mirror of
https://gitee.com/chinabugotech/hutool.git
synced 2025-04-19 03:01:48 +08:00
add FieldInvoker
This commit is contained in:
Looly
parent
024c236fac
commit
264d24b54c
@ -0,0 +1,166 @@
|
||||
/*
|
||||
* Copyright (c) 2024 Hutool Team and hutool.cn
|
||||
*
|
||||
* 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
|
||||
*
|
||||
* http://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 org.dromara.hutool.core.reflect;
|
||||
|
||||
import org.dromara.hutool.core.array.ArrayUtil;
|
||||
import org.dromara.hutool.core.convert.Converter;
|
||||
import org.dromara.hutool.core.exception.HutoolException;
|
||||
import org.dromara.hutool.core.lang.Assert;
|
||||
|
||||
import java.lang.reflect.Field;
|
||||
|
||||
/**
|
||||
* 字段调用器<br>
|
||||
* 通过反射读取或赋值字段<br>
|
||||
* 读取字段值：
|
||||
* <pre>{@code
|
||||
* FieldInvoker.of(Field).invoke(obj);
|
||||
* }</pre>
|
||||
*
|
||||
* 赋值字段值：
|
||||
* <pre>{@code
|
||||
* FieldInvoker.of(Field).invoke(obj, value);
|
||||
* }</pre>
|
||||
*
|
||||
* @author looly
|
||||
* @since 6.0.0
|
||||
*/
|
||||
public class FieldInvoker implements Invoker {
|
||||
|
||||
/**
|
||||
* 创建字段调用器
|
||||
*
|
||||
* @param field 字段
|
||||
* @return {@code FieldInvoker}
|
||||
*/
|
||||
public static FieldInvoker of(final Field field) {
|
||||
return new FieldInvoker(field);
|
||||
}
|
||||
|
||||
private final Field field;
|
||||
private Converter converter;
|
||||
|
||||
/**
|
||||
* 构造
|
||||
*
|
||||
* @param field 字段
|
||||
*/
|
||||
public FieldInvoker(final Field field) {
|
||||
this.field = Assert.notNull(field);;
|
||||
}
|
||||
|
||||
/**
|
||||
* 设置字段值转换器
|
||||
*
|
||||
* @param converter 转换器，{@code null}表示不转换
|
||||
* @return this
|
||||
*/
|
||||
public FieldInvoker setConverter(final Converter converter) {
|
||||
this.converter = converter;
|
||||
return this;
|
||||
}
|
||||
|
||||
@SuppressWarnings("unchecked")
|
||||
@Override
|
||||
public <T> T invoke(final Object target, final Object... args) {
|
||||
if(ArrayUtil.isEmpty(args)){
|
||||
// 默认取值
|
||||
return (T) invokeGet(target);
|
||||
} else if(args.length == 1){
|
||||
invokeSet(target, args[0]);
|
||||
return null;
|
||||
}
|
||||
|
||||
throw new HutoolException("Field [{}] cannot be set with [{}] args", field.getName(), args.length);
|
||||
}
|
||||
|
||||
/**
|
||||
* 获取字段值
|
||||
*
|
||||
* @param obj 对象，static字段则此字段为null
|
||||
* @return 字段值
|
||||
* @throws HutoolException 包装IllegalAccessException异常
|
||||
*/
|
||||
public Object invokeGet(Object obj) throws HutoolException {
|
||||
if (null == field) {
|
||||
return null;
|
||||
}
|
||||
if (obj instanceof Class) {
|
||||
// 静态字段获取时对象为null
|
||||
obj = null;
|
||||
}
|
||||
|
||||
ReflectUtil.setAccessible(field);
|
||||
final Object result;
|
||||
try {
|
||||
result = field.get(obj);
|
||||
} catch (final IllegalAccessException e) {
|
||||
throw new HutoolException(e, "IllegalAccess for {}.{}", field.getDeclaringClass(), field.getName());
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
/**
|
||||
* 设置字段值，传入的字段值必须和字段类型一致，否则抛出异常
|
||||
*
|
||||
* @param obj 对象，如果是static字段，此参数为null
|
||||
* @param value 值，值类型必须与字段类型匹配
|
||||
* @throws HutoolException UtilException 包装IllegalAccessException异常
|
||||
*/
|
||||
public void invokeSet(final Object obj, final Object value) throws HutoolException {
|
||||
ReflectUtil.setAccessible(field);
|
||||
try {
|
||||
field.set(obj instanceof Class ? null : obj, convertValue(value));
|
||||
} catch (final IllegalAccessException e) {
|
||||
throw new HutoolException(e, "IllegalAccess for [{}.{}]", null == obj ? field.getDeclaringClass() : obj, field.getName());
