/**
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided
* that the following conditions are met:
*
* 1. Redistributions of source code must retain copyright
* statements and notices. Redistributions must also contain a
* copy of this document.
*
* 2. Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. The name "Exolab" must not be used to endorse or promote
* products derived from this Software without prior written
* permission of Intalio, Inc. For written permission,
* please contact info@exolab.org.
*
* 4. Products derived from this Software may not be called "Exolab"
* nor may "Exolab" appear in their names without prior written
* permission of Intalio, Inc. Exolab is a registered
* trademark of Intalio, Inc.
*
* 5. Due credit should be given to the Exolab Project
* (http://www.exolab.org/).
*
* THIS SOFTWARE IS PROVIDED BY INTALIO, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* INTALIO, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Copyright 1999-2002 (C) Intalio, Inc. All Rights Reserved.
*
* $Id$
*/
package org.exolab.castor.xml.schema.reader;
//-- imported classes and packages
import org.exolab.castor.xml.AttributeSet;
import org.exolab.castor.xml.Namespaces;
import org.exolab.castor.xml.XMLException;
import org.exolab.castor.xml.util.AttributeSetImpl;
import org.xml.sax.AttributeList;
import org.xml.sax.DocumentHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
/**
* A SAX adapter class for the ComponentReader.
*
* @author <a href="mailto:kvisco@intalio.com">Keith Visco</a>
* @version $Revision$ $Date: 2006-04-14 04:14:43 -0600 (Fri, 14 Apr 2006) $
**/
public final class Sax2ComponentReader
implements DocumentHandler, org.xml.sax.ErrorHandler
{
//-------------------/
//- Class Variables -/
//-------------------/
private static final String XMLNS = "xmlns";
private static final String XMLNS_PREFIX = "xmlns:";
private static final String XML_PREFIX = "xml";
//----------------------/
//- Instance Variables -/
//----------------------/
private ComponentReader _compReader = null;
private Namespaces _namespaces = null;
//----------------/
//- Constructors -/
//----------------/
public Sax2ComponentReader(ComponentReader compReader) {
super();
_compReader = compReader;
_namespaces = new Namespaces();
} //-- Sax2ComponentReader
/**
* Processes the attributes and namespace declarations found
* in the given SAX AttributeList. The global AttributeSet
* is cleared and updated with the attributes. Namespace
* declarations are added to the set of namespaces in scope.
*
* @param atts the AttributeList to process.
**/
private AttributeSet processAttributeList(AttributeList atts)
throws SAXException
{
if (atts == null) return new AttributeSetImpl(0);
//-- process all namespaces first
int attCount = 0;
boolean[] validAtts = new boolean[atts.getLength()];
for (int i = 0; i < validAtts.length; i++) {
String attName = atts.getName(i);
if (attName.equals(XMLNS)) {
_namespaces.addNamespace("", atts.getValue(i));
}
else if (attName.startsWith(XMLNS_PREFIX)) {
String prefix = attName.substring(XMLNS_PREFIX.length());
_namespaces.addNamespace(prefix, atts.getValue(i));
}
else {
validAtts[i] = true;
++attCount;
}
}
//-- process validAtts...if any exist
AttributeSetImpl attSet = null;
if (attCount > 0) {
attSet = new AttributeSetImpl(attCount);
for (int i = 0; i < validAtts.length; i++) {
if (!validAtts[i]) continue;
String namespace = null;
String attName = atts.getName(i);
int idx = attName.indexOf(':');
if (idx > 0) {
String prefix = attName.substring(0, idx);
if (!prefix.equals(XML_PREFIX)) {
attName = attName.substring(idx+1);
namespace = _namespaces.getNamespaceURI(prefix);
if (namespace == null) {
String error = "The namespace associated with "+
"the prefix '" + prefix +
"' could not be resolved.";
