org.apache.sysds.runtime.privacy.propagation

Class PrivacyPropagator

java.lang.Object

org.apache.sysds.runtime.privacy.propagation.PrivacyPropagator

public class PrivacyPropagator
extends Object

Class with static methods merging privacy constraints of operands in expressions to generate the privacy constraints of the output.

Constructor Summary

Constructors

Constructor and Description
PrivacyPropagator()

Method Summary

Modifier and Type	Method and Description
static PrivacyConstraint.PrivacyLevel	corePropagation(PrivacyConstraint.PrivacyLevel[] inputLevels, OperatorType operatorType) Returns the output privacy level based on the given input privacy levels and operator type.
static PrivacyConstraint	mergeBinary(PrivacyConstraint privacyConstraint1, PrivacyConstraint privacyConstraint2)
static PrivacyConstraint	mergeNary(PrivacyConstraint[] privacyConstraints)
static PrivacyConstraint	mergeNary(PrivacyConstraint[] privacyConstraints, OperatorType operatorType)
static Data	parseAndSetPrivacyConstraint(Data cd, org.apache.wink.json4j.JSONObject mtd)
static void	postProcessInstruction(Instruction inst, ExecutionContext ec)
static Instruction	preprocessBinaryCPInstruction(BinaryCPInstruction inst, ExecutionContext ec)
static Instruction	preprocessBuiltinNary(BuiltinNaryCPInstruction inst, ExecutionContext ec)
static Instruction	preprocessCPInstructionFineGrained(CPInstruction inst, ExecutionContext ec)
static Instruction	preprocessExternal(FunctionCallCPInstruction inst, ExecutionContext ec)
static Instruction	preprocessInstruction(Instruction inst, ExecutionContext ec)
static Instruction	preprocessInstructionSimple(Instruction inst, ExecutionContext ec) Throw exception if privacy constraints are activated or return instruction if privacy is not activated
static Instruction	preprocessMultiReturn(ComputationCPInstruction inst, ExecutionContext ec)
static Instruction	preprocessParameterizedBuiltin(ParameterizedBuiltinCPInstruction inst, ExecutionContext ec)
static Instruction	preprocessQuaternary(QuaternaryCPInstruction inst, ExecutionContext ec)
static Instruction	preprocessTernaryCPInstruction(ComputationCPInstruction inst, ExecutionContext ec)
static Instruction	preprocessUnaryCPInstruction(UnaryCPInstruction inst, ExecutionContext ec)
static Instruction	preprocessVariableCPInstruction(VariableCPInstruction inst, ExecutionContext ec)

Methods inherited from class java.lang.Object

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

Constructor Detail

PrivacyPropagator

public PrivacyPropagator()

Method Detail

parseAndSetPrivacyConstraint

public static Data parseAndSetPrivacyConstraint(Data cd,
                                                org.apache.wink.json4j.JSONObject mtd)
                                         throws org.apache.wink.json4j.JSONException

Throws:

org.apache.wink.json4j.JSONException

corePropagation

public static PrivacyConstraint.PrivacyLevel corePropagation(PrivacyConstraint.PrivacyLevel[] inputLevels,
                                                             OperatorType operatorType)

Returns the output privacy level based on the given input privacy levels and operator type. It represents the basic logic of privacy propagation: Unary input: Input | NonAggregate | Aggregate ----------------------------------- priv | priv | priv privAgg | privAgg | none none | none | none Binary input: Input | NonAggregate | Aggregate -------------------------------------------- priv-priv | priv | priv priv-privAgg | priv | priv priv-none | priv | priv privAgg-priv | priv | priv none-priv | priv | priv privAgg-privAgg | privAgg | none none-none | none | none privAgg-none | privAgg | none none-privAgg | privAgg | none

Parameters:

inputLevels - privacy levels of the input

operatorType - type of the operator which is either an aggregation (Aggregate) or not an aggregation (NonAggregate)

Returns:

output privacy level

mergeNary

public static PrivacyConstraint mergeNary(PrivacyConstraint[] privacyConstraints,
                                          OperatorType operatorType)

mergeBinary

public static PrivacyConstraint mergeBinary(PrivacyConstraint privacyConstraint1,
                                            PrivacyConstraint privacyConstraint2)

mergeNary

public static PrivacyConstraint mergeNary(PrivacyConstraint[] privacyConstraints)

preprocessInstruction

public static Instruction preprocessInstruction(Instruction inst,
                                                ExecutionContext ec)

preprocessCPInstructionFineGrained

public static Instruction preprocessCPInstructionFineGrained(CPInstruction inst,
                                                             ExecutionContext ec)

preprocessBinaryCPInstruction

public static Instruction preprocessBinaryCPInstruction(BinaryCPInstruction inst,
                                                        ExecutionContext ec)

preprocessInstructionSimple

public static Instruction preprocessInstructionSimple(Instruction inst,
                                                      ExecutionContext ec)

Throw exception if privacy constraints are activated or return instruction if privacy is not activated

Parameters:

inst - instruction

ec - execution context

Returns:

instruction

preprocessExternal

public static Instruction preprocessExternal(FunctionCallCPInstruction inst,
                                             ExecutionContext ec)

preprocessMultiReturn

public static Instruction preprocessMultiReturn(ComputationCPInstruction inst,
                                                ExecutionContext ec)

preprocessParameterizedBuiltin

public static Instruction preprocessParameterizedBuiltin(ParameterizedBuiltinCPInstruction inst,
                                                         ExecutionContext ec)

preprocessBuiltinNary

public static Instruction preprocessBuiltinNary(BuiltinNaryCPInstruction inst,
                                                ExecutionContext ec)

preprocessQuaternary

public static Instruction preprocessQuaternary(QuaternaryCPInstruction inst,
                                               ExecutionContext ec)

preprocessTernaryCPInstruction

public static Instruction preprocessTernaryCPInstruction(ComputationCPInstruction inst,
                                                         ExecutionContext ec)

preprocessUnaryCPInstruction

public static Instruction preprocessUnaryCPInstruction(UnaryCPInstruction inst,
                                                       ExecutionContext ec)

preprocessVariableCPInstruction

public static Instruction preprocessVariableCPInstruction(VariableCPInstruction inst,
                                                          ExecutionContext ec)

postProcessInstruction

public static void postProcessInstruction(Instruction inst,
                                          ExecutionContext ec)