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Java > Open Source Codes > org > apache > lucene > demo > html > TokenMgrError


1 /* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 3.0 */
2 package org.apache.lucene.demo.html;
3
4 public class TokenMgrError extends Error JavaDoc
5 {
6     
7    private static final long serialVersionUID = 1L;
8
9    /*
10     * Ordinals for various reasons why an Error of this type can be thrown.
11     */
12
13    /**
14     * Lexical error occured.
15     */
16    static final int LEXICAL_ERROR = 0;
17
18    /**
19     * An attempt wass made to create a second instance of a static token manager.
20     */
21    static final int STATIC_LEXER_ERROR = 1;
22
23    /**
24     * Tried to change to an invalid lexical state.
25     */
26    static final int INVALID_LEXICAL_STATE = 2;
27
28    /**
29     * Detected (and bailed out of) an infinite loop in the token manager.
30     */
31    static final int LOOP_DETECTED = 3;
32
33    /**
34     * Indicates the reason why the exception is thrown. It will have
35     * one of the above 4 values.
36     */
37    int errorCode;
38
39    /**
40     * Replaces unprintable characters by their espaced (or unicode escaped)
41     * equivalents in the given string
42     */
43    protected static final String JavaDoc addEscapes(String JavaDoc str) {
44       StringBuffer JavaDoc retval = new StringBuffer JavaDoc();
45       char ch;
46       for (int i = 0; i < str.length(); i++) {
47         switch (str.charAt(i))
48         {
49            case 0 :
50               continue;
51            case '\b':
52               retval.append("\\b"); //$NON-NLS-1$
53 continue;
54            case '\t':
55               retval.append("\\t"); //$NON-NLS-1$
56 continue;
57            case '\n':
58               retval.append("\\n"); //$NON-NLS-1$
59 continue;
60            case '\f':
61               retval.append("\\f"); //$NON-NLS-1$
62 continue;
63            case '\r':
64               retval.append("\\r"); //$NON-NLS-1$
65 continue;
66            case '\"':
67               retval.append("\\\""); //$NON-NLS-1$
68 continue;
69            case '\'':
70               retval.append("\\\'"); //$NON-NLS-1$
71 continue;
72            case '\\':
73               retval.append("\\\\"); //$NON-NLS-1$
74 continue;
75            default:
76               if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
77                  String JavaDoc s = "0000" + Integer.toString(ch, 16); //$NON-NLS-1$
78 retval.append("\\u" + s.substring(s.length() - 4, s.length())); //$NON-NLS-1$
79 } else {
80                  retval.append(ch);
81               }
82               continue;
83         }
84       }
85       return retval.toString();
86    }
87
88    /**
89     * Returns a detailed message for the Error when it is thrown by the
90     * token manager to indicate a lexical error.
91     * Parameters :
92     * EOFSeen : indicates if EOF caused the lexicl error
93     * curLexState : lexical state in which this error occured
94     * errorLine : line number when the error occured
95     * errorColumn : column number when the error occured
96     * errorAfter : prefix that was seen before this error occured
97     * curchar : the offending character
98     * Note: You can customize the lexical error message by modifying this method.
99     */
100    protected static String JavaDoc LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String JavaDoc errorAfter, char curChar) {
101       return("Lexical error at line " + //$NON-NLS-1$
102 errorLine + ", column " + //$NON-NLS-1$
103 errorColumn + ". Encountered: " + //$NON-NLS-1$
104 (EOFSeen ? "<EOF> " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int)curChar + "), ") + //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$
105 "after : \"" + addEscapes(errorAfter) + "\""); //$NON-NLS-1$ //$NON-NLS-2$
106 }
107
108    /**
109     * You can also modify the body of this method to customize your error messages.
110     * For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not
111     * of end-users concern, so you can return something like :
112     *
113     * "Internal Error : Please file a bug report .... "
114     *
115     * from this method for such cases in the release version of your parser.
116     */
117    public String JavaDoc getMessage() {
118       return super.getMessage();
119    }
120
121    /*
122     * Constructors of various flavors follow.
123     */
124
125    public TokenMgrError() {
126    }
127
128    public TokenMgrError(String JavaDoc message, int reason) {
129       super(message);
130       errorCode = reason;
131    }
132
133    public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String JavaDoc errorAfter, char curChar, int reason) {
134       this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
135    }
136 }
137
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