1 /*
2 * #%L
3 * Native ARchive plugin for Maven
4 * %%
5 * Copyright (C) 2002 - 2014 NAR Maven Plugin developers.
6 * %%
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * 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, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * #L%
19 */
20 package com.github.maven_nar.cpptasks.parser;
21
22 /**
23 * This parser state checks consumed characters against a specific character
24 * (case insensitive).
25 *
26 * @author Curt Arnold
27 */
28 public final class CaseInsensitiveLetterState extends AbstractParserState {
29 /**
30 * Next state if a match is found.
31 */
32 private final AbstractParserState nextState;
33
34 /**
35 * Next state if not match is found.
36 */
37 private final AbstractParserState noMatchState;
38
39 /**
40 * Lower case version of character to match.
41 */
42 private final char lowerLetter;
43
44 /**
45 * Lower case version of character to match.
46 */
47 private final char upperLetter;
48
49 /**
50 * Constructor.
51 *
52 * @param parser
53 * parser
54 * @param matchLetter
55 * letter to match
56 * @param nextStateArg
57 * next state if a match on the letter
58 * @param noMatchStateArg
59 * state if no match on letter
60 */
61 public CaseInsensitiveLetterState(final AbstractParser parser, final char matchLetter,
62 final AbstractParserState nextStateArg, final AbstractParserState noMatchStateArg) {
63 super(parser);
64 this.lowerLetter = Character.toLowerCase(matchLetter);
65 this.upperLetter = Character.toUpperCase(matchLetter);
66 this.nextState = nextStateArg;
67 this.noMatchState = noMatchStateArg;
68 }
69
70 /**
71 * Consumes a character and returns the next state for the parser.
72 *
73 * @param ch
74 * next character
75 * @return the configured nextState if ch is the expected character or the
76 * configure noMatchState otherwise.
77 */
78 @Override
79 public AbstractParserState consume(final char ch) {
80 if (ch == this.lowerLetter || ch == this.upperLetter) {
81 return this.nextState;
82 }
83 if (ch == '\n') {
84 getParser().getNewLineState();
85 }
86 return this.noMatchState;
87 }
88 }