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1   /*
2    *   Magic-Project is a turn based strategy simulator
3    *   Copyright (C) 2003-2007 Fabrice Daugan
4    *
5    *   This program is free software; you can redistribute it and/or modify it 
6    * under the terms of the GNU General Public License as published by the Free 
7    * Software Foundation; either version 2 of the License, or (at your option) any
8    * later version.
9    *
10   *   This program is distributed in the hope that it will be useful, but WITHOUT 
11   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
12   * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more 
13   * details.
14   *
15   *   You should have received a copy of the GNU General Public License along  
16   * with this program; if not, write to the Free Software Foundation, Inc., 
17   * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18   */
19  package net.sf.magicproject.expression;
20  
21  import java.io.IOException;
22  import java.io.InputStream;
23  
24  import net.sf.magicproject.operation.Dummy;
25  import net.sf.magicproject.operation.Operation;
26  import net.sf.magicproject.operation.OperationFactory;
27  
28  /***
29   * @author <a href="mailto:fabdouglas@users.sourceforge.net">Fabrice Daugan </a>
30   * @since 0.85
31   */
32  public final class ExpressionFactory {
33  
34  	private ExpressionFactory() {
35  		// Nothing to do
36  	}
37  
38  	/***
39  	 * Return the next Expression read from the current offset
40  	 * 
41  	 * @param inputFile
42  	 *          is the file containing this expression
43  	 * @return the next Expression read from the current offset
44  	 * @throws IOException
45  	 *           if error occurred during the reading process from the specified
46  	 *           input stream
47  	 */
48  	public static Expression readNextExpression(InputStream inputFile)
49  			throws IOException {
50  		final int idOperation = inputFile.read();
51  		final Operation op = OperationFactory.getOperation(idOperation);
52  		if (op == Dummy.getInstance()) {
53  			return Dummy.getInstance().readNextExpression(idOperation, inputFile);
54  		}
55  		return op.readNextExpression(inputFile);
56  	}
57  
58  }