?? pgnfile.java
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/* PGNFile - A class to read PGN files. Copyright (C) 2003 The Java-Chess team <info@java-chess.de> This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.*/ package de.java_chess.javaChess.pgn;import antlr.*;import de.java_chess.javaChess.notation.*;import java.io.*;/** * This class implements the functionality to read a PGN file. */public class PGNFile { // Instance variables /** * The current PGN parser. */ PGNParser _parser; /** * The reader for the current file. */ Reader _reader; // Constructors /** * Create a new instance. * * @param reader The reader for the file. */ public PGNFile( Reader reader) { setReader( reader); } // Methods /** * Read one game from the current file. * * @return The notation of the game. * * @throws RecognitionException If a parser problem occured. * @throws TokenStreamException If a scanner problem occured. */ public final GameNotation readGame() throws RecognitionException, TokenStreamException { // A buffer for the result. GameNotation notationBuffer = new GameNotationImpl(); // Start the parsing of the file. getPGNParser().pgnGame( notationBuffer); return notationBuffer; } /** * Get the reader for the current file. * * @return The current reader. */ private final Reader getReader() { return _reader; } /** * Set a new reader for a file. * * @param reader The new reader. */ private final void setReader( Reader reader) { _reader = reader; } /** * Get the current parser, if there's already one, or * create a new parser and return it. * * @return The current PGN parser. */ private final PGNParser getPGNParser() { if( _parser == null) { // If there is no parser yet, create one. _parser = new PGNParser( new PGNLexer( getReader())); } return _parser; // And return it. } /** * Set the current parser. * * @param parser The new PGN parser. */ private final void setPGNParser( PGNParser parser) { _parser = parser; }} /* End of class PGNFile */
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