Package org.apache.arrow.util

Class Collections2

java.lang.Object

org.apache.arrow.util.Collections2

public final class Collections2
extends Object

Utility methods for manipulating Collections and their subclasses/implementations.

Method Summary

Modifier and Type	Method	Description
static <V> List<V>	asImmutableList(V... values)	Copies the values to a new unmodifiable list.
static <V> List<V>	immutableListCopy(List<V> list)	Copies the elements of list to a new unmodifiable list.
static <K, V> Map<K,V>	immutableMapCopy(Map<K,V> map)	Copies the elements of map to a new unmodifiable map.
static <T> List<T>	toImmutableList(Iterable<T> iterable)	Converts the iterable into a new immutable List.
static <T> List<T>	toList(Iterable<T> iterable)	Converts the iterable into a new List.
static <T> List<T>	toList(Iterator<T> iterator)	Creates a List from the elements remaining in iterator.
static String	toString(Iterator<?> iterator)	Creates a human readable string from the remaining elements in iterator.

Methods inherited from class java.lang.Object

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

Method Details

toList

public static <T> List<T> toList(Iterator<T> iterator)

Creates a List from the elements remaining in iterator.

toList

public static <T> List<T> toList(Iterable<T> iterable)

Converts the iterable into a new List.

toImmutableList

public static <T> List<T> toImmutableList(Iterable<T> iterable)

Converts the iterable into a new immutable List.

immutableMapCopy

public static <K,
V> Map<K,V> immutableMapCopy(Map<K,V> map)

Copies the elements of map to a new unmodifiable map.

immutableListCopy

public static <V> List<V> immutableListCopy(List<V> list)

Copies the elements of list to a new unmodifiable list.

asImmutableList

public static <V> List<V> asImmutableList(V... values)

Copies the values to a new unmodifiable list.

toString

public static String toString(Iterator<?> iterator)

Creates a human readable string from the remaining elements in iterator.

The output should be similar to Arrays#toString(Object[])