Mercurial Hosting > luan
annotate src/luan/modules/PackageLuan.java @ 168:ebe9db183eb7
rename *Lib.java to *Luan.java
git-svn-id: https://luan-java.googlecode.com/svn/trunk@169 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 04:42:07 +0000 |
parents | src/luan/modules/PackageLib.java@4c0131c2b650 |
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167
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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 private static final String jpath = "luan.modules.?Luan.LOADER"; |
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19 |
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20 public static final LuanFunction LOADER = new LuanFunction() { |
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21 @Override public Object call(LuanState luan,Object[] args) { |
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22 LuanTable module = new LuanTable(); |
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23 module.put("loaded",luan.loaded()); |
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24 module.put("preload",luan.preload()); |
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25 module.put("path","?.luan;java:luan/modules/?.luan"); |
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26 module.put("jpath",jpath); |
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27 try { |
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28 add( module, "require", LuanState.class, String.class ); |
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29 add( module, "load_lib", String.class ); |
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30 add( module, "search_path", String.class, String.class ); |
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31 add( module, "search", LuanState.class, String.class ); |
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32 } catch(NoSuchMethodException e) { |
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33 throw new RuntimeException(e); |
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34 } |
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35 LuanTable searchers = luan.searchers(); |
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36 searchers.add(preloadSearcher); |
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37 searchers.add(fileSearcher); |
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38 searchers.add(javaSearcher); |
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39 module.put("searchers",searchers); |
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40 return module; |
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41 } |
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42 }; |
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43 |
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44 private static void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException { |
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45 t.put( method, new LuanJavaFunction(PackageLuan.class.getMethod(method,parameterTypes),null) ); |
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46 } |
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47 |
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48 public static Object require(LuanState luan,String modName) throws LuanException { |
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49 LuanTable loaded = luan.loaded(); |
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50 Object mod = loaded.get(modName); |
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51 if( mod == null ) { |
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52 Object[] a = search(luan,modName); |
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53 if( a == null ) |
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54 throw luan.exception( "module '"+modName+"' not found" ); |
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55 LuanFunction loader = (LuanFunction)a[0]; |
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56 a[0] = modName; |
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57 mod = Luan.first(luan.call(loader,"<require \""+modName+"\">",a)); |
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58 if( mod != null ) { |
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59 loaded.put(modName,mod); |
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60 } else { |
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61 mod = loaded.get(modName); |
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62 if( mod==null ) |
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63 loaded.put(modName,true); |
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64 } |
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65 } |
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66 return mod; |
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67 } |
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68 |
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69 public static Object[] search(LuanState luan,String modName) throws LuanException { |
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70 List<Object> list = null; |
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71 LuanTable searchers = (LuanTable)luan.get("Package.searchers"); |
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72 if( searchers == null ) { |
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73 list = Collections.<Object>singletonList(javaSearcher); |
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74 } else { |
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75 list = searchers.asList(); |
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76 } |
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77 for( Object s : list ) { |
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78 LuanFunction searcher = (LuanFunction)s; |
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79 Object[] a = Luan.array(luan.call(searcher,"<searcher>",new Object[]{modName})); |
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80 if( a.length >= 1 && a[0] instanceof LuanFunction ) |
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81 return a; |
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82 } |
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83 return null; |
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84 } |
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85 |
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86 public static final LuanFunction preloadSearcher = new LuanFunction() { |
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87 @Override public Object call(LuanState luan,Object[] args) { |
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88 String modName = (String)args[0]; |
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89 return luan.preload().get(modName); |
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90 } |
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91 }; |
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92 |
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93 public static String search_path(String name,String path) { |
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94 name = name.replace('.','/'); |
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95 for( String s : path.split(";") ) { |
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96 String file = s.replaceAll("\\?",name); |
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97 if( Utils.exists(file) ) |
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98 return file; |
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99 } |
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100 return null; |
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101 } |
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102 |
108
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103 public static final LuanFunction fileLoader = new LuanFunction() { |
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104 @Override public Object call(LuanState luan,Object[] args) throws LuanException { |
108
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105 String fileName = (String)args[1]; |
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106 LuanFunction fn = BasicLuan.load_file(luan,fileName); |
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107 return fn.call(luan,args); |
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108 } |
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109 }; |
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110 |
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111 public static final LuanFunction fileSearcher = new LuanFunction() { |
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112 @Override public Object[] call(LuanState luan,Object[] args) { |
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113 String modName = (String)args[0]; |
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114 String path = (String)luan.get("Package.path"); |
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115 if( path==null ) |
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116 return LuanFunction.NOTHING; |
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117 String file = search_path(modName,path); |
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118 return file==null ? LuanFunction.NOTHING : new Object[]{fileLoader,file}; |
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119 } |
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120 }; |
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121 |
161
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122 |
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123 public static final LuanFunction javaLoader = new LuanFunction() { |
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124 @Override public Object call(LuanState luan,Object[] args) throws LuanException { |
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125 try { |
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126 String objName = (String)args[1]; |
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127 LuanFunction fn = load_lib(objName); |
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128 return fn.call(luan,args); |
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129 } catch(ClassNotFoundException e) { |
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130 throw new RuntimeException(e); |
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131 } catch(NoSuchFieldException e) { |
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132 throw new RuntimeException(e); |
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133 } catch(IllegalAccessException e) { |
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134 throw new RuntimeException(e); |
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135 } |
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136 } |
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137 }; |
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138 |
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139 public static final LuanFunction javaSearcher = new LuanFunction() { |
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140 @Override public Object[] call(LuanState luan,Object[] args) { |
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141 String modName = (String)args[0]; |
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142 String path = (String)luan.get("Package.jpath"); |
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143 if( path==null ) |
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144 path = jpath; |
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145 for( String s : path.split(";") ) { |
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146 String objName = s.replaceAll("\\?",modName); |
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147 try { |
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148 load_lib(objName); // throws exception if not found |
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149 return new Object[]{javaLoader,objName}; |
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150 } catch(ClassNotFoundException e) { |
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151 } catch(NoSuchFieldException e) { |
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152 } catch(IllegalAccessException e) { |
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153 } |
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154 } |
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155 return LuanFunction.NOTHING; |
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156 } |
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157 }; |
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158 |
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159 |
161
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160 public static LuanFunction load_lib(String path) |
141
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161 throws ClassNotFoundException, NoSuchFieldException, IllegalAccessException |
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162 { |
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163 int i = path.lastIndexOf('.'); |
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164 String clsPath = path.substring(0,i); |
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165 String fld = path.substring(i+1); |
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166 Class cls = Class.forName(clsPath); |
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167 return (LuanFunction)cls.getField(fld).get(null); |
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168 } |
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169 |
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170 } |