Package org.apache.cassandra.cql3.functions.types

Class CodecUtils

java.lang.Object

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

public final class CodecUtils
extends Object

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

Method Summary

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

pack

public static ByteBuffer pack(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 ByteBuffer readValue(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(ByteBuffer output,
 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 ByteBuffer readBytes(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.