brown.tracingplane.baggageprotocol

Class AtomPrefixes

java.lang.Object

brown.tracingplane.baggageprotocol.AtomPrefixes

public class AtomPrefixes
extends java.lang.Object

This class has the logic for creating and checking bag prefixes. It does not directly create or deal with bit representations; that is contained in AtomPrefixTypes.

The baggage protocol only uses the first byte of an atom as a prefix. Consequently, during parsing, instead of interpreting the first byte, we just look it up in an array of 256 prefix objects.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AtomPrefixes.AtomPrefix The first byte of an atom is its prefix, which contains some metadata about the atom; the first bit of an atom denotes whether it is a data atom or header atom.
static class	AtomPrefixes.DataPrefix
static class	AtomPrefixes.HeaderPrefix The first byte of a header atom also specifies whether it is indexed or keyed, and the header's level
static class	AtomPrefixes.IndexedHeaderPrefix The payload of an indexed header is expected to be an unsigned variable-length lexicographically consistent integer: UnsignedLexVarint
static class	AtomPrefixes.KeyedHeaderPrefix The payload of a keyed header is expected to be arbitrary length bytes.
static class	AtomPrefixes.UnsupportedPrefix

Method Summary

Modifier and Type	Method and Description
static AtomPrefixes.AtomPrefix	get(byte prefix) Get the AtomPrefixes.AtomPrefix object for the specified prefix
static void	main(java.lang.String[] args)

Methods inherited from class java.lang.Object

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

Method Detail

get

public static AtomPrefixes.AtomPrefix get(byte prefix)

Get the AtomPrefixes.AtomPrefix object for the specified prefix

Parameters:

prefix - the first byte of an atom

Returns:

the AtomPrefixes.AtomPrefix object that corresponds to this prefix

main

public static void main(java.lang.String[] args)