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gitea/vendor/xorm.io/xorm/dialects/driver.go
2021-05-14 20:17:06 +01:00

62 lines
1.4 KiB
Go
Vendored

// Copyright 2019 The Xorm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package dialects
import (
"fmt"
)
// Driver represents a database driver
type Driver interface {
Parse(string, string) (*URI, error)
}
var (
drivers = map[string]Driver{}
)
// RegisterDriver register a driver
func RegisterDriver(driverName string, driver Driver) {
if driver == nil {
panic("core: Register driver is nil")
}
if _, dup := drivers[driverName]; dup {
panic("core: Register called twice for driver " + driverName)
}
drivers[driverName] = driver
}
// QueryDriver query a driver with name
func QueryDriver(driverName string) Driver {
return drivers[driverName]
}
// RegisteredDriverSize returned all drivers's length
func RegisteredDriverSize() int {
return len(drivers)
}
// OpenDialect opens a dialect via driver name and connection string
func OpenDialect(driverName, connstr string) (Dialect, error) {
driver := QueryDriver(driverName)
if driver == nil {
return nil, fmt.Errorf("unsupported driver name: %v", driverName)
}
uri, err := driver.Parse(driverName, connstr)
if err != nil {
return nil, err
}
dialect := QueryDialect(uri.DBType)
if dialect == nil {
return nil, fmt.Errorf("unsupported dialect type: %v", uri.DBType)
}
dialect.Init(uri)
return dialect, nil
}