| 1 | /* |
| 2 | * Copyright (c) 2005 The PseudoQ Project. |
| 3 | * |
| 4 | * This file is part of PseudoQ. |
| 5 | * |
| 6 | * PseudoQ is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU Lesser General Public License as published by |
| 8 | * the Free Software Foundation; either version 2.1 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * PseudoQ is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public License |
| 17 | * along with PseudoQ; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | package net.sourceforge.pseudoq.model.io; |
| 22 | |
| 23 | import net.sourceforge.pseudoq.model.Puzzle; |
| 24 | |
| 25 | /** |
| 26 | * Puzzle loader class which reads from a file. |
| 27 | * @author <a href="http://sourceforge.net/users/stevensa">Andrew Stevens</a> |
| 28 | */ |
| 29 | public class PuzzleFileReader { |
| 30 | /** Log4J logger */ |
| 31 | private static final org.apache.log4j.Logger log = |
| 32 | org.apache.log4j.LogManager.getLogger(PuzzleFileReader.class); |
| 33 | |
| 34 | /** Prevent creation of instances, as everything's static. */ |
| 35 | private PuzzleFileReader() { |
| 36 | } |
| 37 | |
| 38 | /** |
| 39 | * Deserialise the puzzle from the specified file. |
| 40 | */ |
| 41 | public static Puzzle read(String filename) |
| 42 | throws java.io.IOException, javax.xml.parsers.ParserConfigurationException { |
| 43 | try { |
| 44 | java.io.InputStream in = new java.io.BufferedInputStream(new java.io.FileInputStream(filename)); |
| 45 | javax.xml.parsers.DocumentBuilderFactory builderFactory = javax.xml.parsers.DocumentBuilderFactory.newInstance(); |
| 46 | // builderFactory.setValidating(false); |
| 47 | javax.xml.parsers.DocumentBuilder builder = builderFactory.newDocumentBuilder(); |
| 48 | builder.setEntityResolver(new CustomEntityResolver()); |
| 49 | org.w3c.dom.Document document = builder.parse(new org.xml.sax.InputSource(in)); |
| 50 | PuzzleScanner scanner = new PuzzleScanner(document); |
| 51 | final Puzzle puzzle = scanner.visitDocument(); |
| 52 | puzzle.setFilename(filename); |
| 53 | return puzzle; |
| 54 | } catch (javax.xml.parsers.ParserConfigurationException e) { |
| 55 | log.error("XML parser problem: " + e.getLocalizedMessage(), e); |
| 56 | throw e; |
| 57 | } catch (java.io.IOException e) { |
| 58 | log.error("IO Problem: " + e.getLocalizedMessage(), e); |
| 59 | throw e; |
| 60 | } catch (org.xml.sax.SAXException e) { |
| 61 | log.error("XML parser problem: " + e.getLocalizedMessage(), e); |
| 62 | throw new java.io.IOException("Invalid puzzle file"); |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | } |