Package org.elasticsearch.common.util

Class CollectionUtils

java.lang.Object

org.elasticsearch.common.util.CollectionUtils

public class CollectionUtils
extends java.lang.Object

Collections-related utility methods.

Constructor Summary

Constructors

Constructor	Description
CollectionUtils()

Method Summary

Modifier and Type	Method	Description
static <E> java.util.ArrayList<E>	arrayAsArrayList(E... elements)
static <E> java.util.ArrayList<E>	asArrayList(E first, E... other)
static <E> java.util.ArrayList<E>	asArrayList(E first, E second, E... other)
static <E> java.util.List<java.util.List<E>>	eagerPartition(java.util.List<E> list, int size)
static void	ensureNoSelfReferences(java.lang.Object value)
static boolean	isEmpty(java.lang.Object[] array)	Checks if the given array contains any elements.
static <E> java.util.ArrayList<E>	iterableAsArrayList(java.lang.Iterable<? extends E> elements)
static <E> java.util.LinkedList<E>	newLinkedList(java.lang.Iterable<E> elements)
static <E> java.util.ArrayList<E>	newSingletonArrayList(E element)
static <T> java.util.List<T>	rotate(java.util.List<T> list, int distance)	Return a rotated view of the given list with the given distance.
static void	sort(double[] array, int len)
static void	sort(float[] array, int len)
static void	sort(long[] array, int len)
static void	sort(com.carrotsearch.hppc.ObjectArrayList<byte[]> array)
static void	sort(org.apache.lucene.util.BytesRefArray bytes, int[] indices)
static void	sortAndDedup(com.carrotsearch.hppc.ObjectArrayList<byte[]> array)
static int	sortAndDedup(org.apache.lucene.util.BytesRefArray bytes, int[] indices)
static int[]	toArray(java.util.Collection<java.lang.Integer> ints)

Methods inherited from class java.lang.Object

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

Constructor Detail

CollectionUtils

public CollectionUtils()

Method Detail

sort

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

sort

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

sort

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

isEmpty

public static boolean isEmpty(java.lang.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> java.util.List<T> rotate(java.util.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)

toArray

public static int[] toArray(java.util.Collection<java.lang.Integer> ints)

ensureNoSelfReferences

public static void ensureNoSelfReferences(java.lang.Object value)

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)

iterableAsArrayList

public static <E> java.util.ArrayList<E> iterableAsArrayList(java.lang.Iterable<? extends E> elements)

arrayAsArrayList

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

asArrayList

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

asArrayList

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

newSingletonArrayList

public static <E> java.util.ArrayList<E> newSingletonArrayList(E element)

newLinkedList

public static <E> java.util.LinkedList<E> newLinkedList(java.lang.Iterable<E> elements)

eagerPartition

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