com.healthmarketscience.jackcess.util
Class ReadOnlyFileChannel

java.lang.Object
  extended by java.nio.channels.spi.AbstractInterruptibleChannel
      extended by java.nio.channels.FileChannel
          extended by com.healthmarketscience.jackcess.util.ReadOnlyFileChannel
All Implemented Interfaces:
Closeable, ByteChannel, Channel, GatheringByteChannel, InterruptibleChannel, ReadableByteChannel, ScatteringByteChannel, WritableByteChannel

public class ReadOnlyFileChannel
extends FileChannel

Wrapper for existing FileChannel which is read-only.

Implementation note: this class is optimized for use with Database. Therefore not all methods may be implemented.

Author:
James Ahlborn
Usage:
Advanced: This class is for advanced/internal use.

Nested Class Summary
 
Nested classes/interfaces inherited from class java.nio.channels.FileChannel
FileChannel.MapMode
 
Constructor Summary
ReadOnlyFileChannel(FileChannel delegate)
           
 
Method Summary
 void force(boolean metaData)
           
 FileLock lock(long position, long size, boolean shared)
           
 MappedByteBuffer map(FileChannel.MapMode mode, long position, long size)
           
 long position()
           
 FileChannel position(long newPosition)
           
 int read(ByteBuffer dst)
           
 long read(ByteBuffer[] dsts, int offset, int length)
           
 int read(ByteBuffer dst, long position)
           
 long size()
           
 long transferFrom(ReadableByteChannel src, long position, long count)
           
 long transferTo(long position, long count, WritableByteChannel target)
           
 FileChannel truncate(long size)
           
 FileLock tryLock(long position, long size, boolean shared)
           
 int write(ByteBuffer src)
           
 long write(ByteBuffer[] srcs, int offset, int length)
           
 int write(ByteBuffer src, long position)
           
 
Methods inherited from class java.nio.channels.FileChannel
lock, read, tryLock, write
 
Methods inherited from class java.nio.channels.spi.AbstractInterruptibleChannel
close, isOpen
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface java.nio.channels.Channel
close, isOpen
 

Constructor Detail

ReadOnlyFileChannel

public ReadOnlyFileChannel(FileChannel delegate)
Method Detail

read

public int read(ByteBuffer dst)
         throws IOException
Specified by:
read in interface ReadableByteChannel
Specified by:
read in class FileChannel
Throws:
IOException

read

public long read(ByteBuffer[] dsts,
                 int offset,
                 int length)
          throws IOException
Specified by:
read in interface ScatteringByteChannel
Specified by:
read in class FileChannel
Throws:
IOException

read

public int read(ByteBuffer dst,
                long position)
         throws IOException
Specified by:
read in class FileChannel
Throws:
IOException

position

public long position()
              throws IOException
Specified by:
position in class FileChannel
Throws:
IOException

position

public FileChannel position(long newPosition)
                     throws IOException
Specified by:
position in class FileChannel
Throws:
IOException

size

public long size()
          throws IOException
Specified by:
size in class FileChannel
Throws:
IOException

truncate

public FileChannel truncate(long size)
                     throws IOException
Specified by:
truncate in class FileChannel
Throws:
IOException

force

public void force(boolean metaData)
           throws IOException
Specified by:
force in class FileChannel
Throws:
IOException

transferTo

public long transferTo(long position,
                       long count,
                       WritableByteChannel target)
                throws IOException
Specified by:
transferTo in class FileChannel
Throws:
IOException

transferFrom

public long transferFrom(ReadableByteChannel src,
                         long position,
                         long count)
                  throws IOException
Specified by:
transferFrom in class FileChannel
Throws:
IOException

write

public int write(ByteBuffer src,
                 long position)
          throws IOException
Specified by:
write in class FileChannel
Throws:
IOException

write

public int write(ByteBuffer src)
          throws IOException
Specified by:
write in interface WritableByteChannel
Specified by:
write in class FileChannel
Throws:
IOException

write

public long write(ByteBuffer[] srcs,
                  int offset,
                  int length)
           throws IOException
Specified by:
write in interface GatheringByteChannel
Specified by:
write in class FileChannel
Throws:
IOException

map

public MappedByteBuffer map(FileChannel.MapMode mode,
                            long position,
                            long size)
                     throws IOException
Specified by:
map in class FileChannel
Throws:
IOException

lock

public FileLock lock(long position,
                     long size,
                     boolean shared)
              throws IOException
Specified by:
lock in class FileChannel
Throws:
IOException

tryLock

public FileLock tryLock(long position,
                        long size,
                        boolean shared)
                 throws IOException
Specified by:
tryLock in class FileChannel
Throws:
IOException


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