/*
* Copyright 2004,2005 The Apache Software Foundation.
*
* Licensed 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.cep.core.internal.config;
import org.apache.axiom.om.OMElement;
import org.wso2.carbon.cep.core.Bucket;
import org.wso2.carbon.cep.core.internal.util.CEPConstants;
import org.wso2.carbon.cep.core.exception.CEPConfigurationException;
import javax.xml.namespace.QName;
import java.util.Iterator;
/**
* this class is used to parse the top level bucket attributes
*/
public class BucketHelper {
public static Bucket fromOM(OMElement bucketElement) throws CEPConfigurationException {
Bucket bucket = new Bucket();
String name =
bucketElement.getAttributeValue(new QName(CEPConstants.CEP_CONF_ATTR_NAME));
bucket.setName(name);
OMElement descriptionElement =
bucketElement.getFirstChildWithName(new QName(CEPConstants.CEP_CONF_NAMESPACE,
CEPConstants.CEP_CONF_ELE_DESCRIPTION));
if (descriptionElement != null) {
bucket.setDescription(descriptionElement.getText());
}
String engineProvider =
bucketElement.getAttributeValue(
new QName(CEPConstants.CEP_CONF_ATTR_ENGINE_PROVIDER));
bucket.setEngineProvider(engineProvider);
OMElement inputOmElement = null;
for (Iterator iter = bucketElement.getChildrenWithName(new QName(CEPConstants.CEP_CONF_NAMESPACE,
CEPConstants.CEP_CONF_ELE_INPUT)); iter.hasNext();) {
inputOmElement = (OMElement) iter.next();
bucket.addInput(InputHelper.fromOM(inputOmElement));
}
OMElement queryOmElement = null;
for (Iterator iterator = bucketElement.getChildrenWithName(new QName(CEPConstants.CEP_CONF_NAMESPACE,
CEPConstants.CEP_CONF_ELE_QUERY)); iterator.hasNext();) {
queryOmElement = (OMElement) iterator.next();
bucket.addQuery(QueryHelper.fromOM(queryOmElement));
}
return bucket;
}
}