Package org.okkam.awesome.utils

Class OkkamLists

java.lang.Object

org.okkam.awesome.utils.OkkamLists

public class OkkamLists
extends Object

Method Summary

Modifier and Type	Method	Description
static <T> boolean	addIfEquals(List<T> list, T elemToAdd, T elemToCompare)	Add elemToAdd to the list only if it is equals to elemToCompare.
static <T,T1> boolean	addIfEquals(List<T> list, T elemToAdd, T1 element1, T1 element2)	Add elemToAdd to the list only if element1 is equals to element2.
static <T> List<T>	addIfNotContained(List<T> list, T... elements)	add elements if not already contained.
static <T> List<T>	appendElements(List<T> list, T... elements)	Append elements to a list.
static <T> List<T>	createArrayListIfNull(List<T> list)	Create an ArrayList if the List is null.
static <T> List<T>	prependElements(List<T> list, T... elements)	Prepend elements to a list.

Methods inherited from class java.lang.Object

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

Method Detail

appendElements

@SafeVarargs
public static <T> List<T> appendElements(List<T> list,
                                         T... elements)

Append elements to a list.

Type Parameters:

T - The list and elements type

Parameters:

list - The list

elements - The elements to append

Returns:

The new List

prependElements

@SafeVarargs
public static <T> List<T> prependElements(List<T> list,
                                          T... elements)

Prepend elements to a list.

Type Parameters:

T - The list and elements type

Parameters:

list - The list

elements - The elements to prepend

Returns:

The new List

addIfNotContained

@SafeVarargs
public static <T> List<T> addIfNotContained(List<T> list,
                                            T... elements)

add elements if not already contained.

Type Parameters:

T - The list and elements type

Parameters:

list - The list

elements - The elements to add

Returns:

The new List

addIfEquals

public static <T> boolean addIfEquals(List<T> list,
                                      T elemToAdd,
                                      T elemToCompare)

Add elemToAdd to the list only if it is equals to elemToCompare.

Type Parameters:

T - The list and elements type

Parameters:

list - The list

elemToAdd - The element to add

elemToCompare - The second element

Returns:

true if the elemToAdd was added, false otherwise

addIfEquals

public static <T,T1> boolean addIfEquals(List<T> list,
                                               T elemToAdd,
                                               T1 element1,
                                               T1 element2)

Add elemToAdd to the list only if element1 is equals to element2.

Type Parameters:

T - The list and elements type

T1 - The type of elements to check

Parameters:

list - The list

elemToAdd - The element to add

element1 - The first element

element2 - The second element

Returns:

true if the elemToAdd was added, false otherwise

createArrayListIfNull

public static <T> List<T> createArrayListIfNull(List<T> list)

Create an ArrayList if the List is null.

Type Parameters:

T - The list type

Parameters:

list - The input list

Returns:

The old list or the input one