org.springframework.data.redis.hash.DecoratingStringHashMapper Maven / Gradle / Ivy
/*
* Copyright 2011-2018 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
*
* 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.springframework.data.redis.hash;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* Delegating hash mapper used for flattening objects into Strings. Suitable when dealing with mappers that support
* Strings and type conversion.
*
* @author Costin Leau
*/
public class DecoratingStringHashMapper implements HashMapper {
private final HashMapper delegate;
public DecoratingStringHashMapper(HashMapper mapper) {
this.delegate = mapper;
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.hash.HashMapper#fromHash(java.util.Map)
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
@Override
public T fromHash(Map hash) {
return (T) delegate.fromHash(hash);
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.hash.HashMapper#toHash(java.lang.Object)
*/
@Override
public Map toHash(T object) {
Map hash = delegate.toHash(object);
Map flatten = new LinkedHashMap<>(hash.size());
for (Map.Entry entry : hash.entrySet()) {
flatten.put(String.valueOf(entry.getKey()), String.valueOf(entry.getValue()));
}
return flatten;
}
}