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      1 /* Generated By:JavaCC: Do not edit this line. ParseException.java Version 5.0 */
      2 /* JavaCCOptions:KEEP_LINE_COL=null */
      3 /*
      4  *
      5  * This file is part of Java 1.8 parser and Abstract Syntax Tree.
      6  *
      7  * Java 1.8 parser and Abstract Syntax Tree is free software: you can redistribute it and/or modify
      8  * it under the terms of the GNU Lesser General Public License as published by
      9  * the Free Software Foundation, either version 3 of the License, or
     10  * (at your option) any later version.
     11  *
     12  * You should have received a copy of the GNU Lesser General Public License
     13  * along with Java 1.8 parser and Abstract Syntax Tree.  If not, see <http://www.gnu.org/licenses/>.
     14  */
     15 package com.github.javaparser;
     16 
     17 /**
     18  * This exception is thrown when parse errors are encountered.
     19  * You can explicitly create objects of this exception type by
     20  * calling the method generateParseException in the generated
     21  * parser.
     22  *
     23  * You can modify this class to customize your error reporting
     24  * mechanisms so long as you retain the public fields.
     25  */
     26 public class ParseException extends Exception {
     27 
     28   /**
     29    * The version identifier for this Serializable class.
     30    * Increment only if the <i>serialized</i> form of the
     31    * class changes.
     32    */
     33   private static final long serialVersionUID = 1L;
     34 
     35   /**
     36    * This constructor is used by the method "generateParseException"
     37    * in the generated parser.  Calling this constructor generates
     38    * a new object of this type with the fields "currentToken",
     39    * "expectedTokenSequences", and "tokenImage" set.
     40    */
     41   public ParseException(Token currentTokenVal,
     42                         int[][] expectedTokenSequencesVal,
     43                         String[] tokenImageVal
     44                        )
     45   {
     46     super(initialise(currentTokenVal, expectedTokenSequencesVal, tokenImageVal));
     47     currentToken = currentTokenVal;
     48     expectedTokenSequences = expectedTokenSequencesVal;
     49     tokenImage = tokenImageVal;
     50   }
     51 
     52   /**
     53    * The following constructors are for use by you for whatever
     54    * purpose you can think of.  Constructing the exception in this
     55    * manner makes the exception behave in the normal way - i.e., as
     56    * documented in the class "Throwable".  The fields "errorToken",
     57    * "expectedTokenSequences", and "tokenImage" do not contain
     58    * relevant information.  The JavaCC generated code does not use
     59    * these constructors.
     60    */
     61 
     62   public ParseException() {
     63     super();
     64   }
     65 
     66   /** Constructor with message. */
     67   public ParseException(String message) {
     68     super(message);
     69   }
     70 
     71 
     72   /**
     73    * This is the last token that has been consumed successfully.  If
     74    * this object has been created due to a parse error, the token
     75    * followng this token will (therefore) be the first error token.
     76    */
     77   public Token currentToken;
     78 
     79   /**
     80    * Each entry in this array is an array of integers.  Each array
     81    * of integers represents a sequence of tokens (by their ordinal
     82    * values) that is expected at this point of the parse.
     83    */
     84   public int[][] expectedTokenSequences;
     85 
     86   /**
     87    * This is a reference to the "tokenImage" array of the generated
     88    * parser within which the parse error occurred.  This array is
     89    * defined in the generated ...Constants interface.
     90    */
     91   public String[] tokenImage;
     92 
     93   /**
     94    * It uses "currentToken" and "expectedTokenSequences" to generate a parse
     95    * error message and returns it.  If this object has been created
     96    * due to a parse error, and you do not catch it (it gets thrown
     97    * from the parser) the correct error message
     98    * gets displayed.
     99    */
    100   private static String initialise(Token currentToken,
    101                            int[][] expectedTokenSequences,
    102                            String[] tokenImage) {
    103     String eol = System.getProperty("line.separator", "\n");
    104     StringBuffer expected = new StringBuffer();
    105     int maxSize = 0;
    106     for (int i = 0; i < expectedTokenSequences.length; i++) {
    107       if (maxSize < expectedTokenSequences[i].length) {
    108         maxSize = expectedTokenSequences[i].length;
    109       }
    110       for (int j = 0; j < expectedTokenSequences[i].length; j++) {
    111         expected.append(tokenImage[expectedTokenSequences[i][j]]).append(' ');
    112       }
    113       if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
    114         expected.append("...");
    115       }
    116       expected.append(eol).append("    ");
    117     }
    118     String retval = "Encountered \"";
    119     Token tok = currentToken.next;
    120     for (int i = 0; i < maxSize; i++) {
    121       if (i != 0) retval += " ";
    122       if (tok.kind == 0) {
    123         retval += tokenImage[0];
    124         break;
    125       }
    126       retval += " " + tokenImage[tok.kind];
    127       retval += " \"";
    128       retval += add_escapes(tok.image);
    129       retval += " \"";
    130       tok = tok.next;
    131     }
    132     retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn;
    133     retval += "." + eol;
    134     if (expectedTokenSequences.length == 1) {
    135       retval += "Was expecting:" + eol + "    ";
    136     } else {
    137       retval += "Was expecting one of:" + eol + "    ";
    138     }
    139     retval += expected.toString();
    140     return retval;
    141   }
    142 
    143   /**
    144    * The end of line string for this machine.
    145    */
    146   protected String eol = System.getProperty("line.separator", "\n");
    147 
    148   /**
    149    * Used to convert raw characters to their escaped version
    150    * when these raw version cannot be used as part of an ASCII
    151    * string literal.
    152    */
    153   static String add_escapes(String str) {
    154       StringBuffer retval = new StringBuffer();
    155       char ch;
    156       for (int i = 0; i < str.length(); i++) {
    157         switch (str.charAt(i))
    158         {
    159            case 0 :
    160               continue;
    161            case '\b':
    162               retval.append("\\b");
    163               continue;
    164            case '\t':
    165               retval.append("\\t");
    166               continue;
    167            case '\n':
    168               retval.append("\\n");
    169               continue;
    170            case '\f':
    171               retval.append("\\f");
    172               continue;
    173            case '\r':
    174               retval.append("\\r");
    175               continue;
    176            case '\"':
    177               retval.append("\\\"");
    178               continue;
    179            case '\'':
    180               retval.append("\\\'");
    181               continue;
    182            case '\\':
    183               retval.append("\\\\");
    184               continue;
    185            default:
    186               if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
    187                  String s = "0000" + Integer.toString(ch, 16);
    188                  retval.append("\\u" + s.substring(s.length() - 4, s.length()));
    189               } else {
    190                  retval.append(ch);
    191               }
    192               continue;
    193         }
    194       }
    195       return retval.toString();
    196    }
    197 
    198 }
    199 /* JavaCC - OriginalChecksum=62ba72b2159703420d5ce7232a0226fb (do not edit this line) */
    200