org.geotools.data.shapefile.shp

Class ShapefileWriter

Object

ShapefileWriter

public class ShapefileWriter
extends Object

ShapefileWriter allows for the storage of geometries in esris shp format. During writing, an index will also be created. To create a ShapefileWriter, do something like
GeometryCollection geoms; File shp = new File("myshape.shp"); File shx = new File("myshape.shx"); ShapefileWriter writer = new ShapefileWriter( shp.getChannel(),shx.getChannel() ); writer.write(geoms,ShapeType.ARC); This example assumes that each shape in the collection is a LineString.

Author:

jamesm, aaime, Ian Schneider

See Also:

ShapefileDataStore

Constructor Summary

Constructors

Constructor and Description
ShapefileWriter(FileChannel shpChannel, FileChannel shxChannel) Creates a new instance of ShapeFileWriter

Method Summary

Modifier and Type	Method and Description
void	close() Close the underlying Channels.
void	skipHeaders() Allocate internal buffers and position the channels to the beginning or the record section of the shapefile.
void	write(GeometryCollection geometries, ShapeType type) Bulk write method for writing a collection of (hopefully) like geometries of the given ShapeType.
void	writeGeometry(Geometry g) Write a single Geometry to this shapefile.
void	writeHeaders(Envelope bounds, ShapeType type, int numberOfGeometries, int fileLength) Write the headers for this shapefile including the bounds, shape type, the number of geometries and the total fileLength (in actual bytes, NOT 16 bit words).
protected int	writeNullGeometry()

Methods inherited from class Object

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

Constructor Detail

ShapefileWriter

public ShapefileWriter(FileChannel shpChannel,
                       FileChannel shxChannel)
                throws IOException

Creates a new instance of ShapeFileWriter

Throws:

IOException

Method Detail

writeHeaders

public void writeHeaders(Envelope bounds,
                         ShapeType type,
                         int numberOfGeometries,
                         int fileLength)
                  throws IOException

Write the headers for this shapefile including the bounds, shape type, the number of geometries and the total fileLength (in actual bytes, NOT 16 bit words).

Throws:

IOException

skipHeaders

public void skipHeaders()
                 throws IOException

Allocate internal buffers and position the channels to the beginning or the record section of the shapefile. The headers MUST be rewritten after this operation, or the file may be corrupt...

Throws:

IOException

writeGeometry

public void writeGeometry(Geometry g)
                   throws IOException

Write a single Geometry to this shapefile. The Geometry must be compatable with the ShapeType assigned during the writing of the headers.

Throws:

IOException

writeNullGeometry

protected int writeNullGeometry()
                         throws IOException

Throws:

IOException

close

public void close()
           throws IOException

Close the underlying Channels.

Throws:

IOException

write

public void write(GeometryCollection geometries,
                  ShapeType type)
           throws IOException,
                  ShapefileException

Bulk write method for writing a collection of (hopefully) like geometries of the given ShapeType.

Throws:

IOException

ShapefileException