org.aoju.bus.mapper.entity.EntityField Maven / Gradle / Ivy
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package org.aoju.bus.mapper.entity;
import java.beans.PropertyDescriptor;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
/**
* 封装字段和方法，统一调用某些方法
*
* @author Kimi Liu
* @since Java 17+
*/
public class EntityField {
/**
* 字段属性名
*/
private String name;
private Field field;
/**
* 设置javaType
*/
private Class javaType;
private Method setter;
private Method getter;
/**
* 构造方法
*
* @param field 字段
* @param propertyDescriptor 字段name对应的property
*/
public EntityField(Field field, PropertyDescriptor propertyDescriptor) {
if (field != null) {
this.field = field;
this.name = field.getName();
this.javaType = field.getType();
}
if (propertyDescriptor != null) {
this.name = propertyDescriptor.getName();
this.setter = propertyDescriptor.getWriteMethod();
this.getter = propertyDescriptor.getReadMethod();
this.javaType = propertyDescriptor.getPropertyType();
}
}
/**
* 先创建field，然后可以通过该方法获取property等属性
*
* @param other 名称信息
*/
public void copyFromPropertyDescriptor(EntityField other) {
this.setter = other.setter;
this.getter = other.getter;
this.javaType = other.javaType;
this.name = other.name;
}
/**
* 是否有该注解
*
* @param annotationClass 注解
* @return the boolean
*/
public boolean isAnnotationPresent(Class annotationClass) {
boolean result = false;
if (field != null) {
result = field.isAnnotationPresent(annotationClass);
}
if (!result && setter != null) {
result = setter.isAnnotationPresent(annotationClass);
}
if (!result && getter != null) {
result = getter.isAnnotationPresent(annotationClass);
}
return result;
}
/**
* 获取指定的注解
*
* @param annotationClass 注解信息
* @param 对象引用
* @return the annotation
*/
public T getAnnotation(Class annotationClass) {
T result = null;
if (field != null) {
result = field.getAnnotation(annotationClass);
}
if (result == null && setter != null) {
result = setter.getAnnotation(annotationClass);
}
if (result == null && getter != null) {
result = getter.getAnnotation(annotationClass);
}
return result;
}
/**
* 反射获取值
*
* @param object 对象
* @return the object
* @throws IllegalAccessException 异常
* @throws InvocationTargetException 异常
*/
public Object getValue(Object object) throws IllegalAccessException, InvocationTargetException {
Object result = null;
if (getter != null) {
result = getter.invoke(object);
} else if (field != null) {
if (!field.isAccessible()) {
field.setAccessible(true);
}
result = field.get(object);
}
return result;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
EntityField that = (EntityField) o;
return !(name != null ? !name.equals(that.name) : that.name != null);
}
@Override
public int hashCode() {
return name != null ? name.hashCode() : 0;
}
public Class getJavaType() {
return javaType;
}
public void setJavaType(Class javaType) {
this.javaType = javaType;
}
public String getName() {
return name;
}
}