org.luaj.vm2
Class LuaUserdata

java.lang.Object
  org.luaj.vm2.Varargs
      org.luaj.vm2.LuaValue
          org.luaj.vm2.LuaUserdata

public class LuaUserdata
extends LuaValue

Field Summary

java.lang.Object	m_instance
LuaValue	m_metatable

Fields inherited from class org.luaj.vm2.LuaValue

ADD, CALL, CONCAT, DIV, EMPTYSTRING, ENV, EQ, FALSE, INDEX, LE, LEN, LT, METATABLE, MINUSONE, MOD, MODE, MUL, NEWINDEX, NIL, NILS, NONE, NOVALS, ONE, POW, SUB, TBOOLEAN, TFUNCTION, TINT, TLIGHTUSERDATA, TNIL, TNONE, TNUMBER, TOSTRING, TRUE, TSTRING, TTABLE, TTHREAD, TUSERDATA, TVALUE, TYPE_NAMES, UNM, ZERO

Constructor Summary

LuaUserdata(java.lang.Object obj)

LuaUserdata(java.lang.Object obj, LuaValue metatable)

Method Summary

java.lang.Object	checkuserdata() Check that this is a LuaUserdata, or throw LuaError if it is not
java.lang.Object	checkuserdata(java.lang.Class c) Check that this is a LuaUserdata, or throw LuaError if it is not
boolean	eq_b(LuaValue val) Equals: Perform equality comparison with another value including metatag processing using LuaValue.EQ, and return java boolean
LuaValue	eq(LuaValue val) Equals: Perform equality comparison with another value including metatag processing using LuaValue.EQ.
boolean	eqmt(LuaValue val)
boolean	equals(java.lang.Object val)
LuaValue	get(LuaValue key) Get a value in a table including metatag processing using LuaValue.INDEX.
LuaValue	getmetatable() Get the metatable for this LuaValue
int	hashCode()
boolean	isuserdata() Check if this is a userdata
boolean	isuserdata(java.lang.Class c) Check if this is a userdata of type c
java.lang.Object	optuserdata(java.lang.Class c, java.lang.Object defval) Check that optional argument is a userdata whose instance is of a type and return the Object instance
java.lang.Object	optuserdata(java.lang.Object defval) Check that optional argument is a userdata and return the Object instance
boolean	raweq(LuaUserdata val) Equals: Perform direct equality comparison with a LuaUserdata value without metatag processing.
boolean	raweq(LuaValue val) Equals: Perform direct equality comparison with another value without metatag processing.
void	set(LuaValue key, LuaValue value) Set a value in a table without metatag processing using LuaValue.NEWINDEX.
LuaValue	setmetatable(LuaValue metatable) Set the metatable for this LuaValue
java.lang.String	tojstring() Convert to human readable String for any type.
java.lang.Object	touserdata() Convert to userdata instance, or null.
java.lang.Object	touserdata(java.lang.Class c) Convert to userdata instance if specific type, or null.
int	type() Get the enumeration value for the type of this value.
java.lang.String	typename() Get the String name of the type of this value.
java.lang.Object	userdata()

