com.net2plan.utils

Class LongUtils

java.lang.Object

com.net2plan.utils.LongUtils

public class LongUtils
extends java.lang.Object

Provides extra functionality for long primitives.

Since:

0.2.3

Author:

Pablo Pavon-Marino, Jose-Luis Izquierdo-Zaragoza

Constructor Summary

Constructors

Constructor and Description
LongUtils()

Method Summary

Methods

Modifier and Type	Method and Description
static java.lang.Long[]	asObjectArray(long[] array) Converts from an long array to an Long array.
static long[]	asPrimitiveArray(java.lang.Long[] array) Converts from an Long array to an long array.
static long[]	concatenate(long[]... arrays) Concatenates a series of arrays.
static boolean	contains(long[] array, long value) Checks if an input array contains a given value
static boolean	containsAll(long[] array1, long[] array2) Checks if an array contains all numbers from another.
static boolean	containsAny(long[] array1, long[] array2) Checks whether any element of an array is present in another.
static long[]	copy(long[] array) Returns a deep copy of the input array.
static int[]	find(long[] array, long value, Constants.SearchType searchType) Returns the position(s) where a given value can be found into an array.
static java.lang.String	join(long[] array, java.lang.String separator) Joins the elements in an input array using a given separator.
static long[]	select(long[] array, int[] indexes) Returns a set of selected elements from an input array.
static long[]	setdiff(long[]... arrays) Returns the elements contained in the first array, but not any of the others.
static long[]	toArray(java.util.Collection<java.lang.Long> list) Converts a collection (List, Set...) of Long objects to a long array.
static int[]	toIntArray(long[] array) Converts a long array to an int array (truncation may happen).
static java.util.List<java.lang.Long>	toList(long[] array) Converts from a long array to a list.
static long[]	union(long[]... arrays) Returns an array with all elements in input arrays (no repetitions).

Methods inherited from class java.lang.Object

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

Constructor Detail

LongUtils

public LongUtils()

Method Detail

asObjectArray

public static java.lang.Long[] asObjectArray(long[] array)

Converts from an long array to an Long array.

Parameters:

array - long array

Returns:

Equivalent Long array

Since:

0.2.3

asPrimitiveArray

public static long[] asPrimitiveArray(java.lang.Long[] array)

Converts from an Long array to an long array.

Parameters:

array - Long array

Returns:

Equivalent long array

Since:

0.2.3

concatenate

public static long[] concatenate(long[]... arrays)

Concatenates a series of arrays.

Parameters:

arrays - List of arrays

Returns:

Concatenated array

Since:

0.2.3

contains

public static boolean contains(long[] array,
               long value)

Checks if an input array contains a given value

Parameters:

array - Input array

value - Value to search

Returns:

true if value is present in array, and false otherwise

Since:

0.2.3

containsAll

public static boolean containsAll(long[] array1,
                  long[] array2)

Checks if an array contains all numbers from another.

Parameters:

array1 - Container array

array2 - Array with elements to be checked

Returns:

true if value is present in array, and false otherwise

Since:

0.2.3

containsAny

public static boolean containsAny(long[] array1,
                  long[] array2)

Checks whether any element of an array is present in another.

Parameters:

array1 - Container array

array2 - Array with elements to be checked

Returns:

true if any number in array1 is present in array2, and false otherwise

Since:

0.2.3

copy

public static long[] copy(long[] array)

Returns a deep copy of the input array.

Parameters:

array - Input array

Returns:

Deep copy of array

Since:

0.2.3

setdiff

public static long[] setdiff(long[]... arrays)

Returns the elements contained in the first array, but not any of the others.

Parameters:

arrays - Input arrays

Returns:

Difference set

Since:

0.2.3

toArray

public static long[] toArray(java.util.Collection<java.lang.Long> list)

Converts a collection (List, Set...) of Long objects to a long array.

Parameters:

list - Input list

Returns:

long array

Since:

0.2.3

toList

public static java.util.List<java.lang.Long> toList(long[] array)

Converts from a long array to a list.

Parameters:

array - Input array

Returns:

A list of Long objects

Since:

0.2.3

join

public static java.lang.String join(long[] array,
                    java.lang.String separator)

Joins the elements in an input array using a given separator. It is an improved version of Arrays.toString().

Parameters:

array - Input array

separator - Separator

Returns:

String representation of the input array

Since:

0.2.0

toIntArray

public static int[] toIntArray(long[] array)

Converts a long array to an int array (truncation may happen).

Parameters:

array - Input array

Returns:

int array

Since:

0.2.3

union

public static long[] union(long[]... arrays)

Returns an array with all elements in input arrays (no repetitions). There is no order guarantee.

Parameters:

arrays - Input arrays

Returns:

A new array with all elements in input arrays

Since:

0.2.3

find

public static int[] find(long[] array,
         long value,
         Constants.SearchType searchType)

Returns the position(s) where a given value can be found into an array.

Parameters:

array - Input array

value - Value to be searched for

searchType - Indicates whether the first, the last, or all minimum positions are returned

Returns:

Position(s) in which the minimum value is found

Since:

0.2.3

select

public static long[] select(long[] array,
            int[] indexes)

Returns a set of selected elements from an input array. It is not backed in the input array, thus changes in this array are not reflected in the input array.

Parameters:

array - Input array

indexes - Position of elements to be selected.

Returns:

Set of elements in the order given by indexes

Since:

0.2.3