/*
 * $Id: SOAPConnectionFactory.java,v 1.4 2004/04/02 01:24:17 ofung Exp $
 * $Revision: 1.4 $
 * $Date: 2004/04/02 01:24:17 $
 */

/*
 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
package javax.xml.soap;

/**
 * A factory for creating <code>SOAPConnection</code> objects. Implementation of this class
 * is optional. If <code>SOAPConnectionFactory.newInstance()</code> throws an 
 * UnsupportedOperationException then the implementation does not support the
 * SAAJ communication infrastructure. Otherwise {@link SOAPConnection} objects
 * can be created by calling <code>createConnection()</code> on the newly
 * created <code>SOAPConnectionFactory</code> object.
 */
public abstract class SOAPConnectionFactory {
    /**
     * A constant representing the default value for a <code>SOAPConnection</code>
     * object. The default is the point-to-point SOAP connection.
     */
    static private final String DEFAULT_SOAP_CONNECTION_FACTORY
        = "com.sun.xml.internal.messaging.saaj.client.p2p.HttpSOAPConnectionFactory";

    /**
     * A constant representing the <code>SOAPConnection</code> class.
     */
    static private final String SF_PROPERTY
        = "javax.xml.soap.SOAPConnectionFactory";

    /**
     * Creates an instance of the default
     * <code>SOAPConnectionFactory</code> object.
     *
     * @return a new instance of a default
     *         <code>SOAPConnectionFactory</code> object
     *
     * @exception SOAPException if there was an error creating the
     *            <code>SOAPConnectionFactory</code>
     *
     * @exception UnsupportedOperationException if newInstance is not
     * supported.
     */
    public static SOAPConnectionFactory newInstance()
        throws SOAPException, UnsupportedOperationException
    {
        try {
        return (SOAPConnectionFactory)
                FactoryFinder.find(SF_PROPERTY,
                                   DEFAULT_SOAP_CONNECTION_FACTORY);
        } catch (Exception ex) {
            throw new SOAPException("Unable to create SOAP connection factory: "
                                    +ex.getMessage());
        }
    }

    /**
     * Create a new <code>SOAPConnection</code>.
     *
     * @return the new <code>SOAPConnection</code> object.
     *
     * @exception SOAPException if there was an exception creating the
     * <code>SOAPConnection</code> object.
     */
    public abstract SOAPConnection createConnection()
        throws SOAPException;
}