blob: edcfe83f2ef54399a1cad3aa577ab06daef4abd1 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
/*
*
* Copyright 2004 The Ant-Contrib project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.sf.antcontrib.cpptasks.parser;
/**
* This parser state checks consumed characters against a specific character
* (case insensitive).
*
* @author Curt Arnold
*/
public final class CaseInsensitiveLetterState
extends AbstractParserState {
/**
* Next state if a match is found.
*/
private final AbstractParserState nextState;
/**
* Next state if not match is found.
*/
private final AbstractParserState noMatchState;
/**
* Lower case version of character to match.
*/
private final char lowerLetter;
/**
* Lower case version of character to match.
*/
private final char upperLetter;
/**
* Constructor.
*
* @param parser
* parser
* @param matchLetter
* letter to match
* @param nextStateArg
* next state if a match on the letter
* @param noMatchStateArg
* state if no match on letter
*/
public CaseInsensitiveLetterState(final AbstractParser parser,
final char matchLetter,
final AbstractParserState nextStateArg,
final AbstractParserState noMatchStateArg) {
super(parser);
this.lowerLetter = Character.toLowerCase(matchLetter);
this.upperLetter = Character.toUpperCase(matchLetter);
this.nextState = nextStateArg;
this.noMatchState = noMatchStateArg;
}
/**
* Consumes a character and returns the next state for the parser.
*
* @param ch
* next character
* @return the configured nextState if ch is the expected character or the
* configure noMatchState otherwise.
*/
public AbstractParserState consume(final char ch) {
if (ch == lowerLetter || ch == upperLetter) {
return nextState;
}
if (ch == '\n') {
getParser().getNewLineState();
}
return noMatchState;
}
}
|
