package com.fasterxml.jackson.databind.module;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;


import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.deser.KeyDeserializers;
import com.fasterxml.jackson.databind.type.ClassKey;

Simple implementation KeyDeserializers which allows registration of deserializers based on raw (type erased class). It can work well for basic bean and scalar type deserializers, but is not a good fit for handling generic types (like Maps and Collections or array types).

Unlike SimpleSerializers, this class does not currently support generic mappings; all mappings must be to exact declared deserialization type.

/** * Simple implementation {@link KeyDeserializers} which allows registration of * deserializers based on raw (type erased class). * It can work well for basic bean and scalar type deserializers, but is not * a good fit for handling generic types (like {@link Map}s and {@link Collection}s * or array types). *<p> * Unlike {@link SimpleSerializers}, this class does not currently support generic mappings; * all mappings must be to exact declared deserialization type. */
public class SimpleKeyDeserializers implements KeyDeserializers, java.io.Serializable // since 2.1 { private static final long serialVersionUID = 1L; protected HashMap<ClassKey,KeyDeserializer> _classMappings = null; /* /********************************************************** /* Life-cycle, construction and configuring /********************************************************** */ public SimpleKeyDeserializers() { } public SimpleKeyDeserializers addDeserializer(Class<?> forClass, KeyDeserializer deser) { if (_classMappings == null) { _classMappings = new HashMap<ClassKey,KeyDeserializer>(); } _classMappings.put(new ClassKey(forClass), deser); return this; } /* /********************************************************** /* Serializers implementation /********************************************************** */ @Override public KeyDeserializer findKeyDeserializer(JavaType type, DeserializationConfig config, BeanDescription beanDesc) { if (_classMappings == null) { return null; } return _classMappings.get(new ClassKey(type.getRawClass())); } }