cloud.tianai.rpc.common.util.ClassUtils Maven / Gradle / Ivy

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package cloud.tianai.rpc.common.util;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;

public class ClassUtils {

    public static  T createObject(Class clazz, Object... args) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException {
        if(clazz.isInterface()) {
            throw new InstantiationException("该class是个接口，不可实例化");
        }
        Class[] types = getType(args);
        Constructor constructor = clazz.getConstructor(types);
        T res = constructor.newInstance(args);
        return res;
    }

    public static Class[] getType(Object[] params) {
        if(params == null || params.length < 1) {
            return new Class[0];
        }
        Class[] classArr = new Class[params.length];
        for (int i = 0; i < params.length; i++) {
            Class clazz = params[i].getClass();
            classArr[i] = clazz;
        }

        return classArr;
    }

    public static Class forName(String classStr, ClassLoader classLoader) throws ClassNotFoundException {
        Class clazz = classLoader.loadClass(classStr);
        return clazz;
    }

    public static Class forName(String classStr) throws ClassNotFoundException {
        return forName(classStr, Thread.currentThread().getContextClassLoader());
    }

}