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annotate core/src/luan/modules/PackageLuan.java @ 301:a6bf8ff720f8

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add java security git-svn-id: https://luan-java.googlecode.com/svn/trunk@302 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Wed, 17 Dec 2014 12:35:57 +0000
parents a74559240b4f
children d34be4588556
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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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14
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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 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 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 if( modName.startsWith("java:") ) {
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48 mod = JavaLuan.load(luan,modName.substring(5));
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49 } else {
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50 String src = read(luan,modName+".luan");
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51 if( src == null )
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52 return null;
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53 LuanFunction loader = BasicLuan.load(luan,src,modName,null,false);
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54 mod = Luan.first(
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55 luan.call(loader,"<require \""+modName+"\">",new Object[]{modName})
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56 );
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57 }
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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 mod = true;
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64 loaded.put(modName,mod);
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65 }
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66 }
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67 }
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68 return mod;
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69 }
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71 static String read(LuanState luan,String uri) throws LuanException {
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72 LuanTable t = IoLuan.Uri(luan,uri);
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73 if( t == null )
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74 return null;
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75 LuanFunction existsFn = (LuanFunction)t.get("exists");
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76 boolean exists = (Boolean)Luan.first(luan.call(existsFn));
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77 if( !exists )
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78 return null;
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79 LuanFunction reader = (LuanFunction)t.get("read_text");
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80 return (String)Luan.first(luan.call(reader));
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81 }
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83 }