简介

使用Clojure封装了Graphviz的使用，目前主要实现了UML的绘制

使用

以命令模式的UML为例，演示cdraw的使用

安装Graphviz

cdraw是对Graphviz的简单封装，请先安装Graphviz

添加依赖

• 使用leiningen新建一个Clojure项目uml

• 在project.clj中添加如下依赖

[com.ivaneye/cdraw "0.2.0"]

定义类

• 在uml.core中编写如下代码

(ns uml.core  (:require [cdraw.uml :refer :all]))
 (defclass Client)
 (defclass Inboker)
 (defclass Receiver {:m ["Action()"]})
 (defclass Command {:m ["Execute()"]})
 (defclass ConcreteCommand {:f  ["state"] :m ["Execute()"]})

• 第一，二行，引入了cdraw

• defclass定义了类，及其字段(:f)和方法(:m),效果图如下:

添加依赖

• 继续在uml.core中添加依赖代码

(defrelation Client :u Receiver)
 (defrelation ConcreteCommand :u Receiver {:t "reveiver"}) 
(defrelation Client :d ConcreteCommand)
(defrelation ConcreteCommand :e Command)
(defrelation Invoker :p Command)

• Client关联Receiver

• ConcreteCommand关联Receiver

• Client依赖ConcreteCommand

• ConcreteCommand继承Command

• Invoker聚合Command

关联  :u 依赖 :d聚合 :p组合 :c继承 :e实现 :i

添加label

• 在uml.core中添加如下代码

(label ConcreteCommand "receive-\\>Action()")

• 需要转义

定义子包

(defsub "Sub Command" Command ConcreteCommand)

• 第一个参数为子包名称

• 后续为需要包含到子包中的类

生成

• 在uml.core中添加如下代码

(watch (to-file "/t.dot") "/t.png")

• to-file生成符合Graphviz的dot文件

• watch生成需要的最终文件，这里是生成了png图片

最终代码

(ns uml.core  (:require [cdraw.uml :refer :all]))

(defclass Client)
(defclass Invoker)
(defclass Receiver {:m ["Action()"]})
(defclass Command {:m ["Execute()"]})
(defclass ConcreteCommand {:f  ["state"] :m ["Execute()"]})

(defrelation Client :u Receiver)
(defrelation ConcreteCommand :u Receiver {:t "reveiver"})(defrelation Client :d ConcreteCommand)
(defrelation ConcreteCommand :e Command)
(defrelation Invoker :p Command)

(label ConcreteCommand "receive-\\>Action()")

(defsub "Sub Command" Command ConcreteCommand)

(watch (to-file "/t.dot") "/t.png")

• cdraw项目地址:https://github.com/ivanpig/cdraw