Module org.apache.jena.base

Package org.apache.jena.atlas.lib

Class StreamOps

java.lang.Object

org.apache.jena.atlas.lib.StreamOps

public class StreamOps
extends Object

Collect some stream operations into one place. Sometimes, the function form reads better.

See Also:

• Iter - a stream-like class for iterators.

Constructor Summary

Constructors

Constructor	Description
StreamOps()

Method Summary

Modifier and Type	Method	Description
static <X> Stream<X>	debug(Stream<X> stream)	Print immediate, noting empty streams
static <X> X	element(Collection<X> collection)	An element from a Collection
static <X> X	first(Stream<X> stream)	First element or null
static <X> Stream<X>	print(PrintStream out, String leader, Stream<X> stream)
static <X> Stream<X>	print(PrintStream out, Stream<X> stream)
static <X> Stream<X>	print(Stream<X> stream)	Debug : print stream.
static <X> Stream<X>	stream(Iterator<X> iter)	Iterator to Stream.
static <X> List<X>	toList(Stream<X> stream)	Stream to List
static <X> Set<X>	toSet(Stream<X> stream)	Stream to Set

Methods inherited from class java.lang.Object

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

Constructor Details

StreamOps

public StreamOps()

Method Details

stream

public static <X> Stream<X> stream(Iterator<X> iter)

Iterator to Stream. Call to Iter.asStream(java.util.Iterator<T>).

toList

public static <X> List<X> toList(Stream<X> stream)

Stream to List

toSet

public static <X> Set<X> toSet(Stream<X> stream)

Stream to Set

first

public static <X> X first(Stream<X> stream)

First element or null

element

public static <X> X element(Collection<X> collection)

An element from a Collection

print

public static <X> Stream<X> print(Stream<X> stream)

Debug : print stream. This operation prints the whole stream at the point it is used, and then returns a new stream of the same elements.

print

public static <X> Stream<X> print(PrintStream out,
 Stream<X> stream)

print

public static <X> Stream<X> print(PrintStream out,
 String leader,
 Stream<X> stream)

debug

public static <X> Stream<X> debug(Stream<X> stream)

Print immediate, noting empty streams