de.mhus.lib.core

Class MCollection

java.lang.Object

de.mhus.lib.core.MCollection

public class MCollection
extends Object

MCollection class.

Version:

$Id: $Id

Author:

mikehummel

Constructor Summary

Constructors

Constructor and Description
MCollection()

Method Summary

Modifier and Type	Method and Description
static <T> T[]	append(T[] array, T... newElements) append.
static boolean	contains(Object[] array, Object item) Returns true of array is not null and the value of item is included in the array.
static <T> void	copyArray(T[] array, Collection<T> list) Fills a list at the end with the values of an array, ignoring null values.
static int[]	fillIntArray(int from, int to) fillIntArray.
static int[]	order(int[] array, boolean unique) order.
static long[]	order(long[] array, boolean unique) order.
static <T> void	removeDuplicates(List<T> list) remove duplicated entries
static <T> void	removeDuplicates(List<T> list, Comparator<T> comparator) remove duplicated entries, Attention exponential runtime behavior !!! Running from beginning to the end, the first element will be left, following removed.
static <T> List<T>	toList(T[] array) toList.
static Map<String,String>	toStringMap(IProperties in, boolean ignoreNull) toStringMap.
static Map<String,String>	toStringMap(Map<Object,Object> in, boolean ignoreNull) toStringMap.

Methods inherited from class java.lang.Object

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

Constructor Detail

MCollection

public MCollection()

Method Detail

contains

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

Returns true of array is not null and the value of item is included in the array. It compares with the equals() method of the array item. Also a item value of null will be compared.

Parameters:

array - an array of Object objects.

item - a Object object.

Returns:

a boolean.

copyArray

public static <T> void copyArray(T[] array,
                                 Collection<T> list)

Fills a list at the end with the values of an array, ignoring null values.

Type Parameters:

T - a T object.

Parameters:

array - an array of T objects.

list - a Collection object.

removeDuplicates

public static <T> void removeDuplicates(List<T> list)

remove duplicated entries

Type Parameters:

T - a T object.

Parameters:

list - a List object.

removeDuplicates

public static <T> void removeDuplicates(List<T> list,
                                        Comparator<T> comparator)

remove duplicated entries, Attention exponential runtime behavior !!! Running from beginning to the end, the first element will be left, following removed.

Type Parameters:

T - a T object.

Parameters:

list - a List object.

comparator - a Comparator object.

append

@SafeVarargs
public static <T> T[] append(T[] array,
                                          T... newElements)

append.

Type Parameters:

T - a T object.

Parameters:

array - an array of T objects.

newElements - a T object.

Returns:

an array of T objects.

order

public static int[] order(int[] array,
                          boolean unique)

order.

Parameters:

array - an array of int.

unique - a boolean.

Returns:

an array of int.

order

public static long[] order(long[] array,
                           boolean unique)

order.

Parameters:

array - an array of long.

unique - a boolean.

Returns:

an array of long.

fillIntArray

public static int[] fillIntArray(int from,
                                 int to)

fillIntArray.

Parameters:

from - a int.

to - a int.

Returns:

an array of int.

toStringMap

public static Map<String,String> toStringMap(Map<Object,Object> in,
                                             boolean ignoreNull)

toStringMap.

Parameters:

in - a Map object.

ignoreNull - a boolean.

Returns:

a Map object.

Since:

3.2.9

toStringMap

public static Map<String,String> toStringMap(IProperties in,
                                             boolean ignoreNull)

toStringMap.

Parameters:

in - a IProperties object.

ignoreNull - a boolean.

Returns:

a Map object.

Since:

3.2.9

toList

public static <T> List<T> toList(T[] array)

toList.

Type Parameters:

T - a T object.

Parameters:

array - an array of T objects.

Returns:

a List object.