add object creator

hutool-core/src/main/java/org/dromara/hutool/core/reflect/ConstructorUtil.java

@@ -12,17 +12,13 @@
 
 package org.dromara.hutool.core.reflect;
 
-import org.dromara.hutool.core.classloader.ClassLoaderUtil;
 import org.dromara.hutool.core.exception.HutoolException;
 import org.dromara.hutool.core.lang.Assert;
 import org.dromara.hutool.core.map.WeakConcurrentMap;
-import org.dromara.hutool.core.reflect.lookup.LookupUtil;
+import org.dromara.hutool.core.reflect.creator.DefaultObjectCreator;
-import org.dromara.hutool.core.reflect.method.MethodHandleUtil;
+import org.dromara.hutool.core.reflect.creator.PossibleObjectCreator;
 
-import java.lang.invoke.MethodHandle;
-import java.lang.reflect.Array;
 import java.lang.reflect.Constructor;
-import java.util.*;
 
 /**
  * 反射中{@link Constructor}构造工具类，包括获取构造类和通过构造实例化对象相关工具
@@ -99,8 +95,9 @@ public class ConstructorUtil {
 	 * @return 对象
 	 * @throws HutoolException 包装各类异常
 	 */
+	@SuppressWarnings("unchecked")
 	public static <T> T newInstance(final String clazz) throws HutoolException {
-		return newInstance(ClassLoaderUtil.loadClass(clazz));
+		return (T) DefaultObjectCreator.of(clazz).create();
 	}
 
 	/**
@@ -113,9 +110,7 @@ public class ConstructorUtil {
 	 * @throws HutoolException 包装各类异常
 	 */
 	public static <T> T newInstance(final Class<T> clazz, final Object... params) throws HutoolException {
-		final Class<?>[] paramTypes = ClassUtil.getClasses(params);
+		return DefaultObjectCreator.of(clazz, params).create();
-		final MethodHandle constructor = LookupUtil.findConstructor(clazz, paramTypes);
-		return MethodHandleUtil.invokeHandle(constructor, params);
 	}
 
 	/**
@@ -133,55 +128,7 @@ public class ConstructorUtil {
 	 * @param type 被构造的类
 	 * @return 构造后的对象，构造失败返回{@code null}
 	 */
-	@SuppressWarnings("unchecked")
+	public static <T> T newInstanceIfPossible(final Class<T> type) {
-	public static <T> T newInstanceIfPossible(Class<T> type) {
+		return PossibleObjectCreator.of(type).create();
-		Assert.notNull(type);
-
-		// 原始类型
-		if (type.isPrimitive()) {
-			return (T) ClassUtil.getPrimitiveDefaultValue(type);
-		}
-
-		// 某些特殊接口的实例化按照默认实现进行
-		if (type.isAssignableFrom(AbstractMap.class)) {
-			type = (Class<T>) HashMap.class;
-		} else if (type.isAssignableFrom(List.class)) {
-			type = (Class<T>) ArrayList.class;
-		} else if (type.isAssignableFrom(Set.class)) {
-			type = (Class<T>) HashSet.class;
-		}
-
-		try {
-			return newInstance(type);
-		} catch (final Exception e) {
-			// ignore
-			// 默认构造不存在的情况下查找其它构造
-		}
-
-		// 枚举
-		if (type.isEnum()) {
-			return type.getEnumConstants()[0];
-		}
-
-		// 数组
-		if (type.isArray()) {
-			return (T) Array.newInstance(type.getComponentType(), 0);
-		}
-
-		final Constructor<T>[] constructors = getConstructors(type);
-		Class<?>[] parameterTypes;
-		for (final Constructor<T> constructor : constructors) {
-			parameterTypes = constructor.getParameterTypes();
-			if (0 == parameterTypes.length) {
-				continue;
-			}
-			ReflectUtil.setAccessible(constructor);
-			try {
-				return constructor.newInstance(ClassUtil.getDefaultValues(parameterTypes));
-			} catch (final Exception ignore) {
-				// 构造出错时继续尝试下一种构造方式
-			}
-		}
-		return null;
 	}
 }

