package com.mwk.utils;

import org.springframework.util.StringUtils;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;


/**
 * 工具类 - 反射
 */
public class ReflectionUtil {
	/**
	 * 调用Getter方法
	 * 
	 * @param object
	 *            对象
	 * 
	 * @param propertyName
	 *            属性名称
	 */
	public static Object invokeGetterMethod(Object object, String propertyName) {
		String getterMethodName = "get" + StringUtils.capitalize(propertyName);
		try {
			Method getterMethod = object.getClass().getMethod(getterMethodName);
			return getterMethod.invoke(object);
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}

	public static Object invokeGetterMethodNoThrowException(Object object, String propertyName) {
		String getterMethodName = "get" + StringUtils.capitalize(propertyName);
		try {
			Method getterMethod = object.getClass().getMethod(getterMethodName);
			return getterMethod.invoke(object);
		} catch (Exception e) {
			return null;
		}
	}

	/**
	* @Description 调用Getter方法 字段存在等级关系的：如：pool.reform.id
	* @Date 2020年04月29日 15:03:26
	**/
	public static Object invokeGetterMethodForLevelField(Object object, String propertyName) {
		String[] filedNames = propertyName.split("\\.");
		try {
			for (int i = 0; i < filedNames.length - 1; i++) {
				String subField = filedNames[i];
				object = ReflectionUtil.invokeGetterMethod(object, subField);
				if(object == null){
					return null;
				}
			}
			String getterMethodName = "get" + StringUtils.capitalize(filedNames[filedNames.length - 1]);
			Method getterMethod = object.getClass().getMethod(getterMethodName);
			return getterMethod.invoke(object);
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}

	/**
	 * 调用Setter方法
	 * 
	 * @param object
	 *            对象
	 * 
	 * @param propertyName
	 *            属性名称
	 * 
	 * @param propertyValue
	 *            属性值
	 */
	public static void invokeSetterMethod(Object object, String propertyName, Object propertyValue) {
		Class<?> setterMethodClass = propertyValue.getClass();
		invokeSetterMethod(object, propertyName, propertyValue, setterMethodClass);
	}

	/**
	* @Description 调用Setter方法 字段存在等级关系的：如：pool.reform.id
	* @Date 2020年04月29日 15:04:15
	**/
	public static void invokeSetterMethodForLevelField(Object object, String propertyName, Object propertyValue) {
		Object preObject;
		String[] filedNames = propertyName.split("\\.");
		try {
			for (int i = 0; i < filedNames.length - 1; i++) {
				String subField = filedNames[i];
				preObject = object;
				object = ReflectionUtil.invokeGetterMethod(object, subField);
				if(object == null){
					String getterMethodName = "get" + StringUtils.capitalize(subField);
					Method setterMethod = preObject.getClass().getMethod(getterMethodName);
					object = Class.forName(setterMethod.getGenericReturnType().getTypeName()).newInstance();
					ReflectionUtil.invokeSetterMethod(preObject,subField,object);
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		if(propertyValue instanceof ArrayList){
			setFieldValue(object, filedNames[filedNames.length-1], propertyValue);//ArrayList下面方法设置不进去。临时使用这个方法
		}else{
			ReflectionUtil.invokeSetterMethod(object, filedNames[filedNames.length-1], propertyValue);
		}

	}

	/**
	 * 调用Setter方法
	 * 
	 * @param object
	 *            对象
	 * 
	 * @param propertyName
	 *            属性名称
	 * 
	 * @param propertyValue
	 *            属性值
	 * 
	 * @param setterMethodClass
	 *            参数类型
	 */
	public static void invokeSetterMethod(Object object, String propertyName, Object propertyValue, Class<?> setterMethodClass) {
		String setterMethodName = "set" + StringUtils.capitalize(propertyName);
		try {
			Method setterMethod = object.getClass().getMethod(setterMethodName, setterMethodClass);
			setterMethod.invoke(object, propertyValue);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 获取对象属性值,无视private/protected/getter
	 * 
	 * @param object
	 *            对象
	 * 
	 * @param fieldName
	 *            属性名称
	 */
	public static Object getFieldValue(Object object, String fieldName) {
		Field field = getAccessibleField(object, fieldName);
		if (field == null) {
			throw new IllegalArgumentException("Could not find field " + fieldName);
		}
		Object result = null;
		try {
			result = field.get(object);
		} catch (IllegalAccessException e) {
		}
		return result;
	}

	/**
	 * 设置对象属性值,无视private/protected/setter
	 * 
	 * @param object
	 *            对象
	 * 
	 * @param fieldName
	 *            属性名称
	 */
	public static void setFieldValue(Object object, String fieldName, Object value) {
		Field field = getAccessibleField(object, fieldName);
		if (field == null) {
			throw new IllegalArgumentException("Could not find field " + fieldName);
		}
		try {
			field.set(object, value);
		} catch (IllegalAccessException e) {
		}
	}


	private static Field getAccessibleField(final Object object, final String fieldName) {
		for (Class<?> superClass = object.getClass(); superClass != Object.class; superClass = superClass.getSuperclass()) {
			try {
				Field field = superClass.getDeclaredField(fieldName);
				field.setAccessible(true);
				return field;
			} catch (NoSuchFieldException e) {
			}
		}
		return null;
	}
}