Package com.vaadin.flow.internal.change

Class ListAddChange<T extends Serializable>

java.lang.Object

com.vaadin.flow.internal.change.NodeChange

com.vaadin.flow.internal.change.NodeFeatureChange

com.vaadin.flow.internal.change.AbstractListChange<T>

com.vaadin.flow.internal.change.ListAddChange<T>

Type Parameters:

T - the type of the items in the node list

All Implemented Interfaces:

Serializable

public class ListAddChange<T extends Serializable>
extends AbstractListChange<T>

Change describing an add operation in a list node feature.

For internal use only. May be renamed or removed in a future release.

Since:

1.0

Author:

Vaadin Ltd

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
ListAddChange(NodeList<T> list, boolean nodeValues, int index, List<? extends T> newItems)	Creates a new list add change.

Method Summary

Modifier and Type	Method	Description
ListAddChange<T>	copy(int indx)	Gets a copy of the change with the same data except index.
ListAddChange<T>	copy(List<? extends T> items)	Gets a copy of the change with the same data except a list of new items.
List<? extends T>	getNewItems()	Gets the added items.
boolean	isEmpty()	Returns whether this add operation still contains any new items.
protected void	populateJson(com.fasterxml.jackson.databind.node.ObjectNode json, ConstantPool constantPool)	Overridden by subclasses to populate a JSON object when serializing.
void	removeItem(T item)	Removes item from the change list.

Methods inherited from class com.vaadin.flow.internal.change.AbstractListChange

getIndex, getNodeList, setIndex

Methods inherited from class com.vaadin.flow.internal.change.NodeFeatureChange

getFeature

Methods inherited from class com.vaadin.flow.internal.change.NodeChange

getNode, toJson

Methods inherited from class java.lang.Object

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

Constructor Details

ListAddChange

public ListAddChange(NodeList<T> list,
 boolean nodeValues,
 int index,
 List<? extends T> newItems)

Creates a new list add change.

Parameters:

list - the changed list

nodeValues - true if the values are StateNodes, false otherwise

index - the index of the add operations

newItems - a list of new items

Method Details

getNewItems

public List<? extends T> getNewItems()

Gets the added items.

Returns:

the added items

isEmpty

public boolean isEmpty()

Returns whether this add operation still contains any new items.

Returns:

true if no new items, false if still has new items

copy

public ListAddChange<T> copy(List<? extends T> items)

Gets a copy of the change with the same data except a list of new items.

Parameters:

items - new list of items

Returns:

a copy of the change based on new items

copy

public ListAddChange<T> copy(int indx)

Description copied from class: AbstractListChange

Gets a copy of the change with the same data except index.

Specified by:

copy in class AbstractListChange<T extends Serializable>

Parameters:

indx - the new index of the change

Returns:

a copy of the change based on new index

populateJson

protected void populateJson(com.fasterxml.jackson.databind.node.ObjectNode json,
 ConstantPool constantPool)

Description copied from class: NodeChange

Overridden by subclasses to populate a JSON object when serializing.

Overrides:

populateJson in class NodeFeatureChange

Parameters:

json - the json object to populate

constantPool - the constant pool to use for serializing constant pool references

removeItem

public void removeItem(T item)

Removes item from the change list.

Note: This should be used only when list of changes is being re-indexed after adding a new change.

Parameters:

item - Item to be removed.