Methods inherited from class org.luaj.vm2.LuaValue

add, add, add, and, arg, arg1, argerror, argerror, aritherror, aritherror, arithmt, arithmtwith, assert_, buffer, call, call, call, call, call, callmt, checkboolean, checkclosure, checkdouble, checkfunction, checkglobals, checkint, checkinteger, checkjstring, checklong, checkmetatag, checknotnil, checknumber, checknumber, checkstring, checktable, checkthread, compareerror, compareerror, comparemt, concat, concat, concatmt, concatTo, concatTo, concatTo, div, div, div, divInto, eqmtcall, error, get, get, gettable, gt_b, gt_b, gt_b, gt, gt, gt, gteq_b, gteq_b, gteq_b, gteq, gteq, gteq, illegal, inext, initupvalue1, invoke, invoke, invoke, invoke, invoke, invoke, invokemethod, invokemethod, invokemethod, invokemethod, invokemethod, invokemethod, isboolean, isclosure, isfunction, isint, isinttype, islong, isnil, isnumber, isstring, istable, isthread, isvalidkey, len, lenerror, length, listOf, listOf, load, lt_b, lt_b, lt_b, lt, lt, lt, lteq_b, lteq_b, lteq_b, lteq, lteq, lteq, metatableOf, metatag, method, method, method, method, method, method, mod, mod, mod, modFrom, mul, mul, mul, narg, neg, neq_b, neq, next, not, onInvoke, optboolean, optclosure, optdouble, optfunction, optint, optinteger, optjstring, optlong, optnumber, optstring, opttable, optthread, optvalue, or, pow, pow, pow, powWith, powWith, presize, raweq, raweq, raweq, rawget, rawget, rawget, rawlen, rawset, rawset, rawset, rawset, rawset, rawset, rawset, rawsetlist, set, set, set, set, set, set, settable, strcmp, strcmp, strongvalue, strvalue, sub, sub, sub, subargs, subFrom, subFrom, tableOf, tableOf, tableOf, tableOf, tableOf, tableOf, tailcallOf, testfor_b, toboolean, tobyte, tochar, todouble, tofloat, toint, tolong, tonumber, toshort, tostring, toString, typerror, unimplemented, userdataOf, userdataOf, valueOf, valueOf, valueOf, valueOf, valueOf, valueOf, varargsOf, varargsOf, varargsOf, varargsOf, varargsOf, varargsOf

Methods inherited from class org.luaj.vm2.Varargs

argcheck, checkboolean, checkclosure, checkdouble, checkfunction, checkint, checkinteger, checkjstring, checklong, checknotnil, checknumber, checkstring, checktable, checkthread, checkuserdata, checkuserdata, checkvalue, eval, isfunction, isnil, isnoneornil, isnumber, isstring, istable, isTailcall, isthread, isuserdata, isvalue, optboolean, optclosure, optdouble, optfunction, optint, optinteger, optjstring, optlong, optnumber, optstring, opttable, optthread, optuserdata, optuserdata, optvalue, toboolean, tobyte, tochar, todouble, tofloat, toint, tojstring, tolong, toshort, touserdata, touserdata, type

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

m_instance

public java.lang.Object m_instance

m_metatable

public LuaValue m_metatable

Constructor Detail

LuaUserdata

public LuaUserdata(java.lang.Object obj)

LuaUserdata

public LuaUserdata(java.lang.Object obj,
                   LuaValue metatable)

Method Detail

tojstring

public java.lang.String tojstring()

Description copied from class: LuaValue

Convert to human readable String for any type.

Overrides:

tojstring in class LuaValue

Returns:

String for use by human readers based on type.

See Also:

LuaValue.tostring(), LuaValue.optjstring(String), LuaValue.checkjstring(), LuaValue.isstring(), LuaValue.TSTRING

type

public int type()

Description copied from class: LuaValue

Get the enumeration value for the type of this value.

Specified by:

type in class LuaValue

Returns:

value for this type, one of LuaValue.TNIL, LuaValue.TBOOLEAN, LuaValue.TNUMBER, LuaValue.TSTRING, LuaValue.TTABLE, LuaValue.TFUNCTION, LuaValue.TUSERDATA, LuaValue.TTHREAD

See Also:

LuaValue.typename()

typename

public java.lang.String typename()

Description copied from class: LuaValue

Get the String name of the type of this value.

