org.openstreetmap.josm.data.osm
Class DataSet.IdHash

java.lang.Object
  org.openstreetmap.josm.data.osm.DataSet.IdHash

All Implemented Interfaces:

Hash<PrimitiveId,OsmPrimitive>

Enclosing class:

DataSet

private static class DataSet.IdHash
extends java.lang.Object
implements Hash<PrimitiveId,OsmPrimitive>

Constructor Summary

private

DataSet.IdHash()

Method Summary

boolean	equals(PrimitiveId key, OsmPrimitive value) Compare two instances for semantic or lookup equality.
int	getHashCode(PrimitiveId k) Get hashcode for given instance, based on some inner state of the instance.

Methods inherited from class java.lang.Object

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

Constructor Detail

DataSet.IdHash

private DataSet.IdHash()

Method Detail

getHashCode

public int getHashCode(PrimitiveId k)

Description copied from interface: Hash

Get hashcode for given instance, based on some inner state of the instance. The returned hashcode should remain constant over the time, so it should be based on some instance invariant.

Specified by:

getHashCode in interface Hash<PrimitiveId,OsmPrimitive>

Parameters:

k - the object to compute hashcode for

Returns:

computed hashcode

equals

public boolean equals(PrimitiveId key,
                      OsmPrimitive value)

Description copied from interface: Hash

Compare two instances for semantic or lookup equality. For use cases where it compares different types, refer to Storage.

Specified by:

equals in interface Hash<PrimitiveId,OsmPrimitive>

Parameters:

key - the object to compare

value - the object to compare

Returns:

true if the objects are semantically equivalent, or if k uniquely identifies t in given class.