Mercurial Hosting > luan

comparison src/luan/interp/Utils.java @ 35:e51906de0f11

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
implement metatables git-svn-id: https://luan-java.googlecode.com/svn/trunk@36 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Tue, 18 Dec 2012 07:05:58 +0000
parents
children 2a35154aec14
comparison
equal deleted inserted replaced
34:0cdc1da466ee 35:e51906de0f11
1 package luan.interp;
2
3 import luan.Lua;
4 import luan.LuaFunction;
5 import luan.LuaTable;
6 import luan.LuaException;
7
8
9 final class Utils {
10 private Utils() {} // never
11
12 static Object first(Object[] a) {
13 return a.length==0 ? null : a[0];
14 }
15
16 static final Object getHandlerObject(String op,Object obj) throws LuaException {
17 LuaTable t = Lua.getMetatable(obj);
18 return t==null ? null : t.get(op);
19 }
20
21 static final LuaFunction getHandler(String op,Object obj) throws LuaException {
22 Object f = getHandlerObject(op,obj);
23 if( f == null )
24 return null;
25 return Lua.checkFunction(f);
26 }
27
28 }