Specified by:

typename in class LuaValue

Returns:

name from type name list LuaValue.TYPE_NAMES corresponding to the type of this value: "nil", "boolean", "number", "string", "table", "function", "userdata", "thread"

See Also:

LuaValue.type()

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

userdata

public java.lang.Object userdata()

isuserdata

public boolean isuserdata()

Description copied from class: LuaValue

Check if this is a userdata

Overrides:

isuserdata in class LuaValue

Returns:

true if this is a userdata, otherwise false

See Also:

LuaValue.isuserdata(Class), LuaValue.touserdata(), LuaValue.checkuserdata(), LuaValue.optuserdata(Object), LuaValue.TUSERDATA

isuserdata

public boolean isuserdata(java.lang.Class c)

Description copied from class: LuaValue

Check if this is a userdata of type c

Overrides:

isuserdata in class LuaValue

Parameters:

c - Class to test instance against

Returns:

true if this is a userdata and the instance is assignable to c, otherwise false

See Also:

LuaValue.isuserdata(), LuaValue.touserdata(Class), LuaValue.checkuserdata(Class), LuaValue.optuserdata(Class, Object), LuaValue.TUSERDATA

touserdata

public java.lang.Object touserdata()

Description copied from class: LuaValue

Convert to userdata instance, or null.

Overrides:

touserdata in class LuaValue

Returns:

userdata instance if userdata, or null if not LuaUserdata

See Also:

LuaValue.optuserdata(Object), LuaValue.checkuserdata(), LuaValue.isuserdata(), LuaValue.TUSERDATA

touserdata

public java.lang.Object touserdata(java.lang.Class c)

Description copied from class: LuaValue

Convert to userdata instance if specific type, or null.

Overrides:

touserdata in class LuaValue

Returns:

userdata instance if is a userdata whose instance derives from c, or null if not LuaUserdata

See Also:

LuaValue.optuserdata(Class,Object), LuaValue.checkuserdata(Class), LuaValue.isuserdata(Class), LuaValue.TUSERDATA

optuserdata

public java.lang.Object optuserdata(java.lang.Object defval)

Description copied from class: LuaValue

Check that optional argument is a userdata and return the Object instance

Overrides:

optuserdata in class LuaValue

Parameters:

defval - Object to return if this is nil or none

Returns:

Object instance of the userdata if a LuaUserdata, defval if nil or none, throws LuaError if some other type

See Also:

LuaValue.checkuserdata(), LuaValue.isuserdata(), LuaValue.optuserdata(Class, Object), LuaValue.TUSERDATA

optuserdata

public java.lang.Object optuserdata(java.lang.Class c,
                                    java.lang.Object defval)

Description copied from class: LuaValue

Check that optional argument is a userdata whose instance is of a type and return the Object instance

Overrides:

optuserdata in class LuaValue

Parameters:

c - Class to test userdata instance against

defval - Object to return if this is nil or none

Returns:

Object instance of the userdata if a LuaUserdata and instance is assignable to c, defval if nil or none, throws LuaError if some other type

See Also:

LuaValue.checkuserdata(Class), LuaValue.isuserdata(Class), LuaValue.optuserdata(Object), LuaValue.TUSERDATA

getmetatable

public LuaValue getmetatable()

Description copied from class: LuaValue

Get the metatable for this LuaValue

For LuaTable and LuaUserdata instances, the metatable returned is this instance metatable. For all other types, the class metatable value will be returned.

Overrides:

getmetatable in class LuaValue

Returns:

metatable, or null if it there is none

See Also:

LuaBoolean.s_metatable, LuaNumber.s_metatable, LuaNil.s_metatable, LuaFunction.s_metatable, LuaThread.s_metatable

setmetatable

public LuaValue setmetatable(LuaValue metatable)

Description copied from class: LuaValue

Set the metatable for this LuaValue

For LuaTable and LuaUserdata instances, the metatable is per instance. For all other types, there is one metatable per type that can be set directly from java

Overrides:

setmetatable in class LuaValue

Parameters:

metatable - LuaValue instance to serve as the metatable, or null to reset it.

