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com.imagero.uio
Class OffsetRandomAccessFile  

java.lang.Object
  java.io.RandomAccessFile
      com.imagero.uio.OffsetRandomAccessFile

All Implemented Interfaces:

java.io.DataInput, java.io.DataOutput

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public class OffsetRandomAccessFile

extends java.io.RandomAccessFile

OffsetRandomAccessFile.java
Usefull for reading EXIF files
However this class has bad performance, bacause the data is unbuffered.

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Field Summary
protected  long	length
protected  long	offset

 

Fields inherited from class java.io.RandomAccessFile

 

Constructor Summary

OffsetRandomAccessFile(java.io.File file, java.lang.String mode, long offset)

OffsetRandomAccessFile(java.io.File file, java.lang.String mode, long offset, long length)

OffsetRandomAccessFile(java.lang.String name, java.lang.String mode, long offset)

OffsetRandomAccessFile(java.lang.String name, java.lang.String mode, long offset, long length)

 

Method Summary
long	getFilePointer()           This method returns the current offset in the file at which the next read or write will occur
long	length()           This method returns the length of the file in bytes
int	read()           This method reads a single byte of data from the file and returns it as an integer.
void	seek(long pos)           This method sets the current file position to the specified offset from the beginning of the file.
int	skip(int n)

 

Methods inherited from class java.io.RandomAccessFile

close, getChannel, getFD, read, read, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, setLength, skipBytes, write, write, write, 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

 

Field Detail

offset

protected long offset

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length

protected long length

Constructor Detail

OffsetRandomAccessFile

public OffsetRandomAccessFile(java.io.File file,
                              java.lang.String mode,
                              long offset)
                       throws java.io.IOException

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OffsetRandomAccessFile

public OffsetRandomAccessFile(java.io.File file,
                              java.lang.String mode,
                              long offset,
                              long length)
                       throws java.io.IOException

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OffsetRandomAccessFile

public OffsetRandomAccessFile(java.lang.String name,
                              java.lang.String mode,
                              long offset)
                       throws java.io.IOException

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OffsetRandomAccessFile

public OffsetRandomAccessFile(java.lang.String name,
                              java.lang.String mode,
                              long offset,
                              long length)
                       throws java.io.IOException

Method Detail

seek

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

Description copied from class: java.io.RandomAccessFile

This method sets the current file position to the specified offset from the beginning of the file. Note that some operating systems will allow the file pointer to be set past the current end of the file.

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read

public int read()
         throws java.io.IOException

Description copied from class: java.io.RandomAccessFile

This method reads a single byte of data from the file and returns it as an integer.

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length

public long length()
            throws java.io.IOException

Description copied from class: java.io.RandomAccessFile

This method returns the length of the file in bytes

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getFilePointer

public long getFilePointer()
                    throws java.io.IOException

Description copied from class: java.io.RandomAccessFile

This method returns the current offset in the file at which the next read or write will occur

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skip

public int skip(int n)
         throws java.io.IOException

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