2 * Copyright (c) 2018-2020. Developed by Hedgecode.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package org.hedgecode.chess.pgn.token;
19 import java.util.regex.Pattern;
21 import org.hedgecode.chess.pgn.entity.Game;
22 import org.hedgecode.chess.position.ParseException;
27 * @author Dmitry Samoshin aka gotty
29 public class Tokenizer {
33 TAG ( new TagToken() ),
34 EMPTY ( new EmptyToken() ),
35 MOVES ( new MovesToken() );
37 private Token<Game> token;
39 public Token<Game> token() {
43 Type(Token<Game> token) {
48 private static final Pattern TAG_PATTERN = Pattern.compile("^\\[[^]]+\\]$", Pattern.MULTILINE);
49 private static final Pattern EMPTY_PATTERN = Pattern.compile("^\\s*$", Pattern.MULTILINE);
50 private static final Pattern MOVES_PATTERN = Pattern.compile("^\\s*([^\\s])", Pattern.MULTILINE);
52 private final String pgn;
54 private Token<Game> token;
55 private String tokenPgn;
57 public Tokenizer(String pgn) {
62 public boolean hasToken() {
67 public void token(Game game) throws ParseException {
69 throw new ParseException("parse.pgn.null.token");
71 int index = token.token(game, tokenPgn);
72 tokenPgn = tokenPgn.substring(index);
76 public String sourcePgn() {
80 private void assignToken() {
82 if (!tokenPgn.isEmpty()) {
83 if (TAG_PATTERN.matcher(tokenPgn).find()) {
84 token = Type.TAG.token();
85 } else if (EMPTY_PATTERN.matcher(tokenPgn).find()) {
86 token = Type.EMPTY.token();
87 } else if (MOVES_PATTERN.matcher(tokenPgn).find()) {
88 token = Type.MOVES.token();