spring-data-redis BeanUtilsHashMapper 源码
spring-data-redis BeanUtilsHashMapper 代码
文件路径：/src/main/java/org/springframework/data/redis/hash/BeanUtilsHashMapper.java
/*
* Copyright 2011-2022 the original author or authors.
*
* 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
*
* https://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.springframework.data.redis.hash;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
import org.apache.commons.beanutils.BeanUtils;
/**
* HashMapper based on Apache Commons BeanUtils project. Does NOT supports nested properties.
*
* @author Costin Leau
* @author Christoph Strobl
* @author Mark Paluch
*/
public class BeanUtilsHashMapper<T> implements HashMapper<T, String, String> {
private final Class<T> type;
/**
* Create a new {@link BeanUtilsHashMapper} for the given {@code type}.
*
* @param type must not be {@literal null}.
*/
public BeanUtilsHashMapper(Class<T> type) {
this.type = type;
}
@Override
public T fromHash(Map<String, String> hash) {
T instance = org.springframework.beans.BeanUtils.instantiateClass(type);
try {
BeanUtils.populate(instance, hash);
return instance;
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
@Override
public Map<String, String> toHash(T object) {
try {
Map<String, String> map = BeanUtils.describe(object);
Map<String, String> result = new LinkedHashMap<>();
for (Entry<String, String> entry : map.entrySet()) {
if (entry.getValue() != null) {
result.put(entry.getKey(), entry.getValue());
}
}
return result;
} catch (Exception ex) {
throw new IllegalArgumentException("Cannot describe object " + object, ex);
}
}
}
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