org.ametys.cms.search.advanced

Class AbstractTreeNode<T>

java.lang.Object

org.ametys.cms.search.advanced.AbstractTreeNode<T>

Type Parameters:

T - the type of the values of the leaves of the tree.

Direct Known Subclasses:

TreeInternalNode, TreeLeaf

public abstract class AbstractTreeNode<T>
extends Object

This abstract class represents a node in a tree data structure.
There are only two allowed sublcasses: TreeLeaf and TreeInternalNode

Constructor Summary

Constructors

Constructor and Description
AbstractTreeNode()

Method Summary

Modifier and Type	Method and Description
Collection<TreeLeaf<T>>	getFlatLeaves() Gets all leaves of this tree node, recursively flattened.
static <T,R> R	walk(AbstractTreeNode<T> tree, Function<TreeLeaf<T>,R> leafFunction, BiFunction<Stream<R>,Query.LogicalOperator,R> internalNodeFunction) Generic helper method to walk a tree (i.e.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractTreeNode

public AbstractTreeNode()

Method Detail

walk

public static <T,R> R walk(AbstractTreeNode<T> tree,
                           Function<TreeLeaf<T>,R> leafFunction,
                           BiFunction<Stream<R>,Query.LogicalOperator,R> internalNodeFunction)

Generic helper method to walk a tree (i.e. traverse a tree) for visiting each node and doing a recursive treatment
This is a post-order walk (the children are traversed before their respective parents are traversed)
See also this link

Type Parameters:

T - the type of the values of the leaves of the given tree

R - the type of the object returned by this method.

Parameters:

tree - The tree to walk

leafFunction - The operation to perform for a leaf

internalNodeFunction - The operation to perform for an internal node.
This function takes two arguments:

• the results for each child as a stream;
• the logical operator of the internal node

Returns:

a result

getFlatLeaves

public Collection<TreeLeaf<T>> getFlatLeaves()

Gets all leaves of this tree node, recursively flattened.

Returns:

the flattened leaves