Package org.apache.tapestry5.tree

# Interface TreeModelAdapter<T>

public interface TreeModelAdapter<T>
Used with `DefaultTreeModel` to define how to extract labels and child nodes from a value.

Since:
  5.3

- ## Method Summary

  Modifier and Type
  Method
  Description
  `List<T>`
  `getChildren(T value)`
  Returns the children, in the order they should be presented to the client.
  `String`
  `getLabel(T value)`
  Returns a text label for the value, which may be presented to the client.
  `boolean`
  `hasChildren(T value)`
  Returns true if the value has children (only invoked for non-leaf values).
  `boolean`
  `isLeaf(T value)`
  Determines if the value is a leaf or a (potential) container of children.

- ## Method Details

  - ### isLeaf

    boolean isLeaf(T value)
    Determines if the value is a leaf or a (potential) container of children.
    See Also:
      - `TreeNode.isLeaf()`

  - ### hasChildren

    boolean hasChildren(T value)
    Returns true if the value has children (only invoked for non-leaf values).
    See Also:
      - `TreeNode.getHasChildren()`

  - ### getChildren

    List<T> getChildren(T value)
    Returns the children, in the order they should be presented to the client. This should return the childen in the correct presentation or, or return null or an empty list.
    See Also:
      - `TreeNode.getChildren()`

  - ### getLabel

    String getLabel(T value)
    Returns a text label for the value, which may be presented to the client.
    See Also:
      - `TreeNode.getLabel()`