org.classdump.luna.lib

Class NameMetamethodValueTypeNamer

java.lang.Object

org.classdump.luna.lib.NameMetamethodValueTypeNamer

All Implemented Interfaces:

org.classdump.luna.ValueTypeNamer

public class NameMetamethodValueTypeNamer
extends Object
implements org.classdump.luna.ValueTypeNamer

A value type namer that looks up type names in object metatables, and distinguishes light userdata from full userdata.

The namer first tries to find the key "__name" (see BasicLib.MT_NAME) in the object's metatable. If a value with such key exists and is a string, it is used as the type name. Otherwise, light userdata is assigned the type name "light userdata" (BasicLib.TYPENAME_LIGHT_USERDATA), and the rest is assigned the same name as assigned by PlainValueTypeNamer.

Constructor Summary

Constructors

Constructor and Description
NameMetamethodValueTypeNamer(org.classdump.luna.MetatableProvider metatableProvider) Creates a new instance of this value type namer that uses the supplied metatable provider metatableProvider for looking up type names.

Method Summary

Modifier and Type	Method and Description
org.classdump.luna.ByteString	typeNameOf(Object instance)
static org.classdump.luna.ByteString	typeNameOf(Object instance, org.classdump.luna.MetatableProvider metatableProvider) Returns the type name (a string) of the given value instance, using metatableProvider to look up the the name in the "__name" field of instance's metatable, if it is defined.

Methods inherited from class java.lang.Object

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

Constructor Detail

NameMetamethodValueTypeNamer

public NameMetamethodValueTypeNamer(org.classdump.luna.MetatableProvider metatableProvider)

Creates a new instance of this value type namer that uses the supplied metatable provider metatableProvider for looking up type names.

Parameters:

metatableProvider - the metatable provider, must not be null

Throws:

NullPointerException - if metatableProvider is null

Method Detail

typeNameOf

public static org.classdump.luna.ByteString typeNameOf(Object instance,
                                                       org.classdump.luna.MetatableProvider metatableProvider)

Returns the type name (a string) of the given value instance, using metatableProvider to look up the the name in the "__name" field of instance's metatable, if it is defined.

Parameters:

instance - the object instance, may be null

metatableProvider - the metatable provider, must not be null

Returns:

type name of instance

Throws:

NullPointerException - if metatableProvider is null

typeNameOf

public org.classdump.luna.ByteString typeNameOf(Object instance)

Specified by:

typeNameOf in interface org.classdump.luna.ValueTypeNamer