Package com.exasol.adapter

Class CollectionUtils

java.lang.Object

com.exasol.adapter.CollectionUtils

public final class CollectionUtils
extends Object

Utilities for working with collections.

Method Summary

Modifier and Type	Method	Description
static <T> List<T>	copyOfOrEmpty(List<T> values)	Create an unmodifiable copy of a list or return an empty list if the input is null.
static <K,V> Map<K,V>	copyOfOrEmpty(Map<K,V> values)	Create an unmodifiable copy of a map or return an empty map if the input is null.

Methods inherited from class java.lang.Object

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

Method Detail

copyOfOrEmpty

public static <T> List<T> copyOfOrEmpty(List<T> values)

Create an unmodifiable copy of a list or return an empty list if the input is null. List elements may be null.

Type Parameters:

T - element type

Parameters:

values - source list

Returns:

unmodifiable list copy or empty list

copyOfOrEmpty

public static <K,V> Map<K,V> copyOfOrEmpty(Map<K,V> values)

Create an unmodifiable copy of a map or return an empty map if the input is null. Map keys and values may be null.

Preserves the iteration order of the input map.

Type Parameters:

K - key type

V - value type

Parameters:

values - source map

Returns:

unmodifiable map copy or empty map