org.geotools.geopkg

Class GeoPackage

Object

GeoPackage

public class GeoPackage
extends Object

Provides access to a GeoPackage database.

Author:

Justin Deoliveira, OpenGeo, Niels Charlier

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	GeoPackage.DataType

Field Summary

Fields

Modifier and Type	Field and Description
static String	DATA_COLUMN_CONSTRAINTS
static String	EXTENSIONS
static String	GEOMETRY_COLUMNS
static String	GEOPACKAGE_CONTENTS
static String	METADATA
static String	METADATA_REFERENCE
static String	RASTER_COLUMNS
static String	SPATIAL_INDEX
static String	SPATIAL_REF_SYS
static String	TILE_MATRIX_METADATA
static String	TILE_MATRIX_SET
protected GeoPkgGeomWriter.Configuration	writerConfig

Constructor Summary

Constructors

Constructor and Description
GeoPackage() Creates a new empty GeoPackage, generating a new file.
GeoPackage(File file) Creates a GeoPackage from an existing file.
GeoPackage(File file, String user, String passwd) Creates a GeoPackage from an existing file specifying database credentials.

Method Summary

Modifier and Type	Method and Description
void	add(FeatureEntry entry, SimpleFeatureCollection collection) Adds a new feature dataset to the geopackage.
void	add(FeatureEntry entry, SimpleFeatureSource source, Filter filter) Adds a new feature dataset to the geopackage.
void	add(TileEntry entry, Tile tile) Adds a tile to the geopackage.
static void	addCRS(Connection cx, int srid, String srsName, String organization, int organizationCoordSysId, String definition, String description)
void	addCRS(CoordinateReferenceSystem crs, String auth, int srid) Adds a crs to the geopackage, registering it in the spatial_ref_sys table.
void	addCRS(int srid) Adds an epsg crs to the geopackage, registering it in the spatial_ref_sys table.
protected static void	addDefaultSpatialReferences(Connection cx)
void	close() Closes the geopackage database connection.
List<Entry>	contents() Returns list of contents of the geopackage.
void	create(FeatureEntry entry, SimpleFeatureType schema) Creates a new feature entry in the geopackage.
void	create(TileEntry entry) Creates a new tile entry in the geopackage.
void	createSpatialIndex(FeatureEntry e) Create a spatial index
FeatureEntry	feature(String name) Looks up a feature entry by name.
List<FeatureEntry>	features() Lists all the feature entries in the geopackage.
DataSource	getDataSource() The database data source.
File	getFile() The underlying database file.
protected String	getSpatialIndexName(FeatureEntry entry)
int	getTileBound(TileEntry entry, int zoom, boolean isMax, boolean isRow) Retrieve tile boundaries (min row, max row, min column and max column) for a particular zoom level, available in the actual data
GeoPkgGeomWriter.Configuration	getWriterConfiguration()
boolean	hasSpatialIndex(FeatureEntry entry) Verifies if a spatial index is present
void	init() Initializes the geopackage database.
SimpleFeatureReader	reader(FeatureEntry entry, Filter filter, Transaction tx) Returns a reader for the contents of a feature dataset.
TileReader	reader(TileEntry entry, Integer lowZoom, Integer highZoom, Integer lowCol, Integer highCol, Integer lowRow, Integer highRow) Retrieve tiles within certain zooms and column/row boundaries
Set<Identifier>	searchSpatialIndex(FeatureEntry entry, Double minX, Double minY, Double maxX, Double maxY) Searches a spatial index.
TileEntry	tile(String name) Looks up a tile entry by name.
List<TileEntry>	tiles() Lists all the tile entries in the geopackage.
SimpleFeatureWriter	writer(FeatureEntry entry, boolean append, Filter filter, Transaction tx) Returns a writer used to modify or add to the contents of a feature dataset.

