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52°North SOS Handler Module
/*
* Copyright (C) 2012-2018 52°North Initiative for Geospatial Open Source
* Software GmbH
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
* If the program is linked with libraries which are licensed under one of
* the following licenses, the combination of the program with the linked
* library is not considered a "derivative work" of the program:
*
* - Apache License, version 2.0
* - Apache Software License, version 1.0
* - GNU Lesser General Public License, version 3
* - Mozilla Public License, versions 1.0, 1.1 and 2.0
* - Common Development and Distribution License (CDDL), version 1.0
*
* Therefore the distribution of the program linked with libraries licensed
* under the aforementioned licenses, is permitted by the copyright holders
* if the distribution is compliant with both the GNU General Public
* License version 2 and the aforementioned licenses.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
* Public License for more details.
*/
package org.n52.sos.ds;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import javax.inject.Inject;
import org.hibernate.Session;
import org.n52.io.request.IoParameters;
import org.n52.series.db.DataAccessException;
import org.n52.series.db.HibernateSessionStore;
import org.n52.series.db.beans.DatasetEntity;
import org.n52.series.db.beans.FormatEntity;
import org.n52.series.db.beans.OfferingEntity;
import org.n52.series.db.beans.dataset.Dataset;
import org.n52.series.db.dao.DatasetDao;
import org.n52.series.db.dao.DbQuery;
import org.n52.shetland.ogc.filter.TemporalFilter;
import org.n52.shetland.ogc.gml.ReferenceType;
import org.n52.shetland.ogc.gml.time.TimePeriod;
import org.n52.shetland.ogc.ows.exception.NoApplicableCodeException;
import org.n52.shetland.ogc.ows.exception.OwsExceptionReport;
import org.n52.shetland.ogc.ows.extension.Extension;
import org.n52.shetland.ogc.ows.extension.Extensions;
import org.n52.shetland.ogc.sos.SosConstants;
import org.n52.shetland.ogc.sos.gda.GetDataAvailabilityConstants;
import org.n52.shetland.ogc.sos.gda.GetDataAvailabilityRequest;
import org.n52.shetland.ogc.sos.gda.GetDataAvailabilityResponse;
import org.n52.shetland.ogc.sos.gda.GetDataAvailabilityResponse.DataAvailability;
import org.n52.shetland.ogc.sos.gda.GetDataAvailabilityResponse.FormatDescriptor;
import org.n52.shetland.ogc.sos.gda.GetDataAvailabilityResponse.ObservationFormatDescriptor;
import org.n52.shetland.ogc.sos.gda.GetDataAvailabilityResponse.ProcedureDescriptionFormatDescriptor;
import org.n52.sos.ds.dao.GetDataAvailabilityDao;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
public class GetDataAvailabilityHandler extends AbstractGetDataAvailabilityHandler implements ApiQueryHelper {
private HibernateSessionStore sessionStore;
private Optional dao = Optional.empty();
public GetDataAvailabilityHandler() {
super(SosConstants.SOS);
}
@Inject
public void setConnectionProvider(HibernateSessionStore sessionStore) {
this.sessionStore = sessionStore;
}
@Inject
public void setGetDataAvaolabilityDao(Optional getDataAvailabilityDao) {
if (getDataAvailabilityDao != null) {
this.dao = getDataAvailabilityDao;
}
}
@Override
public GetDataAvailabilityResponse getDataAvailability(GetDataAvailabilityRequest request)
throws OwsExceptionReport {
GetDataAvailabilityResponse response = new GetDataAvailabilityResponse();
response.setService(request.getService());
response.setVersion(request.getVersion());
response.setResponseFormat(request.getResponseFormat());
if (checkForGDAv20(request)) {
response.setResponseFormat(GetDataAvailabilityConstants.NS_GDA_20);
}
for (DataAvailability da : queryDataAvailabilityValues(request)) {
if (da != null) {
response.addDataAvailability(da);
}
}
return response;
}
@Override
public boolean isSupported() {
return true;
}
private List queryDataAvailabilityValues(GetDataAvailabilityRequest request) throws OwsExceptionReport {
Session session = sessionStore.getSession();
try {
GDARequestContext context = new GDARequestContext(request);
boolean gdaV20 = checkForGDAv20(request);
for (final Dataset entity : new DatasetDao<>(session).getAllInstances(createDbQuery(request))) {
if (gdaV20) {
processDataAvailabilityV2(entity, context, session);
