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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019-2020 Nordix 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.dcaegen2.services.pmmapper.utils;
import java.io.StringReader;
import java.io.StringWriter;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.transform.sax.SAXSource;
import org.onap.dcaegen2.services.pmmapper.exceptions.MappingException;
import org.onap.dcaegen2.services.pmmapper.model.Event;
import org.onap.dcaegen2.services.pmmapper.model.measurement.common.MeasurementFile;
import org.onap.dcaegen2.services.pmmapper.model.measurement.lte.MeasCollecFile;
import org.onap.dcaegen2.services.pmmapper.model.measurement.nr.MeasDataFile;
import org.onap.logging.ref.slf4j.ONAPLogAdapter;
import org.slf4j.LoggerFactory;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
/**
* Converts 3GPP PM Measurement xml string to MeasCollecFil and vice versa.
**/
public class MeasConverter {
private static final ONAPLogAdapter logger = new ONAPLogAdapter(LoggerFactory.getLogger(MeasConverter.class));
public static final String LTE_FILE_TYPE = "org.3GPP.32.435#measCollec";
public static final String NR_FILE_TYPE = "org.3GPP.28.550#measData";
/**
* Converts 3GPP Measurement xml string to MeasCollecFile.
**/
public MeasurementFile convert(Event event) {
logger.unwrap().debug("Converting 3GPP xml string to PM object");
Class targetClass = getPMFileClass(event);
try {
JAXBContext jaxbContext = JAXBContext.newInstance(targetClass);
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
SAXParserFactory saxFactory = SAXParserFactory.newInstance();
saxFactory.setNamespaceAware(false);
XMLReader reader = saxFactory.newSAXParser().getXMLReader();
SAXSource source = new SAXSource(reader,new InputSource(new StringReader(event.getBody())));
return (MeasurementFile) unmarshaller.unmarshal(source);
} catch (JAXBException | ParserConfigurationException | SAXException e) {
throw new MappingException("Unable to convert 3GPP xml to PM Measurement", e);
}
}
/**
* Converts MeasCollecFile to 3GPP Measurement xml string.
**/
public String convert(MeasurementFile measurement) {
logger.unwrap().debug("Converting Measurement to 3GPP xml string");
StringWriter writer = new StringWriter();
try {
JAXBContext jaxbContext = JAXBContext.newInstance(measurement.getClass());
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
marshaller.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE);
marshaller.marshal(measurement, writer);
} catch (JAXBException e) {
throw new MappingException("Unable to convert Measurement to 3GPP xml", e);
}
return writer.toString();
}
private Class getPMFileClass(Event event) {
Class pmFileClass;
if (event.getMetadata().getFileFormatType().equals(MeasConverter.LTE_FILE_TYPE)) {
pmFileClass = MeasCollecFile.class;
} else if(event.getMetadata().getFileFormatType().equals(NR_FILE_TYPE)) {
pmFileClass = MeasDataFile.class;
} else {
throw new MappingException("Failed to discover file type with first class support", new RuntimeException());
}
return pmFileClass;
}
}
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