com.bbn.openmap.layer.shape
Class ShapeIndex

java.lang.Object
  |
  +--com.bbn.openmap.layer.shape.ShapeUtils
        |
        +--com.bbn.openmap.layer.shape.ShapeIndex

All Implemented Interfaces:

ShapeConstants

public class ShapeIndex

extends ShapeUtils

A class representing a shape index file.

Currently this class has limited capabilities. It can dump the index information to stdout. This is useful for verification of a spatial index.

Usage

java com.bbn.openmap.shape.ShapeIndex file.shx

Dumps spatial index information, excluding bounding boxes to stdout. Useful for comparing to a shape index.

To Do

• Generate an index from a shape file

Version:

$Revision: 1.3.2.1 $ $Date: 2004/10/14 18:27:17 $

Author:

Tom Mitchell

See Also:

SpatialIndex

Field Summary

static int	SHAPE_INDEX_RECORD_LENGTH Size of the shape index record, value is 8 bytes.
protected java.io.RandomAccessFile	shx The shape index file.

Fields inherited from interface com.bbn.openmap.dataAccess.shape.ShapeConstants

DBF_CHARACTER, DBF_DATE, DBF_LOGICAL, DBF_MEMO, DBF_NUMERIC, DBF_TYPE_CHARACTER, DBF_TYPE_DATE, DBF_TYPE_LOGICAL, DBF_TYPE_MEMO, DBF_TYPE_NUMERIC, PARAM_DBF, PARAM_SHP, PARAM_SHX, SHAPE_DBF_DASHPATTERN, SHAPE_DBF_DASHPHASE, SHAPE_DBF_DESCRIPTION, SHAPE_DBF_FILLCOLOR, SHAPE_DBF_LINECOLOR, SHAPE_DBF_LINEWIDTH, SHAPE_DBF_SELECTCOLOR, SHAPE_FILE_HEADER_LENGTH, SHAPE_FILE_RECORD_HEADER_LENGTH, SHAPE_TYPE_ARC, SHAPE_TYPE_MULTIPOINT, SHAPE_TYPE_NULL, SHAPE_TYPE_POINT, SHAPE_TYPE_POLYGON, SHAPE_TYPE_POLYLINE

Constructor Summary

ShapeIndex(java.lang.String shxFilename)
Opens a shape index file for reading.

Method Summary

void	dumpIndex() Displays the contents of this index.
static void	main(java.lang.String[] args) The driver for the command line interface.

Methods inherited from class com.bbn.openmap.layer.shape.ShapeUtils

readBEInt, readBox, readLEDouble, readLEInt, readLEInt, readLELong, readPoint, writeBEInt, writeBox, writeLEDouble, writeLEInt, writeLELong, writePoint

Methods inherited from class java.lang.Object

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

Field Detail

SHAPE_INDEX_RECORD_LENGTH

public static final int SHAPE_INDEX_RECORD_LENGTH

Size of the shape index record, value is 8 bytes.

See Also:

Constant Field Values

shx

protected java.io.RandomAccessFile shx

The shape index file.

Constructor Detail

ShapeIndex

public ShapeIndex(java.lang.String shxFilename)
           throws java.io.IOException

Opens a shape index file for reading.

Parameters:

shxFilename - the name of the spatial index file

Throws:

java.io.IOException - if something goes wrong opening the file

Method Detail

dumpIndex

public void dumpIndex()
               throws java.io.IOException

Displays the contents of this index.

Throws:

java.io.IOException - if something goes wrong reading the file

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

The driver for the command line interface. Reads the command line arguments and executes appropriate calls.

See the file documentation for usage.

Parameters:

args - the command line arguments

Throws:

java.io.IOException - if something goes wrong reading or writing the file