org.cryptimeleon.craco.secretsharing.accessstructure.visitors

Class MonotoneSpanProgramGetMatrixVisitor

java.lang.Object

org.cryptimeleon.craco.secretsharing.accessstructure.visitors.MonotoneSpanProgramGetMatrixVisitor

All Implemented Interfaces:

Visitor<java.lang.Integer>

public class MonotoneSpanProgramGetMatrixVisitor
extends java.lang.Object
implements Visitor<java.lang.Integer>

This visitor calculates the monotone span program matrix for the tree it visits.

Constructor Summary

Constructors

Constructor and Description
MonotoneSpanProgramGetMatrixVisitor(org.cryptimeleon.math.structures.rings.zn.Zp field, java.util.ArrayList<org.cryptimeleon.math.structures.rings.zn.Zp.ZpElement> prefix, java.util.ArrayList<java.util.ArrayList<org.cryptimeleon.math.structures.rings.zn.Zp.ZpElement>> matrix)

Method Summary

Modifier and Type	Method and Description
java.lang.Integer	getResultOfCurrentNode() Returns the value that was calculated during Visitor.visit(TreeNode).
MonotoneSpanProgramGetMatrixVisitor	getVisitorForNextChild() Returns a visitor for the next child.
void	putResultOfChild(java.lang.Integer 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.

Methods inherited from class java.lang.Object

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

Constructor Detail

MonotoneSpanProgramGetMatrixVisitor

public MonotoneSpanProgramGetMatrixVisitor(org.cryptimeleon.math.structures.rings.zn.Zp field,
                                           java.util.ArrayList<org.cryptimeleon.math.structures.rings.zn.Zp.ZpElement> prefix,
                                           java.util.ArrayList<java.util.ArrayList<org.cryptimeleon.math.structures.rings.zn.Zp.ZpElement>> matrix)

Parameters:

field - field over which the monotone span program is calculated

prefix - the values for the columns belong to higher hierarchies

matrix - matrix containing all rows calculated so far and the new rows will be stored in this instance

Method Detail

getResultOfCurrentNode

public java.lang.Integer getResultOfCurrentNode()

Description copied from interface: Visitor

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

Specified by:

getResultOfCurrentNode in interface Visitor<java.lang.Integer>

getVisitorForNextChild

public MonotoneSpanProgramGetMatrixVisitor getVisitorForNextChild()
                                                           throws WrongAccessStructureException

Description copied from interface: Visitor

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.

Specified by:

getVisitorForNextChild in interface Visitor<java.lang.Integer>

Returns:

a visitor of the same kind

Throws:

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

putResultOfChild

public void putResultOfChild(java.lang.Integer input)

Description copied from interface: Visitor

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

Specified by:

putResultOfChild in interface Visitor<java.lang.Integer>

Parameters:

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

visit

public void visit(TreeNode currentNode)

Description copied from interface: Visitor

Performs some kind of computation on the given currentNode.

Specified by:

visit in interface Visitor<java.lang.Integer>

Parameters:

currentNode - node of the threshold tree to visit