Package org.springframework.integration.util

Class FunctionIterator<T,V>

java.lang.Object

org.springframework.integration.util.FunctionIterator<T,V>

Type Parameters:

T - inbound iterator element type.

V - outbound element type.

All Implemented Interfaces:

AutoCloseable, Iterator<V>, CloseableIterator<V>

public class FunctionIterator<T,V>
extends Object
implements CloseableIterator<V>

An Iterator implementation to convert each item from the target iterator to a new object applying the function on next().

Since:

4.1

Author:

Artem Bilan, Ruslan Stelmachenko, Gary Russell

Constructor Summary

Constructors

Constructor	Description
FunctionIterator(AutoCloseable closeable, Iterable<T> iterable, Function<? super T,? extends V> function)	Construct an instance with the provided root object, iterable and function.
FunctionIterator(AutoCloseable closeable, Iterator<T> newIterator, Function<? super T,? extends V> function)	Construct an instance with the provided root object, iterator and function.
FunctionIterator(Iterable<T> iterable, Function<? super T,? extends V> function)	Construct an instance with the provided iterable and function.
FunctionIterator(Iterator<T> newIterator, Function<? super T,? extends V> function)	Construct an instance with the provided iterator and function.

Method Summary

Modifier and Type	Method	Description
void	close()
boolean	hasNext()
V	next()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Constructor Details

FunctionIterator

public FunctionIterator(Iterable<T> iterable,
 Function<? super T,? extends V> function)

Construct an instance with the provided iterable and function.

Parameters:

iterable - the iterable.

function - the function.

FunctionIterator

public FunctionIterator(@Nullable
 AutoCloseable closeable,
 Iterable<T> iterable,
 Function<? super T,? extends V> function)

Construct an instance with the provided root object, iterable and function.

Parameters:

closeable - an AutoCloseable to close when iteration is complete.

iterable - the iterable.

function - the function.

Since:

5.0.7

FunctionIterator

public FunctionIterator(Iterator<T> newIterator,
 Function<? super T,? extends V> function)

Construct an instance with the provided iterator and function.

Parameters:

newIterator - the iterator.

function - the function.

FunctionIterator

public FunctionIterator(@Nullable
 AutoCloseable closeable,
 Iterator<T> newIterator,
 Function<? super T,? extends V> function)

Construct an instance with the provided root object, iterator and function.

Parameters:

closeable - an AutoCloseable to close when iteration is complete.

newIterator - the iterator.

function - the function.

Since:

5.0.7

Method Details

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<T>

next

public V next()

Specified by:

next in interface Iterator<T>

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface CloseableIterator<T>