001    /* Generated By:JavaCC: Do not edit this line. ParseException.java Version 4.1 */
002    /* JavaCCOptions:KEEP_LINE_COL=null */
003    package org.jfree.formula.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     */
014    public 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=8c73fb4d6426a2bb82d61089f27b9249 (do not edit this line) */