Mercurial Hosting > luan
view src/luan/LuanException.java @ 1520:d9a5405a3102
try statement
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sun, 21 Jun 2020 18:14:13 -0600 |
parents | 221eedb0f54e |
children | e1a13e707bf3 |
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package luan; import java.io.StringWriter; import java.io.PrintWriter; import java.io.PrintStream; import java.util.List; import java.util.ArrayList; import java.util.Map; import java.util.HashMap; public final class LuanException extends Exception implements LuanCloneable { private LuanTable table; private Map extra = new HashMap(); public LuanException(String msg,Throwable cause) { super(msg,cause); } public LuanException(String msg) { super(msg); } public LuanException(Throwable cause) { super(cause); } @Override public LuanException shallowClone() { return new LuanException(getMessage(),getCause()); } @Override public void deepenClone(LuanCloneable dc,LuanCloner cloner) { LuanException clone = (LuanException)dc; clone.table = (LuanTable)cloner.clone(table); clone.extra = (Map)cloner.clone(extra); } public void put(String key,Object value) throws LuanException { if( table == null ) { extra.put(key,value); } else { table.put(key,value); } } public LuanTable table(Luan luan) { if( table==null ) { try { LuanTable Boot = (LuanTable)luan.require("luan:Boot.luan"); table = (LuanTable)Boot.fn("new_error_table").call(this ); for( Object stupid : extra.entrySet() ) { Map.Entry entry = (Map.Entry)stupid; table.put( entry.getKey(), entry.getValue() ); } } catch(LuanException e) { throw new RuntimeException(e); } } return table; } public void throwThis() throws LuanException { throw this; } public String getJavaStackTraceString() { return getJavaStackTraceString(this); } private static String getJavaStackTraceString(Throwable th) { StringWriter sw = new StringWriter(); th.printStackTrace(new PrintWriter(sw)); return sw.toString(); } public static List<StackTraceElement> justLuan(StackTraceElement[] orig) { List<StackTraceElement> list = new ArrayList<StackTraceElement>(); for( int i=0; i<orig.length; i++ ) { StackTraceElement ste = orig[i]; if( !ste.getClassName().startsWith("luan.impl.EXP") ) continue; list.add(ste); if( !ste.getMethodName().equals("doCall") ) i++; } return list; } public static String toLuanString(StackTraceElement ste) { int line = ste.getLineNumber(); String method = ste.getMethodName(); boolean hasMethod = !method.equals("doCall"); if( hasMethod ) { int i = method.indexOf('$'); if( i != -1 ) { int n = Integer.parseInt(method.substring(i+1)); line -= n; method = method.substring(0,i); if( method.equals("_") ) hasMethod = false; } } StringBuilder sb = new StringBuilder(); sb.append( ste.getFileName() ).append( " line " ).append( line ); if( hasMethod ) sb.append( " in function '" ).append( method.substring(1) ).append( "'" ); return sb.toString(); } private StringBuilder luanStackTrace() { StringBuilder sb = new StringBuilder(); sb.append( getMessage() ); for( StackTraceElement ste : justLuan(getStackTrace()) ) { sb.append( "\n\t" ).append( toLuanString(ste) ); } return sb; } public String getLuanStackTraceString() { StringBuilder sb = luanStackTrace(); Throwable cause = getCause(); if( cause != null ) sb.append( "\nCaused by: " ).append( getJavaStackTraceString(cause) ); return sb.toString(); } @Override public void printStackTrace(PrintStream s) { s.print("Luan: "); s.println(luanStackTrace()); s.print("Caused by: "); super.printStackTrace(s); } @Override public void printStackTrace(PrintWriter s) { s.print("Luan: "); s.println(luanStackTrace()); s.print("Caused by: "); super.printStackTrace(s); } }