org.luaj.vm2.lib.jse

类 JseOsLib

java.lang.Object

org.luaj.vm2.Varargs

org.luaj.vm2.LuaValue

org.luaj.vm2.LuaFunction

org.luaj.vm2.lib.LibFunction

org.luaj.vm2.lib.TwoArgFunction

org.luaj.vm2.lib.OsLib

org.luaj.vm2.lib.jse.JseOsLib

public class JseOsLib
extends OsLib

Subclass of LibFunction which implements the standard lua os library.

This contains more complete implementations of the following functions using features that are specific to JSE:

• execute()
• remove()
• rename()
• tmpname()

Because the nature of the os library is to encapsulate os-specific features, the behavior of these functions varies considerably from their counterparts in the C platform.

Typically, this library is included as part of a call to JsePlatform.standardGlobals()

 
 Globals globals = JsePlatform.standardGlobals();
 System.out.println( globals.get("os").get("time").call() );
  

For special cases where the smallest possible footprint is desired, a minimal set of libraries could be loaded directly via LuaValue.load(LuaValue) using code such as:

 
 Globals globals = new Globals();
 globals.load(new JseBaseLib());
 globals.load(new PackageLib());
 globals.load(new JseOsLib());
 System.out.println( globals.get("os").get("time").call() );
  

However, other libraries such as MathLib are not loaded in this case.

另请参阅:

LibFunction, OsLib, JsePlatform, org.luaj.vm2.lib.jme.JmePlatform, Lua 5.2 OS Lib Reference

字段概要

字段

限定符和类型	字段和说明
static int	EXEC_ERROR return code indicating the execute() threw an unknown exception
static int	EXEC_INTERRUPTED return code indicating the execute() was interrupted
static int	EXEC_IOEXCEPTION return code indicating the execute() threw an I/O exception

从类继承的字段 org.luaj.vm2.lib.OsLib

globals, TMP_PREFIX, TMP_SUFFIX

从类继承的字段 org.luaj.vm2.lib.LibFunction

name, opcode

从类继承的字段 org.luaj.vm2.LuaFunction

s_metatable

从类继承的字段 org.luaj.vm2.LuaValue

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

构造器概要

构造器

构造器和说明
JseOsLib() public constructor

方法概要

限定符和类型	方法和说明
protected Varargs	execute(String command) This function is equivalent to the C function system.
protected String	getenv(String varname) Returns the value of the process environment variable varname, or the System property value for varname, or null if the variable is not defined in either environment.
protected void	remove(String filename) Deletes the file or directory with the given name.
protected void	rename(String oldname, String newname) Renames file or directory named oldname to newname.
protected String	tmpname() Returns a string with a file name that can be used for a temporary file.

从类继承的方法 org.luaj.vm2.lib.OsLib

call, clock, date, difftime, exit, setlocale, time

从类继承的方法 org.luaj.vm2.lib.TwoArgFunction

call, call, call, invoke

从类继承的方法 org.luaj.vm2.lib.LibFunction

bind, bind, call, newupe, newupl, newupn, tojstring

从类继承的方法 org.luaj.vm2.LuaFunction

checkfunction, classnamestub, getfenv, getmetatable, isfunction, name, optfunction, setfenv, strvalue, type, typename

