com.atlassian.jira.util
Class CollectionReorderer<T>

java.lang.Object
  com.atlassian.jira.util.CollectionReorderer<T>

public class CollectionReorderer<T>
extends Object

Constructor Summary

CollectionReorderer()

Method Summary

void	decreasePosition(List<T> objects, T toMove)
void	increasePosition(List<T> objects, T toMove)
void	moveToEnd(List<T> objects, T toMove)
void	moveToPosition(List<T> objects, int initialPosition, int targetPosition) If moving more than one object at the same time please use moveToPosition(java.util.List, java.util.Map) Moves an object at initialPosition index in the objects list to the targetPosition index
void	moveToPosition(List<T> objects, Map<Integer,T> positionToObjects) Moves multiple objects in the objects list to given destination indexes
void	moveToPositionAfter(List<T> objects, T toMove, T target) Move the 'toMove' to the position after the 'target'.
void	moveToStart(List<T> objects, T toMove)

Methods inherited from class java.lang.Object

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

Constructor Detail

CollectionReorderer

public CollectionReorderer()

Method Detail

moveToStart

public void moveToStart(List<T> objects,
                        T toMove)

moveToEnd

public void moveToEnd(List<T> objects,
                      T toMove)

decreasePosition

public void decreasePosition(List<T> objects,
                             T toMove)

increasePosition

public void increasePosition(List<T> objects,
                             T toMove)

moveToPositionAfter

public void moveToPositionAfter(List<T> objects,
                                T toMove,
                                T target)

Move the 'toMove' to the position after the 'target'. To insert to the head of the list set afterThis to null

Parameters:

objects - list of objects to look up and order in

toMove - the object to move

target - the position to move to

moveToPosition

public void moveToPosition(List<T> objects,
                           Map<Integer,T> positionToObjects)

Moves multiple objects in the objects list to given destination indexes

Parameters:

objects - the list of objects

positionToObjects - a naturally sorted map with destination indexes as keys and the objects to move as values

moveToPosition

public void moveToPosition(List<T> objects,
                           int initialPosition,
                           int targetPosition)

If moving more than one object at the same time please use moveToPosition(java.util.List, java.util.Map)

Moves an object at initialPosition index in the objects list to the targetPosition index

Parameters:

objects - the list of objects to modify

initialPosition - the current index of the object that should be moved in the objects list

targetPosition - the destination index