com.livk.commons.util.ClassUtils Maven / Gradle / Ivy

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/*
 * Copyright 2021-2024 spring-boot-extension the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.livk.commons.util;

import lombok.experimental.UtilityClass;

import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;

/**
 * 
 * class相关工具类
 * 
 *
 * @author livk
 */
@UtilityClass
public class ClassUtils extends org.springframework.util.ClassUtils {

	/**
	 * 将Type安全的转成Class
	 * @param  type parameter
	 * @param type type
	 * @return class
	 */
	@SuppressWarnings("unchecked")
	public  Class toClass(Type type) {
		if (type instanceof ParameterizedType parameterizedType) {
			return toClass(parameterizedType.getRawType());
		}
		else if (type instanceof TypeVariable typeVariable) {
			String className = typeVariable.getGenericDeclaration().toString();
			return toClass(resolveClassName(className));
		}
		else {
			return (Class) type;
		}
	}

	/**
	 * 将class全类名转成class
	 * @param className class name
	 * @return class
	 */
	public static Class resolveClassName(String className) {
		return resolveClassName(className, getDefaultClassLoader());
	}

	/**
	 * 判定当前类是否被加载
	 * @param className class name
	 * @return boolean
	 */
	public static boolean isPresent(String className) {
		return isPresent(className, getDefaultClassLoader());
	}

}