org.cryptimeleon.craco.secretsharing.accessstructure.visitors

Interface Visitor<F>

Type Parameters:

F - type of the return value of the function getResultOfCurrentNode()

All Known Implementing Classes:

AccessGrantedVisitor, MinimalFulfillingSubsetVisitor, MonotoneSpanProgramGetMatrixVisitor, ToStringVisitor

public interface Visitor<F>

Interface specifying the methods any visitor for a threshold tree should implement (created out of the extended boolean formula).

Usage of the visitor is done via TreeNode.performVisitor(Visitor).

Method Summary

Modifier and Type	Method and Description
F	getResultOfCurrentNode() Returns the value that was calculated during visit(TreeNode).
Visitor<F>	getVisitorForNextChild() Returns a visitor for the next child.
void	putResultOfChild(F input) Inserts the result of the child of current node, so that the current visitor can calculate its own value from it.
void	visit(TreeNode currentNode) Performs some kind of computation on the given currentNode.

Method Detail

getResultOfCurrentNode

F getResultOfCurrentNode()
                  throws WrongAccessStructureException

Returns the value that was calculated during visit(TreeNode).

Throws:

WrongAccessStructureException - if something is wrong with the access structure being traversed

getVisitorForNextChild

Visitor<F> getVisitorForNextChild()
                           throws WrongAccessStructureException

Returns a visitor for the next child. The resulting visitor is functionally the same, but any state that was mutated while visiting the current child may be reset.

Returns:

a visitor of the same kind

Throws:

WrongAccessStructureException - if something is wrong with the access structure being traversed

putResultOfChild

void putResultOfChild(F input)

Inserts the result of the child of current node, so that the current visitor can calculate its own value from it.

Parameters:

input - the result of visiting the child of the node currently being visited

visit

void visit(TreeNode currentNode)
    throws WrongAccessStructureException

Performs some kind of computation on the given currentNode.

Parameters:

currentNode - node of the threshold tree to visit

Throws:

WrongAccessStructureException - if something is wrong with the access structure being traversed