001/* Generated By:JavaCC: Do not edit this line. ParseException.java Version 4.1 */
002/* JavaCCOptions:KEEP_LINE_COL=null */
003package com.randomnoun.common.jexl.parser;
004
005/**
006 * This exception is thrown when parse errors are encountered.
007 * You can explicitly create objects of this exception type by
008 * calling the method generateParseException in the generated
009 * parser.
010 *
011 * You can modify this class to customize your error reporting
012 * mechanisms so long as you retain the public fields.
013 */
014public class ParseException extends Exception {
015
016  /**
017   * This constructor is used by the method "generateParseException"
018   * in the generated parser.  Calling this constructor generates
019   * a new object of this type with the fields "currentToken",
020   * "expectedTokenSequences", and "tokenImage" set.  The boolean
021   * flag "specialConstructor" is also set to true to indicate that
022   * this constructor was used to create this object.
023   * This constructor calls its super class with the empty string
024   * to force the "toString" method of parent class "Throwable" to
025   * print the error message in the form:
026   *     ParseException: <result of getMessage>
027   */
028  public ParseException(Token currentTokenVal,
029                        int[][] expectedTokenSequencesVal,
030                        String[] tokenImageVal
031                       )
032  {
033    super("");
034    specialConstructor = true;
035    currentToken = currentTokenVal;
036    expectedTokenSequences = expectedTokenSequencesVal;
037    tokenImage = tokenImageVal;
038  }
039
040  /**
041   * The following constructors are for use by you for whatever
042   * purpose you can think of.  Constructing the exception in this
043   * manner makes the exception behave in the normal way - i.e., as
044   * documented in the class "Throwable".  The fields "errorToken",
045   * "expectedTokenSequences", and "tokenImage" do not contain
046   * relevant information.  The JavaCC generated code does not use
047   * these constructors.
048   */
049
050  public ParseException() {
051    super();
052    specialConstructor = false;
053  }
054
055  /** Constructor with message. */
056  public ParseException(String message) {
057    super(message);
058    specialConstructor = false;
059  }
060
061  /**
062   * This variable determines which constructor was used to create
063   * this object and thereby affects the semantics of the
064   * "getMessage" method (see below).
065   */
066  protected boolean specialConstructor;
067
068  /**
069   * This is the last token that has been consumed successfully.  If
070   * this object has been created due to a parse error, the token
071   * followng this token will (therefore) be the first error token.
072   */
073  public Token currentToken;
074
075  /**
076   * Each entry in this array is an array of integers.  Each array
077   * of integers represents a sequence of tokens (by their ordinal
078   * values) that is expected at this point of the parse.
079   */
080  public int[][] expectedTokenSequences;
081
082  /**
083   * This is a reference to the "tokenImage" array of the generated
084   * parser within which the parse error occurred.  This array is
085   * defined in the generated ...Constants interface.
086   */
087  public String[] tokenImage;
088
089  /**
090   * This method has the standard behavior when this object has been
091   * created using the standard constructors.  Otherwise, it uses
092   * "currentToken" and "expectedTokenSequences" to generate a parse
093   * error message and returns it.  If this object has been created
094   * due to a parse error, and you do not catch it (it gets thrown
095   * from the parser), then this method is called during the printing
096   * of the final stack trace, and hence the correct error message
097   * gets displayed.
098   */
099  public String getMessage() {
100    if (!specialConstructor) {
101      return super.getMessage();
102    }
103    StringBuffer expected = new StringBuffer();
104    int maxSize = 0;
105    for (int i = 0; i < expectedTokenSequences.length; i++) {
106      if (maxSize < expectedTokenSequences[i].length) {
107        maxSize = expectedTokenSequences[i].length;
108      }
109      for (int j = 0; j < expectedTokenSequences[i].length; j++) {
110        expected.append(tokenImage[expectedTokenSequences[i][j]]).append(' ');
111      }
112      if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
113        expected.append("...");
114      }
115      expected.append(eol).append("    ");
116    }
117    String retval = "Encountered \"";
118    Token tok = currentToken.next;
119    for (int i = 0; i < maxSize; i++) {
120      if (i != 0) retval += " ";
121      if (tok.kind == 0) {
122        retval += tokenImage[0];
123        break;
124      }
125      retval += " " + tokenImage[tok.kind];
126      retval += " \"";
127      retval += add_escapes(tok.image);
128      retval += " \"";
129      tok = tok.next;
130    }
131    retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn;
132    retval += "." + eol;
133    if (expectedTokenSequences.length == 1) {
134      retval += "Was expecting:" + eol + "    ";
135    } else {
136      retval += "Was expecting one of:" + eol + "    ";
137    }
138    retval += expected.toString();
139    return retval;
140  }
141
142  /**
143   * The end of line string for this machine.
144   */
145  protected String eol = System.getProperty("line.separator", "\n");
146
147  /**
148   * Used to convert raw characters to their escaped version
149   * when these raw version cannot be used as part of an ASCII
150   * string literal.
151   */
152  protected String add_escapes(String str) {
153      StringBuffer retval = new StringBuffer();
154      char ch;
155      for (int i = 0; i < str.length(); i++) {
156        switch (str.charAt(i))
157        {
158           case 0 :
159              continue;
160           case '\b':
161              retval.append("\\b");
162              continue;
163           case '\t':
164              retval.append("\\t");
165              continue;
166           case '\n':
167              retval.append("\\n");
168              continue;
169           case '\f':
170              retval.append("\\f");
171              continue;
172           case '\r':
173              retval.append("\\r");
174              continue;
175           case '\"':
176              retval.append("\\\"");
177              continue;
178           case '\'':
179              retval.append("\\\'");
180              continue;
181           case '\\':
182              retval.append("\\\\");
183              continue;
184           default:
185              if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
186                 String s = "0000" + Integer.toString(ch, 16);
187                 retval.append("\\u" + s.substring(s.length() - 4, s.length()));
188              } else {
189                 retval.append(ch);
190              }
191              continue;
192        }
193      }
194      return retval.toString();
195   }
196
197}
198/* JavaCC - OriginalChecksum=0a45e118be11a607f8b25e28c6801cd3 (do not edit this line) */