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annotate core/src/luan/LuanException.java @ 646:cdc70de628b5

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simplify LuanException
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 29 Mar 2016 19:58:39 -0600
parents 859c0dedc8b6
children 0c334975d526
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1 package luan;
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3 import java.io.StringWriter;
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4 import java.io.PrintWriter;
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7 public final class LuanException extends Exception implements DeepCloneable {
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8 private LuanTable table = new LuanTable();
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10 public LuanException(String msg,Throwable cause) {
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11 super(msg,cause);
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12 setTable();
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13 }
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15 public LuanException(String msg) {
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16 super(msg);
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17 setTable();
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18 }
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20 public LuanException(Throwable cause) {
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21 super(cause);
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22 setTable();
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23 }
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25 private void setTable() {
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26 table.rawPut( "java", this );
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27 /*
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28 for( StackTraceElement ste : luan.stackTrace ) {
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29 LuanTable tbl = new LuanTable();
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30 tbl.rawPut( "source", ste.call.source.name );
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31 tbl.rawPut( "line", ste.call.lineNumber() );
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32 tbl.rawPut( "call_to", ste.fnName );
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33 table.rawPut( table.rawLength() + 1, tbl );
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34 }
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35 */
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36 LuanTable metatable = new LuanTable();
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37 table.setMetatable(metatable);
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38 try {
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39 table.rawPut( "get_message", new LuanJavaFunction(
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40 LuanException.class.getMethod( "getMessage" ), this
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41 ) );
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42 table.rawPut( "throw", new LuanJavaFunction(
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43 LuanException.class.getMethod( "throwThis" ), this
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44 ) );
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45 metatable.rawPut( "__to_string", new LuanJavaFunction(
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46 LuanException.class.getMethod( "__to_string", LuanTable.class ), null
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47 ) );
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48 } catch(NoSuchMethodException e) {
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49 throw new RuntimeException(e);
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50 }
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2df768b926aa start Luan
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53 @Override public LuanException shallowClone() {
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54 return new LuanException(getMessage(),getCause());
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55 }
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56
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57 @Override public void deepenClone(DeepCloneable dc,DeepCloner cloner) {
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58 LuanException clone = (LuanException)dc;
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59 clone.table = (LuanTable)cloner.get(table);
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60 }
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61
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62 public LuanTable table() {
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63 return table;
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64 }
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65
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66 public void throwThis() throws LuanException {
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67 throw this;
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68 }
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69
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70 public String getFullMessage() {
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71 return __to_string(table);
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72 }
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73
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74 public static String __to_string(LuanTable table) {
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75 /*
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76 StringBuilder buf = new StringBuilder();
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78 Object msg = table.rawGet("message");
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79 String msgStr = (String)table.rawGet("message_string");
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80 buf.append( msgStr );
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81
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82 for( int i = table.rawLength(); i>=1; i-- ) {
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83 LuanTable tbl = (LuanTable)table.rawGet(i);
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84 buf.append( "\n\t" ).append( tbl.rawGet("source") ).append( " line " ).append( tbl.rawGet("line") );
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85 Object callTo = tbl.rawGet("call_to");
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86 if( callTo != null )
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87 buf.append( " in call to '" ).append( callTo ).append( "'" );
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88 }
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89
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90 if( msg instanceof Throwable ) {
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91 buf.append( "\nCaused by: " );
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92 Throwable cause = (Throwable)msg;
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93 StringWriter sw = new StringWriter();
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94 cause.printStackTrace(new PrintWriter(sw));
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95 buf.append( sw );
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96 }
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97
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98 return buf.toString();
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99 */
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100 LuanException ex = (LuanException)table.rawGet("java");
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101 StringWriter sw = new StringWriter();
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102 ex.printStackTrace(new PrintWriter(sw));
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103 return sw.toString();
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104 }
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106 }