org.apache.sysds.runtime.privacy.propagation

Class MatrixMultiplicationPropagator

java.lang.Object

org.apache.sysds.runtime.privacy.propagation.MatrixMultiplicationPropagator

All Implemented Interfaces:

Propagator

Direct Known Subclasses:

MatrixMultiplicationPropagatorNaive, MatrixMultiplicationPropagatorPrivateFirst, MatrixMultiplicationPropagatorPrivateFirstOptimized

public abstract class MatrixMultiplicationPropagator
extends Object
implements Propagator

Used for propagating constraints in a matrix multiplication.

Constructor Summary

Constructors

Constructor and Description
MatrixMultiplicationPropagator() Constructor for empty instance.
MatrixMultiplicationPropagator(MatrixBlock input1, PrivacyConstraint privacyConstraint1, MatrixBlock input2, PrivacyConstraint privacyConstraint2) Constructs the propagator and initializes the fields used for propagation.

Method Summary

Modifier and Type	Method and Description
OperatorType[]	getOperatorTypesCol() Gets the operator types of all columns of the right-hand input in the matrix multiplication.
OperatorType[]	getOperatorTypesRow() Gets the operator types of all rows of the left-hand input in the matrix multiplication.
PrivacyConstraint	propagate() Activates the propagation and returns the output privacy constraint.
void	setFields(MatrixBlock input1, PrivacyConstraint privacyConstraint1, MatrixBlock input2, PrivacyConstraint privacyConstraint2) Sets all fields of propagator.

Methods inherited from class java.lang.Object

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

Constructor Detail

MatrixMultiplicationPropagator

public MatrixMultiplicationPropagator()

Constructor for empty instance. The fields can later be set with the setFields method.

MatrixMultiplicationPropagator

public MatrixMultiplicationPropagator(MatrixBlock input1,
                                      PrivacyConstraint privacyConstraint1,
                                      MatrixBlock input2,
                                      PrivacyConstraint privacyConstraint2)

Constructs the propagator and initializes the fields used for propagation.

Parameters:

input1 - left-hand input in matrix multiplication.

privacyConstraint1 - privacy constraint of left-hand input in matrix multiplication

input2 - right-hand input in matrix multiplication

privacyConstraint2 - privacy constraint of right-hand input in matrix multiplication

Method Detail

setFields

public void setFields(MatrixBlock input1,
                      PrivacyConstraint privacyConstraint1,
                      MatrixBlock input2,
                      PrivacyConstraint privacyConstraint2)

Sets all fields of propagator.

Parameters:

input1 - left-hand input in matrix multiplication.

privacyConstraint1 - privacy constraint of left-hand input in matrix multiplication

input2 - right-hand input in matrix multiplication

privacyConstraint2 - privacy constraint of right-hand input in matrix multiplication

propagate

public PrivacyConstraint propagate()

Description copied from interface: Propagator

Activates the propagation and returns the output privacy constraint.

Specified by:

propagate in interface Propagator

Returns:

output privacy constraint.

getOperatorTypesRow

public OperatorType[] getOperatorTypesRow()

Gets the operator types of all rows of the left-hand input in the matrix multiplication. An operator type defines if the row will result in an aggregation or not.

Returns:

array of operator types representing the rows of the left-hand input in the matrix multiplication

getOperatorTypesCol

public OperatorType[] getOperatorTypesCol()

Gets the operator types of all columns of the right-hand input in the matrix multiplication. An operator type defines if the column will result in an aggregation or not.

Returns:

array of operator types representing the columns of the right-hand input in the matrix multiplication.