java/pig-galago/src/com/yahoo/pig/impl/logicalLayer/parser/TokenMgrError.java

   1 /* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 3.0 */
   2 package com.yahoo.pig.impl.logicalLayer.parser;
   3
   4 public class TokenMgrError extends Error
   5 {
   6    /*
   7     * Ordinals for various reasons why an Error of this type can be thrown.
   8     */
   9
  10    /**
  11     * Lexical error occured.
  12     */
  13    static final int LEXICAL_ERROR = 0;
  14
  15    /**
  16     * An attempt wass made to create a second instance of a static token manager.
  17     */
  18    static final int STATIC_LEXER_ERROR = 1;
  19
  20    /**
  21     * Tried to change to an invalid lexical state.
  22     */
  23    static final int INVALID_LEXICAL_STATE = 2;
  24
  25    /**
  26     * Detected (and bailed out of) an infinite loop in the token manager.
  27     */
  28    static final int LOOP_DETECTED = 3;
  29
  30    /**
  31     * Indicates the reason why the exception is thrown. It will have
  32     * one of the above 4 values.
  33     */
  34    int errorCode;
  35
  36    /**
  37     * Replaces unprintable characters by their espaced (or unicode escaped)
  38     * equivalents in the given string
  39     */
  40    protected static final String addEscapes(String str) {
  41       StringBuffer retval = new StringBuffer();
  42       char ch;
  43       for (int i = 0; i < str.length(); i++) {
  44         switch (str.charAt(i))
  45         {
  46            case 0 :
  47               continue;
  48            case '\b':
  49               retval.append("\\b");
  50               continue;
  51            case '\t':
  52               retval.append("\\t");
  53               continue;
  54            case '\n':
  55               retval.append("\\n");
  56               continue;
  57            case '\f':
  58               retval.append("\\f");
  59               continue;
  60            case '\r':
  61               retval.append("\\r");
  62               continue;
  63            case '\"':
  64               retval.append("\\\"");
  65               continue;
  66            case '\'':
  67               retval.append("\\\'");
  68               continue;
  69            case '\\':
  70               retval.append("\\\\");
  71               continue;
  72            default:
  73               if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
  74                  String s = "0000" + Integer.toString(ch, 16);
  75                  retval.append("\\u" + s.substring(s.length() - 4, s.length()));
  76               } else {
  77                  retval.append(ch);
  78               }
  79               continue;
  80         }
  81       }
  82       return retval.toString();
  83    }
  84
  85    /**
  86     * Returns a detailed message for the Error when it is thrown by the
  87     * token manager to indicate a lexical error.
  88     * Parameters :
  89     *    EOFSeen     : indicates if EOF caused the lexicl error
  90     *    curLexState : lexical state in which this error occured
  91     *    errorLine   : line number when the error occured
  92     *    errorColumn : column number when the error occured
  93     *    errorAfter  : prefix that was seen before this error occured
  94     *    curchar     : the offending character
  95     * Note: You can customize the lexical error message by modifying this method.
  96     */
  97    protected static String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) {
  98       return("Lexical error at line " +
  99            errorLine + ", column " +
 100            errorColumn + ".  Encountered: " +
 101            (EOFSeen ? "<EOF> " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int)curChar + "), ") +
 102            "after : \"" + addEscapes(errorAfter) + "\"");
 103    }
 104
 105    /**
 106     * You can also modify the body of this method to customize your error messages.
 107     * For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not
 108     * of end-users concern, so you can return something like :
 109     *
 110     *     "Internal Error : Please file a bug report .... "
 111     *
 112     * from this method for such cases in the release version of your parser.
 113     */
 114    public String getMessage() {
 115       return super.getMessage();
 116    }
 117
 118    /*
 119     * Constructors of various flavors follow.
 120     */
 121
 122    public TokenMgrError() {
 123    }
 124
 125    public TokenMgrError(String message, int reason) {
 126       super(message);
 127       errorCode = reason;
 128    }
 129
 130    public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) {
 131       this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
 132    }
 133 }