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HIPPO4J、HIPPO4J-CORE 公共代码库.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 cn.hippo4j.common.toolkit;
import cn.hippo4j.common.web.exception.IllegalException;
import com.github.dozermapper.core.DozerBeanMapperBuilder;
import com.github.dozermapper.core.Mapper;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;
import org.springframework.beans.BeanUtils;
import java.beans.IntrospectionException;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.*;
/**
* Bean util.
*/
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public class BeanUtil {
protected static Mapper BEAN_MAPPER_BUILDER;
static {
BEAN_MAPPER_BUILDER = DozerBeanMapperBuilder.buildDefault();
}
public static T convert(S source, Class clazz) {
return Optional.ofNullable(source)
.map(each -> BEAN_MAPPER_BUILDER.map(each, clazz))
.orElse(null);
}
public static T convert(S source, T target) {
Optional.ofNullable(source)
.ifPresent(each -> BEAN_MAPPER_BUILDER.map(each, target));
return target;
}
public static List convert(List sources, Class clazz) {
return Optional.ofNullable(sources)
.map(each -> {
List targetList = new ArrayList(each.size());
each.forEach(item -> targetList.add(BEAN_MAPPER_BUILDER.map(item, clazz)));
return targetList;
})
.orElse(null);
}
public static Set convert(Set sources, Class clazz) {
return Optional.ofNullable(sources)
.map(each -> {
Set targetSize = new HashSet(each.size());
each.forEach(item -> targetSize.add(BEAN_MAPPER_BUILDER.map(item, clazz)));
return targetSize;
})
.orElse(null);
}
public static T mapToBean(Map map, Class clazz, boolean toCamelCase) {
if (clazz == null) {
return null;
}
try {
T newInstance = clazz.newInstance();
return mapToBean(map, newInstance, toCamelCase);
} catch (InstantiationException | IllegalAccessException e) {
throw new IllegalException("do not create instance for " + clazz.getName(), e);
}
}
/**
* map to bean
*
* @param map map
* @param bean obj bean
* @param toCamelCase format to camel case
* @param bean type
* @return T
*/
public static T mapToBean(Map map, T bean, boolean toCamelCase) {
if (bean == null) {
return null;
}
if (map.isEmpty()) {
return bean;
}
Class> clazz = bean.getClass();
map.forEach((s, o) -> {
String name = toCamelCase ? StringUtil.toCamelCase(s, StringUtil.UNDERLINE) : s;
Method method = setter(clazz, name);
if (method != null) {
ReflectUtil.invoke(bean, method, o);
}
});
return bean;
}
/**
* getter for properties
*
* @param o obj
* @param propertiesName name
* @return Method for get
*/
public static Method getter(Class> o, String propertiesName) {
if (o == null) {
return null;
}
try {
PropertyDescriptor descriptor = new PropertyDescriptor(propertiesName, o);
return descriptor.getReadMethod();
} catch (IntrospectionException e) {
throw new IllegalException("not find getter for" + propertiesName + "in" + o.getName(), e);
}
}
/**
* setter for properties
*
* @param o obj
* @param propertiesName name
* @return Method for set
*/
public static Method setter(Class> o, String propertiesName) {
if (o == null) {
return null;
}
try {
PropertyDescriptor descriptor = new PropertyDescriptor(propertiesName, o);
return descriptor.getWriteMethod();
} catch (IntrospectionException e) {
throw new IllegalException("not find setter for" + propertiesName + "in" + o.getName(), e);
}
}
}
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