| /* |
| * Copyright (C) 2018 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. |
| */ |
| |
| #include "annotator/vocab/vocab-level-table.h" |
| |
| #include <cstddef> |
| #include <memory> |
| |
| #include "annotator/model_generated.h" |
| #include "utils/base/endian.h" |
| #include "utils/container/bit-vector.h" |
| #include "utils/optional.h" |
| #include "marisa/trie.h" |
| |
| namespace libtextclassifier3 { |
| |
| std::unique_ptr<VocabLevelTable> VocabLevelTable::Create( |
| const VocabModel* model) { |
| if (!LittleEndian::IsLittleEndian()) { |
| // TODO(tonymak) Consider making this work on a big endian device. |
| TC3_LOG(ERROR) |
| << "VocabLevelTable is only working on a little endian device."; |
| return nullptr; |
| } |
| const flatbuffers::Vector<uint8_t>* trie_data = model->vocab_trie(); |
| if (trie_data == nullptr) { |
| TC3_LOG(ERROR) << "vocab_trie is missing from the model file."; |
| return nullptr; |
| } |
| std::unique_ptr<marisa::Trie> vocab_trie(new marisa::Trie); |
| vocab_trie->map(trie_data->data(), trie_data->size()); |
| |
| return std::unique_ptr<VocabLevelTable>(new VocabLevelTable( |
| model, std::move(vocab_trie), BitVector(model->beginner_level()), |
| BitVector(model->do_not_trigger_in_upper_case()))); |
| } |
| |
| VocabLevelTable::VocabLevelTable(const VocabModel* model, |
| std::unique_ptr<marisa::Trie> vocab_trie, |
| const BitVector beginner_level, |
| const BitVector do_not_trigger_in_upper_case) |
| : model_(model), |
| vocab_trie_(std::move(vocab_trie)), |
| beginner_level_(beginner_level), |
| do_not_trigger_in_upper_case_(do_not_trigger_in_upper_case) {} |
| |
| Optional<LookupResult> VocabLevelTable::Lookup(const std::string& vocab) const { |
| marisa::Agent agent; |
| agent.set_query(vocab.data(), vocab.size()); |
| if (vocab_trie_->lookup(agent)) { |
| const int vector_idx = agent.key().id(); |
| return Optional<LookupResult>({beginner_level_[vector_idx], |
| do_not_trigger_in_upper_case_[vector_idx]}); |
| } |
| return Optional<LookupResult>(); |
| } |
| } // namespace libtextclassifier3 |