} else {
processDataAvailability(entity, context, session);
}
}
if (!gdaV20) {
return checkForDuplictation(context.getDataAvailabilityList());
}
return context.getDataAvailabilityList();
} catch (DataAccessException e) {
throw new NoApplicableCodeException().causedBy(e).withMessage(
"Error while querying data for GetDataAvailability!");
} finally {
sessionStore.returnSession(session);
}
}
private DbQuery createDbQuery(GetDataAvailabilityRequest req) {
Map map = Maps.newHashMap();
if (req.isSetFeaturesOfInterest()) {
map.put(IoParameters.FEATURES, listToString(req.getFeaturesOfInterest()));
}
if (req.isSetProcedures()) {
map.put(IoParameters.PROCEDURES, listToString(req.getProcedures()));
}
if (req.isSetObservedProperties()) {
map.put(IoParameters.PHENOMENA, listToString(req.getObservedProperties()));
}
if (req.isSetOfferings()) {
map.put(IoParameters.OFFERINGS, listToString(req.getOfferings()));
}
map.put(IoParameters.MATCH_DOMAIN_IDS, Boolean.toString(true));
return new DbQuery(IoParameters.createFromSingleValueMap(map));
}
private DataAvailability defaultProcessDataAvailability(Dataset entity, GDARequestContext context, Session session) throws OwsExceptionReport {
TimePeriod timePeriod = createTimePeriod(entity);
if (timePeriod != null && !timePeriod.isEmpty()) {
DataAvailability dataAvailability =
new DataAvailability(getProcedureReference(entity, context.getProcedures()), getObservedPropertyReference(
entity, context.getObservableProperties()), getFeatureOfInterestReference(entity,
context.getFeaturesOfInterest()), getOfferingReference(entity, context.getOfferings()), timePeriod);
if (isShowCount(context.getRequest()) && entity.getObservationCount() >= 0) {
dataAvailability.setCount(entity.getObservationCount());
}
if (isIncludeResultTime(context.getRequest()) && dao.isPresent()) {
dataAvailability.setResultTimes(dao.get().getResultTimes(dataAvailability, context.getRequest()));
}
return dataAvailability;
}
return null;
}
/**
* Get {@link DataAvailability}s for each series
*
* @param entity
* the {@link DatasetEntity} to get {@link DataAvailability}s for
* @param context
* Request context to get {@link DataAvailability}s
* @param session Hibernate session
* @throws OwsExceptionReport
* If an error occurs
*/
private void processDataAvailability(Dataset entity, GDARequestContext context, Session session) throws OwsExceptionReport {
DataAvailability dataAvailability = defaultProcessDataAvailability(entity, context, session);
if (dataAvailability != null) {
context.addDataAvailability(dataAvailability);
}
}
/**
* Get {@link DataAvailability}s for each offering of a series
*
* @param entity
* the {@link DatasetEntity} to get {@link DataAvailability}s for
* @param context
* Request context to get {@link DataAvailability}s
* @throws OwsExceptionReport
* If an error occurs
*/
private void processDataAvailabilityV2(Dataset entity, GDARequestContext context, Session session)
throws OwsExceptionReport {
DataAvailability dataAvailability = defaultProcessDataAvailability(entity, context, session);
if (dataAvailability != null) {
dataAvailability.setFormatDescriptor(getFormatDescriptor(context, entity));
if (dao.isPresent()) {
dataAvailability.setMetadata(dao.get().getMetadata(dataAvailability));
}
context.addDataAvailability(dataAvailability);
}
checkForParentOfferings(context, entity.getOffering());
}
private TimePeriod createTimePeriod(Dataset entity) {
return new TimePeriod(entity.getFirstValueAt(), entity.getLastValueAt());
}
private void checkForParentOfferings(GDARequestContext context, OfferingEntity offeringEntity) {
if (context.isSetDataAvailabilityList()) {
List requestedOfferings = context.getRequest().getOfferings();
for (String requestedOffering : requestedOfferings) {
Set childOfferings = getChildOfferings(offeringEntity);
if (!childOfferings.isEmpty()) {
if (context.hasDataAvailability(requestedOffering)) {
Set parentDataAvailabilities =
context.getDataAvailability(requestedOffering);
for (String childOffering : childOfferings) {
Set childDataAvailabilities = context.getDataAvailability(childOffering);
for (DataAvailability childDataAvailability : childDataAvailabilities) {
for (DataAvailability parentDataAvailability : parentDataAvailabilities) {
