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annotate core/src/luan/LuanState.java @ 575:7c3ad6db8ac3

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make LuanState.JAVA private
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 13 Jul 2015 18:34:31 -0600
parents 6cc2f047019b
children 4723d22062ce
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1 package luan;
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2
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3 import java.io.Closeable;
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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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16 public abstract class LuanState implements DeepCloneable {
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18 final List<StackTraceElement> stackTrace = new ArrayList<StackTraceElement>();
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20 private Map registry;
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21 private final List<Reference<Closeable>> onClose = new ArrayList<Reference<Closeable>>();
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23 protected LuanState() {
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24 registry = new HashMap();
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25 }
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27 protected LuanState(LuanState luan) {}
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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
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33 public abstract boolean hasJava();
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34 public abstract void setJava();
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35 public abstract LuanSource currentSource();
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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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41 public void onClose(Closeable c) {
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42 onClose.add(new WeakReference<Closeable>(c));
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43 }
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44
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45 public void close() throws IOException {
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46 for( Reference<Closeable> ref : onClose ) {
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47 Closeable c = ref.get();
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48 if( c != null )
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49 c.close();
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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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58 public final Object eval(String cmd) throws LuanException {
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59 return eval(cmd,new LuanTable());
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60 }
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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);
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65 }
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67 public final LuanBit bit(LuanElement el) {
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68 return new LuanBit(this,el);
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69 }
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71 // convenience methods
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72
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73 private final LuanBit JAVA = bit(null);
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75 public LuanException exception(Object msg) throws LuanException {
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76 return JAVA.exception(msg);
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77 }
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79 public Boolean checkBoolean(Object obj) throws LuanException {
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80 return JAVA.checkBoolean(obj);
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81 }
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82
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83 public String checkString(Object obj) throws LuanException {
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84 return JAVA.checkString(obj);
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85 }
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87 public LuanFunction checkFunction(Object obj) throws LuanException {
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88 return JAVA.checkFunction(obj);
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89 }
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90
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91 public boolean isLessThan(Object o1,Object o2) throws LuanException {
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92 return JAVA.isLessThan(o1,o2);
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93 }
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94
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95 public String toString(Object obj) throws LuanException {
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96 if( obj instanceof LuanTable ) {
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97 LuanTable tbl = (LuanTable)obj;
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98 return tbl.toString(this);
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99 }
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100 if( obj == null )
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101 return "nil";
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102 if( obj instanceof Number )
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103 return Luan.toString((Number)obj);
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104 if( obj instanceof byte[] )
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105 return "binary: " + Integer.toHexString(obj.hashCode());
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106 return obj.toString();
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107 }
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108
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109 public Object index(Object obj,Object key) throws LuanException {
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110 if( obj instanceof LuanTable ) {
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111 LuanTable tbl = (LuanTable)obj;
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112 return tbl.get(this,key);
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113 }
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114 if( obj != null && hasJava() )
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115 return JavaLuan.__index(this,obj,key,false);
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116 throw exception( "attempt to index a " + Luan.type(obj) + " value in '"+context()+"'" );
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117 }
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118
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119 public String context() {
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120 return stackTrace.get(stackTrace.size()-1).call.text();
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121 }
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122 }