feature(工厂方法）：工厂方法

.inscode

-run = "javac Main.java && java Main"
-language = "java"
-
-[debugger]
-program = "Main"

Main.java

-class Main {
-  public static void main(String[] args) {
-    System.out.println("Hello world!");
-  }
-}
\ No newline at end of file

inscode.nix

-{ pkgs }: {
-    deps = [
-        pkgs.graalvm17-ce
-        pkgs.maven
-    ];
-}
\ No newline at end of file

java/com/kongxiang/raindrop/dp/type/create/factory/factorymethod/AProduct.java

+package com.kongxiang.raindrop.dp.type.create.factory.factorymethod;
+
+public class AProduct implements IProduct{
+    @Override
+    public String getName() {
+        return "A";
+    }
+}

java/com/kongxiang/raindrop/dp/type/create/factory/factorymethod/BProduct.java

+package com.kongxiang.raindrop.dp.type.create.factory.factorymethod;
+
+public class BProduct implements IProduct{
+    @Override
+    public String getName() {
+        return "B";
+    }
+}

java/com/kongxiang/raindrop/dp/type/create/factory/factorymethod/IFactory.java

+package com.kongxiang.raindrop.dp.type.create.factory.factorymethod;
+
+/**
+ * 工厂类接口
+ */
+public interface IFactory {
+
+    /**
+     * 期望获取的 产品类，工厂生产对应的类
+     * @param product 产品类
+     * @return
+     */
+    IProduct get(Class<? extends IProduct> product) throws InstantiationException, IllegalAccessException;
+}

java/com/kongxiang/raindrop/dp/type/create/factory/factorymethod/IProduct.java

+package com.kongxiang.raindrop.dp.type.create.factory.factorymethod;
+
+/**
+ * 产品类
+ */
+public interface IProduct {
+    /**
+     * 获取产品名称
+     * @return
+     */
+    String getName();
+}

java/com/kongxiang/raindrop/dp/type/create/factory/factorymethod/ProductFactory.java

+package com.kongxiang.raindrop.dp.type.create.factory.factorymethod;
+
+public class ProductFactory implements IFactory{
+    @Override
+    public IProduct get(Class<? extends IProduct> wants) throws InstantiationException, IllegalAccessException {
+        if (wants!= null){
+            // 空参构造器
+            return wants.newInstance();
+        }
+        return null;
+    }
+}

java/com/kongxiang/raindrop/dp/type/create/factory/simplefactory/SimpleFactory.java

+package com.kongxiang.raindrop.dp.type.create.factory.simplefactory;
+
+import com.kongxiang.raindrop.dp.type.create.factory.factorymethod.IProduct;
+
+/**
+ * 简单工厂模式：
+ * 1. 使用条件： 只需要有一个 工厂，但我们不需要去New出来，通过static就可以使用工厂方法
+ *
+ */
+public class SimpleFactory {
+    public static IProduct getProduct(Class<? extends IProduct> wants) throws InstantiationException, IllegalAccessException {
+        if (wants!= null){
+            // 空参构造器
+            return wants.newInstance();
+        }
+        return null;
+    }
+}

java/com/kongxiang/raindrop/dp/type/create/factory/工厂模式.puml

+@startuml
+'https://plantuml.com/class-diagram
+
+title: 工厂方法通用实现
+
+
+
+interface CreateFactory as "工厂类" {
+    factoryMethod():IProduct;
+}
+interface IProduct as "工厂产品"
+
+class Creator as "工厂实现"
+CreateFactory <|-- Creator
+Creator .> IProduct
+
+ class A
+IProduct <|-- A
+class B
+IProduct <|-- B
+
+
+@enduml
\ No newline at end of file

java/com/kongxiang/raindrop/dp/type/create/singleton/单例类图.puml

+@startuml
+'https://plantuml.com/class-diagram
+
+ class Singleton as "单例类" {
+     .. 私有构造器..
+     - construct()
+     .. static 实例 ..
+     - {static} INSTANCE : Singleton
+     .. 静态单例方法 ..
+     + {static} getInstance():Singleton
+ }
+ Singleton "1" -> "1" Singleton
+
+@enduml
\ No newline at end of file

main.iml

-<?xml version="1.0" encoding="UTF-8"?>
-<module type="JAVA_MODULE" version="4">
-  <component name="NewModuleRootManager" inherit-compiler-output="true">
-    <exclude-output />
-    <content url="file://$MODULE_DIR$">
-      <sourceFolder url="file://$MODULE_DIR$/java" isTestSource="false" />
-    </content>
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-  <component name="SonarLintModuleSettings">
-    <option name="uniqueId" value="88e1d104-c961-43ef-925c-2ef60297718b" />
-  </component>
-</module>
\ No newline at end of file

myartifactid.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module version="4">
+  <component name="SonarLintModuleSettings">
+    <option name="uniqueId" value="963d936e-8979-414a-98ac-724c2c4fc949" />
+  </component>
+</module>
\ No newline at end of file

pom.xml

-<project>
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>mygroupid</groupId>
-  <artifactId>myartifactid</artifactId>
-  <version>0.0-SNAPSHOT</version>
-  <dependencies>
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <version>4.12</version>
-      <type>jar</type>
-    </dependency>
-    <dependency>
-      <groupId>com.googlecode.json-simple</groupId>
-      <artifactId>json-simple</artifactId>
-      <version>1.1.1</version>
-      <type>jar</type>
-    </dependency>
-    <dependency>
-      <groupId>org.hamcrest</groupId>
-      <artifactId>hamcrest-core</artifactId>
-      <version>1.3</version>
-      <type>jar</type>
-    </dependency>
-  </dependencies>
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>de.qaware.maven</groupId>
-        <artifactId>go-offline-maven-plugin</artifactId>
-        <version>1.2.5</version>
-        <configuration>
-          <dynamicDependencies>
-            <DynamicDependency>
-              <groupId>org.apache.maven.surefire</groupId>
-              <artifactId>surefire-junit4</artifactId>
-              <version>2.20.1</version>
-              <classifier></classifier>
-              <repositoryType>PLUGIN</repositoryType>
-            </DynamicDependency>
-            <DynamicDependency>
-              <groupId>com.querydsl</groupId>
-              <artifactId>querydsl-apt</artifactId>
-              <version>4.2.1</version>
-              <classifier>jpa</classifier>
-              <repositoryType>MAIN</repositoryType>
-            </DynamicDependency>
-          </dynamicDependencies>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
-</project>
\ No newline at end of file