org.grouplens.lenskit.data.dao.packed

Class BinaryUtils

java.lang.Object

org.grouplens.lenskit.data.dao.packed.BinaryUtils

public final class BinaryUtils
extends Object

Method Summary

Modifier and Type	Method and Description
static void	readBuffer(FileChannel chan, ByteBuffer buf, long pos) Read a buffer completely from a position in a file.
static void	readBuffer(ReadableByteChannel chan, ByteBuffer buf) Read a buffer completely from a channel.
static void	writeBuffer(FileChannel chan, ByteBuffer buf, long pos) Write a buffer completely to a position in a file.
static void	writeBuffer(WritableByteChannel chan, ByteBuffer buf) Write a buffer completely to the channel.

Methods inherited from class java.lang.Object

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

Method Detail

readBuffer

public static void readBuffer(ReadableByteChannel chan,
                              ByteBuffer buf)
                       throws IOException

Read a buffer completely from a channel.

Parameters:

chan - The channel.

buf - The buffer.

Throws:

IOException - If an error occurs while read the buffer.

readBuffer

public static void readBuffer(FileChannel chan,
                              ByteBuffer buf,
                              long pos)
                       throws IOException

Read a buffer completely from a position in a file.

Parameters:

chan - The channel.

buf - The buffer.

pos - The position from which to read.

Throws:

IOException - If an error occurs while read the buffer.

writeBuffer

public static void writeBuffer(WritableByteChannel chan,
                               ByteBuffer buf)
                        throws IOException

Write a buffer completely to the channel.

Parameters:

buf - The buffer.

Throws:

IOException - If an error occurs while writing the buffer.

writeBuffer

public static void writeBuffer(FileChannel chan,
                               ByteBuffer buf,
                               long pos)
                        throws IOException

Write a buffer completely to a position in a file.

Parameters:

chan - The channel.

buf - The buffer.

pos - The position from which to read.

Throws:

IOException - If an error occurs while read the buffer.