# TaskDescriptionSerializer.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.task;

    import org.apache.axiom.om.OMAbstractFactory;
    import org.apache.axiom.om.OMElement;
    import org.apache.axiom.om.OMFactory;
    import org.apache.axiom.om.OMNamespace;
    import org.apache.commons.logging.Log;
    import org.apache.commons.logging.LogFactory;

    import java.util.List;

    /**
     * Serialize a TaskDescription into a OMElement
     */
    public class TaskDescriptionSerializer {

        private static final Log log = LogFactory.getLog(TaskDescriptionSerializer.class);
        private static final OMFactory omFactory = OMAbstractFactory.getOMFactory();

        private static final String NULL_NAMESPACE = "";
        private static final OMNamespace NULL_OMNS
            = omFactory.createOMNamespace(NULL_NAMESPACE, "");

        public static OMElement serializeTaskDescription(OMNamespace targetNamespace,
                                                         TaskDescription taskDescription) {

            if (taskDescription == null) {
                throw new SynapseTaskException("TaskDescription can not be null", log);
            }

            OMElement task = omFactory.createOMElement("task", targetNamespace);
            task.addAttribute("name", taskDescription.getName(), NULL_OMNS);

            String taskClass = taskDescription.getTaskImplClassName();
            if (taskClass != null && !"".equals(taskClass)) {
                task.addAttribute("class", taskDescription.getTaskImplClassName(), NULL_OMNS);
            }

            String group = taskDescription.getTaskGroup();
            if (group != null && !"".equals(group)) {
                task.addAttribute("group", group, NULL_OMNS);
            }

            List<String> pinnedServers = taskDescription.getPinnedServers();
            if (pinnedServers != null && !pinnedServers.isEmpty()) {
                StringBuffer pinnedServersStr = new StringBuffer(pinnedServers.get(0));
                for (int i = 1; i < pinnedServers.size(); i++) {
                    pinnedServersStr.append(" ").append(pinnedServers.get(i));
                }
                task.addAttribute(omFactory.createOMAttribute("pinnedServers",
                        NULL_OMNS, pinnedServersStr.toString()));
            }

            if (taskDescription.getTaskDescription() != null) {
                OMElement descElem = omFactory.createOMElement("description", targetNamespace, task);
                descElem.setText(taskDescription.getTaskDescription());
            }

            OMElement el = omFactory.createOMElement("trigger", targetNamespace, task);
            if (taskDescription.getCount() == 1) {
                el.addAttribute("once", "true", NULL_OMNS);
            } else if (taskDescription.getCronExpression() != null) {
                el.addAttribute("cron", taskDescription.getCronExpression(), NULL_OMNS);
            } else {
                if (taskDescription.getCount() != -1) {
                    el.addAttribute("count", Integer.toString(taskDescription.getCount()), NULL_OMNS);
                }

                if (taskDescription.getInterval() != 0) {

                    long interval = taskDescription.getInterval();
                    if (taskDescription.getIntervalInMs()) {
                        interval = interval / 1000;
                    }
                    el.addAttribute("interval", Long.toString(interval), NULL_OMNS);
                }
            }

            for (Object o : taskDescription.getXmlProperties()) {
                OMElement prop = (OMElement) o;
                if (prop != null) {
                    prop.setNamespace(targetNamespace);
                    task.addChild(prop.cloneOMElement());
                }
            }

            return task;
        }

    }