Mercurial Hosting > luan
annotate core/src/luan/modules/PackageLuan.java @ 299:a74559240b4f
simplify PackageLuan and remove IO loading param
git-svn-id: https://luan-java.googlecode.com/svn/trunk@300 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Tue, 16 Dec 2014 06:24:49 +0000 |
parents | 899253043270 |
children | a6bf8ff720f8 |
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merge luan/lib into modules
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1 package luan.modules; |
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2 |
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3 import java.io.IOException; |
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4 import java.util.Arrays; |
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5 import java.util.Collections; |
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6 import java.util.List; |
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7 import luan.Luan; |
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8 import luan.LuanState; |
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9 import luan.LuanTable; |
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10 import luan.LuanFunction; |
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11 import luan.LuanJavaFunction; |
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12 import luan.LuanElement; |
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13 import luan.LuanException; |
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14 |
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15 |
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16 public final class PackageLuan { |
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17 |
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18 public static final LuanFunction requireFn; |
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19 static { |
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20 try { |
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21 requireFn = new LuanJavaFunction(PackageLuan.class.getMethod("require",LuanState.class,String.class),null); |
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22 } catch(NoSuchMethodException e) { |
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23 throw new RuntimeException(e); |
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24 } |
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25 } |
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26 |
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27 public static LuanTable loaded(LuanState luan) { |
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28 LuanTable tbl = (LuanTable)luan.registry().get("Package.loaded"); |
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29 if( tbl == null ) { |
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30 tbl = Luan.newTable(); |
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31 luan.registry().put("Package.loaded",tbl); |
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32 } |
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33 return tbl; |
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34 } |
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35 |
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36 public static Object require(LuanState luan,String modName) throws LuanException { |
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37 Object mod = load(luan,modName); |
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38 if( mod==null ) |
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39 throw luan.exception( "module '"+modName+"' not found" ); |
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40 return mod; |
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41 } |
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42 |
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43 public static Object load(LuanState luan,String modName) throws LuanException { |
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44 if( modName.startsWith("java:") ) |
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45 return JavaLuan.load(luan,modName.substring(5)); |
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46 LuanTable loaded = loaded(luan); |
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47 Object mod = loaded.get(modName); |
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48 if( mod == null ) { |
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49 String src = read(luan,modName+".luan"); |
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50 if( src == null ) |
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51 return null; |
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52 LuanFunction loader = BasicLuan.load(luan,src,modName,null,false); |
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53 mod = Luan.first(luan.call(loader,"<require \""+modName+"\">",new Object[]{modName})); |
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54 if( mod != null ) { |
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55 loaded.put(modName,mod); |
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56 } else { |
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57 mod = loaded.get(modName); |
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58 if( mod==null ) { |
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59 mod = true; |
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60 loaded.put(modName,mod); |
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61 } |
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62 } |
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63 } |
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64 return mod; |
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65 } |
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66 |
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67 static String read(LuanState luan,String uri) throws LuanException { |
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68 LuanTable t = IoLuan.Uri(luan,uri); |
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69 if( t == null ) |
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70 return null; |
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71 LuanFunction reader = (LuanFunction)t.get("read_text"); |
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72 return (String)Luan.first(luan.call(reader)); |
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73 } |
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74 |
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75 } |