Package dev.frostlake.executor.expressions

Class VariantNumbers

java.lang.Object

dev.frostlake.executor.expressions.VariantNumbers

public final class VariantNumbers
extends Object

A VARIANT read as a number wherever a number is needed: its JSON number, its JSON string when that spells one, and a JSON boolean as 1 / 0. Anything else — an object, an array, a string that spells no number — fails the variant CAST, naming the member as JSON and the numeric family the use asked for: Failed to cast variant value {"x":1} to REAL for an operator or a numeric function and the double-valued aggregates, … to FIXED for the integer ones (live-verified across + - * / %, the unary sign, ABS / ROUND / FLOOR / SQRT / MOD and their family, SUM / AVG / MEDIAN / BITOR_AGG).

Field Summary

Fields

Modifier and Type	Field	Description
static final String	FIXED	The target of an integer-valued use.
static final String	REAL	The target of a double-valued use.

Method Summary

Modifier and Type	Method	Description
static Number	numberOf(VariantValue variant, String target)	The number a VARIANT member converts to, or null for a JSON null.
static NumericConversionException	refusal(tools.jackson.databind.JsonNode node, String target)	The refusal for a member that reads as no number.

Methods inherited from class java.lang.Object

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

Field Details

REAL

public static final String REAL

The target of a double-valued use.

See Also:

• Constant Field Values

FIXED

public static final String FIXED

The target of an integer-valued use.

See Also:

• Constant Field Values

Method Details

numberOf

public static Number numberOf(VariantValue variant,
 String target)

The number a VARIANT member converts to, or null for a JSON null.

Parameters:

variant - the value

target - REAL or FIXED, named by the refusal

Returns:

its number

refusal

public static NumericConversionException refusal(tools.jackson.databind.JsonNode node,
 String target)

The refusal for a member that reads as no number.

Parameters:

node - the member

target - REAL or FIXED

Returns:

the exception to throw