/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
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
 * <code>UnsupportedOperationException</code> then the implementation does not support the SAAJ
 * communication infrastructure. Otherwise <code>SOAPConnection</code> objects can be created by
 * calling <code>createConnection()</code> on the newly created <code>SOAPConnectionFactory</code>
 * object.
 */
public abstract class SOAPConnectionFactory {

    public SOAPConnectionFactory() {
    }

    /**
     * Creates an instance of the default <CODE> SOAPConnectionFactory</CODE> object.
     *
     * @return a new instance of a default <CODE> SOAPConnectionFactory</CODE> object
     * @throws SOAPException                 if there was an error creating the <CODE>SOAPConnectionFactory
     * @throws 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 exception) {
            throw new SOAPException("Unable to create SOAP connection factory: "
                    + exception.getMessage());
        }
    }

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

    private static final String DEFAULT_SOAP_CONNECTION_FACTORY =
            "org.apache.axis2.saaj.SOAPConnectionFactoryImpl";

    private static final String SF_PROPERTY =
            "javax.xml.soap.SOAPConnectionFactory";
}