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feat:属性拷贝选项添加属性过滤器

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kfyty725 2021-03-19 14:19:26 +08:00
parent 3f4e0540db
commit d8de98cbfc
3 changed files with 38 additions and 0 deletions
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6
hutool-core/src/main/java/cn/hutool/core/bean/copier/BeanCopier.java
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@ -188,6 +188,9 @@ public class BeanCopier<T> implements Copier<T>, Serializable {
throw new BeanException(e, "Get value of [{}] error!", prop.getFieldName());
}
}
if(!copyOptions.propertiesFilter.test(prop.getField(), value)) {
return;
}
if ((null == value && copyOptions.ignoreNullValue) || bean == value) {
// 当允许跳过空时，跳过
//值不能为bean本身，防止循环引用，此类也跳过
@ -245,6 +248,9 @@ public class BeanCopier<T> implements Copier<T>, Serializable {
// 获取属性值
Object value = valueProvider.value(providerKey, fieldType);
if(!copyOptions.propertiesFilter.test(prop.getField(), value)) {
return;
}
if ((null == value && copyOptions.ignoreNullValue) || bean == value) {
// 当允许跳过空时，跳过
// 值不能为bean本身，防止循环引用

19
hutool-core/src/main/java/cn/hutool/core/bean/copier/CopyOptions.java
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@ -5,7 +5,9 @@ import cn.hutool.core.map.MapUtil;
import cn.hutool.core.util.ObjectUtil;
import java.io.Serializable;
import java.lang.reflect.Field;
import java.util.Map;
import java.util.function.BiPredicate;
/**
* 属性拷贝选项<br>
@ -27,6 +29,10 @@ public class CopyOptions implements Serializable {
* 是否忽略空值，当源对象的值为null时，true: 忽略而不注入此值，false: 注入null
*/
protected boolean ignoreNullValue;
/**
* 属性过滤器，断言通过的属性才会被复制
*/
protected BiPredicate<Field, Object> propertiesFilter;
/**
* 忽略的目标对象中属性列表，设置一个属性列表，不拷贝这些属性值
*/
@ -81,6 +87,7 @@ public class CopyOptions implements Serializable {
* 构造拷贝选项
*/
public CopyOptions() {
this.propertiesFilter = (f, v) -> true;
}
/**
@ -91,6 +98,7 @@ public class CopyOptions implements Serializable {
* @param ignoreProperties 忽略的目标对象中属性列表，设置一个属性列表，不拷贝这些属性值
*/
public CopyOptions(Class<?> editable, boolean ignoreNullValue, String... ignoreProperties) {
this();
this.editable = editable;
this.ignoreNullValue = ignoreNullValue;
this.ignoreProperties = ignoreProperties;
@ -128,6 +136,17 @@ public class CopyOptions implements Serializable {
return setIgnoreNullValue(true);
}
/**
* 属性过滤器，断言通过的属性才会被复制
*
* @param propertiesFilter 属性过滤器
* @return CopyOptions
*/
public CopyOptions setPropertiesFilter(BiPredicate<Field, Object> propertiesFilter) {
this.propertiesFilter = propertiesFilter;
return this;
}
/**
* 设置忽略的目标对象中属性列表，设置一个属性列表，不拷贝这些属性值
*

13
hutool-core/src/test/java/cn/hutool/core/bean/BeanUtilTest.java
View File

@ -6,6 +6,7 @@ import cn.hutool.core.bean.copier.ValueProvider;
import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.map.MapUtil;
import cn.hutool.core.util.ArrayUtil;
import cn.hutool.core.util.StrUtil;
import lombok.Data;
import lombok.Getter;
import lombok.Setter;
@ -461,6 +462,18 @@ public class BeanUtilTest {
Assert.assertNull(newFood.getCode());
}
@Test
public void copyBeanPropertiesFilterTest() {
Food info = new Food();
info.setBookID("0");
info.setCode("");
Food newFood = new Food();
CopyOptions copyOptions = CopyOptions.create().setPropertiesFilter((f, v) -> !(v instanceof CharSequence) || StrUtil.isNotBlank(v.toString()));
BeanUtil.copyProperties(info, newFood, copyOptions);
Assert.assertEquals(info.getBookID(), newFood.getBookID());
Assert.assertNull(newFood.getCode());
}
@Data
public static class Food {
@Alias("bookId")