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public Class<?> getType() {
|
||||
return field.getType();
|
||||
}
|
||||
|
||||
/**
|
||||
* 转换值类型
|
||||
*
|
||||
* @param value 值
|
||||
* @return 转换后的值
|
||||
*/
|
||||
private Object convertValue(final Object value){
|
||||
if(null == converter){
|
||||
return value;
|
||||
}
|
||||
|
||||
// 值类型检查和转换
|
||||
final Class<?> fieldType = field.getType();
|
||||
if (null != value) {
|
||||
if (!fieldType.isAssignableFrom(value.getClass())) {
|
||||
//对于类型不同的字段，尝试转换，转换失败则使用原对象类型
|
||||
final Object targetValue = converter.convert(fieldType, value);
|
||||
if (null != targetValue) {
|
||||
return targetValue;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
// 获取null对应默认值，防止原始类型造成空指针问题
|
||||
return ClassUtil.getDefaultValue(fieldType);
|
||||
}
|
||||
|
||||
return value;
|
||||
}
|
||||
}
|
||||
@ -18,7 +18,8 @@ package org.dromara.hutool.core.reflect;
|
||||
|
||||
import org.dromara.hutool.core.annotation.Alias;
|
||||
import org.dromara.hutool.core.array.ArrayUtil;
|
||||
import org.dromara.hutool.core.convert.ConvertUtil;
|
||||
import org.dromara.hutool.core.convert.CompositeConverter;
|
||||
import org.dromara.hutool.core.convert.Converter;
|
||||
import org.dromara.hutool.core.exception.HutoolException;
|
||||
import org.dromara.hutool.core.lang.Assert;
|
||||
import org.dromara.hutool.core.map.MapUtil;
|
||||
@ -333,43 +334,23 @@ public class FieldUtil {
|
||||
* @param value 值，类型不匹配会自动转换对象类型
|
||||
* @throws HutoolException UtilException 包装IllegalAccessException异常
|
||||
*/
|
||||
public static void setFieldValue(final Object obj, final Field field, Object value) throws HutoolException {
|
||||
Assert.notNull(field, "Field in [{}] not exist !", obj);
|
||||
|
||||
// 值类型检查和转换
|
||||
final Class<?> fieldType = field.getType();
|
||||
if (null != value) {
|
||||
if (!fieldType.isAssignableFrom(value.getClass())) {
|
||||
//对于类型不同的字段，尝试转换，转换失败则使用原对象类型
|
||||
final Object targetValue = ConvertUtil.convert(fieldType, value);
|
||||
if (null != targetValue) {
|
||||
value = targetValue;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
// 获取null对应默认值，防止原始类型造成空指针问题
|
||||
value = ClassUtil.getDefaultValue(fieldType);
|
||||
}
|
||||
|
||||
setFieldValueExact(obj, field, value);
|
||||
public static void setFieldValue(final Object obj, final Field field, final Object value) throws HutoolException {
|
||||
setFieldValue(obj, field, value, CompositeConverter.getInstance());
|
||||
}
|
||||
|
||||
/**
|
||||
* 设置字段值，传入的字段值必须和字段类型一致，否则抛出异常
|
||||
* 设置字段值，如果值类型必须与字段类型匹配，会自动转换对象类型
|
||||
*
|
||||
* @param obj 对象，如果是static字段，此参数为null
|
||||
* @param field 字段
|
||||
* @param value 值，值类型必须与字段类型匹配
|
||||
* @param value 值，类型不匹配会自动转换对象类型
|
||||
* @param converter 转换器，用于转换给定value为字段类型，{@code null}表示不转换
|
||||
* @throws HutoolException UtilException 包装IllegalAccessException异常
|
||||
*/
|
||||
public static void setFieldValueExact(final Object obj, final Field field, final Object value) throws HutoolException {
|
||||
ReflectUtil.setAccessible(field);
|
||||
try {
|
||||
field.set(obj instanceof Class ? null : obj, value);
|
||||
} catch (final IllegalAccessException e) {
|
||||
throw new HutoolException(e, "IllegalAccess for [{}.{}]", null == obj ? field.getDeclaringClass() : obj, field.getName());
|
||||
}
|
||||
}
|
||||
public static void setFieldValue(final Object obj, final Field field, final Object value, final Converter converter) throws HutoolException {
|
||||
Assert.notNull(field, "Field in [{}] not exist !", obj);
|
||||
|
||||
FieldInvoker.of(field).setConverter(converter).invokeSet(obj, value);
|
||||
}
|
||||
// endregion
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user