| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.sysds.runtime.privacy; |
| |
| import org.apache.sysds.api.DMLException; |
| import org.apache.sysds.parser.Expression; |
| import org.apache.sysds.parser.StringIdentifier; |
| import org.apache.sysds.runtime.privacy.PrivacyConstraint.PrivacyLevel; |
| import org.apache.sysds.runtime.privacy.finegrained.DataRange; |
| import org.apache.sysds.runtime.privacy.finegrained.FineGrainedPrivacy; |
| import org.apache.wink.json4j.JSON; |
| import org.apache.wink.json4j.JSONArray; |
| import org.apache.wink.json4j.JSONArtifact; |
| import org.apache.wink.json4j.JSONException; |
| import org.apache.wink.json4j.JSONObject; |
| |
| public class PrivacyUtils { |
| |
| /** |
| * Returns true if the privacy constraint is not null and the privacy level is set to Private or PrivateAggregation. |
| * This only works for the general privacy levels, the fine-grained constraints are not checked! |
| * @param constraint to check |
| * @return true if the privacy constraint is not null and activated |
| */ |
| public static boolean privacyConstraintActivated(PrivacyConstraint constraint){ |
| return constraint != null && |
| (constraint.getPrivacyLevel() == PrivacyLevel.Private |
| || constraint.getPrivacyLevel() == PrivacyLevel.PrivateAggregation); |
| } |
| |
| /** |
| * Returns true if the privacy constraint is not null and it has fine-grained constraints. |
| * @param constraint to check |
| * @return true if the privacy constraint is not null and has fine-grained constraints |
| */ |
| public static boolean privacyConstraintFineGrainedActivated(PrivacyConstraint constraint){ |
| return constraint != null && constraint.getFineGrainedPrivacy().hasConstraints(); |
| } |
| |
| /** |
| * Returns true if some constraints are set for either of two input privacy constraints. |
| * This only checks first two elements in privacy constraint array. |
| * @param privacyConstraints input privacy constraints |
| * @return true if one of the two constraints are activated |
| */ |
| public static boolean someConstraintSetBinary(PrivacyConstraint... privacyConstraints){ |
| return privacyConstraints != null && |
| ((privacyConstraints[0] != null && privacyConstraints[0].hasConstraints()) |
| || (privacyConstraints[1] != null && privacyConstraints[1].hasConstraints())); |
| } |
| |
| /** |
| * Returns true if the constraint is set for the input privacy constraint. |
| * @param privacyConstraint input to check |
| * @return true if any constraint is activated |
| */ |
| public static boolean someConstraintSetUnary(PrivacyConstraint privacyConstraint){ |
| return privacyConstraint != null && privacyConstraint.hasConstraints(); |
| } |
| |
| public static PrivacyLevel getGeneralPrivacyLevel(PrivacyConstraint privacyConstraint){ |
| if ( privacyConstraint != null ){ |
| return privacyConstraint.getPrivacyLevel(); |
| } |
| else return PrivacyLevel.None; |
| } |
| |
| public static PrivacyLevel[] getGeneralPrivacyLevels(PrivacyConstraint[] privacyConstraints){ |
| PrivacyLevel[] privacyLevels = new PrivacyLevel[privacyConstraints.length]; |
| for ( int i = 0; i < privacyConstraints.length; i++) |
| privacyLevels[i] = getGeneralPrivacyLevel(privacyConstraints[i]); |
| return privacyLevels; |
| } |
| |
| public static void setFineGrainedPrivacy(PrivacyConstraint privacyConstraint, Expression eFineGrainedPrivacy){ |
| FineGrainedPrivacy fineGrainedPrivacy = privacyConstraint.getFineGrainedPrivacy(); |
| StringIdentifier fgPrivacyIdentifier = (StringIdentifier) eFineGrainedPrivacy; |
| String fgPrivacyValue = fgPrivacyIdentifier.getValue(); |
| try { |
| putFineGrainedConstraintsFromString(fineGrainedPrivacy, fgPrivacyValue); |
| } catch (JSONException exception){ |
| throw new DMLException("JSONException: " + exception); |
| } |
| privacyConstraint.setFineGrainedPrivacyConstraints(fineGrainedPrivacy); |
| } |
| |
| public static void putFineGrainedConstraintsFromString(FineGrainedPrivacy fineGrainedPrivacy, String fgPrivacyValue) |
| throws JSONException { |
| JSONArtifact fgPrivacyJson = JSON.parse(fgPrivacyValue); |
| JSONObject fgPrivacyObject = (JSONObject)fgPrivacyJson; |
| JSONArray keys = fgPrivacyObject.names(); |
| for ( int i = 0; i < keys.length(); i++ ){ |
| String key = keys.getString(i); |
| putFineGrainedConstraint(fgPrivacyObject, fineGrainedPrivacy, key); |
| } |
| } |
| |
| private static void putFineGrainedConstraint(JSONObject fgPrivacyObject, FineGrainedPrivacy fineGrainedPrivacy, String key) |
| throws JSONException { |
| JSONArray privateArray = fgPrivacyObject.getJSONArray(key); |
| for (Object range : privateArray.toArray()){ |
| DataRange dataRange = getDataRangeFromObject(range); |
| fineGrainedPrivacy.put(dataRange, PrivacyLevel.valueOf(key)); |
| } |
| } |
| |
| private static DataRange getDataRangeFromObject(Object range) throws JSONException { |
| JSONArray beginDims = ((JSONArray)range).getJSONArray(0); |
| JSONArray endDims = ((JSONArray)range).getJSONArray(1); |
| long[] beginDimsLong = new long[beginDims.length()]; |
| long[] endDimsLong = new long[endDims.length()]; |
| for ( int dimIndex = 0; dimIndex < beginDims.length(); dimIndex++ ){ |
| beginDimsLong[dimIndex] = beginDims.getLong(dimIndex); |
| endDimsLong[dimIndex] = endDims.getLong(dimIndex); |
| } |
| return new DataRange(beginDimsLong, endDimsLong); |
| } |
| } |