Mercurial Hosting > luan
annotate 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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1 package luan.impl; |
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2 |
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3 import luan.LuanException; |
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4 import luan.LuanTable; |
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5 import luan.Luan; |
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6 import luan.LuanFunction; |
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7 import luan.LuanSource; |
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8 |
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9 |
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10 final class SetTableEntry extends CodeImpl implements Settable { |
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11 private final Expr tableExpr; |
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12 private final Expr keyExpr; |
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13 |
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14 SetTableEntry(LuanSource.Element se,Expr tableExpr,Expr keyExpr) { |
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15 super(se); |
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16 this.tableExpr = tableExpr; |
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17 this.keyExpr = keyExpr; |
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18 } |
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19 |
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20 @Override public void set(LuanStateImpl luan,Object value) throws LuanException { |
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21 newindex( luan, tableExpr.eval(luan), keyExpr.eval(luan), value ); |
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22 } |
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23 |
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24 private void newindex(LuanStateImpl luan,Object t,Object key,Object value) throws LuanException { |
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25 Object h; |
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26 if( t instanceof LuanTable ) { |
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27 LuanTable table = (LuanTable)t; |
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28 Object old = table.put(key,value); |
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29 if( old != null ) |
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30 return; |
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31 h = luan.getHandler("__newindex",t); |
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32 if( h==null ) |
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33 return; |
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34 table.put(key,old); |
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35 } else { |
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36 h = luan.getHandler("__newindex",t); |
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37 if( h==null ) |
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38 throw luan.bit(se).exception( "attempt to index a " + Luan.type(t) + " value" ); |
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39 } |
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40 if( h instanceof LuanFunction ) { |
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41 LuanFunction fn = (LuanFunction)h; |
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42 luan.bit(se).call(fn,"__newindex",new Object[]{t,key,value}); |
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43 return; |
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44 } |
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45 newindex(luan,h,key,value); |
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46 } |
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47 |
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48 } |