/*
* 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.wso2.carbon.rulecep.commons.descriptions.cep;
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 org.wso2.carbon.rulecep.commons.CommonsConstants;
import org.wso2.carbon.rulecep.commons.descriptions.OMNamespaceFactory;
import org.wso2.carbon.rulecep.commons.descriptions.XPathSerializer;
import org.wso2.carbon.rulecep.commons.descriptions.service.ExtensibleConfiguration;
import org.wso2.carbon.rulecep.commons.descriptions.service.ExtensionSerializer;
import org.wso2.carbon.rulecep.commons.descriptions.service.OperationDescription;
import org.wso2.carbon.rulecep.commons.descriptions.service.ServiceDescription;
/**
* Serialize extensions of the CEP services(i.e service , operation configuration extensions) into XML
*/
public class CEPServiceExtensionSerializer implements ExtensionSerializer {
private Log log = LogFactory.getLog(CEPServiceExtensionSerializer.class);
private static final OMFactory OM_FACTORY = OMAbstractFactory.getOMFactory();
public OMElement serialize(ExtensibleConfiguration configuration,
XPathSerializer xPathSerializer, OMElement parent) {
if (ServiceDescription.TYPE.equals(configuration.geType())) {
ServiceDescription serviceDescription = (ServiceDescription) configuration;
QueryDescription extensionDescription =
(QueryDescription)
serviceDescription.getServiceExtensionDescription();
if (extensionDescription != null) {
OMNamespaceFactory omNamespaceFactory = OMNamespaceFactory.getInstance();
OMNamespace omNamespace = omNamespaceFactory.createOMNamespace(
parent.getNamespace().getNamespaceURI(), "");
OMElement ruleSetElement = OM_FACTORY.createOMElement(CommonsConstants.ELE_QUERY,
omNamespace);
QueryDescriptionSerializer.serialize(extensionDescription, xPathSerializer,
ruleSetElement);
parent.addChild(ruleSetElement);
}
return parent;
} else if (OperationDescription.TYPE.equals(configuration.geType())) {
OperationDescription operationDescription = (OperationDescription) configuration;
CEPOperationExtensionDescription extensionDescription =
(CEPOperationExtensionDescription)
operationDescription.getExtensionDescription();
if (extensionDescription != null) {
OMNamespaceFactory omNamespaceFactory = OMNamespaceFactory.getInstance();
OMNamespace omNamespace = omNamespaceFactory.createOMNamespace(
parent.getNamespace().getNamespaceURI(), "");
EventStreamDescription input = extensionDescription.getInputEventStream();
if (input != null) {
OMElement inEventStream = OM_FACTORY.createOMElement(
CommonsConstants.ELE_INPUT_EVENT_STREAM,
omNamespace);
EventStreamDescriptionSerializer.serialize(input, xPathSerializer, inEventStream);
parent.addChild(inEventStream);
}
EventStreamDescription output = extensionDescription.getInputEventStream();
if (output != null) {
OMElement outStream = OM_FACTORY.createOMElement(
CommonsConstants.ELE_OUTPUT_EVENT_STREAM,
omNamespace);
EventStreamDescriptionSerializer.serialize(output, xPathSerializer, outStream);
}
}
return parent;
}
return null;
}
}