Package org.sensorhub.api.datastore.obs

Class EmptyObsStore

java.lang.Object

org.sensorhub.impl.datastore.ReadOnlyDataStore<K,V,VF,Q>

org.sensorhub.impl.datastore.EmptyDataStore<BigId,IObsData,IObsStore.ObsField,ObsFilter>

org.sensorhub.api.datastore.obs.EmptyObsStore

All Implemented Interfaces:

Map<BigId,IObsData>, IDataStore<BigId,IObsData,IObsStore.ObsField,ObsFilter>, IObsStore

public class EmptyObsStore
extends org.sensorhub.impl.datastore.EmptyDataStore<BigId,IObsData,IObsStore.ObsField,ObsFilter>
implements IObsStore

Helper class to implement databases that don't support all datastores

Since:

Jun 22, 2023

Nested Class Summary

Nested classes/interfaces inherited from interface org.sensorhub.api.datastore.obs.IObsStore

IObsStore.ObsField

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K extends Object,V extends Object>

Field Summary

Fields inherited from class org.sensorhub.impl.datastore.ReadOnlyDataStore

READ_ONLY_ERROR_MSG

Constructor Summary

Constructors

Constructor	Description
EmptyObsStore()

Method Summary

Modifier and Type	Method	Description
BigId	add(IObsData obs)	Add an observation to the datastore
IDataStreamStore	getDataStreams()
Stream<ObsStats>	getStatistics(ObsStatsQuery query)	Select statistics for systems and FOI matching the query
void	linkTo(IFoiStore foiStore)	Link this store to a feature of interest store to enable JOIN queries

Methods inherited from class org.sensorhub.impl.datastore.EmptyDataStore

get, getDatastoreName, selectEntries

Methods inherited from class org.sensorhub.impl.datastore.ReadOnlyDataStore

backup, clear, commit, isReadOnly, isReadSupported, isWriteSupported, put, remove, restore

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.sensorhub.api.datastore.IDataStore

backup, commit, containsKey, containsValue, countMatchingEntries, entrySet, getDatastoreName, getNumRecords, isEmpty, isReadOnly, keySet, putAll, removeEntries, restore, select, select, select, selectEntries, selectEntries, selectEntries, selectKeys, size, values

Methods inherited from interface org.sensorhub.api.datastore.obs.IObsStore

filterBuilder, selectAllFilter, selectObservedFois, selectResults

Methods inherited from interface java.util.Map

clear, compute, computeIfAbsent, computeIfPresent, equals, forEach, get, getOrDefault, hashCode, merge, put, putIfAbsent, remove, remove, replace, replace, replaceAll

Constructor Details

EmptyObsStore

public EmptyObsStore()

Method Details

getDataStreams

public IDataStreamStore getDataStreams()

Specified by:

getDataStreams in interface IObsStore

Returns:

Interface to manage data streams

add

public BigId add(IObsData obs)

Description copied from interface: IObsStore

Add an observation to the datastore

Specified by:

add in interface IObsStore

Returns:

The auto-generated ID

getStatistics

public Stream<ObsStats> getStatistics(ObsStatsQuery query)

Description copied from interface: IObsStore

Select statistics for systems and FOI matching the query

Specified by:

getStatistics in interface IObsStore

Parameters:

query - filter to select desired systems and FOIs

Returns:

stream of statistics buckets. Each item represents statistics for observations collected for a combination of system, feature of interest, and result time.

linkTo

public void linkTo(IFoiStore foiStore)

Description copied from interface: IObsStore

Link this store to a feature of interest store to enable JOIN queries

Specified by:

linkTo in interface IObsStore