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56 行
1.4 KiB
56 行
1.4 KiB
#ifndef STORAGE_LEVELDB_UTIL_SERIALIZE_VALUE_H_
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#define STORAGE_LEVELDB_UTIL_SERIALIZE_VALUE_H_
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#include <iostream>
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#include <string>
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#include <vector>
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#include <map>
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#include "leveldb/slice.h"
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#include "util/coding.h"
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namespace leveldb{
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using Field = std::pair<std::string, std::string>; // field_name:field_value
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using FieldArray = std::vector<std::pair<std::string, std::string>>;
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std::string SerializeValue(const FieldArray& fields);
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FieldArray *ParseValue(const std::string& value_str);
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class InternalFieldArray {
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public:
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using FieldMap = std::map<std::string,std::string>;
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InternalFieldArray(const FieldArray &fields, bool to_map = false):fields(fields),isMapped(false) {
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if(to_map) Map();
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}
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InternalFieldArray(const std::string& value_str) {
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Slice valueSlice(value_str);
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Slice nameSlice,valSlice;
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while(GetLengthPrefixedSlice(&valueSlice, &nameSlice)) {
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if(GetLengthPrefixedSlice(&valueSlice, &valueSlice)) {
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map[nameSlice.ToString()] = valueSlice.ToString();
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} else {
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std::cout << "name and val not match!" << std::endl;
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}
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nameSlice.clear();
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valSlice.clear();
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}
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}
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InternalFieldArray(const Slice& slice):leveldb::InternalFieldArray(slice.ToString()) {}
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//将vector变为用map存
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void Map();
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std::string Serialize();
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bool HasField(const Field& field);
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private:
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bool isMapped;
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const FieldArray fields;
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FieldMap map;
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};
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}
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#endif
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