jaxws/src/share/classes/com/sun/xml/internal/bind/v2/runtime/ContentHandlerAdaptor.java

/*
 * Copyright 2006 Sun Microsystems, Inc.  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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun 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.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

package com.sun.xml.internal.bind.v2.runtime;

import java.io.IOException;

import javax.xml.stream.XMLStreamException;

import com.sun.istack.internal.FinalArrayList;
import com.sun.istack.internal.SAXException2;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

/**
 * Receives SAX2 events and send the equivalent events to
 * {@link XMLSerializer}
 *
 * @author
 *     Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
 */
final class ContentHandlerAdaptor extends DefaultHandler {

    /** Stores newly declared prefix-URI mapping. */
    private final FinalArrayList prefixMap = new FinalArrayList();

    /** Events will be sent to this object. */
    private final XMLSerializer serializer;

    private final StringBuffer text = new StringBuffer();


    ContentHandlerAdaptor( XMLSerializer _serializer ) {
        this.serializer = _serializer;
    }

    public void startDocument() {
        prefixMap.clear();
    }

    public void startPrefixMapping(String prefix, String uri) {
        prefixMap.add(prefix);
        prefixMap.add(uri);
    }

    public void startElement(String namespaceURI, String localName, String qName, Attributes atts)
        throws SAXException {
        try {
            flushText();

            int len = atts.getLength();

            serializer.startElement(namespaceURI,localName,getPrefix(qName),null);
            // declare namespace events
            for( int i=0; i<len; i++ ) {
                String qname = atts.getQName(i);
                if(qname.startsWith("xmlns"))
                    continue;
                String prefix = getPrefix(qname);

                serializer.getNamespaceContext().declareNamespace(
                    atts.getURI(i), prefix, true );
            }
            for( int i=0; i<prefixMap.size(); i+=2 ) {
                String prefix = (String)prefixMap.get(i);
                serializer.getNamespaceContext().declareNamespace(
                    (String)prefixMap.get(i+1),
                    prefix,
                    prefix.length()!=0 );
            }

            serializer.endNamespaceDecls(null);
            // fire attribute events
            for( int i=0; i<len; i++ ) {
                // be defensive.
                if(atts.getQName(i).startsWith("xmlns"))
                    continue;
                serializer.attribute( atts.getURI(i), atts.getLocalName(i), atts.getValue(i));
            }
            prefixMap.clear();
            serializer.endAttributes();
        } catch (IOException e) {
            throw new SAXException2(e);
        } catch (XMLStreamException e) {
            throw new SAXException2(e);
        }
    }

    private String getPrefix(String qname) {
        int idx = qname.indexOf(':');
        String prefix = (idx==-1)?qname:qname.substring(0,idx);
        return prefix;
    }

    public void endElement(String namespaceURI, String localName, String qName) throws SAXException {
        try {
            flushText();
            serializer.endElement();
        } catch (IOException e) {
            throw new SAXException2(e);
        } catch (XMLStreamException e) {
            throw new SAXException2(e);
        }
    }

    private void flushText() throws SAXException, IOException, XMLStreamException {
        if( text.length()!=0 ) {
            serializer.text(text.toString(),null);
            text.setLength(0);
        }
    }

    public void characters(char[] ch, int start, int length) {
        text.append(ch,start,length);
    }
}