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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include "common/memory_image/data-store.h"
     18 
     19 #include "util/base/logging.h"
     20 
     21 namespace libtextclassifier {
     22 namespace nlp_core {
     23 namespace memory_image {
     24 
     25 DataStore::DataStore(StringPiece bytes)
     26     : reader_(bytes.data(), bytes.size()) {
     27   if (!reader_.success_status()) {
     28     TC_LOG(ERROR) << "Unable to successfully initialize DataStore.";
     29   }
     30 }
     31 
     32 DataBlobView DataStore::GetData(const std::string &name) const {
     33   if (!reader_.success_status()) {
     34     TC_LOG(ERROR) << "DataStore::GetData(" << name << ") "
     35                   << "called on invalid DataStore; will return empty data "
     36                   << "chunk";
     37     return DataBlobView();
     38   }
     39 
     40   const auto &entries = reader_.trimmed_proto().entries();
     41   const auto &it = entries.find(name);
     42   if (it == entries.end()) {
     43     TC_LOG(ERROR) << "Unknown key: " << name
     44                   << "; will return empty data chunk";
     45     return DataBlobView();
     46   }
     47 
     48   const DataStoreEntryBytes &entry_bytes = it->second;
     49   if (!entry_bytes.has_blob_index()) {
     50     TC_LOG(ERROR) << "DataStoreEntryBytes with no blob_index; "
     51                   << "will return empty data chunk.";
     52     return DataBlobView();
     53   }
     54 
     55   int blob_index = entry_bytes.blob_index();
     56   return reader_.data_blob_view(blob_index);
     57 }
     58 
     59 }  // namespace memory_image
     60 }  // namespace nlp_core
     61 }  // namespace libtextclassifier
     62