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com.cosylab.util
Class ArrayHelper

java.lang.Object
  com.cosylab.util.ArrayHelper

public final class ArrayHelper
extends java.lang.Object

A class containing convenience methods for working with arrays.

Version:

$id$

Author:

Miha Kadunc

Constructor Summary

ArrayHelper()

Method Summary

static boolean	contains(java.lang.Object[] array, java.lang.Object key)
static int	firstGreaterThan(double[] array, double key) Works on non sorted arrays
static int	firstGreaterThan(double[] array, double key, int rangeStart, int rangeEnd) Works on non sorted arrays
static int	firstGreaterThanInSorted(double[] array, double key) Works fast on sorted arrays
static int	firstGreaterThanInSorted(double[] array, double key, int startIndex, int endIndex) Works fast on sorted arrays
static int	firstIndexOf(java.lang.Object array, java.lang.Object key)
static void	flip(java.lang.Object array)
static java.lang.Object[]	getArrayFromEnumeration(java.util.Enumeration e)
static java.lang.Object[]	getArrayFromIterator(java.util.Iterator i)
static <T> T[]	subArray(java.lang.Class<T> clazz, java.util.List<T> list, int offset, int length) Get a sub array of a list.
static double[]	toDoubleArray(java.lang.Object array)
static int[]	toIntArray(java.lang.Number[] input)
static java.lang.Integer[]	toIntegerArray(int[] input)
static java.lang.Object	trim(java.lang.Object[] array)

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrayHelper

public ArrayHelper()

Method Detail

firstGreaterThan

public static int firstGreaterThan(double[] array,
                                   double key)

Works on non sorted arrays

firstGreaterThan

public static int firstGreaterThan(double[] array,
                                   double key,
                                   int rangeStart,
                                   int rangeEnd)

Works on non sorted arrays

firstGreaterThanInSorted

public static int firstGreaterThanInSorted(double[] array,
                                           double key)

Works fast on sorted arrays

firstGreaterThanInSorted

public static int firstGreaterThanInSorted(double[] array,
                                           double key,
                                           int startIndex,
                                           int endIndex)

Works fast on sorted arrays

firstIndexOf

public static int firstIndexOf(java.lang.Object array,
                               java.lang.Object key)

contains

public static boolean contains(java.lang.Object[] array,
                               java.lang.Object key)

getArrayFromEnumeration

public static java.lang.Object[] getArrayFromEnumeration(java.util.Enumeration e)

getArrayFromIterator

public static java.lang.Object[] getArrayFromIterator(java.util.Iterator i)

flip

public static void flip(java.lang.Object array)

toDoubleArray

public static double[] toDoubleArray(java.lang.Object array)

trim

public static java.lang.Object trim(java.lang.Object[] array)

toIntegerArray

public static java.lang.Integer[] toIntegerArray(int[] input)

toIntArray

public static int[] toIntArray(java.lang.Number[] input)

subArray

public static <T> T[] subArray(java.lang.Class<T> clazz,
                               java.util.List<T> list,
                               int offset,
                               int length)

Get a sub array of a list.

Type Parameters:

T - Type of list's elements.

Parameters:

clazz - The type of list's elements.

list - The list.

offset - Offset in the list that will be the first element of the resulting array.

length - Number of elements in the list.

Returns:

Subarray of the list.