Mercurial Hosting > luan
annotate src/luan/LuanException.java @ 1282:2531942abaf3
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author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Thu, 20 Dec 2018 17:44:34 -0700 |
parents | 9fa8b8389578 |
children | 503bde9a7c80 |
rev | line source |
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1 package 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; |
682 | 6 import java.util.List; |
7 import java.util.ArrayList; | |
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8 |
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9 |
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10 public final class LuanException extends Exception implements LuanCloneable { |
689 | 11 private LuanTable table; |
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12 |
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13 public LuanException(String msg,Throwable cause) { |
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14 super(msg,cause); |
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15 } |
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16 |
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17 public LuanException(String msg) { |
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18 super(msg); |
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19 } |
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20 |
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21 public LuanException(Throwable cause) { |
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22 super(cause); |
689 | 23 } |
24 | |
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25 @Override public LuanException shallowClone() { |
1282 | 26 return new LuanException(getMessage(),getCause()); |
689 | 27 } |
28 | |
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29 @Override public void deepenClone(LuanCloneable dc,LuanCloner cloner) { |
689 | 30 LuanException clone = (LuanException)dc; |
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31 clone.table = (LuanTable)cloner.clone(table); |
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32 } |
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33 |
1267 | 34 public LuanTable table(LuanState luan) { |
783 | 35 if( table==null ) { |
1267 | 36 table = new LuanTable(luan); |
783 | 37 table.rawPut( "java", this ); |
1267 | 38 LuanTable metatable = new LuanTable(luan); |
783 | 39 table.setMetatable(metatable); |
40 try { | |
41 table.rawPut( "get_message", new LuanJavaFunction( | |
42 LuanException.class.getMethod( "getMessage" ), this | |
43 ) ); | |
44 table.rawPut( "throw", new LuanJavaFunction( | |
45 LuanException.class.getMethod( "throwThis" ), this | |
46 ) ); | |
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47 table.rawPut( "get_stack_trace_string", new LuanJavaFunction( |
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48 LuanException.class.getMethod( "getLuanStackTraceString" ), this |
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49 ) ); |
783 | 50 table.rawPut( "get_java_stack_trace_string", new LuanJavaFunction( |
51 LuanException.class.getMethod( "getJavaStackTraceString" ), this | |
52 ) ); | |
53 metatable.rawPut( "__to_string", new LuanJavaFunction( | |
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54 LuanException.class.getMethod( "__to_string", LuanTable.class ), this |
783 | 55 ) ); |
56 } catch(NoSuchMethodException e) { | |
57 throw new RuntimeException(e); | |
58 } | |
59 } | |
689 | 60 return table; |
61 } | |
62 | |
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63 public void throwThis() throws LuanException { |
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64 throw this; |
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65 } |
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66 |
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67 public String __to_string(LuanTable ignore) { |
682 | 68 return getLuanStackTraceString(); |
69 } | |
70 | |
71 public String getJavaStackTraceString() { | |
72 return getJavaStackTraceString(this); | |
73 } | |
74 | |
75 private static String getJavaStackTraceString(Throwable th) { | |
645 | 76 StringWriter sw = new StringWriter(); |
682 | 77 th.printStackTrace(new PrintWriter(sw)); |
645 | 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) { |
682 | 82 List<StackTraceElement> list = new ArrayList<StackTraceElement>(); |
83 for( int i=0; i<orig.length; i++ ) { | |
84 StackTraceElement ste = orig[i]; | |
85 if( !ste.getClassName().startsWith("luan.impl.EXP") ) | |
86 continue; | |
87 list.add(ste); | |
88 if( !ste.getMethodName().equals("doCall") ) | |
89 i++; | |
90 } | |
91 return list; | |
92 } | |
93 | |
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94 public static String toString(StackTraceElement ste) { |
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95 StringBuilder sb = new StringBuilder(); |
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96 sb.append( ste.getFileName() ).append( " line " ).append( ste.getLineNumber() ); |
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97 String method = ste.getMethodName(); |
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98 if( !method.equals("doCall") ) |
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99 sb.append( " in function '" ).append( method.substring(1) ).append( "'" ); |
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100 return sb.toString(); |
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101 } |
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102 |
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103 private StringBuilder luanStackTrace() { |
682 | 104 StringBuilder sb = new StringBuilder(); |
105 sb.append( getMessage() ); | |
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106 for( StackTraceElement ste : justLuan(getStackTrace()) ) { |
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107 sb.append( "\n\t" ).append( toString(ste) ); |
682 | 108 } |
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109 return sb; |
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110 } |
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111 |
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112 public String getLuanStackTraceString() { |
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113 StringBuilder sb = luanStackTrace(); |
682 | 114 Throwable cause = getCause(); |
115 if( cause != null ) | |
116 sb.append( "\nCaused by: " ).append( getJavaStackTraceString(cause) ); | |
117 return sb.toString(); | |
118 } | |
119 | |
683 | 120 public static String currentSource() { |
121 LuanException ex = new LuanException("currentSource"); | |
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122 List<StackTraceElement> st = ex.justLuan(ex.getStackTrace()); |
683 | 123 return st.isEmpty() ? null : st.get(0).getFileName(); |
124 } | |
125 | |
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126 @Override public void printStackTrace(PrintStream s) { |
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127 s.print("Luan: "); |
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128 s.println(luanStackTrace()); |
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129 s.print("Caused by: "); |
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130 super.printStackTrace(s); |
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131 } |
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132 |
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133 @Override public void printStackTrace(PrintWriter s) { |
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134 s.print("Luan: "); |
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135 s.println(luanStackTrace()); |
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136 s.print("Caused by: "); |
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137 super.printStackTrace(s); |
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138 } |
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139 |
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140 } |