com.vividsolutions.jts.index

Interface SpatialIndex

All Known Implementing Classes:

Quadtree, STRtree

public interface SpatialIndex

The basic operations supported by classes implementing spatial index algorithms.

A spatial index typically provides a primary filter for range rectangle queries. A secondary filter is required to test for exact intersection. The secondary filter may consist of other kinds of tests, such as testing other spatial relationships.

Version:

1.7

Method Summary

Methods

Modifier and Type	Method and Description
void	insert(Envelope itemEnv, Object item) Adds a spatial item with an extent specified by the given Envelope to the index
List	query(Envelope searchEnv) Queries the index for all items whose extents intersect the given search Envelope Note that some kinds of indexes may also return objects which do not in fact intersect the query envelope.
void	query(Envelope searchEnv, ItemVisitor visitor) Queries the index for all items whose extents intersect the given search Envelope, and applies an ItemVisitor to them.
boolean	remove(Envelope itemEnv, Object item) Removes a single item from the tree.

Method Detail

insert

void insert(Envelope itemEnv,
          Object item)

Adds a spatial item with an extent specified by the given Envelope to the index

query

List query(Envelope searchEnv)

Queries the index for all items whose extents intersect the given search Envelope Note that some kinds of indexes may also return objects which do not in fact intersect the query envelope.

Parameters:

searchEnv - the envelope to query for

Returns:

a list of the items found by the query

query

void query(Envelope searchEnv,
         ItemVisitor visitor)

Queries the index for all items whose extents intersect the given search Envelope, and applies an ItemVisitor to them. Note that some kinds of indexes may also return objects which do not in fact intersect the query envelope.

Parameters:

searchEnv - the envelope to query for

visitor - a visitor object to apply to the items found

remove

boolean remove(Envelope itemEnv,
             Object item)

Removes a single item from the tree.

Parameters:

itemEnv - the Envelope of the item to remove

item - the item to remove

Returns:

true if the item was found