uk.ac.gla.terrier.utility
Class ArrayUtils

java.lang.Object
  uk.ac.gla.terrier.utility.ArrayUtils

public class ArrayUtils
extends java.lang.Object

Handy methods for resizing arrays, and other handy array methods This is a fresh implementation of the capacity methods, without the use of any prelicensed code.

Version:

$Revision: 1.6 $

Author:

Ben He

Constructor Summary

ArrayUtils()

Method Summary

static byte[]	ensureCapacity(byte[] array, int length) Grow an array to ensure it is the desired length.
static byte[]	ensureCapacity(byte[] array, int length, int preserve) Grow an array to ensure it is the desired length.
static byte[]	grow(byte[] array, int length) Grow an array to ensure it is at least the desired length.
static byte[]	grow(byte[] array, int length, int preserve) Grow an array to ensure it is at least the desired length.
static java.lang.String	join(java.lang.String[] in, java.lang.String join) Join some strings together.

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrayUtils

public ArrayUtils()

Method Detail

ensureCapacity

public static byte[] ensureCapacity(byte[] array,
                                    int length)

Grow an array to ensure it is the desired length.

Parameters:

array - input array

length - ensure array is this length

Returns:

new array with desired length

ensureCapacity

public static byte[] ensureCapacity(byte[] array,
                                    int length,
                                    int preserve)

Grow an array to ensure it is the desired length. Only copy the first preserve elements from the input array

Parameters:

array - input array

length - new desired length

preserve - amount of old array to copy to new array in case of reallocation

Returns:

new array with desired length

grow

public static byte[] grow(byte[] array,
                          int length)

Grow an array to ensure it is at least the desired length. The golden ratio is involved in the new length

Parameters:

array - input array

length - minimuim length of new array

Returns:

new array appropriately sized

grow

public static byte[] grow(byte[] array,
                          int length,
                          int preserve)

Grow an array to ensure it is at least the desired length. The golden ratio is involved in the new length. Only copy the first preserve elements from the input array.

Parameters:

array - input array

length - minimuim length of new array

Returns:

new array appropriately sized

join

public static java.lang.String join(java.lang.String[] in,
                                    java.lang.String join)

Join some strings together.

Parameters:

in - Strings to join

join - Character or String to join by