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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 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.filtering;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;
import org.apache.commons.io.FilenameUtils;
import org.onap.dcaegen2.services.pmmapper.model.Event;
import org.onap.dcaegen2.services.pmmapper.model.MeasCollecFile;
import org.onap.dcaegen2.services.pmmapper.model.MeasCollecFile.MeasData;
import org.onap.dcaegen2.services.pmmapper.model.MeasCollecFile.MeasData.MeasInfo;
import org.onap.dcaegen2.services.pmmapper.model.MeasCollecFile.MeasData.MeasInfo.MeasType;
import org.onap.dcaegen2.services.pmmapper.model.MeasCollecFile.MeasData.MeasInfo.MeasValue;
import org.onap.dcaegen2.services.pmmapper.model.MeasCollecFile.MeasData.MeasInfo.MeasValue.R;
import org.onap.dcaegen2.services.pmmapper.model.MeasFilterConfig.Filter;
import org.onap.dcaegen2.services.pmmapper.utils.MeasConverter;
import org.onap.logging.ref.slf4j.ONAPLogAdapter;
import org.slf4j.LoggerFactory;
/**
* Provides filtering of the contents of the 3GPP PM Measurement file.
**/
public class MeasFilterHandler {
private static final ONAPLogAdapter logger = new ONAPLogAdapter(LoggerFactory.getLogger(MeasFilterHandler.class));
public static final String XML_EXTENSION = "xml";
private MeasConverter converter;
public MeasFilterHandler(MeasConverter converter) {
this.converter = converter;
}
/**
* Filters each measInfo node for measTypes that match the given measTypes from filters.
**/
public boolean filterByMeasType(Event event) {
Optional<Filter> filter = Optional.ofNullable(event.getFilter());
MeasCollecFile measCollecFile = event.getMeasCollecFile();
if (hasNoFilters(filter)) {
logger.unwrap().info("Skipping filtering by measTypes as filter config does not contain measTypes.");
return true;
}
if (measCollecFile.getMeasData().isEmpty()) {
logger.unwrap().info("Measurement file will not be processed further as MeasData is empty.");
return false;
}
logger.unwrap().info("Filtering the measurement file by measTypes.");
MeasData measData = measCollecFile.getMeasData().get(0);
List<MeasInfo> measInfos = measData.getMeasInfo();
List<MeasInfo> filteredMeasInfos = new ArrayList<>();
for (MeasInfo currentMeasInfo : measInfos) {
List<String> measTypesNode = currentMeasInfo.getMeasTypes();
if (measTypesNode != null && !measTypesNode.isEmpty()) {
setMeasInfosFromMeasTypes(currentMeasInfo, filteredMeasInfos, filter.get());
} else {
setMeasInfoFromMeasType(currentMeasInfo, filteredMeasInfos, filter.get());
}
}
if (filteredMeasInfos.isEmpty()) {
logger.unwrap().info("No filter match from the current measurement file.");
return false;
}
measData.setMeasInfo(filteredMeasInfos);
String filteredXMl = converter.convert(measCollecFile);
event.setBody(filteredXMl);
logger.unwrap().info("Successfully filtered the measurement by measTypes.");
return true;
}
/**
* Filters each measInfo node in the list for measTypes that match the given measTypes from filters.
**/
public boolean filterByMeasType(List<Event> events) {
boolean hasMatchAnyFilter = false;
for (int i = 0; i < events.size(); i++) {
Event currentEvent = events.get(i);
boolean hasMatchingFilter = filterByMeasType(currentEvent);
if (hasMatchingFilter) {
hasMatchAnyFilter = true;
} else {
events.remove(events.get(i));
}
}
if (!hasMatchAnyFilter) {
logger.unwrap().info("No filter match from all measurement files.");
return false;
}
return true;
}
private boolean hasNoFilters(Optional<Filter> filter) {
return !filter.isPresent() || filter.get().getMeasTypes().isEmpty();
}
/**
* Filters the measurement by file type. Measurement files starting with A or C are valid.
**/
public boolean filterByFileType(Event event) {
logger.unwrap().debug("Filtering the measurement by file type.");
String requestPath = event.getHttpServerExchange().getRequestPath();
String fileName = requestPath.substring(requestPath.lastIndexOf('/')+1);
boolean isXML = isXMLFile(fileName);
boolean isValidPMType = isValidPMType(fileName);
if(!isXML) {
logger.unwrap().info("PM measurement file must have an extension of .{}", XML_EXTENSION);
}
if(!isValidPMType) {
logger.unwrap().info("PM measurement file type not supported");
}
return isXML && isValidPMType;
}
private boolean isValidPMType(String fileName) {
return fileName.startsWith("C") || fileName.startsWith("A");
}
private boolean isXMLFile(String fileName) {
return FilenameUtils.getExtension(fileName).equals(XML_EXTENSION);
}
private boolean hasMatchingResults(List<MeasType> filteredMeasTypes, MeasValue measValue ) {
List<R> filteredResults = new ArrayList<>();
filteredMeasTypes.forEach( mst ->
measValue.getR().stream()
.filter(r -> mst.getP().equals(r.getP()))
.findFirst()
.ifPresent(filteredResults::add)
);
boolean hasResults = !filteredResults.isEmpty();
if(hasResults) {
measValue.replaceR(filteredResults);
}
return hasResults;
}
private void setMeasInfoFromMeasType(MeasInfo currentMeasInfo, List<MeasInfo> filteredMeasInfos, Filter filter) {
List<MeasType> filteredMeasTypes = currentMeasInfo.getMeasType().stream()
.filter(mt -> filter.getMeasTypes().contains(mt.getValue()))
.collect(Collectors.toList());
if(!filteredMeasTypes.isEmpty()) {
List<MeasValue> filteredMeasValues = currentMeasInfo.getMeasValue().stream()
.filter( mv -> hasMatchingResults(filteredMeasTypes, mv))
.collect(Collectors.toList());
currentMeasInfo.replaceMeasType(filteredMeasTypes);
currentMeasInfo.replaceMeasValue(filteredMeasValues);
filteredMeasInfos.add(currentMeasInfo);
}
}
private void setMeasInfosFromMeasTypes(MeasInfo currentMeasInfo, List<MeasInfo> filteredMeasInfos, Filter filter) {
MeasValue currentMeasValue = currentMeasInfo.getMeasValue()
.get(0);
List<String> measTypesNode = currentMeasInfo.getMeasTypes();
List<String> measResultsNode = currentMeasValue.getMeasResults();
List<String> filteredMeasResults = new ArrayList<>();
List<String> filteredMeasTypes = new ArrayList<>();
for (int j = 0; j < measTypesNode.size(); j++) {
String currentMeasType = measTypesNode.get(j);
List<String> measTypeFilters = filter.getMeasTypes();
if (measTypeFilters.contains(currentMeasType)) {
filteredMeasTypes.add(currentMeasType);
filteredMeasResults.add(measResultsNode.get(j));
}
}
if (!filteredMeasTypes.isEmpty()) {
currentMeasInfo.replaceMeasTypes(filteredMeasTypes);
currentMeasValue.replaceMeasResults(filteredMeasResults);
filteredMeasInfos.add(currentMeasInfo);
}
}
}
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