Package org.webpki.cbor

Class CBORFloat

java.lang.Object

org.webpki.cbor.CBORObject

org.webpki.cbor.CBORFloat

All Implemented Interfaces:

Cloneable

public class CBORFloat
extends CBORObject

Class for holding CBOR floating point objects.

Numbers are constrained to the IEEE 754 notation using the length 16, 32, and 64 bit on "wire". Which length to use is governed by the size and precision required to (minimally) correctly represent a number.

Constructor Summary

Constructors

Constructor	Description
CBORFloat(double value)	Creates a CBOR floating point.

Method Summary

Modifier and Type	Method	Description
static String	formatDouble(Double value)	Returns number in diagnostic notation.
int	size()	Returns the size of the optimized IEEE 754 type.

Methods inherited from class org.webpki.cbor.CBORObject

checkForUnread, clone, decode, decode, encode, equals, getArray, getBigInteger, getBoolean, getByte, getBytes, getDouble, getFloat, getInt, getLong, getMap, getShort, getString, getTag, getType, getUnsignedByte, getUnsignedInt, getUnsignedLong, getUnsignedShort, hashCode, isNull, scan, toDiagnosticNotation, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Details

CBORFloat

public CBORFloat(double value)

Creates a CBOR floating point.

Note that this implementation does not provide a specific constructor for Java float values. Due to the CBOR normalization algorithm, numbers are still correctly encoded.

Also see CBORObject.getDouble() and CBORObject.getFloat()

Parameters:

value - Java double

Method Details

formatDouble

public static String formatDouble(Double value)

Returns number in diagnostic notation.

Floating point numbers are always serialized using at least one integer digit (may be 0), a decimal point, and one or more fractional digits.

Possible exponents are written as e±n, where n != 0.

Parameters:

value - The double

Returns:

The double in string format

size

public int size()

Returns the size of the optimized IEEE 754 type.

Note that you must cast a CBORObject to CBORFloat in order to access size().

Returns:

Size in bytes: 2, 4, or 8.