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comparison core/src/luan/impl/SetTableEntry.java @ 171:3dcb0f9bee82
add core component
git-svn-id: https://luan-java.googlecode.com/svn/trunk@172 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Sun, 22 Jun 2014 05:41:22 +0000 |
parents | src/luan/impl/SetTableEntry.java@4eaee12f6c65 |
children | cf939124461a |
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170:7c792a328a83 | 171:3dcb0f9bee82 |
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1 package luan.impl; | |
2 | |
3 import luan.LuanException; | |
4 import luan.LuanTable; | |
5 import luan.Luan; | |
6 import luan.LuanFunction; | |
7 import luan.LuanSource; | |
8 | |
9 | |
10 final class SetTableEntry extends CodeImpl implements Settable { | |
11 private final Expr tableExpr; | |
12 private final Expr keyExpr; | |
13 | |
14 SetTableEntry(LuanSource.Element se,Expr tableExpr,Expr keyExpr) { | |
15 super(se); | |
16 this.tableExpr = tableExpr; | |
17 this.keyExpr = keyExpr; | |
18 } | |
19 | |
20 @Override public void set(LuanStateImpl luan,Object value) throws LuanException { | |
21 newindex( luan, tableExpr.eval(luan), keyExpr.eval(luan), value ); | |
22 } | |
23 | |
24 private void newindex(LuanStateImpl luan,Object t,Object key,Object value) throws LuanException { | |
25 Object h; | |
26 if( t instanceof LuanTable ) { | |
27 LuanTable table = (LuanTable)t; | |
28 Object old = table.put(key,value); | |
29 if( old != null ) | |
30 return; | |
31 h = luan.getHandler("__newindex",t); | |
32 if( h==null ) | |
33 return; | |
34 table.put(key,old); | |
35 } else { | |
36 h = luan.getHandler("__newindex",t); | |
37 if( h==null ) | |
38 throw luan.bit(se).exception( "attempt to index a " + Luan.type(t) + " value" ); | |
39 } | |
40 if( h instanceof LuanFunction ) { | |
41 LuanFunction fn = (LuanFunction)h; | |
42 luan.bit(se).call(fn,"__newindex",new Object[]{t,key,value}); | |
43 return; | |
44 } | |
45 newindex(luan,h,key,value); | |
46 } | |
47 | |
48 } |