Grouper.KeySerdeFactory (druid-processing 28.0.0 API)

Enclosing interface:: Grouper<KeyType>

public static interface Grouper.KeySerdeFactory<T>

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`T`	`copyKey(T key)`	Copies a key.
`Grouper.KeySerde<T>`	`factorize()`	Create a new `Grouper.KeySerde`, which may be stateful.
`Grouper.KeySerde<T>`	`factorizeWithDictionary(List<String> dictionary)`	Create a new `Grouper.KeySerde` with the given dictionary.
`long`	`getMaxDictionarySize()`	Return max dictionary size threshold.
`Comparator<Grouper.Entry<T>>`	`objectComparator(boolean forceDefaultOrder)`	Return an object that knows how to compare two serialized key instances.

- Method Detail
  - getMaxDictionarySize
```
long getMaxDictionarySize()
```
    Return max dictionary size threshold.
    
    Returns:
    
    max dictionary size
  - factorize
```
Grouper.KeySerde<T> factorize()
```
    Create a new Grouper.KeySerde, which may be stateful.
  - factorizeWithDictionary
```
Grouper.KeySerde<T> factorizeWithDictionary(List<String> dictionary)
```
    Create a new Grouper.KeySerde with the given dictionary.
  - copyKey
```
T copyKey(T key)
```
    Copies a key. Required if the key from an Grouper.Entry from Grouper.iterator(boolean) will be retained past the following call to next().
  - objectComparator
```
Comparator<Grouper.Entry<T>> objectComparator(boolean forceDefaultOrder)
```
    Return an object that knows how to compare two serialized key instances. Will be called by the Grouper.iterator(boolean) method if sorting is enabled.
    
    Parameters:
    
    forceDefaultOrder - Return a comparator that sorts by the key in default lexicographic ascending order, regardless of any other conditions (e.g., presence of OrderBySpecs).
    
    Returns:
    
    comparator for key objects.