| // |
| // Copyright 2021 Google LLC |
| // |
| // Licensed 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 pbeam |
| |
| import "github.com/google/differential-privacy/go/v2/noise" |
| |
| // noNoise is a Noise instance that doesn't add noise to the data, and has a |
| // threshold of 0. Used as the noise type only when testMode is enabled in PrivacySpec. |
| type noNoise struct{} |
| |
| func (noNoise) AddNoiseInt64(x, _, _ int64, _, _ float64) (int64, error) { |
| return x, nil |
| } |
| |
| func (noNoise) AddNoiseFloat64(x float64, _ int64, _, _, _ float64) (float64, error) { |
| return x, nil |
| } |
| |
| func (noNoise) Threshold(_ int64, _, _, _, _ float64) (float64, error) { |
| return 0.0, nil |
| } |
| |
| func (noNoise) ComputeConfidenceIntervalInt64(noisedX, _, _ int64, _, _, _ float64) (noise.ConfidenceInterval, error) { |
| return noise.ConfidenceInterval{LowerBound: float64(noisedX), UpperBound: float64(noisedX)}, nil |
| } |
| |
| func (noNoise) ComputeConfidenceIntervalFloat64(noisedX float64, _ int64, _, _, _, _ float64) (noise.ConfidenceInterval, error) { |
| return noise.ConfidenceInterval{LowerBound: noisedX, UpperBound: noisedX}, nil |
| } |
| |
| type testMode int |
| |
| const ( |
| disabled testMode = iota // Default |
| noNoiseWithContributionBounding |
| noNoiseWithoutContributionBounding |
| ) |
| |
| func (tm testMode) isEnabled() bool { |
| return tm != disabled |
| } |