//
// This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, v1.0.1-05/30/2003 05:06 AM(java_re)-fcs 
// See <a href="http://java.sun.com/xml/jaxb">http://java.sun.com/xml/jaxb</a> 
// Any modifications to this file will be lost upon recompilation of the source schema. 
// Generated on: 2004.05.05 at 11:43:44 PDT 
//

/*
 * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

/*
 * @(#)$Id: UnmarshallingEventHandlerAdaptor.java,v 1.7 2003/05/20 18:27:56 kk122374 Exp $
 */
package DDLSchema.impl.runtime;

import javax.xml.bind.ValidationEvent;
import javax.xml.bind.helpers.ValidationEventImpl;
import javax.xml.bind.helpers.ValidationEventLocatorImpl;

import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;

/**
 * Redirects events to another SAX ContentHandler.
 * 
 * <p>
 * Note that the SAXException returned by the ContentHandler is
 * unreported. So we have to catch them and report it, then rethrow
 * it if necessary. 
 * 
 * @author
 * 	Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
 */
public class UnmarshallingEventHandlerAdaptor implements UnmarshallingEventHandler {
    
    protected final UnmarshallingContext context;

    /** This handler will receive SAX events. */
    protected final ContentHandler handler;

    public UnmarshallingEventHandlerAdaptor(UnmarshallingContext _ctxt,ContentHandler _handler) throws SAXException {
        this.context = _ctxt;
        this.handler = _handler;
        
        // emulate the start of documents
        try {
            handler.setDocumentLocator(context.getLocator());
            handler.startDocument();
        } catch( SAXException e ) {
            error(e);
        }
    }

    public Object owner() {
        return null;
    }


    // nest level of elements.
    private int depth = 0;
        
    public void enterAttribute(String uri, String local, String qname) throws SAXException {
    }

    public void enterElement(String uri, String local, String qname, Attributes atts) throws SAXException {
        depth++;
        try {
            handler.startElement(uri,local,qname,atts);
        } catch( SAXException e ) {
            error(e);
        }
        context.pushAttributes(atts,true);
    }

    public void leaveAttribute(String uri, String local, String qname) throws SAXException {
    }

    public void leaveElement(String uri, String local, String qname) throws SAXException {
        try {
            handler.endElement(uri,local,qname);
        } catch( SAXException e ) {
            error(e);
        }
        context.popAttributes();
        
        depth--;
        if(depth==0) {
            // emulate the end of the document
            try {
                handler.endDocument();
            } catch( SAXException e ) {
                error(e);
            }
            context.popContentHandler();
        }
    }

    public void text(String s) throws SAXException {
        try {
            handler.characters(s.toCharArray(),0,s.length());
        } catch( SAXException e ) {
            error(e);
        }
    }
    
    private void error( SAXException e ) throws SAXException {
        context.handleEvent(new ValidationEventImpl(
            ValidationEvent.ERROR,
            e.getMessage(),
            new ValidationEventLocatorImpl(context.getLocator()),
            e
        ), false);
    }

    public void leaveChild(int nextState) throws SAXException {
    }
}
