SpecializationState (druid-processing 32.0.0 API)

java.lang.Object
- org.apache.druid.query.monomorphicprocessing.SpecializationState<T>

Type Parameters:

T - type of query processing algorithm
```
public abstract class SpecializationState<T>
extends Object
```
See Also:

SpecializationService

Constructor Summary

Constructors
Constructor Description

SpecializationState()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`abstract void`	`accountLoopIterations(long loopIterations)`	Accounts the number of loop iterations, made when processing queries without specialized algorithm, i.
`abstract T`	`getSpecialized()`	Returns an instance of specialized version of query processing algorithm, if available, null otherwise.
`T`	`getSpecializedOrDefault(T defaultInstance)`	Returns an instance of specialized version of query processing algorithm, if available, defaultInstance otherwise.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SpecializationState
```
public SpecializationState()
```
- Method Detail
  - getSpecialized
```
@Nullable
public abstract T getSpecialized()
```
    Returns an instance of specialized version of query processing algorithm, if available, null otherwise.
  - getSpecializedOrDefault
```
public final T getSpecializedOrDefault(T defaultInstance)
```
    Returns an instance of specialized version of query processing algorithm, if available, defaultInstance otherwise.
  - accountLoopIterations
```
public abstract void accountLoopIterations(long loopIterations)
```
    Accounts the number of loop iterations, made when processing queries without specialized algorithm, i. e. after getSpecialized() returned null. If sufficiently many loop iterations were made, SpecializationService decides that the algorithm is worth to be specialized, and getSpecialized() will return non-null during later queries.