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 * 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

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 */

package javax.xml.soap;

/**

* The access point for the implementation classes of the factories defined in the

* SAAJ API. All of the <code>newInstance</code> methods defined on factories in

* SAAJ 1.3 defer to instances of this class to do the actual object creation.

* The implementations of <code>newInstance()</code> methods (in SOAPFactory and MessageFactory)

* that existed in SAAJ 1.2 have been updated to also delegate to the SAAJMetaFactory when the SAAJ 1.2

* defined lookup fails to locate the Factory implementation class name.

*

* <p>

* SAAJMetaFactory is a service provider interface. There are no public methods on this

* class.

*

* @author SAAJ RI Development Team

* @since SAAJ 1.3

*/

public abstract class SAAJMetaFactory {

    static private final String META_FACTORY_CLASS_PROPERTY =

        "javax.xml.soap.MetaFactory";

    static final String DEFAULT_META_FACTORY_CLASS =

        "com.sun.xml.internal.messaging.saaj.soap.SAAJMetaFactoryImpl";

    /**

     * Creates a new instance of a concrete <code>SAAJMetaFactory</code> object.

     * The SAAJMetaFactory is an SPI, it pulls the creation of the other factories together into a

     * single place. Changing out the SAAJMetaFactory has the effect of changing out the entire SAAJ

     * implementation. Service providers provide the name of their <code>SAAJMetaFactory</code>

     * implementation.

     *

     * This method uses the following ordered lookup procedure to determine the SAAJMetaFactory implementation class to load:

     * <UL>

     *  <LI> Use the javax.xml.soap.MetaFactory system property.

     *  <LI> Use the properties file "lib/jaxm.properties" in the JRE directory. This configuration file is in standard

     * java.util.Properties format and contains the fully qualified name of the implementation class with the key being the

     * system property defined above.

     *  <LI> Use the Services API (as detailed in the JAR specification), if available, to determine the classname. The Services API

     * will look for a classname in the file META-INF/services/javax.xml.soap.MetaFactory in jars available to the runtime.

     *  <LI> Default to com.sun.xml.internal.messaging.saaj.soap.SAAJMetaFactoryImpl.

     * </UL>

     *

     * @return a concrete <code>SAAJMetaFactory</code> object

     * @exception SOAPException if there is an error in creating the <code>SAAJMetaFactory</code>

     */

    static SAAJMetaFactory getInstance() throws SOAPException {

            try {

                SAAJMetaFactory instance =

                    (SAAJMetaFactory) FactoryFinder.find(

                        META_FACTORY_CLASS_PROPERTY,

                        DEFAULT_META_FACTORY_CLASS);

                return instance;

            } catch (Exception e) {

                throw new SOAPException(

                    "Unable to create SAAJ meta-factory" + e.getMessage());

            }

    }

    protected SAAJMetaFactory() { }

     /**

      * Creates a <code>MessageFactory</code> object for

      * the given <code>String</code> protocol.

      *

      * @param protocol a <code>String</code> indicating the protocol

      * @exception SOAPException if there is an error in creating the

      *            MessageFactory

      * @see SOAPConstants#SOAP_1_1_PROTOCOL

      * @see SOAPConstants#SOAP_1_2_PROTOCOL

      * @see SOAPConstants#DYNAMIC_SOAP_PROTOCOL

      */

    protected abstract MessageFactory newMessageFactory(String protocol)

        throws SOAPException;

     /**

      * Creates a <code>SOAPFactory</code> object for

      * the given <code>String</code> protocol.

      *

      * @param protocol a <code>String</code> indicating the protocol

      * @exception SOAPException if there is an error in creating the

      *            SOAPFactory

      * @see SOAPConstants#SOAP_1_1_PROTOCOL

      * @see SOAPConstants#SOAP_1_2_PROTOCOL

      * @see SOAPConstants#DYNAMIC_SOAP_PROTOCOL

      */

    protected abstract SOAPFactory newSOAPFactory(String protocol)

        throws SOAPException;

}