org.oakgp.node.walk

Class StrategyWalk

java.lang.Object

org.oakgp.node.walk.StrategyWalk

public final class StrategyWalk
extends Object

Provides a mechanism for recursively visiting nodes in a tree structure, controlled by a user-defined strategy.

Method Summary

Modifier and Type	Method and Description
static Node	getAt(Node node, int index, Predicate<Node> treeWalkerStrategy) Returns a Node from the tree structure represented by the given Node that matches the specified predicate.
static int	getNodeCount(Node node, Predicate<Node> treeWalkerStrategy) Returns the total number of nodes contained in the tree-structure represented by the given Node that match the specified predicate.
static Node	replaceAt(Node node, int index, Function<Node,Node> replacement, Predicate<Node> treeWalkerStrategy) Returns a new Node resulting from replacing the Node at position index of the given Node with the result of replacement.

Methods inherited from class java.lang.Object

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

Method Detail

getNodeCount

public static int getNodeCount(Node node,
                               Predicate<Node> treeWalkerStrategy)

Returns the total number of nodes contained in the tree-structure represented by the given Node that match the specified predicate.

Parameters:

treeWalkerStrategy - the predicate used to determine if a Node should be included in the count

getAt

public static Node getAt(Node node,
                         int index,
                         Predicate<Node> treeWalkerStrategy)

Returns a Node from the tree structure represented by the given Node that matches the specified predicate.

replaceAt

public static Node replaceAt(Node node,
                             int index,
                             Function<Node,Node> replacement,
                             Predicate<Node> treeWalkerStrategy)

Returns a new Node resulting from replacing the Node at position index of the given Node with the result of replacement.

Parameters:

index - the index of the Node, in the tree structure represented by this object, that needs to be replaced

replacement - the function to apply to the Node at index to determine the Node that should replace it

Returns:

a new Node derived from replacing the Node at index with the result of replacement