/*
 *    Geotoolkit - An Open Source Java GIS Toolkit
 *    http://www.geotoolkit.org
 *
 *    (C) 2008 - 2009, Geomatys
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation; either
 *    version 2.1 of the License, or (at your option) any later version.
 *
 *    This library 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
 *    Lesser General Public License for more details.
 */
package org.geotoolkit.wms.xml;

import java.io.File;
import java.io.InputStream;
import java.io.Reader;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.logging.Level;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLStreamReader;
import javax.xml.transform.Source;

import org.apache.sis.util.logging.Logging;
import org.apache.sis.xml.MarshallerPool;

import org.opengis.metadata.citation.OnlineResource;

import org.w3c.dom.Node;
import org.xml.sax.InputSource;

/**
 *
 * @author Johann Sorel (Geomatys)
 * @author Guilhem Legal (Geomatys)
 * @module
 */
 public class WMSBindingUtilities {

     public static AbstractWMSCapabilities unmarshall(final Object source, final WMSVersion version) throws JAXBException{

        MarshallerPool selectedPool = WMSMarshallerPool.getInstance();
        Unmarshaller unMarshaller = selectedPool.acquireUnmarshaller();
        AbstractWMSCapabilities c = (AbstractWMSCapabilities) unmarshall(source, unMarshaller);
        selectedPool.recycle(unMarshaller);
        return c;
     }

     private static final Object unmarshall(final Object source, final Unmarshaller unMarshaller)
            throws JAXBException{
        if(source instanceof File){
            return unMarshaller.unmarshal( (File)source );
        }else if(source instanceof InputSource){
            return unMarshaller.unmarshal( (InputSource)source );
        }else if(source instanceof InputStream){
            return unMarshaller.unmarshal( (InputStream)source );
        }else if(source instanceof Node){
            return unMarshaller.unmarshal( (Node)source );
        }else if(source instanceof Reader){
            return unMarshaller.unmarshal( (Reader)source );
        }else if(source instanceof Source){
            return unMarshaller.unmarshal( (Source)source );
        }else if(source instanceof URL){
            return unMarshaller.unmarshal( (URL)source );
        }else if(source instanceof XMLEventReader){
            return unMarshaller.unmarshal( (XMLEventReader)source );
        }else if(source instanceof XMLStreamReader){
            return unMarshaller.unmarshal( (XMLStreamReader)source );
        }else if(source instanceof OnlineResource){
            final OnlineResource online = (OnlineResource) source;
            try {
                final URL url = online.getLinkage().toURL();
                return unMarshaller.unmarshal(url);
            } catch (MalformedURLException ex) {
                Logging.getLogger("org.geotoolkit.wms.xml").log(Level.WARNING, null, ex);
                return null;
            }

        }else{
            throw new IllegalArgumentException("Source object is not a valid class :" + source.getClass());
        }

    }

}