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annotate core/src/luan/modules/PackageLuan.java @ 297:899253043270

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remove PackageLuan.load_lib() git-svn-id: https://luan-java.googlecode.com/svn/trunk@298 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Tue, 16 Dec 2014 03:26:43 +0000
parents 7ea6dfdf81ba
children a74559240b4f
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1 package luan.modules;
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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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16 public final class PackageLuan {
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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 return luan.registryTable("Package.loaded");
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29 }
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31 private static Object pkg(LuanState luan,String key) {
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32 LuanTable t = (LuanTable)loaded(luan).get("Package");
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33 return t==null ? null : t.get(key);
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34 }
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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 LuanTable loaded = loaded(luan);
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45 Object mod = loaded.get(modName);
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46 if( mod == null ) {
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47 Object[] a = search(luan,modName);
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48 if( a == null )
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49 return null;
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50 LuanFunction loader = (LuanFunction)a[0];
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51 a[0] = modName;
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52 mod = Luan.first(luan.call(loader,"<require \""+modName+"\">",a));
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53 if( mod != null ) {
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54 loaded.put(modName,mod);
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55 } else {
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56 mod = loaded.get(modName);
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57 if( mod==null ) {
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58 mod = true;
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59 loaded.put(modName,mod);
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60 }
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61 }
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62 }
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63 return mod;
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64 }
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65
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66 static LuanFunction loader(LuanState luan,String name,boolean loading,LuanTable env) throws LuanException {
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67 LuanTable t = IoLuan.Uri(luan,name,loading);
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68 if( t == null )
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69 return null;
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70 LuanFunction loader = (LuanFunction)t.get("loader");
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71 if( loader == null )
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72 return null;
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73 return (LuanFunction)Luan.first(luan.call(loader,new Object[]{name,env}));
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74 }
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76 public static Object[] search(LuanState luan,String modName) throws LuanException {
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77 LuanFunction fn = loader(luan,modName,true,null);
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78 return fn==null ? null : new Object[]{fn,modName};
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79 }
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81 }