Package com.jbstrap.core.utils

Class MapUtils

java.lang.Object

com.jbstrap.core.utils.MapUtils

public final class MapUtils
extends Object

Map handling utility methods

Since:

4.0

Author:

JBStrap

Method Summary

Modifier and Type	Method	Description
static <K, V> Map.Entry<K,V>	getElementFromIndex(Map<K,V> input, Integer index)	Gets an element of a map, based on the specified index
static <K, V> void	moveMapElement(Map<K,V> input, Integer sourceIndex, Integer targetIndex)	Moves the specified map element to another position
static <K, V> void	putElementAtIndex(Map<K,V> input, Integer index, Map.Entry<K,V> entry)	Places an element in the specified map, by the specified index.
static <K, V> void	putElementAtIndex(Map<K,V> input, Integer index, K key, V value)	Places an element in the specified map, by the specified index.

Methods inherited from class java.lang.Object

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

Method Details

getElementFromIndex

public static <K,
V> Map.Entry<K,V> getElementFromIndex(Map<K,V> input,
 Integer index)

Gets an element of a map, based on the specified index

Type Parameters:

K - The map key type

V - The map value type

Parameters:

input - The source map

index - The index of the element

Returns:

The map element corresponding to the specified index, or null if not found

putElementAtIndex

public static <K,
V> void putElementAtIndex(Map<K,V> input,
 Integer index,
 Map.Entry<K,V> entry)

Places an element in the specified map, by the specified index. The values after the specified index will be shifted by one position.

Type Parameters:

K - The map key type

V - The map value type

Parameters:

input - The map where the element will be inserted

index - The index of the element

entry - The element that will be inserted

putElementAtIndex

public static <K,
V> void putElementAtIndex(Map<K,V> input,
 Integer index,
 K key,
 V value)

Places an element in the specified map, by the specified index. The values after the specified index will be shifted by one position.

Type Parameters:

K - The map key type

V - The map value type

Parameters:

input - The map where the element will be inserted

index - The index of the element

key - The key of the element that will be inserted

value - The value of the element that will be inserted

moveMapElement

public static <K,
V> void moveMapElement(Map<K,V> input,
 Integer sourceIndex,
 Integer targetIndex)

Moves the specified map element to another position

Type Parameters:

K - The map key type

V - The map value type

Parameters:

input - The source map that has the element that needs to be moved

sourceIndex - The source index of the element

targetIndex - The target index where the element will be moved to