SpatialIndex (elasticsearch-extend 3.2 API)

All Known Implementing Classes:

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

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	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