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This article mainly explains "how to write an annotation-based static code enhancer / generator with golang imitation spring ioc/aop". The content of the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to write an annotation-based static code enhancer / generator with golang imitation spring ioc/aop".

SpringSpring implements a lightweight Java Web Service system application framework based on J2EE technology. It has many excellent features, and many companies choose Spring as the basic development architecture of their products or projects. The main features of Spring include: 1. Light weight 2. Control reversal (Inversion of Control, IoC) 3. Facing Container 4. Facing the section (AspectOriented Programming, AOP) 5. Framework flexible source gitee address: https://gitee.com/ioly/learning.gooop original text link: https://my.oschina.net/ioly target

Refer to the common notes in spring and write "Annotation-based static Code Enhancer / Generator" in golang.

Configuration: ComponentScan,Configuration, Bean

Bean statement: Component, Service, Controller

Bean injection: Autowried

AOP comments: Before, After, Around, PointCut

Subgoal (Day 3)

Add ProjectCmd to support project definition

Add auxiliary classes for text scanning: Chars.go, Tokens.go

Define the code generation service interface ICodingService and its supporting interface

Design

Command/ProjectCmd: project definition directive

Common/Chars: character recognition helper class

Common/Tokens: composite text recognition helper class

Service/ICodingService: code generation service interface

Service/iCodingContext: code generation context

Service/iCodingState: service status in status mode

Service/iCmdRunner: define the instruction executor interface to implement the proposed chain of responsibility mode for extension

Service/tInitialState: default service statu

Command/ProjectCmd.go

Project definition directive

Package project_cmdimport ("errors"fmt"learning/gooop/spring/autogen/command"learning/gooop/spring/autogen/common"os"strings") / / ProjectCmd defines a project with name and dirtype ProjectCmd struct {name string dir string} / / ProjectCmdBuilder parses cli input and creates a ProjectCmd instancetype ProjectCmdBuilder intconst gProjectCmdPrefix = "project" var gErrorInvalidProjectCmd = errors.New ("invalid project cmd") Func (me * ProjectCmd) String () string {return fmt.Sprintf ("project s" Me.name, me.dir)} func (me * ProjectCmd) Apply (ctx command.ICmdContext) error {panic ("implements me")} func (me * ProjectCmdBuilder) Build (line string) (error, command.ICmd) {if! common.Tokens.MatchString (line, gProjectCmdPrefix) {return nil, nil} line = strings.TrimSpace (linelen (gProjectCmdPrefix):]) b Name: = common.Tokens.MatchIdentifier (line) if! b {return gErrorInvalidProjectCmd, nil} line = line [len (name):] b, spaces: = common.Tokens.MatchSpaces (line) if! b {return gErrorInvalidProjectCmd, nil} line = line [len (spaces):] b Dir: = common.Tokens.MatchDir (line) if! b {return gErrorInvalidProjectCmd, nil} _, e: = os.Stat (dir) if e! = nil {return e, nil} return nil, & ProjectCmd {name, dir}} common/Chars.go

Character recognition helper class

Package commontype tChars intvar Chars = new (tChars) func (me * tChars) IsSpace (it rune) bool {switch it {case': return true case'\ t': return true case'\ r': return true case'\ n': return true} return false} func ( Me * tChars) Is09 (it rune) bool {return it > ='0' & & it ='1' & & it ='a'& & it ='A' & & it

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