Package org.apache.synapse.config.xml

Source Code of org.apache.synapse.config.xml.EntrySerializer

/*
*  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.config.xml;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.axiom.om.OMFactory;
import org.apache.axiom.om.OMAbstractFactory;
import org.apache.axiom.om.OMNamespace;
import org.apache.axiom.om.OMElement;
import org.apache.synapse.config.Entry;
import org.apache.synapse.SynapseException;
import org.apache.synapse.SynapseConstants;

import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamConstants;
import java.net.URL;

/**
* Serializer for {@link Entry} instances.
*/
public class EntrySerializer {

    private static Log log = LogFactory.getLog(EntrySerializer.class);

    protected static final OMFactory fac = OMAbstractFactory.getOMFactory();
    protected static final OMNamespace synNS = SynapseConstants.SYNAPSE_OMNAMESPACE;
    protected static final OMNamespace nullNS
            = fac.createOMNamespace(XMLConfigConstants.NULL_NAMESPACE, "");

    /**
     * Serialize the Entry object to an OMElement representing the entry
     * @param entry
     * @param parent
     * @return OMElement representing the entry
     */
    public static OMElement serializeEntry(Entry entry, OMElement parent) {

        OMElement entryElement = fac.createOMElement("localEntry", synNS);
       
        if (entry.getDescription() != null) {

            OMElement descriptionElem = fac.createOMElement(
                    new QName(SynapseConstants.SYNAPSE_NAMESPACE, "description"));
            descriptionElem.setText(entry.getDescription());
            entryElement.addChild(descriptionElem);
        }

        entryElement.addAttribute(fac.createOMAttribute(
                "key", nullNS, entry.getKey().trim()));
        int type = entry.getType();
        if (type == Entry.URL_SRC) {
            URL srcUrl = entry.getSrc();
            if (srcUrl != null) {
                entryElement.addAttribute(fac.createOMAttribute(
                        "src", nullNS, srcUrl.toString().trim()));
            }
        } else if (type == Entry.INLINE_XML) {
            Object value = entry.getValue();
            if (value != null && value instanceof OMElement) {
                entryElement.addChild((OMElement) value);
            }
        } else if (type == Entry.INLINE_TEXT) {
            Object value = entry.getValue();
            if (value != null && value instanceof String) {
                entryElement.addChild(fac.createOMText(((String) value).trim(),
                        XMLStreamConstants.CDATA));
            }
        } else if (type == Entry.REMOTE_ENTRY) {
            // nothing to serialize
            return null;
        } else {
            handleException("Entry type undefined");
        }

        if (parent != null) {
            parent.addChild(entryElement);
        }
        return entryElement;
    }

    private static void handleException(String msg) {
        log.error(msg);
        throw new SynapseException(msg);
    }
}
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