/*
* Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package com.sun.tools.internal.xjc.reader.internalizer;
import java.io.IOException;
import java.io.File;
import java.net.URI;
import java.net.URISyntaxException;
import com.sun.istack.internal.SAXParseException2;
import org.xml.sax.Attributes;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.helpers.XMLFilterImpl;
/**
* XMLFilter that finds references to other schema files from
* SAX events.
*
* This implementation is a base implementation for typical case
* where we just need to look for a particular attribute which
* contains an URL to another schema file.
*
* @author
* Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
*/
public abstract class AbstractReferenceFinderImpl extends XMLFilterImpl {
protected final DOMForest parent;
protected AbstractReferenceFinderImpl( DOMForest _parent ) {
this.parent = _parent;
}
/**
* IF the given element contains a reference to an external resource,
* return its URL.
*
* @param nsURI
* Namespace URI of the current element
* @param localName
* Local name of the current element
* @return
* It's OK to return a relative URL.
*/
protected abstract String findExternalResource( String nsURI, String localName, Attributes atts);
public void startElement(String namespaceURI, String localName, String qName, Attributes atts)
throws SAXException {
super.startElement(namespaceURI, localName, qName, atts);
String relativeRef = findExternalResource(namespaceURI,localName,atts);
if(relativeRef==null) return; // non found
try {
// absolutize URL.
String ref = new URI(locator.getSystemId()).resolve(new URI(relativeRef)).toString();
// then parse this schema as well,
// but don't mark this document as a root.
parent.parse(ref,false);
} catch( URISyntaxException e ) {
String msg = e.getMessage();
if(new File(relativeRef).exists()) {
msg = Messages.format(Messages.ERR_FILENAME_IS_NOT_URI)+' '+msg;
}
SAXParseException spe = new SAXParseException2(
Messages.format(Messages.ERR_UNABLE_TO_PARSE,relativeRef, msg),
locator, e );
fatalError(spe);
throw spe;
} catch( IOException e ) {
SAXParseException spe = new SAXParseException2(
Messages.format(Messages.ERR_UNABLE_TO_PARSE,relativeRef,e.getMessage()),
locator, e );
fatalError(spe);
throw spe;
}
}
private Locator locator;
public void setDocumentLocator(Locator locator) {
super.setDocumentLocator(locator);
this.locator = locator;
}
};