Simple and Powerful ORM for Go, support mysql,postgres,tidb,sqlite3,mssql,oracle https://xorm.io
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// Copyright 2015 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 xorm
// BeforeInsertProcessor executed before an object is initially persisted to the database
type BeforeInsertProcessor interface {
BeforeInsert()
}
// BeforeUpdateProcessor executed before an object is updated
type BeforeUpdateProcessor interface {
BeforeUpdate()
}
// BeforeDeleteProcessor executed before an object is deleted
type BeforeDeleteProcessor interface {
BeforeDelete()
}
// BeforeSetProcessor executed before data set to the struct fields
type BeforeSetProcessor interface {
BeforeSet(string, Cell)
}
// AfterSetProcessor executed after data set to the struct fields
type AfterSetProcessor interface {
AfterSet(string, Cell)
}
// AfterInsertProcessor executed after an object is persisted to the database
type AfterInsertProcessor interface {
AfterInsert()
}
// AfterUpdateProcessor executed after an object has been updated
type AfterUpdateProcessor interface {
AfterUpdate()
}
// AfterDeleteProcessor executed after an object has been deleted
type AfterDeleteProcessor interface {
AfterDelete()
}
// AfterLoadProcessor executed after an ojbect has been loaded from database
type AfterLoadProcessor interface {
AfterLoad()
}
// AfterLoadSessionProcessor executed after an ojbect has been loaded from database with session parameter
type AfterLoadSessionProcessor interface {
AfterLoad(*Session)
}
type executedProcessorFunc func(*Session, interface{}) error
type executedProcessor struct {
fun executedProcessorFunc
session *Session
bean interface{}
}
func (executor *executedProcessor) execute() error {
return executor.fun(executor.session, executor.bean)
}
func (session *Session) executeProcessors() error {
processors := session.afterProcessors
session.afterProcessors = make([]executedProcessor, 0)
for _, processor := range processors {
if err := processor.execute(); err != nil {
return err
}
}
return nil
}
func cleanupProcessorsClosures(slices *[]func(interface{})) {
if len(*slices) > 0 {
*slices = make([]func(interface{}), 0)
}
}
func executeBeforeClosures(session *Session, bean interface{}) {
// handle before delete processors
for _, closure := range session.beforeClosures {
closure(bean)
}
cleanupProcessorsClosures(&session.beforeClosures)
}
func executeBeforeSet(bean interface{}, fields []string, scanResults []interface{}) {
if b, hasBeforeSet := bean.(BeforeSetProcessor); hasBeforeSet {
for ii, key := range fields {
b.BeforeSet(key, Cell(scanResults[ii].(*interface{})))
}
}
}
func executeAfterSet(bean interface{}, fields []string, scanResults []interface{}) {
if b, hasAfterSet := bean.(AfterSetProcessor); hasAfterSet {
for ii, key := range fields {
b.AfterSet(key, Cell(scanResults[ii].(*interface{})))
}
}
}
func buildAfterProcessors(session *Session, bean interface{}) {
// handle afterClosures
for _, closure := range session.afterClosures {
session.afterProcessors = append(session.afterProcessors, executedProcessor{
fun: func(sess *Session, bean interface{}) error {
closure(bean)
return nil
},
session: session,
bean: bean,
})
}
if a, has := bean.(AfterLoadProcessor); has {
session.afterProcessors = append(session.afterProcessors, executedProcessor{
fun: func(sess *Session, bean interface{}) error {
a.AfterLoad()
return nil
},
session: session,
bean: bean,
})
}
if a, has := bean.(AfterLoadSessionProcessor); has {
session.afterProcessors = append(session.afterProcessors, executedProcessor{
fun: func(sess *Session, bean interface{}) error {
a.AfterLoad(sess)
return nil
},
session: session,
bean: bean,
})
}
}