org.elasticsearch.common.util

Enum CollectionUtils

java.lang.Object

java.lang.Enum<CollectionUtils>

org.elasticsearch.common.util.CollectionUtils

All Implemented Interfaces:

Serializable, Comparable<CollectionUtils>

public enum CollectionUtils
extends Enum<CollectionUtils>

Collections-related utility methods.

Enum Constant Summary

Enum Constants

Enum Constant and Description
CollectionUtils

Method Summary

Methods

Modifier and Type	Method and Description
static <E> ArrayList<E>	arrayAsArrayList(E... elements)
static <E> ArrayList<E>	asArrayList(E first, E... other)
static <E> ArrayList<E>	asArrayList(E first, E second, E... other)
static <T> Iterator<T>	concat(Iterator<? extends T>... iterators) Combines multiple iterators into a single iterator.
static <E> List<List<E>>	eagerPartition(List<E> list, int size)
static <E,T> List<T>	eagerTransform(List<E> list, com.google.common.base.Function<E,T> transform)
static boolean	isEmpty(Object[] array) Checks if the given array contains any elements.
static <E> ArrayList<E>	iterableAsArrayList(Iterable<? extends E> elements)
static <E> LinkedList<E>	newLinkedList(Iterable<E> elements)
static <E> ArrayList<E>	newSingletonArrayList(E element)
static <T> List<T>	rotate(List<T> list, int distance) Return a rotated view of the given list with the given distance.
static void	sort(org.apache.lucene.util.BytesRefArray bytes, int[] indices)
static void	sort(double[] array, int len)
static void	sort(com.carrotsearch.hppc.DoubleArrayList list)
static void	sort(float[] array, int len)
static void	sort(com.carrotsearch.hppc.FloatArrayList list)
static void	sort(long[] array, int len)
static void	sort(com.carrotsearch.hppc.LongArrayList list)
static void	sort(com.carrotsearch.hppc.ObjectArrayList<byte[]> array)
static int	sortAndDedup(org.apache.lucene.util.BytesRefArray bytes, int[] indices)
static int	sortAndDedup(double[] array, int len) Sort and deduplicate values in-place, then return the unique element count.
static void	sortAndDedup(com.carrotsearch.hppc.DoubleArrayList list)
static int	sortAndDedup(float[] array, int len) Sort and deduplicate values in-place, then return the unique element count.
static void	sortAndDedup(com.carrotsearch.hppc.FloatArrayList list)
static int	sortAndDedup(long[] array, int len) Sort and deduplicate values in-place, then return the unique element count.
static void	sortAndDedup(com.carrotsearch.hppc.LongArrayList list)
static void	sortAndDedup(com.carrotsearch.hppc.ObjectArrayList<byte[]> array)
static CollectionUtils	valueOf(String name) Returns the enum constant of this type with the specified name.
static CollectionUtils[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

CollectionUtils

public static final CollectionUtils CollectionUtils

Method Detail

values

public static CollectionUtils[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (CollectionUtils c : CollectionUtils.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static CollectionUtils valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

sort

public static void sort(com.carrotsearch.hppc.LongArrayList list)

sort

public static void sort(long[] array,
        int len)

sortAndDedup

public static void sortAndDedup(com.carrotsearch.hppc.LongArrayList list)

sortAndDedup

public static int sortAndDedup(long[] array,
               int len)

Sort and deduplicate values in-place, then return the unique element count.

sort

public static void sort(com.carrotsearch.hppc.FloatArrayList list)

sort

public static void sort(float[] array,
        int len)

sortAndDedup

public static void sortAndDedup(com.carrotsearch.hppc.FloatArrayList list)

sortAndDedup

public static int sortAndDedup(float[] array,
               int len)

Sort and deduplicate values in-place, then return the unique element count.

sort

public static void sort(com.carrotsearch.hppc.DoubleArrayList list)

sort

public static void sort(double[] array,
        int len)

sortAndDedup

public static void sortAndDedup(com.carrotsearch.hppc.DoubleArrayList list)

sortAndDedup

public static int sortAndDedup(double[] array,
               int len)

Sort and deduplicate values in-place, then return the unique element count.

isEmpty

public static boolean isEmpty(Object[] array)

Checks if the given array contains any elements.

Parameters:

array - The array to check

Returns:

false if the array contains an element, true if not or the array is null.

rotate

public static <T> List<T> rotate(List<T> list,
                 int distance)

Return a rotated view of the given list with the given distance.

sortAndDedup

public static void sortAndDedup(com.carrotsearch.hppc.ObjectArrayList<byte[]> array)

sort

public static void sort(com.carrotsearch.hppc.ObjectArrayList<byte[]> array)

sort

public static void sort(org.apache.lucene.util.BytesRefArray bytes,
        int[] indices)

sortAndDedup

public static int sortAndDedup(org.apache.lucene.util.BytesRefArray bytes,
               int[] indices)

concat

public static <T> Iterator<T> concat(Iterator<? extends T>... iterators)

Combines multiple iterators into a single iterator.

iterableAsArrayList

public static <E> ArrayList<E> iterableAsArrayList(Iterable<? extends E> elements)

eagerTransform

public static <E,T> List<T> eagerTransform(List<E> list,
                           com.google.common.base.Function<E,T> transform)

arrayAsArrayList

public static <E> ArrayList<E> arrayAsArrayList(E... elements)

asArrayList

public static <E> ArrayList<E> asArrayList(E first,
                           E... other)

asArrayList

public static <E> ArrayList<E> asArrayList(E first,
                           E second,
                           E... other)

newSingletonArrayList

public static <E> ArrayList<E> newSingletonArrayList(E element)

newLinkedList

public static <E> LinkedList<E> newLinkedList(Iterable<E> elements)

eagerPartition

public static <E> List<List<E>> eagerPartition(List<E> list,
                               int size)