org.multijava.util.classfile
Class UniverseByteConstants

java.lang.Object
  org.multijava.util.classfile.UniverseByteConstants

public class UniverseByteConstants

extends Object

This class contains static helper functions that work on the byte constants used to represent universe annotations in attributes.

Author:

AHS

Constructor Summary

UniverseByteConstants()

 

Method Summary
static byte	buildConstant(CUniverse univ)           Build byte constant from a given universe.
static byte	buildConstant(CUniverse univ, CUniverse base_univ)           Build byte constant from a pair of universes (array type).
static boolean	isArray(byte byteConstant)           Returns if a given byte constant represents an array type.
static CUniverse	toBaseUniverse(byte byteConstant)           Returns an instance of the universe represented by a a given byte constant.
static CUniverse	toUniverse(byte byteConstant)           Returns an instance of the universe represented by a given byte constant.

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

UniverseByteConstants

public UniverseByteConstants()

isArray

public static boolean isArray(byte byteConstant)

Returns if a given byte constant represents an array type.

Parameters:

byteConstant - a byte constant representing a universe annotation

buildConstant

public static byte buildConstant(CUniverse univ)

Build byte constant from a given universe.

Parameters:

univ - the universe

buildConstant

public static byte buildConstant(CUniverse univ,
                                 CUniverse base_univ)

Build byte constant from a pair of universes (array type). The hi bit is set to 1 to signify an array annotation.

Parameters:

univ - the universe of the array itself

base_univ - the universe of the array elements

toUniverse

public static CUniverse toUniverse(byte byteConstant)

Returns an instance of the universe represented by a given byte constant. For array annotations, this returns the universe of the array object itself, not of the array elements. The universe is stored in the low 2 bits of the byte constant.

Parameters:

byteConstant - a byte constant representing a universe annotation

toBaseUniverse

public static CUniverse toBaseUniverse(byte byteConstant)

Returns an instance of the universe represented by a a given byte constant. This is for array annotations only, and returns the universe of the array elements. The universe of the array elements is stored in bits [3,2] of the byte constant.

Parameters:

byteConstant - a byte constant representing a universe annotation