/Users/deen/code/yugabyte-db/src/yb/common/key_encoder.cc

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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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.
//
// The following only applies to changes made to this file as part of YugaByte development.
//
// Portions Copyright (c) YugaByte, Inc.
//
// 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 <functional>
#include <string>
#include <vector>


#include "yb/common/common.pb.h"
#include "yb/common/key_encoder.h"
#include "yb/gutil/map-util.h"
#include "yb/gutil/singleton.h"
#include "yb/util/faststring.h"

using std::shared_ptr;
using std::unordered_map;

namespace yb {


// A resolver for Encoders
template <typename Buffer>
class EncoderResolver {
 public:
  const KeyEncoder<Buffer>& GetKeyEncoder(DataType t) {
    return *FindOrDie(encoders_, t);
  }

  const bool HasKeyEncoderForType(DataType t) {
    return ContainsKey(encoders_, t);
  }

 private:
  EncoderResolver<Buffer>() {
    AddMapping<BOOL>();
    AddMapping<UINT8>();
    AddMapping<INT8>();
    AddMapping<UINT16>();
    AddMapping<INT16>();
    AddMapping<UINT32>();
    AddMapping<INT32>();
    AddMapping<UINT64>();
    AddMapping<INT64>();
    AddMapping<BINARY>();
    AddMapping<FLOAT>();
    AddMapping<DOUBLE>();
  }

  template<DataType Type> void AddMapping() {
    KeyEncoderTraits<Type, Buffer> traits;
    encoders_.emplace(Type, std::make_shared<KeyEncoder<Buffer>>(traits));
  }

  friend class Singleton<EncoderResolver<Buffer> >;
  unordered_map<DataType, shared_ptr<KeyEncoder<Buffer> >, std::hash<size_t> > encoders_;
};

template <typename Buffer>
const KeyEncoder<Buffer>& GetKeyEncoder(const TypeInfo* typeinfo) {
  return Singleton<EncoderResolver<Buffer> >::get()->GetKeyEncoder(typeinfo->physical_type);
}

// Returns true if the type is allowed in keys.
bool IsTypeAllowableInKey(const TypeInfo* typeinfo) {
  return Singleton<EncoderResolver<faststring> >::get()->HasKeyEncoderForType(
      typeinfo->physical_type);
}

//------------------------------------------------------------
//// Template instantiations: We instantiate all possible templates to avoid linker issues.
//// see: https://isocpp.org/wiki/faq/templates#separate-template-fn-defn-from-decl
////------------------------------------------------------------

template
const KeyEncoder<string>& GetKeyEncoder(const TypeInfo* typeinfo);

template
const KeyEncoder<faststring>& GetKeyEncoder(const TypeInfo* typeinfo);

}  // namespace yb

YugabyteDB (2.13.1.0-b60, 21121d69985fbf76aa6958d8f04a9bfa936293b5)

Coverage Report

Created: 2022-03-22 16:43