visad.data.in

Class ValueUnpacker

java.lang.Object

visad.data.in.ValueProcessor

visad.data.in.ValueUnpacker

Direct Known Subclasses:

OffsetUnpacker, ScaleAndOffsetUnpacker, ScaleUnpacker

public abstract class ValueUnpacker
extends ValueProcessor

Provides support for unpacking data values (i.e. converting them from smaller types to bigger types).

Instances are immutable.

Method Summary

Modifier and Type	Method and Description
double	getIncrement() Returns the minimum, potential increment between numeric values.
static ValueUnpacker	valueUnpacker() Returns the trivial value unpacker.

Methods inherited from class visad.data.in.ValueProcessor

process, process, process, process

Methods inherited from class java.lang.Object

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

Method Detail

valueUnpacker

public static ValueUnpacker valueUnpacker()

Returns the trivial value unpacker. The trivial value unpacker does nothing to the value during processing and its getIncrement() method returns NaN.

Returns:

The trivial value unpacker.

getIncrement

public double getIncrement()

Returns the minimum, potential increment between numeric values. Typically, this is the absolute magnitude of a "scale factor" attribute. If the increment is undefined or not applicable, then Double.NaN is returned. This method should be overridden in appropriate subclasses.

Returns:

Double.NaN.