hutool-core/src/main/java/org/dromara/hutool/core/reflect/creator/DefaultObjectCreator.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2023. looly(loolly@aliyun.com)
+ * Hutool is licensed under Mulan PSL v2.
+ * You can use this software according to the terms and conditions of the Mulan PSL v2.
+ * You may obtain a copy of Mulan PSL v2 at:
+ *          https://license.coscl.org.cn/MulanPSL2
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PSL v2 for more details.
+ */
+
+package org.dromara.hutool.core.reflect.creator;
+
+import org.dromara.hutool.core.classloader.ClassLoaderUtil;
+import org.dromara.hutool.core.lang.Assert;
+import org.dromara.hutool.core.reflect.ClassUtil;
+import org.dromara.hutool.core.reflect.lookup.LookupUtil;
+import org.dromara.hutool.core.reflect.method.MethodHandleUtil;
+
+import java.lang.invoke.MethodHandle;
+
+/**
+ * 默认对象实例化器<br>
+ * 通过传入对象类型和构造函数的参数，调用对应的构造方法创建对象。
+ *
+ * @param <T> 对象类型
+ */
+public class DefaultObjectCreator<T> implements ObjectCreator<T> {
+
+	/**
+	 * 创建默认的对象实例化器
+	 *
+	 * @param fullClassName  类名全程
+	 * @param <T>    对象类型
+	 * @return DefaultObjectCreator
+	 */
+	public static <T> DefaultObjectCreator<T> of(final String fullClassName) {
+		return of(ClassLoaderUtil.loadClass(fullClassName));
+	}
+
+	/**
+	 * 创建默认的对象实例化器
+	 *
+	 * @param clazz  实例化的类
+	 * @param params 构造参数，无参数空
+	 * @param <T>    对象类型
+	 * @return DefaultObjectCreator
+	 */
+	public static <T> DefaultObjectCreator<T> of(final Class<T> clazz, final Object... params) {
+		return new DefaultObjectCreator<>(clazz, params);
+	}
+
+	final MethodHandle constructor;
+	final Object[] params;
+
+	/**
+	 * 构造
+	 *
+	 * @param clazz  实例化的类
+	 * @param params 构造参数，无参数空
+	 */
+	public DefaultObjectCreator(final Class<T> clazz, final Object... params) {
+		final Class<?>[] paramTypes = ClassUtil.getClasses(params);
+		this.constructor = LookupUtil.findConstructor(clazz, paramTypes);
+		Assert.notNull(this.constructor, "Constructor not found!");
+		this.params = params;
+	}
+
+	@Override
+	public T create() {
+		return MethodHandleUtil.invokeHandle(constructor, params);
+	}
+}

hutool-core/src/main/java/org/dromara/hutool/core/reflect/creator/ObjectCreator.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2023. looly(loolly@aliyun.com)
+ * Hutool is licensed under Mulan PSL v2.
+ * You can use this software according to the terms and conditions of the Mulan PSL v2.
+ * You may obtain a copy of Mulan PSL v2 at:
+ *          https://license.coscl.org.cn/MulanPSL2
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PSL v2 for more details.
+ */
+
+package org.dromara.hutool.core.reflect.creator;
+
+/**
+ * 对象创建器，用于自定义创建指定类型、指定参数的对象<br>
+ * 也叫对象初始化器。
+ *
+ * @param <T> 对象类型
+ * @since 6.0.0
+ */
+public interface ObjectCreator<T> {
+	/**
+	 * 创建对象
+	 *
+	 * @return 对象
+	 */
+	T create();
+}

hutool-core/src/main/java/org/dromara/hutool/core/reflect/creator/PossibleObjectCreator.java

