// 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. #pragma once #include #include "parquet/types.h" namespace parquet { // Abstract class for hash class Hasher { public: /// Compute hash for 32 bits value by using its plain encoding result. /// /// @param value the value to hash. /// @return hash result. virtual uint64_t Hash(int32_t value) const = 0; /// Compute hash for 64 bits value by using its plain encoding result. /// /// @param value the value to hash. /// @return hash result. virtual uint64_t Hash(int64_t value) const = 0; /// Compute hash for float value by using its plain encoding result. /// /// @param value the value to hash. /// @return hash result. virtual uint64_t Hash(float value) const = 0; /// Compute hash for double value by using its plain encoding result. /// /// @param value the value to hash. /// @return hash result. virtual uint64_t Hash(double value) const = 0; /// Compute hash for Int96 value by using its plain encoding result. /// /// @param value the value to hash. /// @return hash result. virtual uint64_t Hash(const Int96* value) const = 0; /// Compute hash for ByteArray value by using its plain encoding result. /// /// @param value the value to hash. /// @return hash result. virtual uint64_t Hash(const ByteArray* value) const = 0; /// Compute hash for fixed byte array value by using its plain encoding result. /// /// @param value the value address. /// @param len the value length. virtual uint64_t Hash(const FLBA* value, uint32_t len) const = 0; /// Batch compute hashes for 32 bits values by using its plain encoding result. /// /// @param values a pointer to the values to hash. /// @param num_values the number of values to hash. /// @param hashes a pointer to the output hash values, its length should be equal to /// num_values. virtual void Hashes(const int32_t* values, int num_values, uint64_t* hashes) const = 0; /// Batch compute hashes for 64 bits values by using its plain encoding result. /// /// @param values a pointer to the values to hash. /// @param num_values the number of values to hash. /// @param hashes a pointer to the output hash values, its length should be equal to /// num_values. virtual void Hashes(const int64_t* values, int num_values, uint64_t* hashes) const = 0; /// Batch compute hashes for float values by using its plain encoding result. /// /// @param values a pointer to the values to hash. /// @param num_values the number of values to hash. /// @param hashes a pointer to the output hash values, its length should be equal to /// num_values. virtual void Hashes(const float* values, int num_values, uint64_t* hashes) const = 0; /// Batch compute hashes for double values by using its plain encoding result. /// /// @param values a pointer to the values to hash. /// @param num_values the number of values to hash. /// @param hashes a pointer to the output hash values, its length should be equal to /// num_values. virtual void Hashes(const double* values, int num_values, uint64_t* hashes) const = 0; /// Batch compute hashes for Int96 values by using its plain encoding result. /// /// @param values a pointer to the values to hash. /// @param num_values the number of values to hash. /// @param hashes a pointer to the output hash values, its length should be equal to /// num_values. virtual void Hashes(const Int96* values, int num_values, uint64_t* hashes) const = 0; /// Batch compute hashes for ByteArray values by using its plain encoding result. /// /// @param values a pointer to the values to hash. /// @param num_values the number of values to hash. /// @param hashes a pointer to the output hash values, its length should be equal to /// num_values. virtual void Hashes(const ByteArray* values, int num_values, uint64_t* hashes) const = 0; /// Batch compute hashes for fixed byte array values by using its plain encoding result. /// /// @param values the value address. /// @param type_len the value length. /// @param num_values the number of values to hash. /// @param hashes a pointer to the output hash values, its length should be equal to /// num_values. virtual void Hashes(const FLBA* values, uint32_t type_len, int num_values, uint64_t* hashes) const = 0; virtual ~Hasher() = default; }; } // namespace parquet