getChannel()(Code)



getCursorOffset
public long getCursorOffset() throws IOException(Code)



length
public long length() throws IOException(Code)



prefetch
public void prefetch(long offset) throws IOException(Code)



read
public void read(byte[] b, int off, int len) throws IOException(Code)



readBoolean
public boolean readBoolean() throws IOException(Code)



readByte
public byte readByte() throws IOException(Code)



readChar
public char readChar() throws IOException(Code)



readDouble
public double readDouble() throws IOException(Code)



readFloat
public float readFloat() throws IOException(Code)



readFully
public void readFully(byte[] b) throws IOException(Code)



readFully
public void readFully(byte[] b, int off, int len) throws IOException(Code)



readInt
public int readInt() throws IOException(Code)



readLine
public String readLine() throws IOException(Code)



readLong
public long readLong() throws IOException(Code)



readShort
public short readShort() throws IOException(Code)



readUTF
public String readUTF() throws IOException(Code)



readUnsignedByte
public int readUnsignedByte() throws IOException(Code)



readUnsignedShort
public int readUnsignedShort() throws IOException(Code)



resetToEnd
public void resetToEnd() throws IOException(Code)



resetToStart
public void resetToStart() throws IOException(Code)



seek
public void seek(long pos) throws IOException(Code)



setLength
public void setLength(long newLength) throws IOException(Code)



skip
public long skip(long n) throws IOException(Code)



skipBytes
public int skipBytes(int n) throws IOException(Code)



toString
public String toString()(Code)



transferFrom
public long transferFrom(ReadableByteChannel src, long position, long count) throws IOException(Code)
Transfers bytes into this channel's file from the given readable byte channel.

An attempt is made to read up to count bytes from the source channel and write them to this channel's file starting at the given position. An invocation of this method may or may not transfer all of the requested bytes; whether or not it does so depends upon the natures and states of the channels. Fewer than the requested number of bytes will be transferred if the source channel has fewer than count bytes remaining, or if the source channel is non-blocking and has fewer than count bytes immediately available in its input buffer.

This method does not modify this channel's position. If the given position is greater than the file's current size then no bytes are transferred. If the source channel has a position then bytes are read starting at that position and then the position is incremented by the number of bytes read.

This method is potentially much more efficient than a simple loop that reads from the source channel and writes to this channel. Many operating systems can transfer bytes directly from the source channel into the filesystem cache without actually copying them.


Parameters:
  src - The source channel
Parameters:
  position - The position within the file at which the transfer is to begin;must be non-negative
Parameters:
  count - The maximum number of bytes to be transferred; must benon-negative The number of bytes, possibly zero,that were actually transferred
throws:
  IllegalArgumentException - If the preconditions on the parameters do not hold
throws:
  NonReadableChannelException - If the source channel was not opened for reading
throws:
  NonWritableChannelException - If this channel was not opened for writing
throws:
  ClosedChannelException - If either this channel or the source channel is closed
throws:
  AsynchronousCloseException - If another thread closes either channelwhile the transfer is in progress
throws:
  ClosedByInterruptException - If another thread interrupts the current thread while thetransfer is in progress, thereby closing both channels andsetting the current thread's interrupt status
throws:
  IOException - If some other I/O error occurs



transferTo
public long transferTo(long position, long count, WritableByteChannel target) throws IOException(Code)
Transfers bytes from this channel's file to the given writable byte channel.

An attempt is made to read up to count bytes starting at the given position in this channel's file and write them to the target channel. An invocation of this method may or may not transfer all of the requested bytes; whether or not it does so depends upon the natures and states of the channels. Fewer than the requested number of bytes are transferred if this channel's file contains fewer than count bytes starting at the given position, or if the target channel is non-blocking and it has fewer than count bytes free in its output buffer.

This method does not modify this channel's position. If the given position is greater than the file's current size then no bytes are transferred. If the target channel has a position then bytes are written starting at that position and then the position is incremented by the number of bytes written.

This method is potentially much more efficient than a simple loop that reads from this channel and writes to the target channel. Many operating systems can transfer bytes directly from the filesystem cache to the target channel without actually copying them.


Parameters:
  position - The position within the file at which the transfer is to begin;must be non-negative
Parameters:
  count - The maximum number of bytes to be transferred; must benon-negative
Parameters:
  target - The target channel The number of bytes, possibly zero,that were actually transferred
throws:
  IllegalArgumentException - If the preconditions on the parameters do not hold
throws:
  NonReadableChannelException - If this channel was not opened for reading
throws:
  NonWritableChannelException - If the target channel was not opened for writing
throws:
  ClosedChannelException - If either this channel or the target channel is closed
throws:
  AsynchronousCloseException - If another thread closes either channelwhile the transfer is in progress
throws:
  ClosedByInterruptException - If another thread interrupts the current thread while thetransfer is in progress, thereby closing both channels andsetting the current thread's interrupt status
throws:
  IOException - If some other I/O error occurs



write
public void write(int b) throws IOException(Code)



write
public void write(byte[] b) throws IOException(Code)



write
public void write(byte[] b, int off, int len) throws IOException(Code)



writeBoolean
public void writeBoolean(boolean v) throws IOException(Code)



writeByte
public void writeByte(int v) throws IOException(Code)



writeBytes
public void writeBytes(String s) throws IOException(Code)



writeChar
public void writeChar(int v) throws IOException(Code)



writeChars
public void writeChars(String s) throws IOException(Code)



writeDouble
public void writeDouble(double v) throws IOException(Code)



writeFloat
public void writeFloat(float v) throws IOException(Code)



writeInt
public void writeInt(int v) throws IOException(Code)



writeLong
public void writeLong(long v) throws IOException(Code)



writeShort
public void writeShort(int v) throws IOException(Code)



writeUTF
public void writeUTF(String str) throws IOException(Code)



Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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