org.apache.cassandra.cql3.functions.types

Class CodecUtils

java.lang.Object

org.apache.cassandra.cql3.functions.types.CodecUtils

public final class CodecUtils
extends java.lang.Object

A set of utility methods to deal with type conversion and serialization.

Method Summary

Modifier and Type	Method and Description
static java.nio.ByteBuffer	pack(java.nio.ByteBuffer[] buffers, int elements, ProtocolVersion version) Utility method that "packs" together a list of ByteBuffers containing serialized collection elements.
static java.nio.ByteBuffer	readBytes(java.nio.ByteBuffer bb, int length) Read length bytes from bb into a new ByteBuffer.
static java.nio.ByteBuffer	readValue(java.nio.ByteBuffer input, ProtocolVersion version) Utility method that reads a value.
static void	writeValue(java.nio.ByteBuffer output, java.nio.ByteBuffer value, ProtocolVersion version) Utility method that writes a value.

Methods inherited from class java.lang.Object

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

Method Detail

pack

public static java.nio.ByteBuffer pack(java.nio.ByteBuffer[] buffers,
                                       int elements,
                                       ProtocolVersion version)

Utility method that "packs" together a list of ByteBuffers containing serialized collection elements. Mainly intended for use with collection codecs when serializing collections.

Parameters:

buffers - the collection elements

elements - the total number of elements

version - the protocol version to use

Returns:

The serialized collection

readValue

public static java.nio.ByteBuffer readValue(java.nio.ByteBuffer input,
                                            ProtocolVersion version)

Utility method that reads a value. Mainly intended for collection codecs when deserializing CQL collections.

Parameters:

input - The ByteBuffer to read from.

version - The protocol version to use.

Returns:

The collection element.

writeValue

public static void writeValue(java.nio.ByteBuffer output,
                              java.nio.ByteBuffer value,
                              ProtocolVersion version)

Utility method that writes a value. Mainly intended for collection codecs when deserializing CQL collections.

Parameters:

output - The ByteBuffer to write to.

value - The value to write.

version - The protocol version to use.

readBytes

public static java.nio.ByteBuffer readBytes(java.nio.ByteBuffer bb,
                                            int length)

Read length bytes from bb into a new ByteBuffer.

Parameters:

bb - The ByteBuffer to read.

length - The number of bytes to read.

Returns:

The read bytes.