/*
* 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.OMElement;
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.QNameFactory;
import org.wso2.carbon.rulecep.commons.descriptions.XPathFactory;
import org.wso2.carbon.rulecep.commons.descriptions.service.ExtensibleConfiguration;
import org.wso2.carbon.rulecep.commons.descriptions.service.ExtensionBuilder;
import org.wso2.carbon.rulecep.commons.descriptions.service.OperationDescription;
import org.wso2.carbon.rulecep.commons.descriptions.service.ServiceDescription;
import javax.xml.namespace.QName;
/**
* Build extensions of the CEP services(i.e service , operation configuration extensions)
*/
public class CEPServiceExtensionBuilder implements ExtensionBuilder {
public static final String FILE_EXTENSION = "csl";
public static final String TARGET_NAMESPACE = "http://es.carbon.wso2.org";
public static final String TARGET_NAMESPACE_PREFIX = "es";
private static Log log = LogFactory.getLog(CEPServiceExtensionBuilder.class);
public void build(ExtensibleConfiguration extensibleConfiguration,
OMElement element, XPathFactory xPathFactory) {
if (ServiceDescription.TYPE.equals(extensibleConfiguration.geType())) {
ServiceDescription serviceDescription = (ServiceDescription) extensibleConfiguration;
QName parentQName = element.getQName();
QNameFactory qNameFactory = QNameFactory.getInstance();
// rule set
QName parameterQName = qNameFactory.createQName(CommonsConstants.ELE_QUERY,
parentQName);
OMElement parameterElem = element.getFirstChildWithName(parameterQName);
if (parameterElem == null) {
return;
}
QueryDescription description =
QueryDescriptionFactory.create(parameterElem, xPathFactory);
serviceDescription.setServiceExtensionDescription(description);
if (serviceDescription.getExtension() == null) {
serviceDescription.setExtension(FILE_EXTENSION);
}
if (serviceDescription.getTargetNamespace() == null) {
serviceDescription.setTargetNamespace(TARGET_NAMESPACE);
}
if (serviceDescription.getTargetNSPrefix() == null) {
serviceDescription.setTargetNSPrefix(TARGET_NAMESPACE_PREFIX);
}
} else if (OperationDescription.TYPE.equals(extensibleConfiguration.geType())) {
OperationDescription operationDescription =
(OperationDescription) extensibleConfiguration;
operationDescription.setForceInOnly(true);
CEPOperationExtensionDescription extensionDescription =
new CEPOperationExtensionDescription();
QName parentQName = element.getQName();
QNameFactory qNameFactory = QNameFactory.getInstance();
QName inStreamQName = qNameFactory.createQName(CommonsConstants.ELE_INPUT_EVENT_STREAM,
parentQName);
OMElement inStreamElement = element.getFirstChildWithName(inStreamQName);
if (inStreamElement != null) {
EventStreamDescription streamDescription =
EventStreamDescriptionFactory.create(inStreamElement, xPathFactory);
extensionDescription.setInputEventStream(streamDescription);
}
QName outStreamQName = qNameFactory.createQName(CommonsConstants.ELE_OUTPUT_EVENT_STREAM,
parentQName);
OMElement outStreamElement = element.getFirstChildWithName(outStreamQName);
if (outStreamElement != null) {
EventStreamDescription streamDescription =
EventStreamDescriptionFactory.create(outStreamElement, xPathFactory);
extensionDescription.setOutputEventStream(streamDescription);
}
operationDescription.setExtensionDescription(extensionDescription);
}
}
}