Package org.elasticsearch.xpack.esql.core.util

Class CollectionUtils

java.lang.Object

org.elasticsearch.xpack.esql.core.util.CollectionUtils

public abstract class CollectionUtils
extends Object

Constructor Summary

Constructors

Constructor	Description
CollectionUtils()

Method Summary

Modifier and Type	Method	Description
static <T> List<T>	combine(Collection<? extends T>... collections)
static <T> List<T>	combine(Collection<? extends T> left, T... entries)
static <T> List<T>	combine(List<? extends T> left, List<? extends T> right)
static boolean	isEmpty(Collection<?> col)
static <T> List<T>	prependToCopy(T element, Collection<T> collection)	Creates a copy of the given collection with the given element prepended.

Methods inherited from class java.lang.Object

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

Constructor Details

CollectionUtils

public CollectionUtils()

Method Details

isEmpty

public static boolean isEmpty(Collection<?> col)

combine

public static <T> List<T> combine(List<? extends T> left,
 List<? extends T> right)

combine

@SafeVarargs
public static <T> List<T> combine(Collection<? extends T>... collections)

combine

@SafeVarargs
public static <T> List<T> combine(Collection<? extends T> left,
 T... entries)

prependToCopy

public static <T> List<T> prependToCopy(T element,
 Collection<T> collection)

Creates a copy of the given collection with the given element prepended.

Parameters:

element - element to prepend

collection - collection to copy