FilterStreamUtils (Java AIST Class Kit 2.3.1 API)

java.lang.Object
- science.aist.jack.stream.FilterStreamUtils

```
public final class FilterStreamUtils
extends Object
```
Class that contains different filter helper functions for Streams

Since:

2.0

Author:

Andreas Pointner

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static <T> Predicate<T>`	`distinctByKeys(Function<? super T,?>... keyExtractors)`	Method that helps to distinct a stream by multiple properties

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

- Method Detail
  - distinctByKeys
```
@SafeVarargs
public static <T> Predicate<T> distinctByKeys(Function<? super T,?>... keyExtractors)
```
    Method that helps to distinct a stream by multiple properties
    
    Stream<Xyz> s = ...; Stream<Xyz> sDistinct = s.filter(FilterStreamUtils.distinctByKeys(Xyz::getAbc, Xyz::getDef, ...));
    Type Parameters:
    
    T - the type of the class of the stream
    
    Parameters:
    
    keyExtractors - array of key extractor functions
    
    Returns:
    
    a predicate that is used inside filter methods of streams.
    
    See Also:
    
    Java 8 stream distinct by multiple fields