TypeWrappedDeserializer.java

package tools.jackson.databind.deser.impl;

import java.util.Collection;

import tools.jackson.core.JacksonException;
import tools.jackson.core.JsonParser;
import tools.jackson.databind.*;
import tools.jackson.databind.jsontype.TypeDeserializer;
import tools.jackson.databind.type.LogicalType;

/**
 * Simple deserializer that will call configured type deserializer, passing
 * in configured data deserializer, and exposing it all as a simple
 * deserializer.
 * This is necessary when there is no "parent" deserializer which could handle
 * details of calling a {@link TypeDeserializer}, most commonly used with
 * root values.
 */
public final class TypeWrappedDeserializer
    extends ValueDeserializer<Object>
{
    final protected TypeDeserializer _typeDeserializer;
    final protected ValueDeserializer<Object> _deserializer;

    @SuppressWarnings("unchecked")
    public TypeWrappedDeserializer(TypeDeserializer typeDeser, ValueDeserializer<?> deser)
    {
        super();
        _typeDeserializer = typeDeser;
        _deserializer = (ValueDeserializer<Object>) deser;
    }

    @Override // since 2.12
    public LogicalType logicalType() {
        return _deserializer.logicalType();
    }

    @Override
    public Class<?> handledType() {
        return _deserializer.handledType();
    }

    @Override // since 2.9
    public Boolean supportsUpdate(DeserializationConfig config) {
        return _deserializer.supportsUpdate(config);
    }

    @Override
    public ValueDeserializer<?> getDelegatee() {
        return _deserializer.getDelegatee();
    }

    @Override
    public Collection<Object> getKnownPropertyNames() {
        return _deserializer.getKnownPropertyNames();
    }

    @Override
    public Object getNullValue(DeserializationContext ctxt) {
        return _deserializer.getNullValue(ctxt);
    }

    @Override
    public Object getEmptyValue(DeserializationContext ctxt){
        return _deserializer.getEmptyValue(ctxt);
    }

    @Override
    public Object deserialize(JsonParser p, DeserializationContext ctxt)
        throws JacksonException
    {
        return _deserializer.deserializeWithType(p, ctxt, _typeDeserializer);
    }

    @Override
    public Object deserializeWithType(JsonParser p, DeserializationContext ctxt,
            TypeDeserializer typeDeserializer)
        throws JacksonException
    {
        // should never happen? (if it can, could call on that object)
        throw new IllegalStateException("Type-wrapped deserializer's deserializeWithType should never get called");
    }

    @Override
    public Object deserialize(JsonParser p, DeserializationContext ctxt,
            Object intoValue)
        throws JacksonException
    {
        // 01-Mar-2013, tatu: Hmmh. Tough call as to what to do... need
        //   to delegate, but will this work reliably? Let's just hope so:
        return _deserializer.deserialize(p,  ctxt, intoValue);
    }
}