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Side by Side Diff: components/rappor/rappor_metric.h

Issue 49753002: RAPPOR implementation (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 6 years, 10 months ago
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1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef COMPONENTS_RAPPOR_RAPPOR_H_
6 #define COMPONENTS_RAPPOR_RAPPOR_H_
7
8 #include <string>
9 #include <vector>
10
11 #include "components/rappor/bloom_filter.h"
12 #include "components/rappor/byte_vector_utils.h"
13 #include "components/rappor/rappor_parameters.h"
14
15 namespace rappor {
16
17 // A RapporMetric is an object that collects string samples into a Bloom filter,
18 // and generates randomized reports about the collected data.
19 //
20 // For a full description of the rappor metrics, see
21 // http://www.chromium.org/developers/design-documents/rappor
22 class RapporMetric {
23 public:
24 explicit RapporMetric(const RapporParameters& parameters, int32_t cohort);
25 ~RapporMetric();
26
27 // Record additional samples in the Bloom filter.
28 void AddSample(const std::string& str);
29
30 // Retrieves the current Bloom filter bits.
31 const ByteVector& bytes() const { return bloom_.bytes(); }
32
33 // Gets the parameter values this metric was constructed with.
34 const RapporParameters* parameters() const { return &parameters_; }
35
36 // Generates the bits to report for this metric. Using the secret as a seed,
37 // randomly selects bits for redaction. Then flips coins to generate the
38 // final report bits.
39 ByteVector GetReport(const std::string& secret) const;
40
41 private:
42 const RapporParameters parameters_;
43 BloomFilter bloom_;
44
45 DISALLOW_COPY_AND_ASSIGN(RapporMetric);
46 };
47
48 } // namespace rappor
49
50 #endif // COMPONENTS_RAPPOR_RAPPOR_H_
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