Package org.heigit.ohsome.oshdb.osh

Class OSHEntities

java.lang.Object

org.heigit.ohsome.oshdb.osh.OSHEntities

public final class OSHEntities
extends Object

Method Summary

Modifier and Type	Method	Description
static OSMEntity	getByTimestamp(OSHEntity osh, OSHDBTimestamp timestamp)	Returns the OSM entity ("version") of the OSH entity which was current at the given timestamp.
static <T extends OSMEntity> List<T>	toList(Iterable<T> versions)	Collects all versions of an OSH entity from an iterable (OSHEntity.getVersions()) into a list.
static <T extends OSMEntity,R> List<R>	toList(Iterable<T> versions, Function<T,R> transformer)	Collects all versions of an OSH entity from an iterable (OSHEntity.getVersions()) into a list after applying a transformation function.

Methods inherited from class java.lang.Object

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

Method Detail

toList

public static <T extends OSMEntity> List<T> toList(Iterable<T> versions)

Collects all versions of an OSH entity from an iterable (OSHEntity.getVersions()) into a list.

Type Parameters:

T - the type of the OSM entities: OSMNode, OSMWay or OSMRelation

Parameters:

versions - the versions of an OSH entity, as returned from OSHEntity.getVersions()

Returns:

all versions of the OSH entity as a list, with the most recent version first.

toList

public static <T extends OSMEntity,R> List<R> toList(Iterable<T> versions,
                                                           Function<T,R> transformer)

Collects all versions of an OSH entity from an iterable (OSHEntity.getVersions()) into a list after applying a transformation function.

Type Parameters:

T - the type of the OSM entities: OSMNode, OSMWay or OSMRelation

R - the type of the returned list's items

Parameters:

versions - the versions of an OSH entity, as returned from OSHEntity.getVersions()

transformer - a function which is called for each version

Returns:

all versions of the OSH entity as a list, with the most recent version first.

getByTimestamp

public static OSMEntity getByTimestamp(OSHEntity osh,
                                       OSHDBTimestamp timestamp)

Returns the OSM entity ("version") of the OSH entity which was current at the given timestamp.

Parameters:

osh - the OSH entity to process.

timestamp - the timestamp for which to return the state of the OSH entity.

Returns:

the version (OSM entity) of the OSH entity which was current at the given timestamp or null if none could be found.