001/* Generated By:JavaCC: Do not edit this line. ParseException.java Version 7.0 */
002/* JavaCCOptions:KEEP_LINE_COLUMN=true */
003package jmri.jmris.srcp.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   * The version identifier for this Serializable class.
018   * Increment only if the <i>serialized</i> form of the
019   * class changes.
020   */
021  private static final long serialVersionUID = 1L;
022
023  /*
024   * The end of line string for this machine.
025   */
026  protected static String EOL = System.getProperty("line.separator", "\n");
027
028  /*
029   * This constructor is used by the method "generateParseException"
030   * in the generated parser.  Calling this constructor generates
031   * a new object of this type with the fields "currentToken",
032   * "expectedTokenSequences", and "tokenImage" set.
033   */
034  public ParseException(Token currentTokenVal,
035                        int[][] expectedTokenSequencesVal,
036                        String[] tokenImageVal
037                       )
038  {
039    super(initialise(currentTokenVal, expectedTokenSequencesVal, tokenImageVal));
040    currentToken = currentTokenVal;
041    expectedTokenSequences = expectedTokenSequencesVal;
042    tokenImage = tokenImageVal;
043  }
044
045  /*
046   * The following constructors are for use by you for whatever
047   * purpose you can think of.  Constructing the exception in this
048   * manner makes the exception behave in the normal way - i.e., as
049   * documented in the class "Throwable".  The fields "errorToken",
050   * "expectedTokenSequences", and "tokenImage" do not contain
051   * relevant information.  The JavaCC generated code does not use
052   * these constructors.
053   */
054
055  public ParseException() {
056    super();
057  }
058
059  /* Constructor with message. */
060  public ParseException(String message) {
061    super(message);
062  }
063
064
065  /*
066   * This is the last token that has been consumed successfully.  If
067   * this object has been created due to a parse error, the token
068   * followng this token will (therefore) be the first error token.
069   */
070  public Token currentToken;
071
072  /*
073   * Each entry in this array is an array of integers.  Each array
074   * of integers represents a sequence of tokens (by their ordinal
075   * values) that is expected at this point of the parse.
076   */
077  public int[][] expectedTokenSequences;
078
079  /*
080   * This is a reference to the "tokenImage" array of the generated
081   * parser within which the parse error occurred.  This array is
082   * defined in the generated ...Constants interface.
083   */
084  public String[] tokenImage;
085
086  /*
087   * It uses "currentToken" and "expectedTokenSequences" to generate a parse
088   * error message and returns it.  If this object has been created
089   * due to a parse error, and you do not catch it (it gets thrown
090   * from the parser) the correct error message
091   * gets displayed.
092   */
093  private static String initialise(Token currentToken,
094                           int[][] expectedTokenSequences,
095                           String[] tokenImage) {
096
097    StringBuffer expected = new StringBuffer();
098    int maxSize = 0;
099    for (int i = 0; i < expectedTokenSequences.length; i++) {
100      if (maxSize < expectedTokenSequences[i].length) {
101        maxSize = expectedTokenSequences[i].length;
102      }
103      for (int j = 0; j < expectedTokenSequences[i].length; j++) {
104        expected.append(tokenImage[expectedTokenSequences[i][j]]).append(' ');
105      }
106      if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
107        expected.append("...");
108      }
109      expected.append(EOL).append("    ");
110    }
111    String retval = "Encountered \"";
112    Token tok = currentToken.next;
113    for (int i = 0; i < maxSize; i++) {
114      if (i != 0) retval += " ";
115      if (tok.kind == 0) {
116        retval += tokenImage[0];
117        break;
118      }
119      retval += " " + tokenImage[tok.kind];
120      retval += " \"";
121      retval += add_escapes(tok.image);
122      retval += " \"";
123      tok = tok.next;
124    }
125    retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn;
126    retval += "." + EOL;
127    
128    
129    if (expectedTokenSequences.length == 0) {
130        // Nothing to add here
131    } else {
132            if (expectedTokenSequences.length == 1) {
133              retval += "Was expecting:" + EOL + "    ";
134            } else {
135              retval += "Was expecting one of:" + EOL + "    ";
136            }
137            retval += expected.toString();
138    }
139    
140    return retval;
141  }
142
143
144  /*
145   * Used to convert raw characters to their escaped version
146   * when these raw version cannot be used as part of an ASCII
147   * string literal.
148   */
149  static String add_escapes(String str) {
150      StringBuffer retval = new StringBuffer();
151      char ch;
152      for (int i = 0; i < str.length(); i++) {
153        switch (str.charAt(i))
154        {
155           case '\b':
156              retval.append("\\b");
157              continue;
158           case '\t':
159              retval.append("\\t");
160              continue;
161           case '\n':
162              retval.append("\\n");
163              continue;
164           case '\f':
165              retval.append("\\f");
166              continue;
167           case '\r':
168              retval.append("\\r");
169              continue;
170           case '\"':
171              retval.append("\\\"");
172              continue;
173           case '\'':
174              retval.append("\\\'");
175              continue;
176           case '\\':
177              retval.append("\\\\");
178              continue;
179           default:
180              if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
181                 String s = "0000" + Integer.toString(ch, 16);
182                 retval.append("\\u" + s.substring(s.length() - 4, s.length()));
183              } else {
184                 retval.append(ch);
185              }
186              continue;
187        }
188      }
189      return retval.toString();
190   }
191
192}
193/* JavaCC - OriginalChecksum=5472a52971ad0e47f37144467174b5ba (do not edit this line) */