1 /*
   2  * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.tools.internal.xjc.reader.xmlschema.parser;
  27 
  28 import java.io.File;
  29 import java.io.IOException;
  30 
  31 import javax.xml.transform.Source;
  32 import javax.xml.transform.sax.SAXSource;
  33 import javax.xml.validation.SchemaFactory;
  34 
  35 import com.sun.tools.internal.xjc.ConsoleErrorReporter;
  36 import com.sun.tools.internal.xjc.ErrorReceiver;
  37 import com.sun.tools.internal.xjc.util.ErrorReceiverFilter;
  38 
  39 import com.sun.xml.internal.bind.v2.util.XmlFactory;
  40 import org.w3c.dom.ls.LSInput;
  41 import org.w3c.dom.ls.LSResourceResolver;
  42 import org.xml.sax.EntityResolver;
  43 import org.xml.sax.InputSource;
  44 import org.xml.sax.SAXException;
  45 
  46 import static javax.xml.XMLConstants.W3C_XML_SCHEMA_NS_URI;
  47 
  48 /**
  49  * Checks XML Schema XML representation constraints and
  50  * schema component constraints by using JAXP 1.3 validation framework.
  51  * <p>
  52  *
  53  * @author Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
  54  * @author Ryan Shoemaker (ryan.shoemaker@sun.com)
  55  */
  56 public class SchemaConstraintChecker {
  57 
  58     /**
  59      * @param schemas      Schema files to be checked.
  60      * @param errorHandler detected errors will be reported to this handler.
  61      * @return true if there was no error, false if there were errors.
  62      */
  63     public static boolean check(InputSource[] schemas,
  64                                 ErrorReceiver errorHandler,
  65                                 final EntityResolver entityResolver,
  66                                 boolean disableXmlSecurity) {
  67 
  68         ErrorReceiverFilter errorFilter = new ErrorReceiverFilter(errorHandler);
  69         boolean hadErrors = false;
  70 
  71         SchemaFactory sf = XmlFactory.createSchemaFactory(W3C_XML_SCHEMA_NS_URI, disableXmlSecurity);
  72         XmlFactory.allowExternalAccess(sf, "all", disableXmlSecurity);
  73         sf.setErrorHandler(errorFilter);
  74         if( entityResolver != null ) {
  75             sf.setResourceResolver(new LSResourceResolver() {
  76                 public LSInput resolveResource(String type, String namespaceURI, String publicId, String systemId, String baseURI) {
  77                     try {
  78                         // XSOM passes the namespace URI to the publicID parameter.
  79                         // we do the same here .
  80                         InputSource is = entityResolver.resolveEntity(namespaceURI, systemId);
  81                         if(is==null)    return null;
  82                         return new LSInputSAXWrapper(is);
  83                     } catch (SAXException e) {
  84                         // TODO: is this sufficient?
  85                         return null;
  86                     } catch (IOException e) {
  87                         // TODO: is this sufficient?
  88                         return null;
  89                     }
  90                 }
  91             });
  92         }
  93 
  94         try {
  95             XmlFactory.allowExternalDTDAccess(sf, "all", disableXmlSecurity);
  96             sf.newSchema(getSchemaSource(schemas, entityResolver));
  97         } catch (SAXException e) {
  98             // TODO: we haven't thrown exceptions from here before. should we just trap them and return false?
  99             hadErrors = true;
 100         } catch( OutOfMemoryError e) {
 101             errorHandler.warning(null,Messages.format(Messages.WARN_UNABLE_TO_CHECK_CORRECTNESS));
 102         }
 103 
 104         return !(hadErrors || errorFilter.hadError());
 105     }
 106 
 107     /**
 108      * convert an array of {@link InputSource InputSource} into an
 109      * array of {@link Source Source}
 110      *
 111      * @param schemas array of {@link InputSource InputSource}
 112      * @return array of {@link Source Source}
 113      */
 114     private static Source[] getSchemaSource(InputSource[] schemas, EntityResolver entityResolver) throws SAXException {
 115         SAXSource[] sources = new SAXSource[schemas.length];
 116         for (int i = 0; i < schemas.length; i++) {
 117             sources[i] = new SAXSource(schemas[i]);
 118 //            sources[i].getXMLReader().setEntityResolver(entityResolver);
 119         }
 120         return sources;
 121     }
 122 
 123     // quick test
 124     public static void main(String[] args) throws IOException {
 125         InputSource[] sources = new InputSource[args.length];
 126         for (int i = 0; i < args.length; i++)
 127             sources[i] = new InputSource(new File(args[i]).toURL().toExternalForm());
 128 
 129         check(sources, new ConsoleErrorReporter(), null, true);
 130     }
 131 }
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