/*
 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *$Id: Provider.java,v 1.1 2005/09/30 18:14:51 robc Exp $
 */

package javax.xml.ws.spi;

import javax.xml.ws.Endpoint;
import javax.xml.ws.WebServiceException;
import javax.xml.namespace.QName;

/**
 * Service provider for <code>ServiceDelegate</code> and
 * <code>Endpoint</code> objects.
 * <p>
 * 
 * @since JAX-WS 2.0
 */
public abstract class Provider {
    
  /**
   * A constant representing the property used to lookup the
   * name of a <code>Provider</code> implementation 
   * class.
   */
  static public final String JAXWSPROVIDER_PROPERTY
        = "javax.xml.ws.spi.Provider";

  /**
   * A constant representing the name of the default 
   * <code>Provider</code> implementation class.
  **/
  static private final String DEFAULT_JAXWSPROVIDER
        = "com.sun.xml.internal.ws.spi.ProviderImpl";
  
  
    /**
     * Creates a new instance of Provider 
     */
    protected Provider() {
    }
    
    /**
     *
     * Creates a new provider object.
     * <p>
     * The algorithm used to locate the provider subclass to use consists
     * of the following steps:
     * <p>
     * <ul>
     * <li>
     *   If a resource with the name of
     *   <code>META-INF/services/javax.xml.ws.spi.Provider</code>
     *   exists, then its first line, if present, is used as the UTF-8 encoded
     *   name of the implementation class.
     * </li>
     * <li>
     *   If the $java.home/lib/jaxws.properties file exists and it is readable by
     *   the <code>java.util.Properties.load(InputStream)</code> method and it contains
     *   an entry whose key is <code>javax.xml.ws.spi.Provider</code>, then the value of
     *   that entry is used as the name of the implementation class.
     * </li>
     * <li>
     *   If a system property with the name <code>javax.xml.ws.spi.Provider</code>
     *   is defined, then its value is used as the name of the implementation class.
     * </li>
     * <li>
     *   Finally, a default implementation class name is used.
     * </li>
     * </ul>
     *
     */
    public static Provider provider() {
        try {
            return (Provider)
            FactoryFinder.find(JAXWSPROVIDER_PROPERTY,
                               DEFAULT_JAXWSPROVIDER);
        } catch (WebServiceException ex) {
            throw ex;
        } catch (Exception ex) {
            throw new WebServiceException("Unable to create Provider: "+
                                ex.getMessage());
        }

    }
    
    /**
     * Creates a service delegate object.
     * <p>
     * @param wsdlDocumentLocation A URL pointing to the WSDL document
     *        for the service, or <code>null</code> if there isn't one.
     * @param serviceName The qualified name of the service.
     * @param serviceClass The service class, which must be either
     *        <code>javax.xml.ws.Service</code> or a subclass thereof.
     * @return The newly created service delegate.
     */
    public abstract ServiceDelegate createServiceDelegate(
                                    java.net.URL wsdlDocumentLocation,
                                    QName serviceName, Class serviceClass);
    
        
    /** 
     *
     * Creates an endpoint object with the provided binding and implementation
     * object.
     *
     * @param bindingId A URI specifying the desired binding (e.g. SOAP/HTTP)
     * @param implementor A service implementation object to which
     *        incoming requests will be dispatched. The corresponding
     *        class must be annotated with all the necessary Web service
     *        annotations.
     * @return The newly created endpoint.
     */
    public abstract Endpoint createEndpoint(String bindingId, 
                                            Object implementor);

    /**
     * Creates and publishes an endpoint object with the specified
     * address and implementation object.
     *
     * @param address A URI specifying the address and transport/protocol
     *        to use. A http: URI must result in the SOAP 1.1/HTTP
     *        binding being used. Implementations may support other
     *        URI schemes.
     * @param implementor A service implementation object to which
     *        incoming requests will be dispatched. The corresponding
     *        class must be annotated with all the necessary Web service
     *        annotations.
     * @return The newly created endpoint.
     */
    public abstract Endpoint createAndPublishEndpoint(String address,
						      Object implementor);
}