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/*
* Copyright (C) 2014, The Android Open Source Project
*
* 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.
*/
#ifndef LATINIME_ENTRY_COUNTERS_H
#define LATINIME_ENTRY_COUNTERS_H
#include <array>
#include "defines.h"
#include "utils/ngram_utils.h"
namespace latinime {
// Copyable but immutable
class EntryCounts final {
public:
EntryCounts() : mEntryCounts({{0, 0, 0, 0}}) {}
explicit EntryCounts(const std::array<int, MAX_PREV_WORD_COUNT_FOR_N_GRAM + 1> &counters)
: mEntryCounts(counters) {}
int getNgramCount(const NgramType ngramType) const {
return mEntryCounts[static_cast<int>(ngramType)];
}
const std::array<int, MAX_PREV_WORD_COUNT_FOR_N_GRAM + 1> &getCountArray() const {
return mEntryCounts;
}
private:
DISALLOW_ASSIGNMENT_OPERATOR(EntryCounts);
// Counts from Unigram (0-th element) to (MAX_PREV_WORD_COUNT_FOR_N_GRAM + 1)-gram
// (MAX_PREV_WORD_COUNT_FOR_N_GRAM-th element)
const std::array<int, MAX_PREV_WORD_COUNT_FOR_N_GRAM + 1> mEntryCounts;
};
class MutableEntryCounters final {
public:
MutableEntryCounters() {
mEntryCounters.fill(0);
}
explicit MutableEntryCounters(
const std::array<int, MAX_PREV_WORD_COUNT_FOR_N_GRAM + 1> &counters)
: mEntryCounters(counters) {}
const EntryCounts getEntryCounts() const {
return EntryCounts(mEntryCounters);
}
void incrementNgramCount(const NgramType ngramType) {
++mEntryCounters[static_cast<int>(ngramType)];
}
void decrementNgramCount(const NgramType ngramType) {
--mEntryCounters[static_cast<int>(ngramType)];
}
int getNgramCount(const NgramType ngramType) const {
return mEntryCounters[static_cast<int>(ngramType)];
}
void setNgramCount(const NgramType ngramType, const int count) {
mEntryCounters[static_cast<int>(ngramType)] = count;
}
private:
DISALLOW_COPY_AND_ASSIGN(MutableEntryCounters);
// Counters from Unigram (0-th element) to (MAX_PREV_WORD_COUNT_FOR_N_GRAM + 1)-gram
// (MAX_PREV_WORD_COUNT_FOR_N_GRAM-th element)
std::array<int, MAX_PREV_WORD_COUNT_FOR_N_GRAM + 1> mEntryCounters;
};
} // namespace latinime
#endif /* LATINIME_ENTRY_COUNTERS_H */
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