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com.fasterxml.jackson.module.guava.GuavaDeserializers Maven / Gradle / Ivy
package com.fasterxml.jackson.module.guava;
import com.fasterxml.jackson.module.guava.deser.*;
import com.google.common.base.Optional;
import com.google.common.collect.*;
import org.codehaus.jackson.map.*;
import org.codehaus.jackson.map.type.CollectionType;
import org.codehaus.jackson.map.type.MapType;
import org.codehaus.jackson.type.JavaType;
/**
* Custom deserializers module offers.
*
* @author tsaloranta
*/
public class GuavaDeserializers
extends Deserializers.Base
{
@Override
public JsonDeserializer findBeanDeserializer(JavaType type,
DeserializationConfig config,
DeserializerProvider provider,
BeanDescription beanDesc,
BeanProperty property) throws JsonMappingException {
if (Optional.class.isAssignableFrom(type.getRawClass())) {
final JavaType elementType = type.containedType(0);
return new OptionalDeserializer(
provider.findTypedValueDeserializer(config, elementType, property));
}
return super.findBeanDeserializer(type, config, provider, beanDesc, property);
}
/**
* Concrete implementation class to use for properties declared as
* {@link Multiset}s.
* Defaults to using
*/
// protected Class> _cfgDefaultMultiset;
// protected Class> _cfgDefaultMultimap;
/*
* No bean types to support yet; may need to add?
*/
/*
public JsonDeserializer findBeanDeserializer(JavaType type,
DeserializationConfig config, DeserializerProvider provider,
BeanDescription beanDesc) {
return null;
}
*/
@Override
public JsonDeserializer findCollectionDeserializer(CollectionType type,
DeserializationConfig config, DeserializerProvider provider,
BeanDescription beanDesc, BeanProperty property,
TypeDeserializer elementTypeDeser, JsonDeserializer elementDeser)
throws JsonMappingException
{
Class raw = type.getRawClass();
// Multi-xxx collections?
if (Multiset.class.isAssignableFrom(raw)) {
// Quite a few variations...
if (LinkedHashMultiset.class.isAssignableFrom(raw)) {
// !!! TODO
}
if (HashMultiset.class.isAssignableFrom(raw)) {
return new HashMultisetDeserializer(type, elementTypeDeser,
_verifyElementDeserializer(elementDeser, type, config, provider));
}
if (ImmutableMultiset.class.isAssignableFrom(raw)) {
// !!! TODO
}
if (EnumMultiset.class.isAssignableFrom(raw)) {
// !!! TODO
}
if (TreeMultiset.class.isAssignableFrom(raw)) {
// !!! TODO
}
// TODO: make configurable (for now just default blindly)
return new HashMultisetDeserializer(type, elementTypeDeser,
_verifyElementDeserializer(elementDeser, type, config, provider));
}
// ImmutableXxx types?
if (ImmutableCollection.class.isAssignableFrom(raw)) {
if (ImmutableList.class.isAssignableFrom(raw)) {
return new ImmutableListDeserializer(type, elementTypeDeser,
_verifyElementDeserializer(elementDeser, type, config, provider));
}
if (ImmutableSet.class.isAssignableFrom(raw)) {
// sorted one?
if (ImmutableSortedSet.class.isAssignableFrom(raw)) {
/* 28-Nov-2010, tatu: With some more work would be able to use other things
* than natural ordering; but that'll have to do for now...
*/
Class elemType = type.getContentType().getRawClass();
if (!Comparable.class.isAssignableFrom(elemType)) {
throw new IllegalArgumentException("Can not handle ImmutableSortedSet with elements that are not Comparable ("
+raw.getName()+")");
}
return new ImmutableSortedSetDeserializer(type, elementTypeDeser,
_verifyElementDeserializer(elementDeser, type, config, provider));
}
// nah, just regular one
return new ImmutableSetDeserializer(type, elementTypeDeser,
_verifyElementDeserializer(elementDeser, type, config, provider));
}
}
return null;
}
/**
* A few Map types to support.
*/
@Override
public JsonDeserializer findMapDeserializer(MapType type,
DeserializationConfig config, DeserializerProvider provider,
BeanDescription beanDesc, BeanProperty property, KeyDeserializer keyDeser,
TypeDeserializer elementTypeDeser, JsonDeserializer elementDeser)
throws JsonMappingException
{
Class raw = type.getRawClass();
// ImmutableXxxMap types?
if (ImmutableMap.class.isAssignableFrom(raw)) {
if (ImmutableSortedMap.class.isAssignableFrom(raw)) {
// !!! TODO
}
if (ImmutableBiMap.class.isAssignableFrom(raw)) {
// !!! TODO
}
// Otherwise, plain old ImmutableMap...
return new ImmutableMapDeserializer(type, keyDeser, elementTypeDeser,
_verifyElementDeserializer(elementDeser, type, config, provider));
}
// Multimaps?
if (Multimap.class.isAssignableFrom(raw)) {
if (ListMultimap.class.isAssignableFrom(raw)) {
// !!! TODO
}
if (SetMultimap.class.isAssignableFrom(raw)) {
// !!! TODO
}
if (SortedSetMultimap.class.isAssignableFrom(raw)) {
// !!! TODO
}
}
return null;
}
/*
/**********************************************************************
/* Helper methods
/**********************************************************************
*/
/**
* Helper method used to ensure that we have a deserializer for elements
* of collection being deserialized.
*/
JsonDeserializer _verifyElementDeserializer(JsonDeserializer deser,
JavaType type,
DeserializationConfig config, DeserializerProvider provider)
throws JsonMappingException
{
if (deser == null) {
// 'null' -> collections have no referring fields
deser = provider.findValueDeserializer(config, type.getContentType(), null);
}
return deser;
}
}
