/*
 * Copyright (c) 1997, 2010, 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.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.sun.xml.internal.ws.message;

import com.sun.xml.internal.ws.api.message.Message;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.helpers.XMLFilterImpl;

import javax.xml.transform.sax.SAXSource;

/**
 * @author Kohsuke Kawaguchi
 */
final class XMLReaderImpl extends XMLFilterImpl {

    private final Message msg;

    XMLReaderImpl(Message msg) {
        this.msg = msg;
    }

    public void parse(String systemId) {
        reportError();
    }

    private void reportError() {
        // TODO: i18n
        throw new IllegalStateException(
            "This is a special XMLReader implementation that only works with the InputSource given in SAXSource.");
    }

    public void parse(InputSource input) throws SAXException {
        if(input!=THE_SOURCE)
            reportError();
        msg.writeTo(this,this);
    }

    @Override
    public ContentHandler getContentHandler() {
        if(super.getContentHandler()==DUMMY)   return null;
        return super.getContentHandler();
    }

    @Override
    public void setContentHandler(ContentHandler contentHandler) {
        if(contentHandler==null)    contentHandler = DUMMY;
        super.setContentHandler(contentHandler);
    }

    private static final ContentHandler DUMMY = new DefaultHandler();

    /**
     * Special {@link InputSource} instance that we use to pass to {@link SAXSource}.
     */
    protected static final InputSource THE_SOURCE = new InputSource();
}
