LazyIterator (vpro-shared-util 3.5.3 API)

java.lang.Object
- nl.vpro.util.LazyIterator<T>

All Implemented Interfaces:

AutoCloseable, Iterator<T>, CloseableIterator<T>, Counted, CountedIterator<T>
```
public class LazyIterator<T>
extends Object
implements CloseableIterator<T>, CountedIterator<T>
```
Wraps a supplier around an iterator. This way you can delay the instantiation of the actual iterator until the first call of hasNext() or next().

Author:

Michiel Meeuwissen

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class LazyIterator.Builder<T>
- Nested classes/interfaces inherited from interface nl.vpro.util.CloseableIterator
  CloseableIterator.WrappedCloseableIterator<S>, CloseableIterator.WrappedPeekingCloseableIterator<S>

Constructor Summary

Constructors
Constructor Description

LazyIterator(Supplier<Iterator<T>> supplier)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static <T> LazyIterator.Builder<T>`	`builder()`
`void`	`close()`
`Long`	`getCount()`	The current position.
`@NonNull Optional<Long>`	`getSize()`	The size, if known, of the collection this iterator is representing
`boolean`	`hasNext()`
`T`	`next()`
`static <S> LazyIterator<S>`	`of(Supplier<Iterator<S>> supplier)`

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

Methods inherited from interface nl.vpro.util.CountedIterator
getTotalSize, peeking, spliterator, stream

Methods inherited from interface java.util.Iterator
forEachRemaining, remove

- Constructor Detail
  - LazyIterator
```
public LazyIterator(Supplier<Iterator<T>> supplier)
```
- Method Detail
  - of
```
public static <S> LazyIterator<S> of(Supplier<Iterator<S>> supplier)
```
  - hasNext
```
public boolean hasNext()
```
    Specified by:
    
    hasNext in interface Iterator<T>
  - next
```
public T next()
```
    Specified by:
    
    next 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>
  - close
```
public void close()
           throws Exception
```
    Specified by:
    
    close in interface AutoCloseable
    
    Specified by:
    
    close in interface CountedIterator<T>
    
    Throws:
    
    Exception
  - builder
```
public static <T> LazyIterator.Builder<T> builder()
```
  - 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>