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      1 /* Generated By:JavaCC: Do not edit this line. ParseException.java Version 6.1 */
      2 /* JavaCCOptions:KEEP_LINE_COLUMN=true */
      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   private static final String INDENT = "    ";
     36 
     37   /**
     38    * The end of line string (we do not use System.getProperty("") so that we are compatible with Android/GWT);
     39    */
     40   protected static String EOL = "\n";
     41 
     42 
     43   public ParseException(Token currentTokenVal,
     44           int[][] expectedTokenSequencesVal,
     45           String[] tokenImageVal
     46          )
     47 	{
     48 	  this (currentTokenVal, expectedTokenSequencesVal, tokenImageVal, null);
     49 	}
     50 
     51 
     52   /**
     53    * This constructor is used by the method "generateParseException"
     54    * in the generated parser.  Calling this constructor generates
     55    * a new object of this type with the fields "currentToken",
     56    * "expectedTokenSequences", and "tokenImage" set.
     57    */
     58   public ParseException(Token currentTokenVal,
     59                         int[][] expectedTokenSequencesVal,
     60                         String[] tokenImageVal,
     61                         String lexicalStateName
     62                        )
     63   {
     64     super(initialise(currentTokenVal, expectedTokenSequencesVal, tokenImageVal, lexicalStateName));
     65     currentToken = currentTokenVal;
     66     expectedTokenSequences = expectedTokenSequencesVal;
     67     tokenImage = tokenImageVal;
     68   }
     69 
     70   /**
     71    * The following constructors are for use by you for whatever
     72    * purpose you can think of.  Constructing the exception in this
     73    * manner makes the exception behave in the normal way - i.e., as
     74    * documented in the class "Throwable".  The fields "errorToken",
     75    * "expectedTokenSequences", and "tokenImage" do not contain
     76    * relevant information.  The JavaCC generated code does not use
     77    * these constructors.
     78    */
     79 
     80   public ParseException() {
     81     super();
     82   }
     83 
     84   /** Constructor with message. */
     85   public ParseException(String message) {
     86     super(message);
     87   }
     88 
     89 
     90   /**
     91    * This is the last token that has been consumed successfully.  If
     92    * this object has been created due to a parse error, the token
     93    * followng this token will (therefore) be the first error token.
     94    */
     95   public Token currentToken;
     96 
     97   /**
     98    * Each entry in this array is an array of integers.  Each array
     99    * of integers represents a sequence of tokens (by their ordinal
    100    * values) that is expected at this point of the parse.
    101    */
    102   public int[][] expectedTokenSequences;
    103 
    104   /**
    105    * This is a reference to the "tokenImage" array of the generated
    106    * parser within which the parse error occurred.  This array is
    107    * defined in the generated ...Constants interface.
    108    */
    109   public String[] tokenImage;
    110 
    111   /**
    112    * It uses "currentToken" and "expectedTokenSequences" to generate a parse
    113    * error message and returns it.  If this object has been created
    114    * due to a parse error, and you do not catch it (it gets thrown
    115    * from the parser) the correct error message
    116    * gets displayed.
    117    */
    118   private static String initialise(Token currentToken,
    119                            int[][] expectedTokenSequences,
    120                            String[] tokenImage,
    121                            String lexicalStateName) {
    122 	StringBuilder sb = new StringBuilder();
    123     StringBuffer expected = new StringBuffer();
    124 
    125     int maxSize = 0;
    126     java.util.TreeSet<String> sortedOptions = new java.util.TreeSet<String>();
    127     for (int i = 0; i < expectedTokenSequences.length; i++) {
    128       if (maxSize < expectedTokenSequences[i].length) {
    129         maxSize = expectedTokenSequences[i].length;
    130       }
    131       for (int j = 0; j < expectedTokenSequences[i].length; j++) {
    132     	  sortedOptions.add(tokenImage[expectedTokenSequences[i][j]]);
    133       }
    134     }
    135 
    136     for (String option : sortedOptions) {
    137         expected.append(INDENT).append(option).append(EOL);
    138       }
    139 
    140     sb.append("Encountered unexpected token:");
    141 
    142     Token tok = currentToken.next;
    143     for (int i = 0; i < maxSize; i++) {
    144       String tokenText = tok.image;
    145   	  String escapedTokenText = add_escapes(tokenText);
    146       if (i != 0) {
    147       	sb.append(" ");
    148       }
    149       if (tok.kind == 0) {
    150       	sb.append(tokenImage[0]);
    151         break;
    152       }
    153       sb.append(" \"");
    154 	  sb.append(escapedTokenText);
    155       sb.append("\"");
    156       sb.append(" " + tokenImage[tok.kind]);
    157       tok = tok.next;
    158     }
    159 	sb.append(EOL).append(INDENT).append("at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn);
    160 	sb.append(".").append(EOL);
    161 
    162     if (expectedTokenSequences.length == 0) {
    163         // Nothing to add here
    164     } else {
    165     	int numExpectedTokens = expectedTokenSequences.length;
    166     	sb.append(EOL).append("Was expecting"+ (numExpectedTokens == 1 ? ":" : " one of:") + EOL + EOL);
    167     	sb.append(expected.toString());
    168     }
    169     // 2013/07/30 --> Seems to be inaccurate as represents the readahead state, not the lexical state BEFORE the unknown token
    170 //    if (lexicalStateName != null) {
    171 //    	sb.append(EOL).append("** Lexical State : ").append(lexicalStateName).append(EOL).append(EOL);
    172 //    }
    173 
    174     return sb.toString();
    175   }
    176 
    177 
    178   /**
    179    * Used to convert raw characters to their escaped version
    180    * when these raw version cannot be used as part of an ASCII
    181    * string literal.
    182    */
    183   static String add_escapes(String str) {
    184       StringBuffer retval = new StringBuffer();
    185       char ch;
    186       for (int i = 0; i < str.length(); i++) {
    187         switch (str.charAt(i))
    188         {
    189            case '\b':
    190               retval.append("\\b");
    191               continue;
    192            case '\t':
    193               retval.append("\\t");
    194               continue;
    195            case '\n':
    196               retval.append("\\n");
    197               continue;
    198            case '\f':
    199               retval.append("\\f");
    200               continue;
    201            case '\r':
    202               retval.append("\\r");
    203               continue;
    204            case '\"':
    205               retval.append("\\\"");
    206               continue;
    207            case '\'':
    208               retval.append("\\\'");
    209               continue;
    210            case '\\':
    211               retval.append("\\\\");
    212               continue;
    213            default:
    214               if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
    215                  String s = "0000" + Integer.toString(ch, 16);
    216                  retval.append("\\u" + s.substring(s.length() - 4, s.length()));
    217               } else {
    218                  retval.append(ch);
    219               }
    220               continue;
    221         }
    222       }
    223       return retval.toString();
    224    }
    225 
    226 }
    227 /* JavaCC - OriginalChecksum=c0da6a86ac0d0ec8b633aeafa43e6e37 (do not edit this line) */
    228