parentDataAvailability.merge(childDataAvailability, true);
}
}
}
} else {
Set parentDataAvailabilities = Sets.newHashSet();
for (String childOffering : childOfferings) {
Set childDataAvailabilities = context.getDataAvailability(childOffering);
for (DataAvailability childDataAvailability : childDataAvailabilities) {
addParentDataAvailabilityIfMissing(parentDataAvailabilities, childDataAvailability,
new ReferenceType(requestedOffering));
for (DataAvailability parentDataAvailability : parentDataAvailabilities) {
parentDataAvailability.merge(childDataAvailability, true);
}
}
}
context.addDataAvailabilities(parentDataAvailabilities);
}
}
}
}
}
private Set getChildOfferings(OfferingEntity offering) {
Set childs = Sets.newTreeSet();
if (offering.hasChildren()) {
for (OfferingEntity child : offering.getChildren()) {
childs.add(child.getIdentifier());
childs.addAll(getChildOfferings(child));
}
}
return childs;
}
private boolean checkForGDAv20(GetDataAvailabilityRequest request) {
return (request.isSetResponseFormat() && GetDataAvailabilityConstants.NS_GDA_20.equals(request.getResponseFormat()))
|| GetDataAvailabilityConstants.NS_GDA_20.equals(request.getNamespace()) || isForceGDAv20Response();
}
private List checkForDuplictation(List dataAvailabilityValues) {
List checked = Lists.newLinkedList();
for (DataAvailability dataAvailability : dataAvailabilityValues) {
if (checked.isEmpty()) {
checked.add(dataAvailability);
} else {
boolean notDuplicated = true;
for (DataAvailability checkedDA : checked) {
if (dataAvailability.equals(checkedDA)) {
checkedDA.getPhenomenonTime().extendToContain(dataAvailability.getPhenomenonTime());
notDuplicated = false;
}
}
if (notDuplicated) {
checked.add(dataAvailability);
}
}
}
return checked;
}
private ReferenceType getProcedureReference(Dataset entity, Map procedures) {
String identifier = entity.getProcedure().getIdentifier();
if (!procedures.containsKey(identifier)) {
ReferenceType referenceType = new ReferenceType(identifier);
if (entity.getProcedure().isSetName()) {
referenceType.setTitle(entity.getProcedure().getName());
}
procedures.put(identifier, referenceType);
}
return procedures.get(identifier);
}
private ReferenceType getObservedPropertyReference(Dataset entity, Map observableProperties) {
String identifier = entity.getPhenomenon().getIdentifier();
if (!observableProperties.containsKey(identifier)) {
ReferenceType referenceType = new ReferenceType(identifier);
if (entity.getPhenomenon().isSetName()) {
referenceType.setTitle(entity.getPhenomenon().getName());
}
observableProperties.put(identifier, referenceType);
}
return observableProperties.get(identifier);
}
private ReferenceType getFeatureOfInterestReference(Dataset entity, Map featuresOfInterest) {
String identifier = entity.getFeature().getIdentifier();
if (!featuresOfInterest.containsKey(identifier)) {
ReferenceType referenceType = new ReferenceType(identifier);
if (entity.getFeature().isSetName() ) {
referenceType.setTitle(entity.getFeature().getName());
}
featuresOfInterest.put(identifier, referenceType);
}
return featuresOfInterest.get(identifier);
}
private ReferenceType getOfferingReference(Dataset entity, Map offerings){
String identifier = entity.getOffering().getIdentifier();
if (!offerings.containsKey(identifier)) {
ReferenceType referenceType = new ReferenceType(identifier);
if (entity.getOffering().isSetName()) {
referenceType.setTitle(entity.getOffering().getName());
}
offerings.put(identifier, referenceType);
}
return offerings.get(identifier);
}
/**
* Check if optional count should be added
*
* @param request
* GetDataAvailability request
* @return true, if optional count should be added
*/
private boolean isShowCount(GetDataAvailabilityRequest request) {
if (request.hasExtension(SHOW_COUNT)) {
return request.getBooleanExtension(SHOW_COUNT);
}
return isForceValueCount();
}
/**
* Check if result times should be added
*
* @param request
* GetDataAvailability request
* @return true, if result times should be added
*/
private boolean isIncludeResultTime(GetDataAvailabilityRequest request) {
if (request.hasExtension(INCLUDE_RESULT_TIMES)) {
return request.getBooleanExtension(INCLUDE_RESULT_TIMES)
|| hasPhenomenonTimeFilter(request.getExtensions());
}
return false;
}
/**
* Check if extensions contains a temporal filter with valueReference
