source: contrib/MailArchiver/sources/vendor/mime4j/apache-mime4j-0.7-SNAPSHOT-20110327.010440-17/dom/src/main/javacc/org/apache/james/mime4j/field/contentdisposition/ParseException.java @ 6785

Revision 6785, 7.8 KB checked in by rafaelraymundo, 12 years ago (diff)

Ticket #2946 - Liberado codigo do MailArchiver?. Documentação na subpasta DOCS.

Line 
1/* Generated By:JavaCC: Do not edit this line. ParseException.java Version 3.0 */
2/****************************************************************
3 * Licensed to the Apache Software Foundation (ASF) under one   *
4 * or more contributor license agreements.  See the NOTICE file *
5 * distributed with this work for additional information        *
6 * regarding copyright ownership.  The ASF licenses this file   *
7 * to you under the Apache License, Version 2.0 (the            *
8 * "License"); you may not use this file except in compliance   *
9 * with the License.  You may obtain a copy of the License at   *
10 *                                                              *
11 *   http://www.apache.org/licenses/LICENSE-2.0                 *
12 *                                                              *
13 * Unless required by applicable law or agreed to in writing,   *
14 * software distributed under the License is distributed on an  *
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
16 * KIND, either express or implied.  See the License for the    *
17 * specific language governing permissions and limitations      *
18 * under the License.                                           *
19 ****************************************************************/
20package org.apache.james.mime4j.field.contentdisposition.parser;
21
22/**
23 * This exception is thrown when parse errors are encountered.
24 * You can explicitly create objects of this exception type by
25 * calling the method generateParseException in the generated
26 * parser.
27 *
28 * Changes for Mime4J:
29 *   extends org.apache.james.mime4j.field.ParseException
30 *   added serialVersionUID
31 *   added constructor ParseException(Throwable)
32 *   default detail message is "Cannot parse field"
33 */
34public class ParseException extends org.apache.james.mime4j.dom.field.ParseException {
35
36  private static final long serialVersionUID = 1L;
37
38  /**
39   * This constructor is used by the method "generateParseException"
40   * in the generated parser.  Calling this constructor generates
41   * a new object of this type with the fields "currentToken",
42   * "expectedTokenSequences", and "tokenImage" set.  The boolean
43   * flag "specialConstructor" is also set to true to indicate that
44   * this constructor was used to create this object.
45   * This constructor calls its super class with the empty string
46   * to force the "toString" method of parent class "Throwable" to
47   * print the error message in the form:
48   *     ParseException: <result of getMessage>
49   */
50  public ParseException(Token currentTokenVal,
51                        int[][] expectedTokenSequencesVal,
52                        String[] tokenImageVal
53                       )
54  {
55    super("");
56    specialConstructor = true;
57    currentToken = currentTokenVal;
58    expectedTokenSequences = expectedTokenSequencesVal;
59    tokenImage = tokenImageVal;
60  }
61
62  /**
63   * The following constructors are for use by you for whatever
64   * purpose you can think of.  Constructing the exception in this
65   * manner makes the exception behave in the normal way - i.e., as
66   * documented in the class "Throwable".  The fields "errorToken",
67   * "expectedTokenSequences", and "tokenImage" do not contain
68   * relevant information.  The JavaCC generated code does not use
69   * these constructors.
70   */
71
72  public ParseException() {
73    super("Cannot parse field");
74    specialConstructor = false;
75  }
76
77  public ParseException(Throwable cause) {
78    super(cause);
79    specialConstructor = false;
80  }
81
82  public ParseException(String message) {
83    super(message);
84    specialConstructor = false;
85  }
86
87  /**
88   * This variable determines which constructor was used to create
89   * this object and thereby affects the semantics of the
90   * "getMessage" method (see below).
91   */
92  protected boolean specialConstructor;
93
94  /**
95   * This is the last token that has been consumed successfully.  If
96   * this object has been created due to a parse error, the token
97   * followng this token will (therefore) be the first error token.
98   */
99  public Token currentToken;
100
101  /**
102   * Each entry in this array is an array of integers.  Each array
103   * of integers represents a sequence of tokens (by their ordinal
104   * values) that is expected at this point of the parse.
105   */
106  public int[][] expectedTokenSequences;
107
108  /**
109   * This is a reference to the "tokenImage" array of the generated
110   * parser within which the parse error occurred.  This array is
111   * defined in the generated ...Constants interface.
112   */
113  public String[] tokenImage;
114
115  /**
116   * This method has the standard behavior when this object has been
117   * created using the standard constructors.  Otherwise, it uses
118   * "currentToken" and "expectedTokenSequences" to generate a parse
119   * error message and returns it.  If this object has been created
120   * due to a parse error, and you do not catch it (it gets thrown
121   * from the parser), then this method is called during the printing
122   * of the final stack trace, and hence the correct error message
123   * gets displayed.
124   */
125  public String getMessage() {
126    if (!specialConstructor) {
127      return super.getMessage();
128    }
129    StringBuffer expected = new StringBuffer();
130    int maxSize = 0;
131    for (int i = 0; i < expectedTokenSequences.length; i++) {
132      if (maxSize < expectedTokenSequences[i].length) {
133        maxSize = expectedTokenSequences[i].length;
134      }
135      for (int j = 0; j < expectedTokenSequences[i].length; j++) {
136        expected.append(tokenImage[expectedTokenSequences[i][j]]).append(" ");
137      }
138      if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
139        expected.append("...");
140      }
141      expected.append(eol).append("    ");
142    }
143    String retval = "Encountered \"";
144    Token tok = currentToken.next;
145    for (int i = 0; i < maxSize; i++) {
146      if (i != 0) retval += " ";
147      if (tok.kind == 0) {
148        retval += tokenImage[0];
149        break;
150      }
151      retval += add_escapes(tok.image);
152      tok = tok.next;
153    }
154    retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn;
155    retval += "." + eol;
156    if (expectedTokenSequences.length == 1) {
157      retval += "Was expecting:" + eol + "    ";
158    } else {
159      retval += "Was expecting one of:" + eol + "    ";
160    }
161    retval += expected.toString();
162    return retval;
163  }
164
165  /**
166   * The end of line string for this machine.
167   */
168  protected String eol = System.getProperty("line.separator", "\n");
169 
170  /**
171   * Used to convert raw characters to their escaped version
172   * when these raw version cannot be used as part of an ASCII
173   * string literal.
174   */
175  protected String add_escapes(String str) {
176      StringBuffer retval = new StringBuffer();
177      char ch;
178      for (int i = 0; i < str.length(); i++) {
179        switch (str.charAt(i))
180        {
181           case 0 :
182              continue;
183           case '\b':
184              retval.append("\\b");
185              continue;
186           case '\t':
187              retval.append("\\t");
188              continue;
189           case '\n':
190              retval.append("\\n");
191              continue;
192           case '\f':
193              retval.append("\\f");
194              continue;
195           case '\r':
196              retval.append("\\r");
197              continue;
198           case '\"':
199              retval.append("\\\"");
200              continue;
201           case '\'':
202              retval.append("\\\'");
203              continue;
204           case '\\':
205              retval.append("\\\\");
206              continue;
207           default:
208              if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
209                 String s = "0000" + Integer.toString(ch, 16);
210                 retval.append("\\u" + s.substring(s.length() - 4, s.length()));
211              } else {
212                 retval.append(ch);
213              }
214              continue;
215        }
216      }
217      return retval.toString();
218   }
219
220}
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