# SpringMediatorFactory.java

    /*
     *  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 org.apache.synapse.mediators.spring;

    import org.apache.axiom.om.OMAttribute;
    import org.apache.axiom.om.OMElement;
    import org.apache.synapse.Mediator;
    import org.apache.synapse.config.xml.XMLConfigConstants;
    import org.apache.synapse.config.xml.AbstractMediatorFactory;

    import javax.xml.namespace.QName;
    import java.util.Properties;

    /**
     * Creates an instance of a Spring mediator that refers to the given Spring
     * configuration and bean. Optionally, one could specify an in-lined Spring
     * configuration as opposed to a globally defined Spring configuration
     * <p/>
     * <spring bean="exampleBean1" key="string""/>
     */
    @SuppressWarnings({"UnusedDeclaration"})
    public class SpringMediatorFactory extends AbstractMediatorFactory {

        private static final QName TAG_NAME = new QName(XMLConfigConstants.SYNAPSE_NAMESPACE, "spring");

        /**
         * Create a Spring mediator instance referring to the bean and configuration given
         * by the OMElement declaration
         *
         * @param elem the OMElement that specifies the Spring mediator configuration
         * @param properties
         * @return the Spring mediator instance created
         */
        public Mediator createSpecificMediator(OMElement elem, Properties properties) {

            SpringMediator sm = new SpringMediator();
            OMAttribute bean = elem.getAttribute(new QName(XMLConfigConstants.NULL_NAMESPACE, "bean"));
            OMAttribute key  = elem.getAttribute(new QName(XMLConfigConstants.NULL_NAMESPACE, "key"));

            if (bean == null) {
                handleException("The 'bean' attribute is required for a Spring mediator definition");
            } else if (key == null) {
                handleException("A 'key' attribute is required for a Spring mediator definition");
            } else {

                 // after successfully creating the mediator
                 // set its common attributes such as tracing etc
                processAuditStatus(sm,elem);
                sm.setBeanName(bean.getAttributeValue());
                sm.setConfigKey(key.getAttributeValue());
                return sm;
            }
            return null;
        }

        public QName getTagQName() {
            return TAG_NAME;
        }
    }