Mercurial Hosting > luan
annotate core/src/luan/LuanState.java @ 579:f22a09e98b04
clean up LuanState
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Thu, 16 Jul 2015 15:14:31 -0600 |
parents | 60c549d43988 |
children | 859c0dedc8b6 |
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1 package luan; |
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2 |
527 | 3 import java.io.Closeable; |
4 import java.io.IOException; | |
521
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5 import java.lang.ref.Reference; |
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6 import java.lang.ref.WeakReference; |
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7 import java.util.List; |
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8 import java.util.ArrayList; |
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9 import java.util.Map; |
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10 import java.util.HashMap; |
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11 import luan.impl.LuanCompiler; |
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12 import luan.modules.BasicLuan; |
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13 import luan.modules.JavaLuan; |
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14 |
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15 |
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16 public abstract class LuanState implements DeepCloneable { |
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17 |
579 | 18 protected final List<StackTraceElement> stackTrace = new ArrayList<StackTraceElement>(); |
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19 |
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20 private Map registry; |
527 | 21 private final List<Reference<Closeable>> onClose = new ArrayList<Reference<Closeable>>(); |
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22 |
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23 protected LuanState() { |
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24 registry = new HashMap(); |
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25 } |
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26 |
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27 protected LuanState(LuanState luan) {} |
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28 |
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29 @Override public void deepenClone(DeepCloneable clone,DeepCloner cloner) { |
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30 ((LuanState)clone).registry = cloner.deepClone(registry); |
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31 } |
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32 |
503 | 33 public abstract boolean hasJava(); |
34 public abstract void setJava(); | |
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35 public abstract LuanSource currentSource(); |
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36 |
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37 public final Map registry() { |
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38 return registry; |
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39 } |
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40 |
527 | 41 public void onClose(Closeable c) { |
42 onClose.add(new WeakReference<Closeable>(c)); | |
517
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43 } |
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44 |
527 | 45 public void close() throws IOException { |
46 for( Reference<Closeable> ref : onClose ) { | |
47 Closeable c = ref.get(); | |
48 if( c != null ) | |
49 c.close(); | |
517
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50 } |
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51 onClose.clear(); |
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52 } |
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53 |
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54 public static LuanState newInstance() { |
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55 return LuanCompiler.newLuanState(); |
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56 } |
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57 |
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58 public final Object eval(String cmd) throws LuanException { |
408
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59 return eval(cmd,new LuanTable()); |
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60 } |
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61 |
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62 public final Object eval(String cmd,LuanTable env) throws LuanException { |
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63 LuanFunction fn = BasicLuan.load(this,cmd,"eval",env,true); |
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64 return fn.call(this); |
59
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65 } |
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66 |
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67 |
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68 public Boolean checkBoolean(Object obj) throws LuanException { |
576 | 69 if( obj instanceof Boolean ) |
70 return (Boolean)obj; | |
578
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71 throw new LuanException(this, "attempt to use '"+context()+"' (a " + Luan.type(obj) + " value) as a boolean" ); |
576 | 72 } |
73 | |
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74 public String checkString(Object obj) throws LuanException { |
576 | 75 if( obj instanceof String ) |
76 return (String)obj; | |
578
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77 throw new LuanException(this, "attempt to use '"+context()+"' (a " + Luan.type(obj) + " value) as a string" ); |
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78 } |
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79 |
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80 public LuanFunction checkFunction(Object obj) throws LuanException { |
576 | 81 if( obj instanceof LuanFunction ) |
82 return (LuanFunction)obj; | |
578
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83 throw new LuanException(this, "attempt to call '"+context()+"' (a " + Luan.type(obj) + " value)" ); |
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84 } |
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85 |
579 | 86 abstract public boolean isLessThan(Object o1,Object o2) throws LuanException; |
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87 |
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88 public String toString(Object obj) throws LuanException { |
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89 if( obj instanceof LuanTable ) { |
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90 LuanTable tbl = (LuanTable)obj; |
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91 return tbl.toString(this); |
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92 } |
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93 if( obj == null ) |
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94 return "nil"; |
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95 if( obj instanceof Number ) |
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96 return Luan.toString((Number)obj); |
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97 if( obj instanceof byte[] ) |
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98 return "binary: " + Integer.toHexString(obj.hashCode()); |
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99 return obj.toString(); |
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100 } |
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101 |
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102 public Object index(Object obj,Object key) throws LuanException { |
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103 if( obj instanceof LuanTable ) { |
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104 LuanTable tbl = (LuanTable)obj; |
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105 return tbl.get(this,key); |
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106 } |
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107 if( obj != null && hasJava() ) |
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108 return JavaLuan.__index(this,obj,key,false); |
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109 throw new LuanException(this, "attempt to index a " + Luan.type(obj) + " value in '"+context()+"'" ); |
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110 } |
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111 |
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112 public String context() { |
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113 return stackTrace.get(stackTrace.size()-1).call.text(); |
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114 } |
576 | 115 |
116 public void dumpStack() { | |
117 System.err.println( stackTrace ); | |
118 } | |
119 /* | |
120 public Number checkNumber(Object obj) throws LuanException { | |
121 if( obj instanceof Number ) | |
122 return (Number)obj; | |
578
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123 throw new LuanException(this, "attempt to perform arithmetic on '"+context()+"' (a " + Luan.type(obj) + " value)" ); |
576 | 124 } |
125 */ | |
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126 } |