Package com.mapbox.geojson

Class GeometryCollection

java.lang.Object

com.mapbox.geojson.GeometryCollection

All Implemented Interfaces:

GeoJson, Geometry, Serializable

public final class GeometryCollection
extends Object
implements Geometry

A GeoJson object with TYPE "GeometryCollection" is a Geometry object.

A GeometryCollection has a member with the name "geometries". The value of "geometries" is a List Each element of this list is a GeoJson Geometry object. It is possible for this list to be empty.

Unlike the other geometry types, a GeometryCollection can be a heterogeneous composition of smaller Geometry objects. For example, a Geometry object in the shape of a lowercase roman "i" can be composed of one point and one LineString.

GeometryCollections have a different syntax from single TYPE Geometry objects (Point, LineString, and Polygon) and homogeneously typed multipart Geometry objects (MultiPoint, MultiLineString, and MultiPolygon) but have no different semantics. Although a GeometryCollection object has no "coordinates" member, it does have coordinates: the coordinates of all its parts belong to the collection. The "geometries" member of a GeometryCollection describes the parts of this composition. Implementations SHOULD NOT apply any additional semantics to the "geometries" array.

To maximize interoperability, implementations SHOULD avoid nested GeometryCollections. Furthermore, GeometryCollections composed of a single part or a number of parts of a single TYPE SHOULD be avoided when that single part or a single object of multipart TYPE (MultiPoint, MultiLineString, or MultiPolygon) could be used instead.

An example of a serialized GeometryCollections given below:

 {
   "TYPE": "GeometryCollection",
   "geometries": [{
     "TYPE": "Point",
     "coordinates": [100.0, 0.0]
   }, {
     "TYPE": "LineString",
     "coordinates": [
       [101.0, 0.0],
       [102.0, 1.0]
     ]
   }]
 }
 

Since:

1.0.0

See Also:

• Serialized Form

Method Summary

Modifier and Type	Method	Description
BoundingBox	bbox()	A Feature Collection might have a member named bbox to include information on the coordinate range for it's Features.
boolean	equals(Object obj)
static GeometryCollection	fromGeometries(List<Geometry> geometries)	Create a new instance of this class by giving the collection a list of Geometry.
static GeometryCollection	fromGeometries(List<Geometry> geometries, BoundingBox bbox)	Create a new instance of this class by giving the collection a list of Geometry.
static GeometryCollection	fromGeometry(Geometry geometry)	Create a new instance of this class by giving the collection a single GeoJSON Geometry.
static GeometryCollection	fromGeometry(Geometry geometry, BoundingBox bbox)	Create a new instance of this class by giving the collection a single GeoJSON Geometry.
static GeometryCollection	fromJson(String json)	Create a new instance of this class by passing in a formatted valid JSON String.
List<Geometry>	geometries()	This provides the list of geometry making up this Geometry Collection.
int	hashCode()
String	toJson()	This takes the currently defined values found inside this instance and converts it to a GeoJson string.
String	toString()
String	type()	This describes the TYPE of GeoJson this object is, thus this will always return GeometryCollection.
static com.google.gson.TypeAdapter<GeometryCollection>	typeAdapter(com.google.gson.Gson gson)	Gson TYPE adapter for parsing Gson to this class.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Details

fromJson

public static GeometryCollection fromJson(String json)

Create a new instance of this class by passing in a formatted valid JSON String. If you are creating a GeometryCollection object from scratch it is better to use one of the other provided static factory methods such as fromGeometries(List).

Parameters:

json - a formatted valid JSON string defining a GeoJson Geometry Collection

Returns:

a new instance of this class defined by the values passed inside this static factory method

Since:

1.0.0

fromGeometries

public static GeometryCollection fromGeometries(@NonNull
 List<Geometry> geometries)

Create a new instance of this class by giving the collection a list of Geometry.

Parameters:

geometries - a non-null list of geometry which makes up this collection

Returns:

a new instance of this class defined by the values passed inside this static factory method

Since:

1.0.0

fromGeometries

public static GeometryCollection fromGeometries(@NonNull
 List<Geometry> geometries,
 @Nullable
 BoundingBox bbox)

Create a new instance of this class by giving the collection a list of Geometry.

Parameters:

geometries - a non-null list of geometry which makes up this collection

bbox - optionally include a bbox definition as a double array

Returns:

a new instance of this class defined by the values passed inside this static factory method

Since:

1.0.0

fromGeometry

public static GeometryCollection fromGeometry(@NonNull
 Geometry geometry)

Create a new instance of this class by giving the collection a single GeoJSON Geometry.

Parameters:

geometry - a non-null object of type geometry which makes up this collection

Returns:

a new instance of this class defined by the values passed inside this static factory method

Since:

3.0.0

fromGeometry

public static GeometryCollection fromGeometry(@NonNull
 Geometry geometry,
 @Nullable
 BoundingBox bbox)

Create a new instance of this class by giving the collection a single GeoJSON Geometry.

Parameters:

geometry - a non-null object of type geometry which makes up this collection

bbox - optionally include a bbox definition as a double array

Returns:

a new instance of this class defined by the values passed inside this static factory method

Since:

3.0.0

type

@NonNull
public String type()

This describes the TYPE of GeoJson this object is, thus this will always return GeometryCollection.

Specified by:

type in interface GeoJson

Returns:

a String which describes the TYPE of geometry, for this object it will always return GeometryCollection

Since:

1.0.0

bbox

@Nullable
public BoundingBox bbox()

A Feature Collection might have a member named bbox to include information on the coordinate range for it's Features. The value of the bbox member MUST be a list of size 2*n where n is the number of dimensions represented in the contained feature geometries, with all axes of the most southwesterly point followed by all axes of the more northeasterly point. The axes order of a bbox follows the axes order of geometries.

Specified by:

bbox in interface GeoJson

Returns:

a list of double coordinate values describing a bounding box

Since:

3.0.0

geometries

@NonNull
public List<Geometry> geometries()

This provides the list of geometry making up this Geometry Collection. Note that if the Geometry Collection was created through fromJson(String) this list could be null. Otherwise, the list can't be null but the size of the list can equal 0.

Returns:

a list of Geometry which make up this Geometry Collection

Since:

1.0.0

toJson

public String toJson()

This takes the currently defined values found inside this instance and converts it to a GeoJson string.

Specified by:

toJson in interface GeoJson

Returns:

a JSON string which represents this GeometryCollection

Since:

1.0.0

typeAdapter

public static com.google.gson.TypeAdapter<GeometryCollection> typeAdapter(com.google.gson.Gson gson)

Gson TYPE adapter for parsing Gson to this class.

Parameters:

gson - the built Gson object

Returns:

the TYPE adapter for this class

Since:

3.0.0

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object