Mercurial Hosting > luan
annotate core/src/luan/LuanState.java @ 646:cdc70de628b5
simplify LuanException
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Tue, 29 Mar 2016 19:58:39 -0600 |
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1 package luan; |
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2 |
527 | 3 import java.io.Closeable; |
4 import java.io.IOException; | |
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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 |
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18 private Map registry; |
527 | 19 private final List<Reference<Closeable>> onClose = new ArrayList<Reference<Closeable>>(); |
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20 |
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21 protected LuanState() { |
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22 registry = new HashMap(); |
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23 } |
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add Package.block();
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24 |
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25 protected LuanState(LuanState luan) {} |
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26 |
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27 @Override public void deepenClone(DeepCloneable clone,DeepCloner cloner) { |
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28 ((LuanState)clone).registry = cloner.deepClone(registry); |
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29 } |
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30 |
503 | 31 public abstract boolean hasJava(); |
32 public abstract void setJava(); | |
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33 |
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34 public final Map registry() { |
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35 return registry; |
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36 } |
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37 |
527 | 38 public void onClose(Closeable c) { |
39 onClose.add(new WeakReference<Closeable>(c)); | |
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40 } |
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41 |
527 | 42 public void close() throws IOException { |
43 for( Reference<Closeable> ref : onClose ) { | |
44 Closeable c = ref.get(); | |
45 if( c != null ) | |
46 c.close(); | |
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47 } |
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48 onClose.clear(); |
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49 } |
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50 |
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51 public static LuanState newInstance() { |
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52 return LuanCompiler.newLuanState(); |
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53 } |
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54 |
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55 public final Object eval(String cmd) throws LuanException { |
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56 return eval(cmd,new LuanTable()); |
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57 } |
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58 |
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59 public final Object eval(String cmd,LuanTable env) throws LuanException { |
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60 LuanFunction fn = BasicLuan.load(this,cmd,"eval",env,true); |
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61 return fn.call(this); |
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62 } |
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63 |
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64 |
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65 public Boolean checkBoolean(Object obj) throws LuanException { |
576 | 66 if( obj instanceof Boolean ) |
67 return (Boolean)obj; | |
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68 throw new LuanException("attempt to use a " + Luan.type(obj) + " value as a boolean" ); |
576 | 69 } |
70 | |
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71 public String checkString(Object obj) throws LuanException { |
576 | 72 if( obj instanceof String ) |
73 return (String)obj; | |
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74 throw new LuanException("attempt to use a " + Luan.type(obj) + " value as a string" ); |
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75 } |
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76 |
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77 public LuanFunction checkFunction(Object obj) throws LuanException { |
576 | 78 if( obj instanceof LuanFunction ) |
79 return (LuanFunction)obj; | |
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80 throw new LuanException("attempt to call a " + Luan.type(obj) + " value" ); |
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81 } |
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82 |
579 | 83 abstract public boolean isLessThan(Object o1,Object o2) throws LuanException; |
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84 |
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85 public String toString(Object obj) throws LuanException { |
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86 if( obj instanceof LuanTable ) { |
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87 LuanTable tbl = (LuanTable)obj; |
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88 return tbl.toString(this); |
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89 } |
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90 if( obj == null ) |
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91 return "nil"; |
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92 if( obj instanceof Number ) |
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93 return Luan.toString((Number)obj); |
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94 if( obj instanceof byte[] ) |
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95 return "binary: " + Integer.toHexString(obj.hashCode()); |
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96 return obj.toString(); |
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97 } |
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98 |
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99 public Object index(Object obj,Object key) throws LuanException { |
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100 if( obj instanceof LuanTable ) { |
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101 LuanTable tbl = (LuanTable)obj; |
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102 return tbl.get(this,key); |
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103 } |
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104 if( obj != null && hasJava() ) |
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105 return JavaLuan.__index(this,obj,key,false); |
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106 throw new LuanException("attempt to index a " + Luan.type(obj) + " value" ); |
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107 } |
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108 |
576 | 109 /* |
110 public Number checkNumber(Object obj) throws LuanException { | |
111 if( obj instanceof Number ) | |
112 return (Number)obj; | |
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113 throw new LuanException(this, "attempt to perform arithmetic on '"+context()+"' (a " + Luan.type(obj) + " value)" ); |
576 | 114 } |
115 */ | |
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116 } |