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@@ -0,0 +1,60 @@
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+package com.baomidou.mybatisplus.core.toolkit.support;
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+
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+import com.baomidou.mybatisplus.core.exceptions.MybatisPlusException;
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+import com.baomidou.mybatisplus.core.toolkit.ReflectionKit;
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+
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+import java.lang.reflect.Field;
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+import java.lang.reflect.InvocationHandler;
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+import java.lang.reflect.Proxy;
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+
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+/**
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+ * Create by hcl at 2021/5/17
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+ */
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+public class ProxyLambdaMeta implements LambdaMeta {
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+ private static final Field FIELD_MEMBER_NAME;
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+ private static final Field FIELD_MEMBER_NAME_CLAZZ;
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+ private static final Field FIELD_MEMBER_NAME_NAME;
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+
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+ static {
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+ try {
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+ Class<?> classDirectMethodHandle = Class.forName("java.lang.invoke.DirectMethodHandle");
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+ FIELD_MEMBER_NAME = ReflectionKit.setAccessible(classDirectMethodHandle.getDeclaredField("member"));
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+ Class<?> classMemberName = Class.forName("java.lang.invoke.MemberName");
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+ FIELD_MEMBER_NAME_CLAZZ = ReflectionKit.setAccessible(classMemberName.getDeclaredField("clazz"));
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+ FIELD_MEMBER_NAME_NAME = ReflectionKit.setAccessible(classMemberName.getDeclaredField("name"));
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+ } catch (ClassNotFoundException | NoSuchFieldException e) {
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+ throw new MybatisPlusException(e);
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+ }
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+ }
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+
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+ private final Class<?> clazz;
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+ private final String name;
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+
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+ public ProxyLambdaMeta(Proxy func) {
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+ InvocationHandler handler = Proxy.getInvocationHandler(func);
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+ try {
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+ Object dmh = ReflectionKit.setAccessible(handler.getClass().getDeclaredField("val$target")).get(handler);
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+ Object member = FIELD_MEMBER_NAME.get(dmh);
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+ clazz = (Class<?>) FIELD_MEMBER_NAME_CLAZZ.get(member);
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+ name = (String) FIELD_MEMBER_NAME_NAME.get(member);
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+ } catch (IllegalAccessException | NoSuchFieldException e) {
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+ throw new MybatisPlusException(e);
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+ }
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+ }
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+
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+ @Override
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+ public String getImplMethodName() {
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+ return name;
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+ }
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+
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+ @Override
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+ public Class<?> getInstantiatedClass() {
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+ return clazz;
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+ }
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+
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+ @Override
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+ public String toString() {
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+ return clazz.getSimpleName() + "::" + name;
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+ }
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+
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+}
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