Package jline.lang.constant

Enum SchedStrategyType

java.lang.Object

java.lang.Enum<SchedStrategyType>

jline.lang.constant.SchedStrategyType

All Implemented Interfaces:

Serializable, Comparable<SchedStrategyType>, java.lang.constant.Constable

public enum SchedStrategyType
extends Enum<SchedStrategyType>

Constants for specifying a scheduling strategy type at stations.

Declaration order is MATLAB's numbering in matlab/src/lang/constant/SchedStrategyType.m (NP = 0), so an ordinal means the same thing in all three codebases. It used to start at PR, and the two Prio members below did not exist here at all.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
NP
NPPrio
PNR
PNRPrio
PR
PRPrio

Method Summary

Modifier and Type	Method	Description
static SchedStrategyType	getTypeId(SchedStrategy strategy)	Classifies a scheduling discipline by preemption behaviour and priority.
static SchedStrategyType	valueOf(String name)	Returns the enum constant of this type with the specified name.
static SchedStrategyType[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

NP

public static final SchedStrategyType NP

PR

public static final SchedStrategyType PR

PNR

public static final SchedStrategyType PNR

NPPrio

public static final SchedStrategyType NPPrio

PRPrio

public static final SchedStrategyType PRPrio

PNRPrio

public static final SchedStrategyType PNRPrio

Method Details

values

public static SchedStrategyType[] values()

Returns an array containing the constants of this enum type, in the order they are declared.

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static SchedStrategyType valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

getTypeId

public static SchedStrategyType getTypeId(SchedStrategy strategy)

Classifies a scheduling discipline by preemption behaviour and priority.

This IS the classification Queue stores in schedPolicy: the constructor calls this and keeps no table of its own, as MATLAB's Queue.m and native python's Queue do. The three were written out separately until 2026-09-17 and disagreed on eleven disciplines: this table answered PNR for the preemptive-identical family, PR for PSJF/FB/LRPT and NPPrio for LCFSPRIO where MATLAB answered PR, NP and NP. Nothing in any codebase READS schedPolicy, so the disagreement was never a wrong number, only a wrong label, which is why it survived.

The preemption axis follows each discipline's own definition in SchedStrategy. PI is "preemptive independent", i.e. the preempted job RESTARTS, so it is non-resume and not resume; SRPT, PSJF, FB, LRPT, FSP and EDF preempt, against SJF, LJF, SEPT, LEPT, EDD and SETF, which rank the same jobs without preempting.

Parameters:

strategy - the scheduling discipline

Returns:

the scheduling strategy type