/*
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* Copyright (c) 2018-2028, DreamLu All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* Neither the name of the dreamlu.net developer nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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* Author: DreamLu 卢春梦 (596392912@qq.com)
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*/
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package org.springblade.core.tool.utils;
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import org.springframework.beans.BeansException;
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import org.springframework.cglib.core.CodeGenerationException;
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import org.springframework.core.convert.Property;
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import org.springframework.core.convert.TypeDescriptor;
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import org.springframework.lang.Nullable;
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import org.springframework.util.ReflectionUtils;
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import java.beans.PropertyDescriptor;
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import java.lang.annotation.Annotation;
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import java.lang.reflect.Field;
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import java.lang.reflect.Method;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* 反射工具类
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*
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* @author L.cm
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*/
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public class ReflectUtil extends ReflectionUtils {
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/**
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* 获取 Bean 的所有 get方法
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*
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* @param type 类
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* @return PropertyDescriptor数组
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*/
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public static PropertyDescriptor[] getBeanGetters(Class type) {
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return getPropertiesHelper(type, true, false);
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}
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/**
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* 获取 Bean 的所有 set方法
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*
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* @param type 类
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* @return PropertyDescriptor数组
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*/
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public static PropertyDescriptor[] getBeanSetters(Class type) {
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return getPropertiesHelper(type, false, true);
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}
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/**
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* 获取 Bean 的所有 PropertyDescriptor
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*
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* @param type 类
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* @param read 读取方法
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* @param write 写方法
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* @return PropertyDescriptor数组
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*/
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public static PropertyDescriptor[] getPropertiesHelper(Class type, boolean read, boolean write) {
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try {
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PropertyDescriptor[] all = BeanUtil.getPropertyDescriptors(type);
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if (read && write) {
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return all;
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} else {
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List<PropertyDescriptor> properties = new ArrayList<>(all.length);
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for (PropertyDescriptor pd : all) {
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if (read && pd.getReadMethod() != null) {
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properties.add(pd);
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} else if (write && pd.getWriteMethod() != null) {
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properties.add(pd);
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}
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}
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return properties.toArray(new PropertyDescriptor[0]);
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}
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} catch (BeansException ex) {
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throw new CodeGenerationException(ex);
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}
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}
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/**
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* 获取 bean 的属性信息
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* @param propertyType 类型
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* @param propertyName 属性名
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* @return {Property}
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*/
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@Nullable
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public static Property getProperty(Class<?> propertyType, String propertyName) {
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PropertyDescriptor propertyDescriptor = BeanUtil.getPropertyDescriptor(propertyType, propertyName);
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if (propertyDescriptor == null) {
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return null;
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}
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return ReflectUtil.getProperty(propertyType, propertyDescriptor, propertyName);
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}
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/**
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* 获取 bean 的属性信息
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* @param propertyType 类型
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* @param propertyDescriptor PropertyDescriptor
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* @param propertyName 属性名
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* @return {Property}
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*/
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public static Property getProperty(Class<?> propertyType, PropertyDescriptor propertyDescriptor, String propertyName) {
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Method readMethod = propertyDescriptor.getReadMethod();
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Method writeMethod = propertyDescriptor.getWriteMethod();
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return new Property(propertyType, readMethod, writeMethod, propertyName);
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}
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/**
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* 获取 bean 的属性信息
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* @param propertyType 类型
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* @param propertyName 属性名
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* @return {Property}
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*/
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@Nullable
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public static TypeDescriptor getTypeDescriptor(Class<?> propertyType, String propertyName) {
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Property property = ReflectUtil.getProperty(propertyType, propertyName);
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if (property == null) {
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return null;
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}
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return new TypeDescriptor(property);
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}
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/**
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* 获取 类属性信息
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* @param propertyType 类型
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* @param propertyDescriptor PropertyDescriptor
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* @param propertyName 属性名
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* @return {Property}
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*/
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public static TypeDescriptor getTypeDescriptor(Class<?> propertyType, PropertyDescriptor propertyDescriptor, String propertyName) {
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Method readMethod = propertyDescriptor.getReadMethod();
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Method writeMethod = propertyDescriptor.getWriteMethod();
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Property property = new Property(propertyType, readMethod, writeMethod, propertyName);
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return new TypeDescriptor(property);
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}
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/**
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* 获取 类属性
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* @param clazz 类信息
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* @param fieldName 属性名
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* @return Field
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*/
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@Nullable
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public static Field getField(Class<?> clazz, String fieldName) {
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while (clazz != Object.class) {
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try {
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return clazz.getDeclaredField(fieldName);
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} catch (NoSuchFieldException e) {
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clazz = clazz.getSuperclass();
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}
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}
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return null;
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}
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/**
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* 获取 所有 field 属性上的注解
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* @param clazz 类
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* @param fieldName 属性名
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* @param annotationClass 注解
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* @param <T> 注解泛型
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* @return 注解
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*/
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@Nullable
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public static <T extends Annotation> T getAnnotation(Class<?> clazz, String fieldName, Class<T> annotationClass) {
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Field field = ReflectUtil.getField(clazz, fieldName);
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if (field == null) {
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return null;
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}
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return field.getAnnotation(annotationClass);
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}
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}
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