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/*
* Copyright 2016-2020 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.io.IOException;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.springframework.data.mapping.MappingException;
import org.springframework.data.util.DirectFieldAccessFallbackBeanWrapper;
import org.springframework.util.Assert;
import org.springframework.util.NumberUtils;
import org.springframework.util.StringUtils;
import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.annotation.JsonTypeInfo.As;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectMapper.DefaultTyping;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.deser.std.UntypedObjectDeserializer;
import com.fasterxml.jackson.databind.jsontype.TypeDeserializer;
import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.CalendarSerializer;
import com.fasterxml.jackson.databind.ser.std.DateSerializer;
/**
* {@link ObjectMapper} based {@link HashMapper} implementation that allows flattening. Given an entity {@code Person}
* with an {@code Address} like below the flattening will create individual hash entries for all nested properties and
* resolve complex types into simple types, as far as possible.
*
* Flattening requires all property names to not interfere with JSON paths. Using dots or brackets in map keys or as
* property names is not supported using flattening. The resulting hash cannot be mapped back into an Object.
*
*
Example
*
*
* class Person {
* String firstname;
* String lastname;
* Address address;
* Date date;
* LocalDateTime localDateTime;
* }
*
* class Address {
* String city;
* String country;
* }
*
*
*
Normal
*
*
*
Hash field
*
Value
*
*
*
firstname
*
Jon
*
*
*
lastname
*
Snow
*
*
*
address
*
{ "city" : "Castle Black", "country" : "The North" }
*
*
*
date
*
1561543964015
*
*
*
localDateTime
*
2018-01-02T12:13:14
*
*
*
Flat
*
*
*
Hash field
*
Value
*
*
*
firstname
*
Jon
*
*
*
lastname
*
Snow
*
*
*
address.city
*
Castle Black
*
*
*
address.country
*
The North
*
*
*
date
*
1561543964015
*
*
*
localDateTime
*
2018-01-02T12:13:14
*
*
*
* @author Christoph Strobl
* @author Mark Paluch
* @since 1.8
*/
public class Jackson2HashMapper implements HashMapper