org.drools.core.util
Class ArrayUtils

java.lang.Object
  org.drools.core.util.ArrayUtils

public class ArrayUtils
extends Object

Taken from commons lang

Operations on arrays, primitive arrays (like int[]) and primitive wrapper arrays (like Integer[]).

This class tries to handle null input gracefully. An exception will not be thrown for a null array input. However, an Object array that contains a null element may throw an exception. Each method documents its behaviour.

Since:

2.0

Version:

$Id$

Field Summary

static int

INDEX_NOT_FOUND

Constructor Summary

ArrayUtils()

Method Summary

static List<Integer>	asList(int[] ints)
static boolean	contains(Object[] array, Object objectToFind) Checks if the object is in the given array.
static Object[]	copyOf(Object[] original, int newLength, Class newType)
static boolean	deepEquals(Object[] a1, Object[] a2)
static boolean	equals(boolean[] a, boolean[] a2)
static boolean	equals(byte[] a, byte[] a2)
static boolean	equals(char[] a, char[] a2)
static boolean	equals(double[] a, double[] a2)
static boolean	equals(float[] a, float[] a2)
static boolean	equals(int[] a, int[] a2)
static boolean	equals(long[] a, long[] a2)
static boolean	equals(Object[] a, Object[] a2)
static boolean	equals(short[] a, short[] a2)
static int	hashCode(Object[] array)
static int	indexOf(Object[] array, Object objectToFind) Finds the index of the given object in the array.
static int	indexOf(Object[] array, Object objectToFind, int startIndex) Finds the index of the given object in the array starting at the given index.
static int[]	toIntArray(List<Integer> list)

Methods inherited from class java.lang.Object

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

Field Detail

INDEX_NOT_FOUND

public static final int INDEX_NOT_FOUND

See Also:

Constant Field Values

Constructor Detail

ArrayUtils

public ArrayUtils()

Method Detail

contains

public static boolean contains(Object[] array,
                               Object objectToFind)

Checks if the object is in the given array.

The method returns false if a null array is passed in.

Parameters:

array - the array to search through

objectToFind - the object to find

Returns:

true if the array contains the object

indexOf

public static int indexOf(Object[] array,
                          Object objectToFind)

Finds the index of the given object in the array.

This method returns INDEX_NOT_FOUND (-1) for a null input array.

Parameters:

array - the array to search through for the object, may be null

objectToFind - the object to find, may be null

Returns:

the index of the object within the array, INDEX_NOT_FOUND (-1) if not found or null array input

indexOf

public static int indexOf(Object[] array,
                          Object objectToFind,
                          int startIndex)

Finds the index of the given object in the array starting at the given index.

This method returns INDEX_NOT_FOUND (-1) for a null input array.

A negative startIndex is treated as zero. A startIndex larger than the array length will return INDEX_NOT_FOUND (-1).

Parameters:

array - the array to search through for the object, may be null

objectToFind - the object to find, may be null

startIndex - the index to start searching at

Returns:

the index of the object within the array starting at the index, INDEX_NOT_FOUND (-1) if not found or null array input

hashCode

public static int hashCode(Object[] array)

copyOf

public static Object[] copyOf(Object[] original,
                              int newLength,
                              Class newType)

deepEquals

public static boolean deepEquals(Object[] a1,
                                 Object[] a2)

Since:

1.5

equals

public static boolean equals(long[] a,
                             long[] a2)

equals

public static boolean equals(int[] a,
                             int[] a2)

equals

public static boolean equals(short[] a,
                             short[] a2)

equals

public static boolean equals(char[] a,
                             char[] a2)

equals

public static boolean equals(byte[] a,
                             byte[] a2)

equals

public static boolean equals(boolean[] a,
                             boolean[] a2)

equals

public static boolean equals(double[] a,
                             double[] a2)

equals

public static boolean equals(float[] a,
                             float[] a2)

equals

public static boolean equals(Object[] a,
                             Object[] a2)

asList

public static List<Integer> asList(int[] ints)

toIntArray

public static int[] toIntArray(List<Integer> list)