NodeList (Vaadin Platform (vaadin-platform-javadoc) 14.9.6 API)

java.lang.Object
- com.vaadin.flow.internal.nodefeature.NodeFeature
- - com.vaadin.flow.internal.nodefeature.NodeList<T>

Type Parameters:

T - the type of the items in the list

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

SerializableNodeList, StateNodeNodeList
```
public abstract class NodeList<T extends Serializable>
extends NodeFeature
```
A state node feature that structures data as a list.
Should not be used directly, use one of the extending classes instead, which provide a type safe API while ensuring the list is Serializable.
For internal use only. May be renamed or removed in a future release.

Since:

1.0

Author:

Vaadin Ltd

See Also:

Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

protected static class NodeList.SetView<T extends Serializable>
Provides access to a NodeList as a Set.

Nested Classes
Modifier and Type	Class and Description
`protected static class`	`NodeList.SetView<T extends Serializable>` Provides access to a `NodeList` as a `Set`.

Constructor Summary

Constructors
Modifier Constructor and Description

protected NodeList(StateNode node)
Creates a new list for the given node.

Constructors
Modifier	Constructor and Description
`protected`	`NodeList(StateNode node)` Creates a new list for the given node.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`protected void`	`add(int index, T item)` Inserts an item at the given index of the list.
`protected void`	`add(T item)` Adds an item to the end of the list.
`protected void`	`addAll(Collection<? extends T> items)` Adds all provided items to the end of the list.
`protected void`	`clear()` Removes all nodes, including those not known by the server.
`void`	`collectChanges(Consumer<NodeChange> collector)` Collects all changes that are recorded for this feature.
`void`	`forEachChild(Consumer<StateNode> action)` Passes each child node instance to the given consumer.
`void`	`generateChangesFromEmpty()` Generates all changes that would be needed to take this node from its initial empty state to its current state.
`protected T`	`get(int index)` Gets the item at the given index.
`protected List<AbstractListChange<T>>`	`getChangeTracker()` Gets or creates the list used to track changes that should be sent to the client.
`protected int`	`indexOf(T value)` Gets the position of a value in the list.
`protected boolean`	`isNodeValues()` Checks whether this list contains node values.
`protected Iterator<T>`	`iterator()` Gets an iterator returning all items in this list.
`void`	`onDetach()` Called when the state node has been detached from the state tree.
`protected T`	`remove(int index)` Removes the item at the given index.
`protected int`	`size()` Gets the number of items in this list.

Methods inherited from class com.vaadin.flow.internal.nodefeature.NodeFeature
allowsChanges, attachPotentialChild, detatchPotentialChild, getNode, onAttach

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - NodeList
```
protected NodeList(StateNode node)
```
    Creates a new list for the given node.
    
    Parameters:
    
    node - the node that the list belongs to
- Method Detail
  - size
```
protected int size()
```
    Gets the number of items in this list.
    
    Returns:
    
    the number of items
  - get
```
protected T get(int index)
```
    Gets the item at the given index.
    
    Parameters:
    
    index - the of the desired item
    
    Returns:
    
    the item at the given index
  - add
```
protected void add(T item)
```
    Adds an item to the end of the list.
    
    Parameters:
    
    item - the item to add
  - addAll
```
protected void addAll(Collection<? extends T> items)
```
    Adds all provided items to the end of the list.
    
    Parameters:
    
    items - a collection of items to add, not null
  - add
```
protected void add(int index,
                   T item)
```
    Inserts an item at the given index of the list.
    
    Parameters:
    
    index - index to insert at
    
    item - the item to insert
  - remove
```
protected T remove(int index)
```
    Removes the item at the given index.
    
    Parameters:
    
    index - index of the item to remove
    
    Returns:
    
    the element previously at the specified position
  - getChangeTracker
```
protected List<AbstractListChange<T>> getChangeTracker()
```
    Gets or creates the list used to track changes that should be sent to the client.
    This method is non-private for testing purposes.
    
    Returns:
    
    the list to track changes in
  - collectChanges
```
public void collectChanges(Consumer<NodeChange> collector)
```
    Description copied from class: NodeFeature
    
    Collects all changes that are recorded for this feature.
    
    Specified by:
    
    collectChanges in class NodeFeature
    
    Parameters:
    
    collector - a consumer accepting node changes
  - forEachChild
```
public void forEachChild(Consumer<StateNode> action)
```
    Description copied from class: NodeFeature
    
    Passes each child node instance to the given consumer.
    
    Specified by:
    
    forEachChild in class NodeFeature
    
    Parameters:
    
    action - the consumer that accepts each child
  - generateChangesFromEmpty
```
public void generateChangesFromEmpty()
```
    Description copied from class: NodeFeature
    
    Generates all changes that would be needed to take this node from its initial empty state to its current state.
    
    Specified by:
    
    generateChangesFromEmpty in class NodeFeature
  - isNodeValues
```
protected boolean isNodeValues()
```
    Checks whether this list contains node values.
    
    Returns:
    
    true if this list contains node values; false if this list contains primitive values
  - clear
```
protected void clear()
```
    Removes all nodes, including those not known by the server.
  - indexOf
```
protected int indexOf(T value)
```
    Gets the position of a value in the list.
    
    Parameters:
    
    value - the value to look for
    
    Returns:
    
    the position in the list or -1 if not found
  - iterator
```
protected Iterator<T> iterator()
```
    Gets an iterator returning all items in this list.
    
    Returns:
    
    an iterator returning all items
  - onDetach
```
public void onDetach()
```
    Description copied from class: NodeFeature
    
    Called when the state node has been detached from the state tree.
    
    Overrides:
    
    onDetach in class NodeFeature

Class NodeList<T extends Serializable>

Nested Class Summary

Constructor Summary

Method Summary

Methods inherited from class com.vaadin.flow.internal.nodefeature.NodeFeature

Methods inherited from class java.lang.Object

Constructor Detail

NodeList

Method Detail

size

get

add

addAll

add

remove

getChangeTracker

collectChanges

forEachChild

generateChangesFromEmpty

isNodeValues

clear

indexOf

iterator

onDetach