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package com.fasterxml.jackson.databind.module;

import java.util.*;

import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.deser.Deserializers;
import com.fasterxml.jackson.databind.jsontype.TypeDeserializer;
import com.fasterxml.jackson.databind.type.*;

/**
 * Simple implementation {@link Deserializers} 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).
 *

* Unlike {@link SimpleSerializers}, this class does not currently support generic mappings; * all mappings must be to exact declared deserialization type. */ public class SimpleDeserializers implements Deserializers, java.io.Serializable { private static final long serialVersionUID = 1L; protected HashMap> _classMappings = null; /** * Flag to help find "generic" enum deserializer, if one has been registered. * * @since 2.3 */ protected boolean _hasEnumDeserializer = false; /* /********************************************************** /* Life-cycle, construction and configuring /********************************************************** */ public SimpleDeserializers() { } /** * @since 2.1 */ public SimpleDeserializers(Map,JsonDeserializer> desers) { addDeserializers(desers); } public void addDeserializer(Class forClass, JsonDeserializer deser) { ClassKey key = new ClassKey(forClass); if (_classMappings == null) { _classMappings = new HashMap>(); } _classMappings.put(key, deser); // [Issue#227]: generic Enum deserializer? if (forClass == Enum.class) { _hasEnumDeserializer = true; } } /** * @since 2.1 */ @SuppressWarnings("unchecked") public void addDeserializers(Map,JsonDeserializer> desers) { for (Map.Entry,JsonDeserializer> entry : desers.entrySet()) { Class cls = entry.getKey(); // what a mess... nominal generics safety... JsonDeserializer deser = (JsonDeserializer) entry.getValue(); addDeserializer((Class) cls, deser); } } /* /********************************************************** /* Serializers implementation /********************************************************** */ @Override public JsonDeserializer findArrayDeserializer(ArrayType type, DeserializationConfig config, BeanDescription beanDesc, TypeDeserializer elementTypeDeserializer, JsonDeserializer elementDeserializer) throws JsonMappingException { return _find(type); } @Override public JsonDeserializer findBeanDeserializer(JavaType type, DeserializationConfig config, BeanDescription beanDesc) throws JsonMappingException { return _find(type); } @Override public JsonDeserializer findCollectionDeserializer(CollectionType type, DeserializationConfig config, BeanDescription beanDesc, TypeDeserializer elementTypeDeserializer, JsonDeserializer elementDeserializer) throws JsonMappingException { return _find(type); } @Override public JsonDeserializer findCollectionLikeDeserializer(CollectionLikeType type, DeserializationConfig config, BeanDescription beanDesc, TypeDeserializer elementTypeDeserializer, JsonDeserializer elementDeserializer) throws JsonMappingException { return _find(type); } @Override public JsonDeserializer findEnumDeserializer(Class type, DeserializationConfig config, BeanDescription beanDesc) throws JsonMappingException { if (_classMappings == null) { return null; } JsonDeserializer deser = _classMappings.get(new ClassKey(type)); if (deser == null) { if (_hasEnumDeserializer && type.isEnum()) { deser = _classMappings.get(new ClassKey(Enum.class)); } } return deser; } @Override public JsonDeserializer findTreeNodeDeserializer(Class nodeType, DeserializationConfig config, BeanDescription beanDesc) throws JsonMappingException { if (_classMappings == null) { return null; } return _classMappings.get(new ClassKey(nodeType)); } @Override public JsonDeserializer findReferenceDeserializer(ReferenceType refType, DeserializationConfig config, BeanDescription beanDesc, TypeDeserializer contentTypeDeserializer, JsonDeserializer contentDeserializer) throws JsonMappingException { // 21-Oct-2015, tatu: Unlikely this will really get used (reference types need more // work, simple registration probably not sufficient). But whatever. return _find(refType); } @Override public JsonDeserializer findMapDeserializer(MapType type, DeserializationConfig config, BeanDescription beanDesc, KeyDeserializer keyDeserializer, TypeDeserializer elementTypeDeserializer, JsonDeserializer elementDeserializer) throws JsonMappingException { return _find(type); } @Override public JsonDeserializer findMapLikeDeserializer(MapLikeType type, DeserializationConfig config, BeanDescription beanDesc, KeyDeserializer keyDeserializer, TypeDeserializer elementTypeDeserializer, JsonDeserializer elementDeserializer) throws JsonMappingException { return _find(type); } private final JsonDeserializer _find(JavaType type) { if (_classMappings == null) { return null; } return _classMappings.get(new ClassKey(type.getRawClass())); } }