ItemDistance class abstract
A function method which computes the distance between two {@link ItemBoundable}s in an {@link STRtree}. Used for Nearest Neighbour searches.
To make a distance function suitable for querying a single index tree via {@link STRtree#nearestNeighbour(ItemDistance)} , the function should have a non-zero reflexive distance. That is, if the two arguments are the same object, the distance returned should be non-zero. If it is required that only pairs of distinct items be returned, the distance function must be anti-reflexive, and must return {@link Double#MAX_VALUE} for identical arguments.
@author Martin Davis
- Implementers
Constructors
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
distance(
ItemBoundable item1, ItemBoundable item2) → double - Computes the distance between two items.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited