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1   /*
2    * Copyright 2004-2006 the Seasar Foundation and the Others.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, 
13   * either express or implied. See the License for the specific language
14   * governing permissions and limitations under the License.
15   */
16  /* Generated By:JavaCC: Do not edit this line. ParseException.java Version 3.0 */
17  package org.seasar.tuigwaa.cms.core.wiki.engine;
18  
19  /***
20   * This exception is thrown when parse errors are encountered.
21   * You can explicitly create objects of this exception type by
22   * calling the method generateParseException in the generated
23   * parser.
24   *
25   * You can modify this class to customize your error reporting
26   * mechanisms so long as you retain the public fields.
27   */
28  public class ParseException extends Exception {
29  	
30  	private static final long serialVersionUID = 7320584037685407013L;
31  
32  /***
33     * This constructor is used by the method "generateParseException"
34     * in the generated parser.  Calling this constructor generates
35     * a new object of this type with the fields "currentToken",
36     * "expectedTokenSequences", and "tokenImage" set.  The boolean
37     * flag "specialConstructor" is also set to true to indicate that
38     * this constructor was used to create this object.
39     * This constructor calls its super class with the empty string
40     * to force the "toString" method of parent class "Throwable" to
41     * print the error message in the form:
42     *     ParseException: <result of getMessage>
43     */
44    public ParseException(Token currentTokenVal,
45                          int[][] expectedTokenSequencesVal,
46                          String[] tokenImageVal
47                         )
48    {
49      super("");
50      specialConstructor = true;
51      currentToken = currentTokenVal;
52      expectedTokenSequences = expectedTokenSequencesVal;
53      tokenImage = tokenImageVal;
54    }
55  
56    /***
57     * The following constructors are for use by you for whatever
58     * purpose you can think of.  Constructing the exception in this
59     * manner makes the exception behave in the normal way - i.e., as
60     * documented in the class "Throwable".  The fields "errorToken",
61     * "expectedTokenSequences", and "tokenImage" do not contain
62     * relevant information.  The JavaCC generated code does not use
63     * these constructors.
64     */
65  
66    public ParseException() {
67      super();
68      specialConstructor = false;
69    }
70  
71    public ParseException(String message) {
72      super(message);
73      specialConstructor = false;
74    }
75  
76    /***
77     * This variable determines which constructor was used to create
78     * this object and thereby affects the semantics of the
79     * "getMessage" method (see below).
80     */
81    protected boolean specialConstructor;
82  
83    /***
84     * This is the last token that has been consumed successfully.  If
85     * this object has been created due to a parse error, the token
86     * followng this token will (therefore) be the first error token.
87     */
88    public Token currentToken;
89  
90    /***
91     * Each entry in this array is an array of integers.  Each array
92     * of integers represents a sequence of tokens (by their ordinal
93     * values) that is expected at this point of the parse.
94     */
95    public int[][] expectedTokenSequences;
96  
97    /***
98     * This is a reference to the "tokenImage" array of the generated
99     * parser within which the parse error occurred.  This array is
100    * defined in the generated ...Constants interface.
101    */
102   public String[] tokenImage;
103 
104   /***
105    * This method has the standard behavior when this object has been
106    * created using the standard constructors.  Otherwise, it uses
107    * "currentToken" and "expectedTokenSequences" to generate a parse
108    * error message and returns it.  If this object has been created
109    * due to a parse error, and you do not catch it (it gets thrown
110    * from the parser), then this method is called during the printing
111    * of the final stack trace, and hence the correct error message
112    * gets displayed.
113    */
114   public String getMessage() {
115     if (!specialConstructor) {
116       return super.getMessage();
117     }
118     String expected = "";
119     int maxSize = 0;
120     for (int i = 0; i < expectedTokenSequences.length; i++) {
121       if (maxSize < expectedTokenSequences[i].length) {
122         maxSize = expectedTokenSequences[i].length;
123       }
124       for (int j = 0; j < expectedTokenSequences[i].length; j++) {
125         expected += tokenImage[expectedTokenSequences[i][j]] + " ";
126       }
127       if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
128         expected += "...";
129       }
130       expected += eol + "    ";
131     }
132     String retval = "Encountered \"";
133     Token tok = currentToken.next;
134     for (int i = 0; i < maxSize; i++) {
135       if (i != 0) retval += " ";
136       if (tok.kind == 0) {
137         retval += tokenImage[0];
138         break;
139       }
140       retval += add_escapes(tok.image);
141       tok = tok.next; 
142     }
143     retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn;
144     retval += "." + eol;
145     if (expectedTokenSequences.length == 1) {
146       retval += "Was expecting:" + eol + "    ";
147     } else {
148       retval += "Was expecting one of:" + eol + "    ";
149     }
150     retval += expected;
151     return retval;
152   }
153 
154   /***
155    * The end of line string for this machine.
156    */
157   protected String eol = System.getProperty("line.separator", "\n");
158  
159   /***
160    * Used to convert raw characters to their escaped version
161    * when these raw version cannot be used as part of an ASCII
162    * string literal.
163    */
164   protected String add_escapes(String str) {
165       StringBuffer retval = new StringBuffer();
166       char ch;
167       for (int i = 0; i < str.length(); i++) {
168         switch (str.charAt(i))
169         {
170            case 0 :
171               continue;
172            case '\b':
173               retval.append("//b");
174               continue;
175            case '\t':
176               retval.append("//t");
177               continue;
178            case '\n':
179               retval.append("//n");
180               continue;
181            case '\f':
182               retval.append("//f");
183               continue;
184            case '\r':
185               retval.append("//r");
186               continue;
187            case '\"':
188               retval.append("//\"");
189               continue;
190            case '\'':
191               retval.append("//\'");
192               continue;
193            case '//':
194               retval.append("////");
195               continue;
196            default:
197               if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
198                  String s = "0000" + Integer.toString(ch, 16);
199                  retval.append("//u" + s.substring(s.length() - 4, s.length()));
200               } else {
201                  retval.append(ch);
202               }
203               continue;
204         }
205       }
206       return retval.toString();
207    }
208 
209 }