From 6d50a6228bc587ea636da44a81c15fc4d4bfb14d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BC=80=E6=BA=90=E6=B5=B7=E5=93=A5?= <fuhai999@gmail.com>
Date: Sun, 30 Jul 2023 11:22:53 +0800
Subject: [PATCH] feat: ClassUtil.newInstance() add create from factory method
 support

---
 .../main/java/com/mybatisflex/core/util/ClassUtil.java | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/mybatis-flex-core/src/main/java/com/mybatisflex/core/util/ClassUtil.java b/mybatis-flex-core/src/main/java/com/mybatisflex/core/util/ClassUtil.java
index 266d9901..541018a8 100644
--- a/mybatis-flex-core/src/main/java/com/mybatisflex/core/util/ClassUtil.java
+++ b/mybatis-flex-core/src/main/java/com/mybatisflex/core/util/ClassUtil.java
@@ -138,6 +138,16 @@ public class ClassUtil {
                 }
                 return (T) otherConstructor.newInstance(parameters);
             }
+            // 没有任何构造函数的情况下，去查找 static 工厂方法，满足 lombok 注解的需求
+            else {
+                Method factoryMethod = ClassUtil.getFirstMethod(clazz, m -> m.getParameterCount() == 0
+                    && clazz.isAssignableFrom(m.getReturnType())
+                    && Modifier.isPublic(m.getModifiers())
+                    && Modifier.isStatic(m.getModifiers()));
+                if (factoryMethod != null) {
+                    return (T) factoryMethod.invoke(null);
+                }
+            }
             throw new IllegalArgumentException("the class \"" + clazz.getName() + "\" has no constructor.");
         } catch (Exception e) {
             throw new RuntimeException("Can not newInstance class: " + clazz.getName());