org.springframework.data.gemfire.util

Class StreamUtils

java.lang.Object

org.springframework.data.gemfire.util.StreamUtils

public abstract class StreamUtils
extends Object

The StreamUtils class is a abstract utility class for working with Streams.

Since:

2.0.2

Author:

John Blum

See Also:

Stream

Constructor Summary

Constructors

Constructor and Description
StreamUtils()

Method Summary

Modifier and Type	Method and Description
static <T> Stream<T>	concat(Stream<T>... streams) Concatenates an array of Streams into a single, continuous Stream.
static long	nullSafeCount(Stream<?> stream) Null-safe utility method used to return a count of the number of elements in the given Stream.
static boolean	nullSafeIsEmpty(Stream<?> stream) Null-safe utility method used to determine whether the given Stream is empty.
static <T> Stream<T>	nullSafeStream(Stream<T> stream) Utility method used to guard against null Streams.

Methods inherited from class java.lang.Object

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

Constructor Detail

StreamUtils

public StreamUtils()

Method Detail

concat

public static <T> Stream<T> concat(Stream<T>... streams)

Concatenates an array of Streams into a single, continuous Stream.

Type Parameters:

T - type of elements in the Streams.

Parameters:

streams - array of Streams to concatenate.

Returns:

the concatenated array of Streams as a single, continuous Stream.

See Also:

Stream

nullSafeCount

public static long nullSafeCount(Stream<?> stream)

Null-safe utility method used to return a count of the number of elements in the given Stream.

Parameters:

stream - Stream of elements to count.

Returns:

a count of the number of elements in the Stream.

See Also:

Stream.count(), nullSafeStream(Stream)

nullSafeIsEmpty

public static boolean nullSafeIsEmpty(Stream<?> stream)

Null-safe utility method used to determine whether the given Stream is empty.

Parameters:

stream - Stream to evalute.

Returns:

a boolean value indicating whether the given Stream is empty.

See Also:

Stream, nullSafeCount(Stream)

nullSafeStream

public static <T> Stream<T> nullSafeStream(Stream<T> stream)

Utility method used to guard against null Streams.

Type Parameters:

T - type of the elements in the Stream.

Parameters:

stream - Stream to evaluate.

Returns:

the given Stream if not null or an empty Stream.

See Also:

Stream