Methods inherited from class Object

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

Field Detail

GEOPACKAGE_CONTENTS

public static final String GEOPACKAGE_CONTENTS

See Also:

Constant Field Values

GEOMETRY_COLUMNS

public static final String GEOMETRY_COLUMNS

See Also:

Constant Field Values

SPATIAL_REF_SYS

public static final String SPATIAL_REF_SYS

See Also:

Constant Field Values

RASTER_COLUMNS

public static final String RASTER_COLUMNS

See Also:

Constant Field Values

TILE_MATRIX_METADATA

public static final String TILE_MATRIX_METADATA

See Also:

Constant Field Values

METADATA

public static final String METADATA

See Also:

Constant Field Values

METADATA_REFERENCE

public static final String METADATA_REFERENCE

See Also:

Constant Field Values

TILE_MATRIX_SET

public static final String TILE_MATRIX_SET

See Also:

Constant Field Values

DATA_COLUMN_CONSTRAINTS

public static final String DATA_COLUMN_CONSTRAINTS

See Also:

Constant Field Values

EXTENSIONS

public static final String EXTENSIONS

See Also:

Constant Field Values

SPATIAL_INDEX

public static final String SPATIAL_INDEX

See Also:

Constant Field Values

writerConfig

protected GeoPkgGeomWriter.Configuration writerConfig

Constructor Detail

GeoPackage

public GeoPackage()
           throws IOException

Creates a new empty GeoPackage, generating a new file.

Throws:

IOException

GeoPackage

public GeoPackage(File file)
           throws IOException

Creates a GeoPackage from an existing file.

This constructor assumes no credentials are required to connect to the database.

Throws:

IOException

GeoPackage

public GeoPackage(File file,
                  String user,
                  String passwd)
           throws IOException

Creates a GeoPackage from an existing file specifying database credentials.

Throws:

IOException

Method Detail

getWriterConfiguration

public GeoPkgGeomWriter.Configuration getWriterConfiguration()

getFile

public File getFile()

The underlying database file.

Note: this value may be null depending on how the geopackage was initialized.

getDataSource

public DataSource getDataSource()

The database data source.

init

public void init()
          throws IOException

Initializes the geopackage database.

This method creates all the necessary metadata tables.

Throws:

IOException

close

public void close()

Closes the geopackage database connection.

The application should always call this method when done with a geopackage to prevent connection leakage.

addCRS

public void addCRS(int srid)
            throws IOException

Adds an epsg crs to the geopackage, registering it in the spatial_ref_sys table.

This method will look up the srid in the local epsg database. Use #addCRS(CoordinateReferenceSystem, int) to specify an explicit CRS, authority, code entry.

Throws:

IOException

addDefaultSpatialReferences

protected static void addDefaultSpatialReferences(Connection cx)
                                           throws SQLException

Throws:

SQLException

addCRS

public static void addCRS(Connection cx,
                          int srid,
                          String srsName,
                          String organization,
                          int organizationCoordSysId,
                          String definition,
                          String description)
                   throws IOException

Throws:

IOException

addCRS

public void addCRS(CoordinateReferenceSystem crs,
                   String auth,
                   int srid)
            throws IOException

Adds a crs to the geopackage, registering it in the spatial_ref_sys table.

Parameters:

crs - The crs to add.

auth - The authority code, example: epsg

srid - The spatial reference system id.

Throws:

IOException

contents

public List<Entry> contents()

Returns list of contents of the geopackage.

features

public List<FeatureEntry> features()
                            throws IOException

Lists all the feature entries in the geopackage.

Throws:

IOException

feature

public FeatureEntry feature(String name)
                     throws IOException

Looks up a feature entry by name.

Parameters:

name - THe name of the feature entry.

Returns:

The entry, or null if no such entry exists.

Throws:

IOException

create

public void create(FeatureEntry entry,
                   SimpleFeatureType schema)
            throws IOException

Creates a new feature entry in the geopackage.

The resulting feature dataset will be empty. The #writer(FeatureEntry, boolean, Transaction) method returns a writer object that can be used to populate the dataset.

Parameters:

entry - Contains metadata about the feature entry.

schema - The schema of the feature dataset.

Throws:

IOException - Any errors occurring while creating the new feature entry.

add

public void add(FeatureEntry entry,
                SimpleFeatureCollection collection)
         throws IOException

Adds a new feature dataset to the geopackage.

Parameters:

entry - Contains metadata about the feature entry.

collection - The simple feature collection to add to the geopackage.

