| 1 | /* This file is part of the project "Hilbert II" - http://www.qedeq.org |
| 2 | * |
| 3 | * Copyright 2000-2014, Michael Meyling <mime@qedeq.org>. |
| 4 | * |
| 5 | * "Hilbert II" is free software; you can redistribute |
| 6 | * it and/or modify it under the terms of the GNU General Public |
| 7 | * License as published by the Free Software Foundation; either |
| 8 | * version 2 of the License, or (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | */ |
| 15 | |
| 16 | package org.qedeq.kernel.xml.parser; |
| 17 | |
| 18 | import java.io.FileNotFoundException; |
| 19 | import java.io.InputStream; |
| 20 | |
| 21 | import org.qedeq.base.trace.Trace; |
| 22 | import org.qedeq.kernel.bo.KernelContext; |
| 23 | import org.qedeq.kernel.xml.handler.common.SaxDefaultHandler; |
| 24 | import org.xml.sax.EntityResolver; |
| 25 | import org.xml.sax.InputSource; |
| 26 | import org.xml.sax.SAXException; |
| 27 | import org.xml.sax.SAXParseException; |
| 28 | |
| 29 | |
| 30 | /** |
| 31 | * Resolve QEDEQ module XML schema. |
| 32 | * |
| 33 | * @version $Revision: 1.1 $ |
| 34 | * @author Michael Meyling |
| 35 | */ |
| 36 | public class SaxEntityResolver implements EntityResolver { |
| 37 | |
| 38 | /** This class. */ |
| 39 | private static final Class CLASS = SaxEntityResolver.class; |
| 40 | |
| 41 | /** Handler that parses the document. */ |
| 42 | private final SaxDefaultHandler handler; |
| 43 | |
| 44 | /** |
| 45 | * Constructor. |
| 46 | * |
| 47 | * @param handler This one does the parsing. |
| 48 | */ |
| 49 | public SaxEntityResolver(final SaxDefaultHandler handler) { |
| 50 | this.handler = handler; |
| 51 | } |
| 52 | |
| 53 | /* (non-Javadoc) |
| 54 | * @see org.xml.sax.EntityResolver#resolveEntity(java.lang.String, java.lang.String) |
| 55 | */ |
| 56 | public InputSource resolveEntity(final String publicId, final String systemId) |
| 57 | throws FileNotFoundException, SAXException { |
| 58 | final String method = "resolveEntity"; |
| 59 | Trace.param(CLASS, this, method, "systemId", systemId); |
| 60 | Trace.param(CLASS, this, method, "publicId", publicId); |
| 61 | if ((systemId == null)) { |
| 62 | return null; |
| 63 | } |
| 64 | if (systemId.equals("http://www.qedeq.org/" + KernelContext.getInstance() |
| 65 | .getKernelVersionDirectory() + "/xml/qedeq.xsd")) { |
| 66 | InputStream in = SaxEntityResolver.class.getResourceAsStream( |
| 67 | "/org/qedeq/kernel/xml/schema/qedeq.xsd"); |
| 68 | if (in == null) { |
| 69 | throw new FileNotFoundException("/org/qedeq/kernel/xml/schema/qedeq.xsd"); |
| 70 | } |
| 71 | InputSource inputSource = new InputSource(in); |
| 72 | inputSource.setPublicId(publicId); |
| 73 | inputSource.setSystemId(systemId); |
| 74 | return inputSource; |
| 75 | } else if (systemId.equals("http://www.qedeq.org/" |
| 76 | + KernelContext.getInstance().getKernelVersionDirectory() |
| 77 | + "/xml/parser.xsd")) { |
| 78 | InputStream in = SaxEntityResolver.class.getResourceAsStream( |
| 79 | "/org/qedeq/kernel/xml/schema/parser.xsd"); |
| 80 | if (in == null) { |
| 81 | throw new FileNotFoundException("/org/qedeq/kernel/xml/schema/parser.xsd"); |
| 82 | } |
| 83 | InputSource inputSource = new InputSource(in); |
| 84 | inputSource.setPublicId(publicId); |
| 85 | inputSource.setSystemId(systemId); |
| 86 | return inputSource; |
| 87 | } |
| 88 | Trace.trace(CLASS, this, method, "unknown entity"); |
| 89 | SAXParseException sax = handler.createSAXParseException( |
| 90 | "this kernel supports only the following XSDs: " |
| 91 | + "\"http://www.qedeq.org/" + KernelContext.getInstance() |
| 92 | .getKernelVersionDirectory() + "/xml/qedeq.xsd\"" + " and \n" |
| 93 | + "\"http://www.qedeq.org/" |
| 94 | + KernelContext.getInstance().getKernelVersionDirectory() |
| 95 | + "/xml/parser.xsd\" " |
| 96 | + "\nbut the document \"" + handler.getUrl() + "\" referenced \n\"" + systemId + "\""); |
| 97 | throw sax; |
| 98 | // LATER mime 20070604: this error should have correct location information, |
| 99 | // but is hasn't! this problem should be solved later... |
| 100 | } |
| 101 | } |