* phenomenonTime
*
* @param extensions
* Extensions to check
* @return true, if extensions contains a temporal filter with
* valueReference phenomenonTime
*/
private boolean hasPhenomenonTimeFilter(Extensions extensions) {
boolean hasFilter = false;
for (Extension extension : extensions.getExtensions()) {
if (extension.getValue() instanceof TemporalFilter) {
TemporalFilter filter = (TemporalFilter) extension.getValue();
if (SosConstants.PHENOMENON_TIME_VALUE_REFERENCE.equals(filter.getValueReference())) {
hasFilter = true;
}
}
}
return hasFilter;
}
private FormatDescriptor getFormatDescriptor(GDARequestContext context, Dataset entity) {
return new FormatDescriptor(
new ProcedureDescriptionFormatDescriptor(
entity.getProcedure().getFormat().getFormat()),
getObservationFormatDescriptors(entity.getOffering(), context));
}
private Set getObservationFormatDescriptors(OfferingEntity entity, GDARequestContext context) {
Map> responsFormatObservationTypesMap = Maps.newHashMap();
for (FormatEntity observationType : entity.getObservationTypes()) {
Set responseFormats = getResponseFormatsForObservationType(observationType.getFormat(), context.getRequest().getService(), context.getRequest().getVersion());
for (String responseFormat : responseFormats) {
if (responsFormatObservationTypesMap.containsKey(responseFormat)) {
responsFormatObservationTypesMap.get(responseFormat).add(observationType.getFormat());
} else {
responsFormatObservationTypesMap.put(responseFormat, Sets.newHashSet(observationType.getFormat()));
}
}
}
Set formatDescriptors = Sets.newHashSet();
for (String responsFormat : responsFormatObservationTypesMap.keySet()) {
formatDescriptors.add(new ObservationFormatDescriptor(responsFormat, responsFormatObservationTypesMap.get(responsFormat)));
}
return formatDescriptors;
}
private boolean addParentDataAvailabilityIfMissing(Set parentDataAvailabilities,
DataAvailability childDataAvailability, ReferenceType offering) {
boolean notContained = true;
for (DataAvailability parentDataAvailability : parentDataAvailabilities) {
if (parentDataAvailability.sameConstellation(childDataAvailability)) {
notContained = false;
}
}
if (notContained) {
parentDataAvailabilities.add(childDataAvailability.copy());
}
return notContained;
}
public class GDARequestContext {
private GetDataAvailabilityRequest request;
private List dataAvailabilityValues = Lists.newArrayList();
private Map procedures = new HashMap<>();
private Map observableProperties = new HashMap<>();
private Map featuresOfInterest = new HashMap<>();
private Map offerings = new HashMap<>();
public GDARequestContext(GetDataAvailabilityRequest request) {
this.request = request;
}
public GetDataAvailabilityRequest getRequest() {
return request;
}
public Map getFeaturesOfInterest() {
return featuresOfInterest;
}
public Map getObservableProperties() {
return observableProperties;
}
public Map getProcedures() {
return procedures;
}
public Map getOfferings() {
return offerings;
}
public GDARequestContext setDataAvailabilityList(List dataAvailabilityValues) {
this.dataAvailabilityValues.clear();
return addDataAvailabilities(dataAvailabilityValues);
}
public GDARequestContext addDataAvailability(DataAvailability dataAvailability) {
if (dataAvailability != null) {
this.dataAvailabilityValues.add(dataAvailability);
}
return this;
}
public GDARequestContext addDataAvailabilities(Collection dataAvailabilityValues) {
if (dataAvailabilityValues != null) {
this.dataAvailabilityValues.addAll(dataAvailabilityValues);
}
return this;
}
public List getDataAvailabilityList() {
return Lists.newArrayList(dataAvailabilityValues);
}
public boolean hasDataAvailability(String requestedOffering) {
for (DataAvailability dataAvailability : dataAvailabilityValues) {
if (requestedOffering.equals(dataAvailability.getOfferingString())) {
return true;
}
}
return false;
}
public Set getDataAvailability(String offering) {
Set das = Sets.newHashSet();
for (DataAvailability dataAvailability : dataAvailabilityValues) {
if (offering.equals(dataAvailability.getOfferingString())) {
das.add(dataAvailability);
}
}
return das;
}
public boolean isSetDataAvailabilityList() {
return getDataAvailabilityList() != null && !getDataAvailabilityList().isEmpty();
}
}
}