01: /* Generated By:JavaCC: Do not edit this line. Token.java Version 3.0 */
02: package org.apache.derby.impl.tools.ij;
03:
04: /**
05: * Describes the input token stream.
06: */
07:
08: public class Token {
09:
10: /**
11: * An integer that describes the kind of this token. This numbering
12: * system is determined by JavaCCParser, and a table of these numbers is
13: * stored in the file ...Constants.java.
14: */
15: public int kind;
16:
17: /**
18: * beginLine and beginColumn describe the position of the first character
19: * of this token; endLine and endColumn describe the position of the
20: * last character of this token.
21: */
22: public int beginLine, beginColumn, endLine, endColumn;
23:
24: /**
25: * The string image of the token.
26: */
27: public String image;
28:
29: /**
30: * A reference to the next regular (non-special) token from the input
31: * stream. If this is the last token from the input stream, or if the
32: * token manager has not read tokens beyond this one, this field is
33: * set to null. This is true only if this token is also a regular
34: * token. Otherwise, see below for a description of the contents of
35: * this field.
36: */
37: public Token next;
38:
39: /**
40: * This field is used to access special tokens that occur prior to this
41: * token, but after the immediately preceding regular (non-special) token.
42: * If there are no such special tokens, this field is set to null.
43: * When there are more than one such special token, this field refers
44: * to the last of these special tokens, which in turn refers to the next
45: * previous special token through its specialToken field, and so on
46: * until the first special token (whose specialToken field is null).
47: * The next fields of special tokens refer to other special tokens that
48: * immediately follow it (without an intervening regular token). If there
49: * is no such token, this field is null.
50: */
51: public Token specialToken;
52:
53: /**
54: * Returns the image.
55: */
56: public String toString() {
57: return image;
58: }
59:
60: /**
61: * Returns a new Token object, by default. However, if you want, you
62: * can create and return subclass objects based on the value of ofKind.
63: * Simply add the cases to the switch for all those special cases.
64: * For example, if you have a subclass of Token called IDToken that
65: * you want to create if ofKind is ID, simlpy add something like :
66: *
67: * case MyParserConstants.ID : return new IDToken();
68: *
69: * to the following switch statement. Then you can cast matchedToken
70: * variable to the appropriate type and use it in your lexical actions.
71: */
72: public static final Token newToken(int ofKind) {
73: switch (ofKind) {
74: default:
75: return new Token();
76: }
77: }
78:
79: }
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