dk.heick.properties.types.utils

Class ArrayUtils

java.lang.Object

dk.heick.properties.types.utils.ArrayUtils

public class ArrayUtils
extends Object

Assorted utility methods for arrays, usually with generics.

Since:

1.9

Author:

Frederik Heick

Constructor Summary

Constructors

Constructor and Description
ArrayUtils()

Method Summary

Modifier and Type	Method and Description
static <T> boolean	isInArray(T[] array, T value) Will validate if a value is in an array.
static String[]	removeAll(String[] array, String remove, boolean trim) Remove all elements from an array which is equal to a string value.
static <T> T[]	toArray(List<T> list) Converts a generic list to an array.
static <T> String	toString(T[] a, String divider) A toString builder for a list of T's divided by divider.

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrayUtils

public ArrayUtils()

Method Detail

removeAll

public static String[] removeAll(String[] array,
                                 String remove,
                                 boolean trim)
                          throws NullPointerException

Remove all elements from an array which is equal to a string value.

Parameters:

array - the array to iterate over

remove - the string value to compare with, if equal then it is remove from the array,

trim - should the element be trimmed before compare.

Returns:

an array without any element which is equal to the string.

Throws:

NullPointerException - if the array or any array elemennt is null.

isInArray

public static final <T> boolean isInArray(T[] array,
                                          T value)

Will validate if a value is in an array.

Parameters:

array - the array of elements of type T, null elements is ignored.

value - the value.

Returns:

false if the array is empty or null, or the value is null, or it do not exists in array using equal method, otherwise true.

toString

public static <T> String toString(T[] a,
                                  String divider)

A toString builder for a list of T's divided by divider.

Parameters:

a - a list T objects.

divider - the string that will divide the toString objects.

Returns:

a String of [toString()] divided by [divider]. If object at index x is null than [null] is returned.

toArray

public static <T> T[] toArray(List<T> list)

Converts a generic list to an array.

Parameters:

list - the List of <T>.

Returns:

null, if the list is null, otherwise the list as an array.