1.添加特征值model。

Database/CMakeLists.txt

@@ -1,5 +1,6 @@
 add_library(Database
     Database.h Database.cpp
+    DataStructure.h DataStructure.cpp
     # shell.c
     sqlite3.h sqlite3.c
     sqlite3ext.h

Database/DataStructure.cpp

@@ -0,0 +1,5 @@
+#include "DataStructure.h"
+
+bool operator==(const PalmFeature &lhs, const PalmFeature &rhs) {
+    return lhs.feature == rhs.feature;
+}

Database/DataStructure.h

@@ -0,0 +1,23 @@
+#ifndef __DATASTRUCTURE_H__
+#define __DATASTRUCTURE_H__
+
+#include <string>
+#include <vector>
+
+class PalmFeature {
+public:
+    int64_t id; // 对应本地数据库的id
+    std::string username;
+    std::vector<uint8_t> feature;
+};
+
+using PalmFeatures = std::vector<PalmFeature>;
+
+bool operator==(const PalmFeature &lhs, const PalmFeature &rhs);
+
+namespace std {
+template <>
+struct hash<PalmFeature> {};
+} // namespace std
+
+#endif // __DATASTRUCTURE_H__

Database/Database.cpp

@@ -23,8 +23,8 @@ bool Database::addPalmFeature(const PalmFeature &palm) {
     return true;
 }
 
-std::vector<PalmFeature> Database::palmFeatures() const {
-    std::vector<PalmFeature> ret;
+PalmFeatures Database::palmFeatures() const {
+    PalmFeatures ret;
     sqlite3_stmt *statement = nullptr;
     constexpr const char *sql = "SELECT * FROM palm_feature";
     if (sqlite3_prepare_v2(m_sqlite, sql, -1, &statement, NULL) != SQLITE_OK) {

Database/Database.h

@@ -1,23 +1,16 @@
 #ifndef __DATABASE_H__
 #define __DATABASE_H__
 
-#include <string>
-#include <vector>
+#include "DataStructure.h"
 
 struct sqlite3;
 
-class PalmFeature {
-public:
-    int64_t id; // 对应本地数据库的id
-    std::string username;
-    std::vector<uint8_t> feature;
-};
 
 class Database{
 public:
     bool open(const std::string &path);
     bool addPalmFeature(const PalmFeature &palm);
-    std::vector<PalmFeature> palmFeatures() const;
+    PalmFeatures palmFeatures() const;
 
 private:
     void initializeTables();