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annotate src/luan/modules/PackageLuan.java @ 1434:56fb5cd8228d

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cache compiled code in temp files
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 29 Dec 2019 15:25:07 -0700
parents 8d95711f6615
children 0ba144491a42
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rev   line source
167
4c0131c2b650 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.Reader;
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4 import java.io.InputStreamReader;
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5 import java.io.IOException;
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6 import java.util.Arrays;
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7 import java.util.Collections;
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8 import luan.Luan;
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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.LuanCloner;
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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 LuanFunction requireFn(Luan luan) {
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19 LuanFunction fn = (LuanFunction)luan.registry().get("Package.require");
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20 if( fn == null ) {
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21 try {
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22 fn = new LuanJavaFunction(luan,PackageLuan.class.getMethod("require",Luan.class,String.class),null);
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23 } catch(NoSuchMethodException e) {
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24 throw new RuntimeException(e);
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25 }
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26 luan.registry().put("Package.require",fn);
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27 }
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28 return fn;
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29 }
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30
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31 public static LuanTable loaded(Luan luan) {
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32 LuanTable tbl = (LuanTable)luan.registry().get("Package.loaded");
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33 if( tbl == null ) {
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34 tbl = new LuanTable(luan);
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35 luan.registry().put("Package.loaded",tbl);
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36 }
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37 return tbl;
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38 }
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39
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40 public static Object require(Luan luan,String modName) throws LuanException {
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41 if( "java".equals(modName) ) {
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42 JavaLuan.java(luan);
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43 return true;
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44 }
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45 Object mod = load(luan,modName);
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46 if( mod.equals(Boolean.FALSE) )
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47 throw new LuanException( "module '"+modName+"' not found" );
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48 return mod;
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49 }
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50
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51 public static Object load(Luan luan,String modName) throws LuanException {
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52 LuanTable loaded = loaded(luan);
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53 Object mod = loaded.rawGet(modName);
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54 if( mod == null ) {
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55 if( modName.equals("luan:Boot.luan") ) {
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56 String src;
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57 try {
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58 Reader in = new InputStreamReader(ClassLoader.getSystemResourceAsStream("luan/modules/Boot.luan"));
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59 src = Utils.readAll(in);
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60 in.close();
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61 } catch(IOException e) {
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62 throw new RuntimeException(e);
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63 }
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64 LuanFunction loader = luan.load(src,modName,true);
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65 mod = Luan.first(
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66 loader.call(modName)
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67 );
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68 if( mod == null )
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69 throw new RuntimeException();
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70 } else if( modName.startsWith("java:") ) {
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71 mod = JavaLuan.load(luan,modName.substring(5));
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72 if( mod == null )
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73 mod = Boolean.FALSE;
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74 } else {
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75 String src = read(luan,modName);
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76 if( src == null ) {
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77 mod = Boolean.FALSE;
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78 } else {
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79 LuanFunction loader = luan.load(src,modName,true);
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80 mod = Luan.first(
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81 loader.call(modName)
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82 );
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83 if( mod == null ) {
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84 mod = loaded.rawGet(modName);
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85 if( mod != null )
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86 return mod;
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87 throw new LuanException( "module '"+modName+"' returned nil" );
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88 }
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89 }
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90 }
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91 loaded.rawPut(modName,mod);
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92 }
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93 return mod;
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94 }
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95
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96 static String read(Luan luan,String uri) {
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97 LuanTable boot;
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98 try {
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99 boot = (LuanTable)luan.require("luan:Boot.luan");
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100 } catch(LuanException e) {
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101 throw new RuntimeException(e);
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102 }
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103 Luan.Security security = Luan.setSecurity(luan,null);
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104 try {
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105 return (String)Luan.first(boot.fn("read").call(uri));
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106 } catch(LuanException e) {
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107 return null;
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108 } finally {
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109 if( security != null )
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110 Luan.setSecurity(luan,security);
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111 }
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112 }
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113
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114 }