aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.tools.internal.xjc.reader.xmlschema.parser;
aoqi@0: 
aoqi@0: import java.io.File;
aoqi@0: import java.io.IOException;
aoqi@0: 
aoqi@0: import javax.xml.transform.Source;
aoqi@0: import javax.xml.transform.sax.SAXSource;
aoqi@0: import javax.xml.validation.SchemaFactory;
aoqi@0: 
aoqi@0: import com.sun.tools.internal.xjc.ConsoleErrorReporter;
aoqi@0: import com.sun.tools.internal.xjc.ErrorReceiver;
aoqi@0: import com.sun.tools.internal.xjc.util.ErrorReceiverFilter;
aoqi@0: 
aoqi@0: import com.sun.xml.internal.bind.v2.util.XmlFactory;
aoqi@0: import org.w3c.dom.ls.LSInput;
aoqi@0: import org.w3c.dom.ls.LSResourceResolver;
aoqi@0: import org.xml.sax.EntityResolver;
aoqi@0: import org.xml.sax.InputSource;
aoqi@0: import org.xml.sax.SAXException;
aoqi@0: 
aoqi@0: import static javax.xml.XMLConstants.W3C_XML_SCHEMA_NS_URI;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * Checks XML Schema XML representation constraints and
aoqi@0:  * schema component constraints by using JAXP 1.3 validation framework.
aoqi@0:  * <p/>
aoqi@0:  *
aoqi@0:  * @author Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
aoqi@0:  * @author Ryan Shoemaker (ryan.shoemaker@sun.com)
aoqi@0:  */
aoqi@0: public class SchemaConstraintChecker {
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * @param schemas      Schema files to be checked.
aoqi@0:      * @param errorHandler detected errors will be reported to this handler.
aoqi@0:      * @return true if there was no error, false if there were errors.
aoqi@0:      */
aoqi@0:     public static boolean check(InputSource[] schemas,
aoqi@0:                                 ErrorReceiver errorHandler,
aoqi@0:                                 final EntityResolver entityResolver,
aoqi@0:                                 boolean disableXmlSecurity) {
aoqi@0: 
aoqi@0:         ErrorReceiverFilter errorFilter = new ErrorReceiverFilter(errorHandler);
aoqi@0:         boolean hadErrors = false;
aoqi@0: 
aoqi@0:         SchemaFactory sf = XmlFactory.createSchemaFactory(W3C_XML_SCHEMA_NS_URI, disableXmlSecurity);
aoqi@0:         XmlFactory.allowExternalAccess(sf, "all", disableXmlSecurity);
aoqi@0:         sf.setErrorHandler(errorFilter);
aoqi@0:         if( entityResolver != null ) {
aoqi@0:             sf.setResourceResolver(new LSResourceResolver() {
aoqi@0:                 public LSInput resolveResource(String type, String namespaceURI, String publicId, String systemId, String baseURI) {
aoqi@0:                     try {
aoqi@0:                         // XSOM passes the namespace URI to the publicID parameter.
aoqi@0:                         // we do the same here .
aoqi@0:                         InputSource is = entityResolver.resolveEntity(namespaceURI, systemId);
aoqi@0:                         if(is==null)    return null;
aoqi@0:                         return new LSInputSAXWrapper(is);
aoqi@0:                     } catch (SAXException e) {
aoqi@0:                         // TODO: is this sufficient?
aoqi@0:                         return null;
aoqi@0:                     } catch (IOException e) {
aoqi@0:                         // TODO: is this sufficient?
aoqi@0:                         return null;
aoqi@0:                     }
aoqi@0:                 }
aoqi@0:             });
aoqi@0:         }
aoqi@0: 
aoqi@0:         try {
aoqi@0:             XmlFactory.allowExternalDTDAccess(sf, "all", disableXmlSecurity);
aoqi@0:             sf.newSchema(getSchemaSource(schemas, entityResolver));
aoqi@0:         } catch (SAXException e) {
aoqi@0:             // TODO: we haven't thrown exceptions from here before. should we just trap them and return false?
aoqi@0:             hadErrors = true;
aoqi@0:         } catch( OutOfMemoryError e) {
aoqi@0:             errorHandler.warning(null,Messages.format(Messages.WARN_UNABLE_TO_CHECK_CORRECTNESS));
aoqi@0:         }
aoqi@0: 
aoqi@0:         return !(hadErrors || errorFilter.hadError());
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * convert an array of {@link InputSource InputSource} into an
aoqi@0:      * array of {@link Source Source}
aoqi@0:      *
aoqi@0:      * @param schemas array of {@link InputSource InputSource}
aoqi@0:      * @return array of {@link Source Source}
aoqi@0:      */
aoqi@0:     private static Source[] getSchemaSource(InputSource[] schemas, EntityResolver entityResolver) throws SAXException {
aoqi@0:         SAXSource[] sources = new SAXSource[schemas.length];
aoqi@0:         for (int i = 0; i < schemas.length; i++) {
aoqi@0:             sources[i] = new SAXSource(schemas[i]);
aoqi@0: //            sources[i].getXMLReader().setEntityResolver(entityResolver);
aoqi@0:         }
aoqi@0:         return sources;
aoqi@0:     }
aoqi@0: 
aoqi@0:     // quick test
aoqi@0:     public static void main(String[] args) throws IOException {
aoqi@0:         InputSource[] sources = new InputSource[args.length];
aoqi@0:         for (int i = 0; i < args.length; i++)
aoqi@0:             sources[i] = new InputSource(new File(args[i]).toURL().toExternalForm());
aoqi@0: 
aoqi@0:         check(sources, new ConsoleErrorReporter(), null, true);
aoqi@0:     }
aoqi@0: }