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annotate src/luan/LuanException.java @ 1561:e1a13e707bf3

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start immutable
author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 05 Nov 2020 20:24:09 -0700
parents 221eedb0f54e
children b89212fd04b5
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rev   line source
1
2df768b926aa start Luan
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1 package luan;
2df768b926aa start Luan
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2
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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.io.PrintStream;
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6 import java.util.List;
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7 import java.util.ArrayList;
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8 import java.util.Map;
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9 import java.util.HashMap;
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2df768b926aa start Luan
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11
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12 public final class LuanException extends Exception implements LuanCloneable {
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13 private LuanTable table;
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14 private Map extra = new HashMap();
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2df768b926aa start Luan
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15
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16 public LuanException(String msg,Throwable cause) {
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17 super(msg,cause);
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18 }
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19
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20 public LuanException(String msg) {
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21 super(msg);
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22 }
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23
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24 public LuanException(Throwable cause) {
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25 super(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());
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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 clone.extra = (Map)cloner.clone(extra);
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36 }
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37
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38 @Override public void makeImmutable(LuanImmutabler immutabler) throws LuanException {
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39 immutabler.makeImmutable(table);
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40 immutabler.makeImmutable(extra);
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41 }
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42
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43 public void put(String key,Object value) throws LuanException {
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44 if( table == null ) {
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45 extra.put(key,value);
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46 } else {
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47 table.put(key,value);
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48 }
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49 }
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50
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51 public LuanTable table(Luan luan) {
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52 if( table==null ) {
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53 try {
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54 LuanTable Boot = (LuanTable)luan.require("luan:Boot.luan");
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55 table = (LuanTable)Boot.fn("new_error_table").call(this );
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56 for( Object stupid : extra.entrySet() ) {
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57 Map.Entry entry = (Map.Entry)stupid;
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58 table.put( entry.getKey(), entry.getValue() );
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59 }
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60 } catch(LuanException e) {
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61 throw new RuntimeException(e);
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62 }
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63 }
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64 return table;
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65 }
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66
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67 public void throwThis() throws LuanException {
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68 throw this;
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69 }
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70
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71 public String getJavaStackTraceString() {
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72 return getJavaStackTraceString(this);
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73 }
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74
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75 private static String getJavaStackTraceString(Throwable th) {
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76 StringWriter sw = new StringWriter();
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77 th.printStackTrace(new PrintWriter(sw));
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78 return sw.toString();
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79 }
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80
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81 public static List<StackTraceElement> justLuan(StackTraceElement[] orig) {
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82 List<StackTraceElement> list = new ArrayList<StackTraceElement>();
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83 for( int i=0; i<orig.length; i++ ) {
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84 StackTraceElement ste = orig[i];
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85 if( !ste.getClassName().startsWith("luan.impl.EXP") )
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86 continue;
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87 list.add(ste);
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88 if( !ste.getMethodName().equals("doCall") )
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89 i++;
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90 }
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91 return list;
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92 }
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93
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94 public static String toLuanString(StackTraceElement ste) {
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95 int line = ste.getLineNumber();
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96 String method = ste.getMethodName();
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97 boolean hasMethod = !method.equals("doCall");
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98 if( hasMethod ) {
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99 int i = method.indexOf('$');
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100 if( i != -1 ) {
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101 int n = Integer.parseInt(method.substring(i+1));
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102 line -= n;
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103 method = method.substring(0,i);
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104 if( method.equals("_") )
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105 hasMethod = false;
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106 }
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107 }
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108 StringBuilder sb = new StringBuilder();
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109 sb.append( ste.getFileName() ).append( " line " ).append( line );
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110 if( hasMethod )
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111 sb.append( " in function '" ).append( method.substring(1) ).append( "'" );
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112 return sb.toString();
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113 }
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114
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115 private StringBuilder luanStackTrace() {
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116 StringBuilder sb = new StringBuilder();
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117 sb.append( getMessage() );
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118 for( StackTraceElement ste : justLuan(getStackTrace()) ) {
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119 sb.append( "\n\t" ).append( toLuanString(ste) );
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120 }
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121 return sb;
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122 }
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123
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124 public String getLuanStackTraceString() {
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125 StringBuilder sb = luanStackTrace();
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126 Throwable cause = getCause();
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127 if( cause != null )
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128 sb.append( "\nCaused by: " ).append( getJavaStackTraceString(cause) );
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129 return sb.toString();
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130 }
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131
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132 @Override public void printStackTrace(PrintStream s) {
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133 s.print("Luan: ");
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134 s.println(luanStackTrace());
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135 s.print("Caused by: ");
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136 super.printStackTrace(s);
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137 }
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138
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139 @Override public void printStackTrace(PrintWriter s) {
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140 s.print("Luan: ");
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141 s.println(luanStackTrace());
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142 s.print("Caused by: ");
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143 super.printStackTrace(s);
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144 }
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145
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2df768b926aa start Luan
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146 }