Package com.chemaxon.calculations.io

Interface MemoizedSparseCollection<T>

Type Parameters:

T - Type of memoized items

All Known Implementing Classes:

MemoizingIterator, SmilesMemoizingMoleculeIterator

@Beta
@PublicAPI
public interface MemoizedSparseCollection<T>

Represents an ordered sparse collection of memoized items. Typical usage is to retrieve structure sources captured during import.

Note that the typical usage of term Memoization usually refers to an operation of storing the results of a potentially expensive calculation (see https://en.wikipedia.org/wiki/Memoization.

Method Summary

Modifier and Type	Method	Description
T	getMemoized(int i)	Get a non-missing memoiozed.
Function<Integer,T>	getMemoizedFunction()	Function to access captured non-missing memoizeds.
Optional<T>	getMemoizedIfPresent(int i)	Get item when present.
T	getMemoizedOrDefault(int i, T defaultValue)	Get item when present or a default value when missing.
Function<Integer,T>	getMemoizedOrDefaultFunction(T defaultValue)	Function to access present items with a default value for missing items.
int	size()	Collected items count.

Method Detail

size

int size()

Collected items count. Including missing items.

Returns:

collected items count

getMemoizedIfPresent

Optional<T> getMemoizedIfPresent(int i)

Get item when present.

Parameters:

i - Index which refers to either a missing or a present element

Returns:

Collected remembered element

getMemoizedOrDefault

T getMemoizedOrDefault(int i,
                       T defaultValue)

Get item when present or a default value when missing.

Parameters:

i - Index which refers to either a missing or a present element

defaultValue - value for return when missing

Returns:

Collected remembered element or default when missing

getMemoized

T getMemoized(int i)
       throws NoSuchElementException

Get a non-missing memoiozed.

Parameters:

i - Index of an item which is not missing

Returns:

Collected remembered item

Throws:

NoSuchElementException - when given index refers to a missing item

getMemoizedFunction

Function<Integer,T> getMemoizedFunction()

Function to access captured non-missing memoizeds.

Returns:

A Function of Integer to the memoized type T which delegates to getMemoized(int)

getMemoizedOrDefaultFunction

Function<Integer,T> getMemoizedOrDefaultFunction(T defaultValue)

Function to access present items with a default value for missing items.

Parameters:

defaultValue - Value to return for missing items.

Returns:

A Function of Integer to the memoized type T which delegates to getMemoizedOrDefault(int, java.lang.Object)