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 *
25 * @author Curt Arnold
26 */
27 public final class LetterState extends AbstractParserState {
28 /**
29 * Next state if a match is found.
30 */
31 private final AbstractParserState nextState;
32
33 /**
34 * Next state if not match is found.
35 */
36 private final AbstractParserState noMatchState;
37
38 /**
39 * Character to match.
40 */
41 private final char thisLetter;
42
43 /**
44 * Constructor.
45 *
46 * @param parser
47 * parser
48 * @param matchLetter
49 * letter to match
50 * @param nextStateArg
51 * next state if a match on the letter
52 * @param noMatchStateArg
53 * state if no match on letter
54 */
55 public LetterState(final AbstractParser parser, final char matchLetter, final AbstractParserState nextStateArg,
56 final AbstractParserState noMatchStateArg) {
57 super(parser);
58 this.thisLetter = matchLetter;
59 this.nextState = nextStateArg;
60 this.noMatchState = noMatchStateArg;
61 }
62
63 /**
64 * Consumes a character and returns the next state for the parser.
65 *
66 * @param ch
67 * next character
68 * @return the configured nextState if ch is the expected character or the
69 * configure noMatchState otherwise.
70 */
71 @Override
72 public AbstractParserState consume(final char ch) {
73 if (ch == this.thisLetter) {
74 return this.nextState;
75 }
76 if (ch == '\n') {
77 getParser().getNewLineState();
78 }
79 return this.noMatchState;
80 }
81 }