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org.apache.hadoop.fs
Interface PositionedReadable

All Known Implementing Classes:
BufferedFSInputStream, FSDataInputStream, FSInputChecker, FSInputStream, FTPInputStream

public interface PositionedReadable

Stream that permits positional reading.


Method Summary
 int read(long position, byte[] buffer, int offset, int length)
          Read upto the specified number of bytes, from a given position within a file, and return the number of bytes read.
 void readFully(long position, byte[] buffer)
          Read number of bytes equalt to the length of the buffer, from a given position within a file.
 void readFully(long position, byte[] buffer, int offset, int length)
          Read the specified number of bytes, from a given position within a file.
 

Method Detail

read

int read(long position,
         byte[] buffer,
         int offset,
         int length)
         throws IOException
Read upto the specified number of bytes, from a given position within a file, and return the number of bytes read. This does not change the current offset of a file, and is thread-safe.

Throws:
IOException

readFully

void readFully(long position,
               byte[] buffer,
               int offset,
               int length)
               throws IOException
Read the specified number of bytes, from a given position within a file. This does not change the current offset of a file, and is thread-safe.

Throws:
IOException

readFully

void readFully(long position,
               byte[] buffer)
               throws IOException
Read number of bytes equalt to the length of the buffer, from a given position within a file. This does not change the current offset of a file, and is thread-safe.

Throws:
IOException


Copyright © 2009 The Apache Software Foundation