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) or whitespace.
25 *
26 * @author Curt Arnold
27 */
28 public final class WhitespaceOrCaseInsensitiveLetterState extends AbstractParserState {
29 /**
30 * Next state if the character is found.
31 */
32 private final AbstractParserState nextState;
33
34 /**
35 * Character to match (lower case).
36 */
37 private final char lowerLetter;
38
39 /**
40 * Character to match (upper case).
41 */
42 private final char upperLetter;
43
44 /**
45 * Constructor.
46 *
47 * @param parser
48 * parser
49 * @param matchLetter
50 * letter to match
51 * @param nextStateArg
52 * next state if a match on the letter
53 */
54 public WhitespaceOrCaseInsensitiveLetterState(final AbstractParser parser, final char matchLetter,
55 final AbstractParserState nextStateArg) {
56 super(parser);
57 this.lowerLetter = Character.toLowerCase(matchLetter);
58 this.upperLetter = Character.toUpperCase(matchLetter);
59 this.nextState = nextStateArg;
60 }
61
62 /**
63 * Consumes a character and returns the next state for the parser.
64 *
65 * @param ch
66 * next character
67 * @return the configured nextState if ch is the expected character or the
68 * configure noMatchState otherwise.
69 */
70 @Override
71 public AbstractParserState consume(final char ch) {
72 if (ch == this.lowerLetter || ch == this.upperLetter) {
73 return this.nextState;
74 }
75 if (ch == ' ' || ch == '\t') {
76 return this;
77 }
78 if (ch == '\n') {
79 getParser().getNewLineState();
80 }
81 return null;
82 }
83 }