org.tinfour.gis.shapefile

Class DbfFieldDouble

java.lang.Object

org.tinfour.gis.shapefile.DbfField

org.tinfour.gis.shapefile.DbfFieldDouble

public class DbfFieldDouble
extends DbfField

Extends DbfField with special handling for reading numeric values.

Field Summary

Fields inherited from class org.tinfour.gis.shapefile.DbfField

builder, dataAddress, fieldDecimalCount, fieldLength, fieldType, isIntegral, name, numeric, offset

Method Summary

Modifier and Type	Method and Description
Object	getApplicationData() Gets the data for the field as an Object of the appropriate class.
double	getDouble() Gets the double value stored in the field during the most recent read operation, if any
int	getInteger() Gets the equivalent integer value of the field.
double[]	getUniqueValueArray(DbfFileReader dbf) Gets an array of unique values for this field.
boolean	usesEngineeringNotation() Indicates whether the value in the field was encoded using engineering notation (e.g.

Methods inherited from class org.tinfour.gis.shapefile.DbfField

getFieldDecimalCount, getFieldLength, getFieldType, getLogicalValue, getName, getString, getUniqueValues, isIntegral, isNull, isNumeric, toString

Methods inherited from class java.lang.Object

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

Method Detail

getDouble

public double getDouble()

Gets the double value stored in the field during the most recent read operation, if any

Overrides:

getDouble in class DbfField

Returns:

a valid double or a NaN if the file content was invalid

usesEngineeringNotation

public boolean usesEngineeringNotation()

Indicates whether the value in the field was encoded using engineering notation (e.g. scientific notation)

Overrides:

usesEngineeringNotation in class DbfField

Returns:

true if engineering notation was used; otherwise false.

getInteger

public int getInteger()

Gets the equivalent integer value of the field.

Overrides:

getInteger in class DbfField

Returns:

a valid integral value, or a zero if undefined.

getApplicationData

public Object getApplicationData()

Description copied from class: DbfField

Gets the data for the field as an Object of the appropriate class. For the DbdField base class, the return value is a string. For others, the return type may vary.

Overrides:

getApplicationData in class DbfField

Returns:

an object, potentially null if the record has not been read.

getUniqueValueArray

public double[] getUniqueValueArray(DbfFileReader dbf)
                             throws IOException

Gets an array of unique values for this field.

Parameters:

dbf - a valid instance

Returns:

if successful an array of zero or more elements.

Throws:

IOException - in the event of an unrecoverable I/O condition.