Returns:

this to allow chaining of Java function calls

See Also:

LuaBoolean.s_metatable, LuaNumber.s_metatable, LuaNil.s_metatable, LuaFunction.s_metatable, LuaThread.s_metatable

checkuserdata

public java.lang.Object checkuserdata()

Description copied from class: LuaValue

Check that this is a LuaUserdata, or throw LuaError if it is not

Overrides:

checkuserdata in class LuaValue

Returns:

this if it is a LuaUserdata

See Also:

LuaValue.isuserdata(), LuaValue.optuserdata(Object), LuaValue.checkuserdata(Class), LuaValue.TUSERDATA

checkuserdata

public java.lang.Object checkuserdata(java.lang.Class c)

Description copied from class: LuaValue

Check that this is a LuaUserdata, or throw LuaError if it is not

Overrides:

checkuserdata in class LuaValue

Returns:

this if it is a LuaUserdata

See Also:

LuaValue.isuserdata(Class), LuaValue.optuserdata(Class, Object), LuaValue.checkuserdata(), LuaValue.TUSERDATA

get

public LuaValue get(LuaValue key)

Description copied from class: LuaValue

Get a value in a table including metatag processing using LuaValue.INDEX.

Overrides:

get in class LuaValue

Parameters:

key - the key to look up, must not be LuaValue.NIL or null

Returns:

LuaValue for that key, or LuaValue.NIL if not found and no metatag

See Also:

LuaValue.get(int), LuaValue.get(String), LuaValue.rawget(LuaValue)

set

public void set(LuaValue key,
                LuaValue value)

Description copied from class: LuaValue

Set a value in a table without metatag processing using LuaValue.NEWINDEX.

Overrides:

set in class LuaValue

Parameters:

key - the key to use, must not be LuaValue.NIL or null

value - the value to use, can be LuaValue.NIL, must not be null

equals

public boolean equals(java.lang.Object val)

Overrides:

equals in class LuaValue

eq

public LuaValue eq(LuaValue val)

Description copied from class: LuaValue

Equals: Perform equality comparison with another value including metatag processing using LuaValue.EQ.

Overrides:

eq in class LuaValue

Parameters:

val - The value to compare with.

Returns:

LuaValue.TRUE if values are comparable and (this == rhs), LuaValue.FALSE if comparable but not equal, LuaValue if metatag processing occurs.

See Also:

LuaValue.eq_b(LuaValue), LuaValue.raweq(LuaValue), LuaValue.neq(LuaValue), LuaValue.eqmtcall(LuaValue, LuaValue, LuaValue, LuaValue), LuaValue.EQ

eq_b

public boolean eq_b(LuaValue val)

Description copied from class: LuaValue

Equals: Perform equality comparison with another value including metatag processing using LuaValue.EQ, and return java boolean

Overrides:

eq_b in class LuaValue

Parameters:

val - The value to compare with.

Returns:

true if values are comparable and (this == rhs), false if comparable but not equal, result converted to java boolean if metatag processing occurs.

See Also:

LuaValue.eq(LuaValue), LuaValue.raweq(LuaValue), LuaValue.neq_b(LuaValue), LuaValue.eqmtcall(LuaValue, LuaValue, LuaValue, LuaValue), LuaValue.EQ

raweq

public boolean raweq(LuaValue val)

Description copied from class: LuaValue

Equals: Perform direct equality comparison with another value without metatag processing.

Overrides:

raweq in class LuaValue

Parameters:

val - The value to compare with.

Returns:

true if (this == rhs), false otherwise

See Also:

LuaValue.eq(LuaValue), LuaValue.raweq(LuaUserdata), LuaValue.raweq(LuaString), LuaValue.raweq(double), LuaValue.raweq(int), LuaValue.EQ

raweq

public boolean raweq(LuaUserdata val)

Description copied from class: LuaValue

Equals: Perform direct equality comparison with a LuaUserdata value without metatag processing.

Overrides:

raweq in class LuaValue

Parameters:

val - The LuaUserdata to compare with.

Returns:

true if this is userdata and their metatables are the same using == and their instances are equal using LuaValue.equals(Object), otherwise false

See Also:

LuaValue.eq(LuaValue), LuaValue.raweq(LuaValue)

eqmt

public boolean eqmt(LuaValue val)