StickyFunc (cactoos 0.55.0 API)

java.lang.Object
- org.cactoos.func.StickyFunc<X,Y>

Type Parameters:

X - Type of input

Y - Type of output

All Implemented Interfaces:

Func<X,Y>
```
public final class StickyFunc<X,Y>
extends Object
implements Func<X,Y>
```
Func that caches previously calculated values and doesn't recalculate again.
This Func decorator technically is an in-memory cache.

Pay attention that this class is not thread-safe. It is highly recommended to always decorate it with SyncFunc.

There is no thread-safety guarantee.

Since:

0.1

See Also:

Sticky

- Constructor Summary
  
  Constructors
  Constructor Description
  
  StickyFunc(Func<X,Y> fnc)
  Ctor.
  
  StickyFunc(Func<X,Y> fnc, int max)
  Ctor.
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  Y apply(X input)
  Apply it.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - StickyFunc
```
public StickyFunc(Func<X,Y> fnc)
```
    Ctor.
    
    Parameters:
    
    fnc - Func original
  - StickyFunc
```
public StickyFunc(Func<X,Y> fnc,
                  int max)
```
    Ctor.
    
    Parameters:
    
    fnc - Func original
    
    max - Maximum cache size
    
    Since:
    
    0.26
- Method Detail
  - apply
```
public Y apply(X input)
        throws Exception
```
    Description copied from interface: Func
    
    Apply it.
    
    Specified by:
    
    apply in interface Func<X,Y>
    
    Parameters:
    
    input - The argument
    
    Returns:
    
    The result
    
    Throws:
    
    Exception - If fails