从类继承的方法 org.luaj.vm2.LuaValue

add, add, add, and, arg, arg1, argerror, argerror, aritherror, aritherror, arithmt, arithmtwith, assert_, band, band, bnot, bor, bor, buffer, bxor, bxor, call, callmt, checkboolean, checkclosure, checkdouble, checkglobals, checkint, checkinteger, checkjstring, checklong, checkmetatag, checknotnil, checknumber, checknumber, checkstring, checktable, checkthread, checkuserdata, checkuserdata, compareerror, compareerror, comparemt, concat, concat, concatmt, concatTo, concatTo, concatTo, div, div, div, divInto, eq_b, eq, eqmtcall, equals, error, get, get, get, gettable, getuservalue, gt_b, gt_b, gt_b, gt, gt, gt, gteq_b, gteq_b, gteq_b, gteq, gteq, gteq, idiv, idiv, illegal, inext, initupvalue1, invoke, invoke, invoke, invoke, invoke, invokemethod, invokemethod, invokemethod, invokemethod, invokemethod, invokemethod, isboolean, isclosure, isint, isinttype, islong, isnil, isnumber, isstring, istable, isthread, isuserdata, isuserdata, isvalidkey, jcall, jget, jset, 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, optint, optinteger, optjstring, optlong, optnumber, optstring, opttable, optthread, optuserdata, optuserdata, optvalue, or, pow, pow, pow, powWith, powWith, presize, raweq, raweq, raweq, raweq, raweq, rawget, rawget, rawget, rawlen, rawset, rawset, rawset, rawset, rawset, rawset, rawset, rawsetlist, set, set, set, set, set, set, set, setmetatable, settable, setuservalue, shl, shl, shr, shr, strcmp, strcmp, strongvalue, 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, touserdata, touserdata, typerror, unimplemented, userdataOf, userdataOf, valueOf, valueOf, valueOf, valueOf, valueOf, valueOf, valueOf, varargsOf, varargsOf, varargsOf, varargsOf, varargsOf, varargsOf

从类继承的方法 org.luaj.vm2.Varargs

argcheck, checkboolean, checkclosure, checkdouble, checkfunction, checkint, checkinteger, checkjstring, checklong, checknotnil, checknumber, checkstring, checktable, checkthread, checkuserdata, checkuserdata, checkvalue, dealias, 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

从类继承的方法 java.lang.Object

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

字段详细资料

EXEC_IOEXCEPTION

public static int EXEC_IOEXCEPTION

return code indicating the execute() threw an I/O exception

EXEC_INTERRUPTED

public static int EXEC_INTERRUPTED

return code indicating the execute() was interrupted

EXEC_ERROR

public static int EXEC_ERROR

return code indicating the execute() threw an unknown exception

构造器详细资料

JseOsLib

public JseOsLib()

public constructor

方法详细资料

getenv

protected String getenv(String varname)

从类复制的说明: OsLib

Returns the value of the process environment variable varname, or the System property value for varname, or null if the variable is not defined in either environment. The default implementation, which is used by the JmePlatform, only queryies System.getProperty(). The JsePlatform overrides this behavior and returns the environment variable value using System.getenv() if it exists, or the System property value if it does not. A SecurityException may be thrown if access is not allowed for 'varname'.

覆盖:

getenv 在类中 OsLib

返回:

String value, or null if not defined

execute

protected Varargs execute(String command)

从类复制的说明: OsLib

This function is equivalent to the C function system. It passes command to be executed by an operating system shell. It returns a status code, which is system-dependent. If command is absent, then it returns nonzero if a shell is available and zero otherwise.

覆盖:

execute 在类中 OsLib

参数:

command - command to pass to the system

remove

protected void remove(String filename)
               throws IOException

从类复制的说明: OsLib

Deletes the file or directory with the given name. Directories must be empty to be removed. If this function fails, it throws and IOException

覆盖:

remove 在类中 OsLib

抛出:

IOException - if it fails

rename

protected void rename(String oldname,
                      String newname)
               throws IOException

从类复制的说明: OsLib

Renames file or directory named oldname to newname. If this function fails,it throws and IOException

覆盖:

rename 在类中 OsLib

参数:

oldname - old file name

newname - new file name

抛出:

IOException - if it fails

tmpname

protected String tmpname()

从类复制的说明: OsLib

Returns a string with a file name that can be used for a temporary file. The file must be explicitly opened before its use and explicitly removed when no longer needed. On some systems (POSIX), this function also creates a file with that name, to avoid security risks. (Someone else might create the file with wrong permissions in the time between getting the name and creating the file.) You still have to open the file to use it and to remove it (even if you do not use it).

覆盖:

tmpname 在类中 OsLib

返回:

String filename to use