✨ mica-core 解决 bean copy java17 反射报错

lets-mica · Feb 13, 2025 · 4c2250e · 4c2250e
1 parent 4114a74
commit 4c2250e
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Showing 2 changed files with 42 additions and 36 deletions.
diff --git a/mica-core/src/main/java/net/dreamlu/mica/core/beans/MicaBeanCopier.java b/mica-core/src/main/java/net/dreamlu/mica/core/beans/MicaBeanCopier.java
@@ -29,6 +29,7 @@
 import org.springframework.util.ClassUtils;
 
 import java.beans.PropertyDescriptor;
+import java.lang.invoke.MethodHandles;
 import java.lang.reflect.Method;
 import java.security.ProtectionDomain;
 import java.util.HashMap;
@@ -47,15 +48,15 @@
  * @author L.cm
  */
 public abstract class MicaBeanCopier {
+	private static final String BEAN_NAME_PREFIX = MicaBeanCopier.class.getName();
 	private static final Type CONVERTER = TypeUtils.parseType(Converter.class.getName());
-	private static final Type BEAN_COPIER = TypeUtils.parseType(MicaBeanCopier.class.getName());
+	private static final Type BEAN_COPIER = TypeUtils.parseType(BEAN_NAME_PREFIX);
 	private static final Type BEAN_MAP = TypeUtils.parseType(Map.class.getName());
 	private static final Signature COPY = new Signature("copy", Type.VOID_TYPE, new Type[]{Constants.TYPE_OBJECT, Constants.TYPE_OBJECT, CONVERTER});
 	private static final Signature CONVERT = TypeUtils.parseSignature("Object convert(Object, Class, Object)");
 	private static final Signature BEAN_MAP_GET = TypeUtils.parseSignature("Object get(Object)");
 	private static final Type CLASS_UTILS = TypeUtils.parseType(ClassUtils.class.getName());
 	private static final Signature IS_ASSIGNABLE_VALUE = TypeUtils.parseSignature("boolean isAssignableValue(Class, Object)");
-	private static final String BEAN_NAME_PREFIX = MicaBeanCopier.class.getName();
 	/**
 	 * The map to store {@link MicaBeanCopier} of source type and class type for copy.
 	 */
@@ -69,15 +70,11 @@ public static MicaBeanCopier create(Class source, Class target, boolean useConve
 		MicaBeanCopierKey copierKey = new MicaBeanCopierKey(source, target, useConverter, nonNull);
 		// 利用 ConcurrentMap 缓存 提高性能，接近 直接 get set
 		return CollectionUtil.computeIfAbsent(BEAN_COPIER_MAP, copierKey, key -> {
-			Generator gen = new Generator();
-			gen.setSource(key.source());
-			gen.setTarget(key.target());
+			Generator gen = new Generator(key);
 			gen.setContextClass(MicaBeanCopier.class);
-			gen.setUseConverter(key.useConverter());
-			gen.setNonNull(key.nonNull());
 			gen.setNamePrefix(BEAN_NAME_PREFIX);
 			gen.setUseCache(true);
-			return gen.create(key);
+			return gen.create();
 		});
 	}
 
@@ -91,37 +88,28 @@ public static MicaBeanCopier create(Class source, Class target, boolean useConve
 	public abstract void copy(Object from, Object to, @Nullable Converter converter);
 
 	public static class Generator extends AbstractClassGenerator {
-		private static final Source SOURCE = new Source(MicaBeanCopier.class.getName());
-		private Class source;
-		private Class target;
-		private boolean useConverter;
-		private boolean nonNull;
-
-		Generator() {
+		private static final Source SOURCE = new Source(BEAN_NAME_PREFIX);
+		private final MicaBeanCopierKey copierKey;
+		private final Class source;
+		private final Class target;
+		private final boolean useConverter;
+		private final boolean nonNull;
+		private String className;
+
+		Generator(MicaBeanCopierKey copierKey) {
 			super(SOURCE);
-		}
-
-		public void setSource(Class source) {
-			this.source = source;
-		}
-
-		public void setTarget(Class target) {
-			this.target = target;
+			this.copierKey = copierKey;
+			this.source = copierKey.source();
+			this.target = copierKey.target();
+			this.useConverter = copierKey.useConverter();
+			this.nonNull = copierKey.nonNull();
 		}
 
 		@Override
 		public void setNamePrefix(String namePrefix) {
 			super.setNamePrefix(namePrefix);
 		}
 
-		public void setUseConverter(boolean useConverter) {
-			this.useConverter = useConverter;
-		}
-
-		public void setNonNull(boolean nonNull) {
-			this.nonNull = nonNull;
-		}
-
 		@Override
 		protected ClassLoader getDefaultClassLoader() {
 			// L.cm 保证 和 返回使用同一个 ClassLoader
@@ -133,9 +121,8 @@ protected ProtectionDomain getProtectionDomain() {
 			return ReflectUtils.getProtectionDomain(source);
 		}
 
-		@Override
-		public MicaBeanCopier create(Object key) {
-			return (MicaBeanCopier) super.create(key);
+		public MicaBeanCopier create() {
+			return (MicaBeanCopier) super.create(copierKey);
 		}
 
 		@Override
@@ -145,7 +132,7 @@ public void generateClass(ClassVisitor v) {
 			ClassEmitter ce = new ClassEmitter(v);
 			ce.begin_class(Opcodes.V1_2,
 				Opcodes.ACC_PUBLIC,
-				getClassName(),
+				this.className,
 				BEAN_COPIER,
 				null,
 				Constants.SOURCE_FILE);
@@ -302,6 +289,25 @@ protected Object nextInstance(Object instance) {
 			return instance;
 		}
 
+		@Override
+		protected Class generate(ClassLoaderData data) {
+			// 生成类名
+			this.className = generateClassName(data);
+			try {
+				return MethodHandles.lookup()
+					.defineClass(DefaultGeneratorStrategy.INSTANCE.generate(this))
+					.asSubclass(MicaBeanCopier.class);
+			}  catch (Exception ex) {
+				throw new CodeGenerationException(ex);
+			}
+		}
+
+		private String generateClassName(ClassLoaderData data) {
+			String name = DefaultNamingPolicy.INSTANCE.getClassName(BEAN_NAME_PREFIX, BEAN_NAME_PREFIX, copierKey, data.getUniqueNamePredicate());
+			data.reserveName(name);
+			return name;
+		}
+
 		/**
 		 * 处理 map 的 copy
 		 * @param ce ClassEmitter

diff --git a/mica-core/src/main/java/net/dreamlu/mica/core/beans/MicaBeanMap.java b/mica-core/src/main/java/net/dreamlu/mica/core/beans/MicaBeanMap.java
@@ -55,7 +55,7 @@ public static MicaBeanMap create(Object bean) {
 	public abstract MicaBeanMap newInstance(Object o);
 
 	public static class MicaGenerator extends AbstractClassGenerator {
-		private static final Source SOURCE = new Source(MicaBeanMap.class.getName());
+		private static final Source SOURCE = new Source(BEAN_NAME_PREFIX);
 
 		private Object bean;
 		private Class beanClass;