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.internalizer;
aoqi@0: 
aoqi@0: import com.sun.istack.internal.SAXParseException2;
aoqi@0: import org.xml.sax.Attributes;
aoqi@0: import org.xml.sax.Locator;
aoqi@0: import org.xml.sax.SAXException;
aoqi@0: import org.xml.sax.SAXParseException;
aoqi@0: import org.xml.sax.helpers.XMLFilterImpl;
aoqi@0: 
aoqi@0: import java.io.File;
aoqi@0: import java.io.IOException;
aoqi@0: import java.net.URI;
aoqi@0: import java.net.URISyntaxException;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * XMLFilter that finds references to other schema files from
aoqi@0:  * SAX events.
aoqi@0:  * <p/>
aoqi@0:  * This implementation is a base implementation for typical case
aoqi@0:  * where we just need to look for a particular attribute which
aoqi@0:  * contains an URL to another schema file.
aoqi@0:  *
aoqi@0:  * @author Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
aoqi@0:  */
aoqi@0: public abstract class AbstractReferenceFinderImpl extends XMLFilterImpl {
aoqi@0: 
aoqi@0:     protected final DOMForest parent;
aoqi@0: 
aoqi@0:     protected AbstractReferenceFinderImpl(DOMForest _parent) {
aoqi@0:         this.parent = _parent;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * IF the given element contains a reference to an external resource,
aoqi@0:      * return its URL.
aoqi@0:      *
aoqi@0:      * @param nsURI     Namespace URI of the current element
aoqi@0:      * @param localName Local name of the current element
aoqi@0:      * @return It's OK to return a relative URL.
aoqi@0:      */
aoqi@0:     protected abstract String findExternalResource(String nsURI, String localName, Attributes atts);
aoqi@0: 
aoqi@0:     @Override
aoqi@0:     public void startElement(String namespaceURI, String localName, String qName, Attributes atts)
aoqi@0:             throws SAXException {
aoqi@0:         super.startElement(namespaceURI, localName, qName, atts);
aoqi@0: 
aoqi@0:         String relativeRef = findExternalResource(namespaceURI, localName, atts);
aoqi@0:         if (relativeRef == null) {
aoqi@0:             return; // not found
aoqi@0:         }
aoqi@0:         try {
aoqi@0:             // absolutize URL.
aoqi@0:             String lsi = locator.getSystemId();
aoqi@0:             String ref;
aoqi@0:             URI relRefURI = new URI(relativeRef);
aoqi@0:             if (relRefURI.isAbsolute())
aoqi@0:                 ref = relativeRef;
aoqi@0:             else {
aoqi@0:                 if (lsi.startsWith("jar:")) {
aoqi@0:                     int bangIdx = lsi.indexOf('!');
aoqi@0:                     if (bangIdx > 0) {
aoqi@0:                         ref = lsi.substring(0, bangIdx + 1)
aoqi@0:                                 + new URI(lsi.substring(bangIdx + 1)).resolve(new URI(relativeRef)).toString();
aoqi@0:                     } else {
aoqi@0:                         ref = relativeRef;
aoqi@0:                     }
aoqi@0:                 } else {
aoqi@0:                     ref = new URI(lsi).resolve(new URI(relativeRef)).toString();
aoqi@0:                 }
aoqi@0:             }
aoqi@0: 
aoqi@0:             // then parse this schema as well,
aoqi@0:             // but don't mark this document as a root.
aoqi@0:             if (parent != null) { // this is there to allow easier testing
aoqi@0:                 parent.parse(ref, false);
aoqi@0:             }
aoqi@0:         } catch (URISyntaxException e) {
aoqi@0:             String msg = e.getMessage();
aoqi@0:             if (new File(relativeRef).exists()) {
aoqi@0:                 msg = Messages.format(Messages.ERR_FILENAME_IS_NOT_URI) + ' ' + msg;
aoqi@0:             }
aoqi@0: 
aoqi@0:             SAXParseException spe = new SAXParseException2(
aoqi@0:                     Messages.format(Messages.ERR_UNABLE_TO_PARSE, relativeRef, msg),
aoqi@0:                     locator, e);
aoqi@0: 
aoqi@0:             fatalError(spe);
aoqi@0:             throw spe;
aoqi@0:         } catch (IOException e) {
aoqi@0:             SAXParseException spe = new SAXParseException2(
aoqi@0:                     Messages.format(Messages.ERR_UNABLE_TO_PARSE, relativeRef, e.getMessage()),
aoqi@0:                     locator, e);
aoqi@0: 
aoqi@0:             fatalError(spe);
aoqi@0:             throw spe;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     private Locator locator;
aoqi@0: 
aoqi@0:     @Override
aoqi@0:     public void setDocumentLocator(Locator locator) {
aoqi@0:         super.setDocumentLocator(locator);
aoqi@0:         this.locator = locator;
aoqi@0:     }
aoqi@0: }