@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2023. looly(loolly@aliyun.com)
+ * Hutool is licensed under Mulan PSL v2.
+ * You can use this software according to the terms and conditions of the Mulan PSL v2.
+ * You may obtain a copy of Mulan PSL v2 at:
+ *          https://license.coscl.org.cn/MulanPSL2
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PSL v2 for more details.
+ */
+
+package org.dromara.hutool.core.reflect.creator;
+
+import org.dromara.hutool.core.lang.Assert;
+import org.dromara.hutool.core.reflect.ClassUtil;
+import org.dromara.hutool.core.reflect.ConstructorUtil;
+import org.dromara.hutool.core.reflect.ReflectUtil;
+
+import java.lang.reflect.Array;
+import java.lang.reflect.Constructor;
+import java.util.*;
+
+/**
+ * 尝试方式对象实例化器<br>
+ * 通过判断类型或调用可能的构造，构建对象，支持：
+ * <ul>
+ *     <li>原始类型</li>
+ *     <li>接口或抽象类型</li>
+ *     <li>枚举</li>
+ *     <li>数组</li>
+ *     <li>使用默认参数的构造方法</li>
+ * </ul>
+ * <p>
+ * 对于接口或抽象类型，构造其默认实现：
+ * <pre>
+ *     Map       -》 HashMap
+ *     Collction -》 ArrayList
+ *     List      -》 ArrayList
+ *     Set       -》 HashSet
+ * </pre>
+ *
+ * @param <T> 对象类型
+ */
+public class PossibleObjectCreator<T> implements ObjectCreator<T> {
+
+	/**
+	 * 创建默认的对象实例化器
+	 *
+	 * @param clazz 实例化的类
+	 * @param <T>   对象类型
+	 * @return DefaultObjectCreator
+	 */
+	public static <T> PossibleObjectCreator<T> of(final Class<T> clazz) {
+		return new PossibleObjectCreator<>(clazz);
+	}
+
+	final Class<T> clazz;
+
+	/**
+	 * 构造
+	 *
+	 * @param clazz 实例化的类
+	 */
+	public PossibleObjectCreator(final Class<T> clazz) {
+		this.clazz = Assert.notNull(clazz);
+	}
+
+	@Override
+	@SuppressWarnings("unchecked")
+	public T create() {
+		Class<T> type = this.clazz;
+
+		// 原始类型
+		if (type.isPrimitive()) {
+			return (T) ClassUtil.getPrimitiveDefaultValue(type);
+		}
+
+		// 某些特殊接口的实例化按照默认实现进行
+		if (type.isAssignableFrom(AbstractMap.class)) {
+			type = (Class<T>) HashMap.class;
+		} else if (type.isAssignableFrom(List.class)) {
+			type = (Class<T>) ArrayList.class;
+		} else if (type.isAssignableFrom(Set.class)) {
+			type = (Class<T>) HashSet.class;
+		}
+
+		try {
+			return DefaultObjectCreator.of(type).create();
+		} catch (final Exception e) {
+			// ignore
+			// 默认构造不存在的情况下查找其它构造
+		}
+
+		// 枚举
+		if (type.isEnum()) {
+			return type.getEnumConstants()[0];
+		}
+
+		// 数组
+		if (type.isArray()) {
+			return (T) Array.newInstance(type.getComponentType(), 0);
+		}
+
+		final Constructor<T>[] constructors = ConstructorUtil.getConstructors(type);
+		Class<?>[] parameterTypes;
+		for (final Constructor<T> constructor : constructors) {
+			parameterTypes = constructor.getParameterTypes();
+			if (0 == parameterTypes.length) {
+				continue;
+			}
+			ReflectUtil.setAccessible(constructor);
+			try {
+				return constructor.newInstance(ClassUtil.getDefaultValues(parameterTypes));
+			} catch (final Exception ignore) {
+				// 构造出错时继续尝试下一种构造方式
+			}
+		}
+		return null;
+	}
+}

hutool-core/src/main/java/org/dromara/hutool/core/reflect/creator/package-info.java

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2023. looly(loolly@aliyun.com)
+ * Hutool is licensed under Mulan PSL v2.
+ * You can use this software according to the terms and conditions of the Mulan PSL v2.
+ * You may obtain a copy of Mulan PSL v2 at:
+ *          https://license.coscl.org.cn/MulanPSL2
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PSL v2 for more details.
+ */
+
+/**
+ * 对象实例化器，对象创建器
+ *
+ * @author looly
+ * @since 6.0.0
+ */
+package org.dromara.hutool.core.reflect.creator;