throw new SAXException(error);
}
}
}
attSet.setAttribute(attName, atts.getValue(i), namespace);
}
}
else attSet = new AttributeSetImpl(0);
return attSet;
} //-- method: processAttributeList
//---------------------------------------/
//- org.xml.sax.DocumentHandler methods -/
//---------------------------------------/
public void characters(char[] ch, int start, int length)
throws org.xml.sax.SAXException
{
try {
_compReader.characters(ch, start, length);
}
catch(XMLException ex) {
throw new SAXException(ex);
}
} //-- characters
public void endDocument()
throws org.xml.sax.SAXException
{
//-- do nothing
} //-- endDocument
public void endElement(String name)
throws org.xml.sax.SAXException
{
String namespace = null;
int idx = name.indexOf(':');
if (idx >= 0 ) {
String prefix = name.substring(0,idx);
name = name.substring(idx+1);
namespace = _namespaces.getNamespaceURI(prefix);
}
else namespace = _namespaces.getNamespaceURI("");
//-- remove namespaces
if (_namespaces.getParent() != null) {
_namespaces = _namespaces.getParent();
}
try {
_compReader.endElement(name, namespace);
}
catch(XMLException ex) {
throw new SAXException(ex);
}
} //-- endElement
public void ignorableWhitespace(char[] ch, int start, int length)
throws org.xml.sax.SAXException
{
//-- do nothing
} //-- ignorableWhitespace
public void processingInstruction(String target, String data)
throws org.xml.sax.SAXException
{
//-- do nothing
} //-- processingInstruction
public void setDocumentLocator(Locator locator) {
_compReader.setDocumentLocator(locator);
} //-- setDocumentLocator
public void startDocument()
throws org.xml.sax.SAXException
{
//-- do nothing
} //-- startDocument
public void startElement(String name, AttributeList atts)
throws org.xml.sax.SAXException
{
//-- create new Namespace scope
Namespaces nsDecls = _namespaces.createNamespaces();
_namespaces = nsDecls;
//-- handle namespaces
AttributeSet attSet = processAttributeList(atts);
String namespace = null;
int idx = name.indexOf(':');
if (idx >= 0 ) {
String prefix = name.substring(0,idx);
name = name.substring(idx+1);
namespace = _namespaces.getNamespaceURI(prefix);
}
else namespace = _namespaces.getNamespaceURI("");
try {
_compReader.startElement(name, namespace, attSet, nsDecls);
}
catch(XMLException ex) {
throw new SAXException(ex);
}
} //-- startElement
//------------------------------------/
//- org.xml.sax.ErrorHandler methods -/
//------------------------------------/
//------------------------------------/
//- org.xml.sax.ErrorHandler methods -/
//------------------------------------/
public void error(SAXParseException exception)
throws org.xml.sax.SAXException
{
String systemId = exception.getSystemId();
String err = "Parsing Error : "+exception.getMessage()+'\n'+
"Line : "+ exception.getLineNumber() + '\n'+
"Column : "+exception.getColumnNumber() + '\n';
if (systemId != null) {
err = "In document: '"+systemId+"'\n" + err;
}
throw new SAXException (err);
} //-- error
public void fatalError(SAXParseException exception)
throws org.xml.sax.SAXException
{
String systemId = exception.getSystemId();
String err = "Parsing Error : "+exception.getMessage()+'\n'+
"Line : "+ exception.getLineNumber() + '\n'+
"Column : "+exception.getColumnNumber() + '\n';
if (systemId != null) {
err = "In document: '"+systemId+"'\n" + err;
}
throw new SAXException (err);
} //-- fatalError
public void warning(SAXParseException exception)
throws org.xml.sax.SAXException
{
String systemId = exception.getSystemId();
String err = "Parsing Error : "+exception.getMessage()+'\n'+
"Line : "+ exception.getLineNumber() + '\n'+
"Column : "+exception.getColumnNumber() + '\n';
if (systemId != null) {
err = "In document: '"+systemId+"'\n" + err;
}
throw new SAXException (err);
} //-- warning
} //-- Sax2ComponentReader