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62 lignes
1.8 KiB
62 lignes
1.8 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 <utility>
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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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using FieldSliceArray = std::vector<std::pair<Slice, Slice>>;
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std::string SerializeValue(const FieldArray& fields);
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std::string SerializeValue(const FieldSliceArray& fields);
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FieldArray *ParseValue(const std::string& value_str, FieldArray *fields);
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class InternalFieldArray {
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public:
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using FieldMap = std::map<std::string,Slice>;
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InternalFieldArray(const FieldArray &fields, bool to_map = false):
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fields(fields),isMapped(false) {
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if(to_map) Map();
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}
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InternalFieldArray(const Slice value_slice) {
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Slice valueSlice = value_slice;
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Slice nameSlice, valSlice;
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while(GetLengthPrefixedSlice(&valueSlice, &nameSlice)) {
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if(GetLengthPrefixedSlice(&valueSlice, &valSlice)) {
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map[nameSlice.ToString()] = valSlice;
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} else {
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std::cout << "name and val not match! From InternalFieldArray" << 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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isMapped = true;
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}
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InternalFieldArray(const std::string& value_str)
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:leveldb::InternalFieldArray(Slice(value_str)) {}
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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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Slice ValOfName(const std::string& name);
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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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