Package nl.vpro.util

Class TailAdder<T>

java.lang.Object

nl.vpro.util.TailAdder<T>

All Implemented Interfaces:

AutoCloseable, Iterator<T>, CloseableIterator<T>, Counted, CountedIterator<T>

public class TailAdder<T>
extends Object
implements CountedIterator<T>

Adapts an existing iterator, to add elements at the end, perhaps based on the last element.

Since:

1.17

Author:

Michiel Meeuwissen

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	TailAdder.Builder<T>

Nested classes/interfaces inherited from interface nl.vpro.util.CloseableIterator

CloseableIterator.WrappedCloseableIterator<S>, CloseableIterator.WrappedPeekingCloseableIterator<S>

Constructor Summary

Constructors

Constructor	Description
TailAdder(Iterator<T> wrapped, boolean onlyIfEmpty, Callable<T>... adder)	Deprecated.
TailAdder(Iterator<T> wrapped, Callable<T> adder)	Deprecated.

Method Summary

Modifier and Type	Method	Description
static <T> TailAdder.Builder<T>	builder()
void	close()
Long	getCount()	The current position.
protected T	getLast()
@NonNull Optional<Long>	getSize()	The size, if known, of the collection this iterator is representing
boolean	hasNext()
T	next()
void	remove()
String	toString()
static <T> TailAdder<T>	withFunctions(Iterator<T> wrapped, Function<T,T>... adder)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface nl.vpro.util.CountedIterator

getTotalSize, peeking, spliterator, stream

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Details

TailAdder

@SafeVarargs
@Deprecated
public TailAdder(Iterator<T> wrapped,
 boolean onlyIfEmpty,
 Callable<T>... adder)

Deprecated.

TailAdder

@Deprecated
public TailAdder(Iterator<T> wrapped,
 Callable<T> adder)

Deprecated.

Method Details

withFunctions

@SafeVarargs
public static <T> TailAdder<T> withFunctions(Iterator<T> wrapped,
 Function<T,T>... adder)

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<T>

next

public T next()

Specified by:

next in interface Iterator<T>

getLast

protected T getLast()

remove

public void remove()

Specified by:

remove in interface Iterator<T>

getSize

public @NonNull Optional<Long> getSize()

Description copied from interface: CountedIterator

The size, if known, of the collection this iterator is representing

Specified by:

getSize in interface CountedIterator<T>

getCount

public Long getCount()

Description copied from interface: CountedIterator

The current position. Will return 1 after first successfull call to Iterator.next(), 2 after the second one, and so on. It will return 0 before the first call.

Specified by:

getCount in interface Counted

Specified by:

getCount in interface CountedIterator<T>

close

public void close()
           throws Exception

Specified by:

close in interface AutoCloseable

Specified by:

close in interface CountedIterator<T>

Throws:

Exception

toString

public String toString()

Overrides:

toString in class Object

builder

public static <T> TailAdder.Builder<T> builder()