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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
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 * file that accompanied this code.
 *
 * Modifications:
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package com.sun.xml.ws.message;

import com.sun.xml.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();
}