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annotate src/luan/LuanException.java @ 1122:e15be31cee92

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remove LuanException.getFullMessage()
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 14 Aug 2017 17:00:37 -0600
parents 4cf541886663
children 442abdfff437
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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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5 import java.util.List;
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6 import java.util.ArrayList;
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2df768b926aa start Luan
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8
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9 public final class LuanException extends Exception implements LuanCloneable {
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10 private LuanTable table;
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11
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12 public LuanException(String msg,Throwable cause) {
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13 super(msg,cause);
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14 }
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16 public LuanException(String msg) {
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17 super(msg);
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18 }
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19
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20 public LuanException(Throwable cause) {
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21 super(cause);
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22 }
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23
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24 private LuanException(String msg,Throwable cause,int nonsense) {
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25 super(msg,cause);
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26 }
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27
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28 @Override public LuanException shallowClone() {
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29 return new LuanException(getMessage(),getCause(),99);
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30 }
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31
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32 @Override public void deepenClone(LuanCloneable dc,LuanCloner cloner) {
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33 LuanException clone = (LuanException)dc;
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34 clone.table = (LuanTable)cloner.clone(table);
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35 }
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36
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37 public LuanTable table() {
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38 if( table==null ) {
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39 table = new LuanTable();
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40 table.rawPut( "java", this );
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41 LuanTable metatable = new LuanTable();
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42 table.setMetatable(metatable);
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43 try {
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44 table.rawPut( "get_message", new LuanJavaFunction(
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45 LuanException.class.getMethod( "getMessage" ), this
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46 ) );
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47 table.rawPut( "throw", new LuanJavaFunction(
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48 LuanException.class.getMethod( "throwThis" ), this
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49 ) );
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50 table.rawPut( "get_stack_trace_string", new LuanJavaFunction(
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51 LuanException.class.getMethod( "getLuanStackTraceString" ), this
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52 ) );
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53 table.rawPut( "get_java_stack_trace_string", new LuanJavaFunction(
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54 LuanException.class.getMethod( "getJavaStackTraceString" ), this
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55 ) );
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56 metatable.rawPut( "__to_string", new LuanJavaFunction(
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57 LuanException.class.getMethod( "__to_string", LuanTable.class ), this
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58 ) );
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59 } catch(NoSuchMethodException e) {
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60 throw new RuntimeException(e);
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61 }
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62 }
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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 __to_string(LuanTable ignore) {
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71 return getLuanStackTraceString();
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72 }
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73
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74 public String getJavaStackTraceString() {
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75 return getJavaStackTraceString(this);
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76 }
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77
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78 private static String getJavaStackTraceString(Throwable th) {
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79 StringWriter sw = new StringWriter();
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80 th.printStackTrace(new PrintWriter(sw));
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81 return sw.toString();
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82 }
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83
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84 public static List<StackTraceElement> justLuan(StackTraceElement[] orig) {
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85 List<StackTraceElement> list = new ArrayList<StackTraceElement>();
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86 for( int i=0; i<orig.length; i++ ) {
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87 StackTraceElement ste = orig[i];
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88 if( !ste.getClassName().startsWith("luan.impl.EXP") )
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89 continue;
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90 list.add(ste);
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91 if( !ste.getMethodName().equals("doCall") )
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92 i++;
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93 }
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94 return list;
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95 }
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96
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97 public static String toString(StackTraceElement ste) {
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98 StringBuilder sb = new StringBuilder();
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99 sb.append( ste.getFileName() ).append( " line " ).append( ste.getLineNumber() );
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100 String method = ste.getMethodName();
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101 if( !method.equals("doCall") )
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102 sb.append( " in function '" ).append( method.substring(1) ).append( "'" );
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103 return sb.toString();
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104 }
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105
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106 public String getLuanStackTraceString() {
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107 StringBuilder sb = new StringBuilder();
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108 sb.append( getMessage() );
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109 for( StackTraceElement ste : justLuan(getStackTrace()) ) {
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110 sb.append( "\n\t" ).append( toString(ste) );
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111 }
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112 Throwable cause = getCause();
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113 if( cause != null )
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114 sb.append( "\nCaused by: " ).append( getJavaStackTraceString(cause) );
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115 return sb.toString();
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116 }
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117
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118 public static String currentSource() {
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119 LuanException ex = new LuanException("currentSource");
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120 List<StackTraceElement> st = ex.justLuan(ex.getStackTrace());
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121 return st.isEmpty() ? null : st.get(0).getFileName();
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122 }
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124 }