Throws:

IOException - Any errors occurring while adding the new feature dataset.

add

public void add(FeatureEntry entry,
                SimpleFeatureSource source,
                Filter filter)
         throws IOException

Adds a new feature dataset to the geopackage.

Parameters:

entry - Contains metadata about the feature entry.

source - The dataset to add to the geopackage.

filter - Filter specifying what subset of feature dataset to include, may be null to specify no filter.

Throws:

IOException - Any errors occurring while adding the new feature dataset.

writer

public SimpleFeatureWriter writer(FeatureEntry entry,
                                  boolean append,
                                  Filter filter,
                                  Transaction tx)
                           throws IOException

Returns a writer used to modify or add to the contents of a feature dataset.

Parameters:

entry - The feature entry.

append - Flag controlling whether to modify existing contents, or append to the dataset.

filter - Filter determining what subset of dataset to modify, only relevant when append set to false. May be null to specify no filter.

tx - Transaction object, may be null to specify auto commit transaction.

Throws:

IOException

reader

public SimpleFeatureReader reader(FeatureEntry entry,
                                  Filter filter,
                                  Transaction tx)
                           throws IOException

Returns a reader for the contents of a feature dataset.

Parameters:

entry - The feature entry.

filter - Filter Filter determining what subset of dataset to return. May be null to specify no filter.

tx - Transaction object, may be null to specify auto commit transaction.

Throws:

IOException

createSpatialIndex

public void createSpatialIndex(FeatureEntry e)
                        throws IOException

Create a spatial index

Parameters:

e - feature entry to create spatial index for

Throws:

IOException

tiles

public List<TileEntry> tiles()
                      throws IOException

Lists all the tile entries in the geopackage.

Throws:

IOException

tile

public TileEntry tile(String name)
               throws IOException

Looks up a tile entry by name.

Parameters:

name - THe name of the tile entry.

Returns:

The entry, or null if no such entry exists.

Throws:

IOException

create

public void create(TileEntry entry)
            throws IOException

Creates a new tile entry in the geopackage.

Parameters:

entry - The tile entry.

Throws:

IOException

add

public void add(TileEntry entry,
                Tile tile)
         throws IOException

Adds a tile to the geopackage.

Parameters:

entry - The tile metadata entry.

tile - The tile.

Throws:

IOException

reader

public TileReader reader(TileEntry entry,
                         Integer lowZoom,
                         Integer highZoom,
                         Integer lowCol,
                         Integer highCol,
                         Integer lowRow,
                         Integer highRow)
                  throws IOException

Retrieve tiles within certain zooms and column/row boundaries

Parameters:

entry - the tile entry

lowZoom - low zoom boundary

highZoom - high zoom boundary

lowCol - low column boundary

highCol - high column boundary

lowRow - low row boundary

highRow - high row boundary

Returns:

Throws:

IOException

getSpatialIndexName

protected String getSpatialIndexName(FeatureEntry entry)

hasSpatialIndex

public boolean hasSpatialIndex(FeatureEntry entry)
                        throws IOException

Verifies if a spatial index is present

Parameters:

entry - The feature entry.

Returns:

whether this feature entry has a spatial index available.

Throws:

IOException

searchSpatialIndex

public Set<Identifier> searchSpatialIndex(FeatureEntry entry,
                                          Double minX,
                                          Double minY,
                                          Double maxX,
                                          Double maxY)
                                   throws IOException

Searches a spatial index.

Parameters:

entry - The feature entry.

minX - Optional minimum x boundary.

minY - Optional minimum y boundary.

maxX - Optional maximum x boundary.

maxY - Optional maximum y boundary.

Throws:

IOException

getTileBound

public int getTileBound(TileEntry entry,
                        int zoom,
                        boolean isMax,
                        boolean isRow)
                 throws IOException

Retrieve tile boundaries (min row, max row, min column and max column) for a particular zoom level, available in the actual data

Parameters:

entry - The tile entry

zoom - the zoom level

isMax - true for max boundary, false for min boundary

isRow - true for rows, false for columns

Returns:

the min/max column/row of the zoom level available in the data

Throws:

IOException