Kropotov - go2hw07

codegen/go.mod

@@ -0,0 +1,5 @@
+module hw07/codegen
+
+go 1.16
+
+require github.com/mailru/easyjson v0.7.7 // indirect

codegen/go.sum

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+github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
+github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
+github.com/mailru/easyjson v0.7.7 h1:UGYAvKxe3sBsEDzO8ZeWOSlIQfWFlxbzLZe7hwFURr0=
+github.com/mailru/easyjson v0.7.7/go.mod h1:xzfreul335JAWq5oZzymOObrkdz5UnU4kGfJJLY9Nlc=

codegen/main.go

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+package main
+
+
+func main() {
+
+}

codegen/struct.go

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+package main
+
+//easyjson:json
+
+type Product struct {
+	Id int64
+	Name string
+	Code string
+	Price float64
+	Status   int
+}

codegen/struct_easyjson.go

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+// TEMPORARY AUTOGENERATED FILE: easyjson stub code to make the package
+// compilable during generation.
+
+package  main
+
+import (
+  "github.com/mailru/easyjson/jwriter"
+  "github.com/mailru/easyjson/jlexer"
+)
+
+func ( Product ) MarshalJSON() ([]byte, error) { return nil, nil }
+func (* Product ) UnmarshalJSON([]byte) error { return nil }
+func ( Product ) MarshalEasyJSON(w *jwriter.Writer) {}
+func (* Product ) UnmarshalEasyJSON(l *jlexer.Lexer) {}
+
+type EasyJSON_exporter_Product *Product

ref/go.mod

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+module hw07/ref
+
+go 1.16

ref/main.go

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+package main
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+func sqlConvert(sqlText string, params ...interface{}) (sqlTextResult string, paramsResult []interface{}) {
+
+	paramsResult = []interface{}(nil)
+	sqlTextParts := strings.Split(sqlText, "?")
+	sqlTextResult = sqlTextParts[0]
+	for i, val := range params {
+		rv := reflect.ValueOf(val)
+		if rv.Kind() == reflect.Slice {
+			blank := ""
+			for j := 0; j < rv.Len(); j++ {
+				paramsResult = append(paramsResult, rv.Index(j).Interface())
+				if j < rv.Len() -1 {
+					blank += "?,"
+				} else {
+					blank += "?"
+				}
+			}
+			sqlTextResult = sqlTextResult + blank + sqlTextParts[i+1]
+		} else {
+			paramsResult = append(paramsResult, interface{}(val))
+			sqlTextResult = sqlTextResult + "?" + sqlTextParts[i+1]
+		}
+	}
+	return sqlTextResult, paramsResult
+}
+
+func main() {
+	a, b := sqlConvert("SELECT * FROM table WHERE deleted = ? AND id IN(?) AND count < ?",
+		false, []int{1, 6, 234}, 555 )
+	fmt.Println(a, b)
+	//
+	// SELECT * FROM table WHERE deleted = ? AND id IN(?,?,?) AND count < ? [false 1 6 234 555]
+	//
+}