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## com.bbn.openmap.layer.shape
Class ShapeFile

    java.lang.Object
      com.bbn.openmap.layer.shape.ShapeUtils
          com.bbn.openmap.layer.shape.ShapeFile

All Implemented Interfaces:
  ShapeConstants

public class ShapeFile
extends ShapeUtils

Class representing an ESRI Shape File.

## Usage:

java com.bbn.openmap.layer.shape.ShapeFile -v shapeFile
  Verifies a shape file.

java com.bbn.openmap.layer.shape.ShapeFile -a destShapeFile srcShapeFile
  Appends records from srcShapeFile to destShapeFile.

java com.bbn.openmap.layer.shape.ShapeFile shapeFile
  Prints information about the header and the number of records.

Version:
  $Revision: 1.2.2.2 $ $Date: 2005/08/09 21:17:47 $
Author:
  Tom Mitchell , Ray Tomlinson, Geoffrey Knauth

Field Summary
`static int` | `DEFAULT_RECORD_BUFFER_SIZE` A default record size.
`protected ESRIBoundingBox` | `fileBounds` Holds the bounds of the file (four doubles).
`protected long` | `fileLength` Holds the length of the file, in bytes.
`protected int` | `fileShapeType` Holds the shape type of the file.
`protected int` | `fileVersion` Holds the version of the file, as an int.
`protected byte[]` | `header` The buffer that holds the 100 byte header.
`protected java.io.RandomAccessFile` | `raf` The read/write class for shape files.
`protected byte[]` | `recBuf` A buffer for the current record's data.
`protected byte[]` | `recHdr` A buffer for current record's header.
`static int` | `SHAPE_FILE_CODE` A Shape File's magic number.
`static int` | `SHAPE_FILE_VERSION` The currently handled version of Shape Files.

Fields inherited from interface com.bbn.openmap.dataAccess.shape.ShapeConstants
`DBF_ATTRIBUTE, 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_BOUNDS_ATTRIBUTE, SHAPE_DBF_DASHPATTERN, SHAPE_DBF_DASHPHASE, SHAPE_DBF_DESCRIPTION, SHAPE_DBF_FILLCOLOR, SHAPE_DBF_INFO_ATTRIBUTE, SHAPE_DBF_LINECOLOR, SHAPE_DBF_LINEWIDTH, SHAPE_DBF_SELECTCOLOR, SHAPE_FILE_HEADER_LENGTH, SHAPE_FILE_RECORD_HEADER_LENGTH, SHAPE_INDEX_ATTRIBUTE, SHAPE_MAX_MEASURE_ATTRIBUTE, SHAPE_MAX_Z_ATTRIBUTE, SHAPE_MEASURE_ATTRIBUTE, SHAPE_MIN_MEASURE_ATTRIBUTE, SHAPE_MIN_Z_ATTRIBUTE, SHAPE_TYPE_ARC, SHAPE_TYPE_MULTIPATCH, SHAPE_TYPE_MULTIPOINT, SHAPE_TYPE_MULTIPOINTM, SHAPE_TYPE_MULTIPOINTZ, SHAPE_TYPE_NULL, SHAPE_TYPE_POINT, SHAPE_TYPE_POINTM, SHAPE_TYPE_POINTZ, SHAPE_TYPE_POLYGON, SHAPE_TYPE_POLYGONM, SHAPE_TYPE_POLYGONZ, SHAPE_TYPE_POLYLINE, SHAPE_TYPE_POLYLINEM, SHAPE_TYPE_POLYLINEZ, SHAPE_Z_ATTRIBUTE`

Constructor Summary
`ShapeFile(java.io.File file)` Construct a `ShapeFile` from the given `File`.
`ShapeFile(java.lang.String name)` Construct a `ShapeFile` from a file name.

Method Summary
`void` | `add(ESRIRecord r)` Adds a record to the end of this file.
`void` | `close()` Closes the shape file and disposes of resources.
`ESRIBoundingBox` | `getBoundingBox()` Returns the bounding box of this shape file.
`long` | `getFileLength()` Returns the length of the file in bytes.
`int` | `getFileVersion()` Returns the version of the file.
`ESRIRecord` | `getNextRecord()` Returns the next record from the shape file as an `ESRIRecord`.
`int` | `getShapeType()` Returns the shape type of the file.
`protected void` | `initHeader()` Reads or writes the header of a Shape file.
`static void` | `main(java.lang.String[] args)` The driver for the command line interface.
`protected void` | `readHeader()` Reads and parses the header of the file.
`void` | `setShapeType(int newShapeType)` Sets the shape type of the file.
`void` | `verify(boolean repair, boolean verbose)` Verifies the contents of a shape file.
`protected void` | `verifyRecordBuffer(int size)` Verifies that the record buffer is big enough to hold the given number of bytes.
`protected void` | `writeHeader()` Writes a blank header into the shape file.

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_FILE_CODE

    public static final int SHAPE_FILE_CODE

  A Shape File's magic number.

  See Also:
    Constant Field Values

### SHAPE_FILE_VERSION

    public static final int SHAPE_FILE_VERSION

  The currently handled version of Shape Files.

  See Also:
    Constant Field Values

### DEFAULT_RECORD_BUFFER_SIZE

    public static final int DEFAULT_RECORD_BUFFER_SIZE

  A default record size. Automatically increased on demand.

  See Also:
    Constant Field Values

### raf

    protected java.io.RandomAccessFile raf

  The read/write class for shape files.

### header

    protected byte[] header

  The buffer that holds the 100 byte header.

### fileLength

    protected long fileLength

  Holds the length of the file, in bytes.

### fileVersion

    protected int fileVersion

  Holds the version of the file, as an int.

### fileShapeType

    protected int fileShapeType

  Holds the shape type of the file.

### fileBounds

    protected ESRIBoundingBox fileBounds

  Holds the bounds of the file (four doubles).

### recHdr

    protected byte[] recHdr

  A buffer for current record's header.

### recBuf

    protected byte[] recBuf

  A buffer for the current record's data.

Constructor Detail

### ShapeFile

    public ShapeFile(java.lang.String name)
              throws java.io.IOException

  Construct a `ShapeFile` from a file name.

Throws:
  `java.io.IOException` - if something goes wrong opening or reading the file.

### ShapeFile

    public ShapeFile(java.io.File file)
              throws java.io.IOException

  Construct a `ShapeFile` from the given `File`.

Parameters:
  `file` - A file object representing an ESRI Shape File
Throws:
  `java.io.IOException` - if something goes wrong opening or reading the file.

Method Detail

### initHeader

    protected void initHeader()
                       throws java.io.IOException

  Reads or writes the header of a Shape file. If the file is empty, a blank header is written and then read. If the file is not empty, the header is read.

  After this function runs, the file pointer is set to byte 100, the first byte of the first record in the file.

  Throws:
    `java.io.IOException` - if something goes wrong reading or writing the shape file

### writeHeader

    protected void writeHeader()
                        throws java.io.IOException

  Writes a blank header into the shape file.

  Throws:
    `java.io.IOException` - if something goes wrong writing the shape file

### readHeader

    protected void readHeader()
                       throws java.io.IOException

  Reads and parses the header of the file. Values from the header are stored in the fields of this class.

  Throws:
    `java.io.IOException` - if something goes wrong reading the file
  See Also:
    `header`, `fileVersion`, `fileLength`, `fileShapeType`, `fileBounds`

### getFileLength

    public long getFileLength()

  Returns the length of the file in bytes.

  Returns:
    the file length

### getFileVersion

    public int getFileVersion()

  Returns the version of the file. The only currently supported version is 1000 (which represents version 1).

  Returns:
    the file version

### getShapeType

    public int getShapeType()

  Returns the shape type of the file. Shape files do not mix shape types; all the shapes are of the same type.

  Returns:
    the file's shape type

### setShapeType

    public void setShapeType(int newShapeType)
                      throws java.io.IOException,
                             java.lang.IllegalArgumentException

  Sets the shape type of the file. If the file has a shape type already, it cannot be set. If it does not have a shape type, it is set and written to the file in the header.

  Shape types are enumerated in the class ShapeUtils.

  Parameters:
    `newShapeType` - the new shape type
  Throws:
    `java.io.IOException` - if something goes wrong writing the file
    `java.lang.IllegalArgumentException` - if file already has a shape type
  See Also:
    `ShapeUtils`

### getBoundingBox

    public ESRIBoundingBox getBoundingBox()

  Returns the bounding box of this shape file. The bounding box is the smallest rectangle that encloses all the shapes in the file.

  Returns:
    the bounding box

### getNextRecord

    public ESRIRecord getNextRecord()
                             throws java.io.IOException

  Returns the next record from the shape file as an `ESRIRecord`. Each successive call gets the next record. There is no way to go back a record. When there are no more records, `null` is returned.

  Returns:
    a record, or null if there are no more records
  Throws:
    `java.io.IOException` - if something goes wrong reading the file

### add

    public void add(ESRIRecord r)
             throws java.io.IOException

  Adds a record to the end of this file. The record is written to the file at the end of the last record.

  Parameters:
    `r` - the record to be added
  Throws:
    `java.io.IOException` - if something goes wrong writing to the file

### close

    public void close()
               throws java.io.IOException

  Closes the shape file and disposes of resources.

  Throws:
    `java.io.IOException` - if something goes wrong closing the file

### verify

    public void verify(boolean repair,
                       boolean verbose)
                throws java.io.IOException

  Verifies the contents of a shape file. The header is verified for file length, bounding box, and shape type. The records are verified for shape type and record number. The file is verified for proper termination (EOF at the end of a record).

  Parameters:
    `repair` - NOT CURRENTLY USED - would signal that the file should be repaired if possible
    `verbose` - NOT CURRENTLY USED - would cause the verifier to display progress and status
  Throws:
    `java.io.IOException` - if something goes wrong reading or writing the file

### verifyRecordBuffer

    protected void verifyRecordBuffer(int size)

  Verifies that the record buffer is big enough to hold the given number of bytes. If it is not big enough a new buffer is created that can hold the given number of bytes.

  Parameters:
    `size` - the number of bytes the buffer needs to hold

### 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

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