com.fasterxml.jackson.databind.jsontype.impl.AsArrayTypeDeserializer Maven / Gradle / Ivy

package com.fasterxml.jackson.databind.jsontype.impl;

import java.io.IOException;

import com.fasterxml.jackson.annotation.JsonTypeInfo.As;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.core.util.JsonParserSequence;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.jsontype.TypeDeserializer;
import com.fasterxml.jackson.databind.jsontype.TypeIdResolver;
import com.fasterxml.jackson.databind.util.TokenBuffer;

/**
 * Type deserializer used with {@link As#WRAPPER_ARRAY}
 * inclusion mechanism. Simple since JSON structure used is always
 * the same, regardless of structure used for actual value: wrapping
 * is done using a 2-element JSON Array where type id is the first
 * element, and actual object data as second element.
 */
public class AsArrayTypeDeserializer
    extends TypeDeserializerBase
    implements java.io.Serializable
{
    private static final long serialVersionUID = 1L;

    /**
     * @since 2.8
     */
    public AsArrayTypeDeserializer(JavaType bt, TypeIdResolver idRes,
            String typePropertyName, boolean typeIdVisible, JavaType defaultImpl)
    {
        super(bt, idRes, typePropertyName, typeIdVisible, defaultImpl);
    }

    public AsArrayTypeDeserializer(AsArrayTypeDeserializer src, BeanProperty property) {
        super(src, property);
    }
    
    @Override
    public TypeDeserializer forProperty(BeanProperty prop) {
        // usually if it's null:
        return (prop == _property) ? this : new AsArrayTypeDeserializer(this, prop);
    }
    
    @Override
    public As getTypeInclusion() { return As.WRAPPER_ARRAY; }

    /**
     * Method called when actual object is serialized as JSON Array.
     */
    @Override
    public Object deserializeTypedFromArray(JsonParser jp, DeserializationContext ctxt) throws IOException {
        return _deserialize(jp, ctxt);
    }

    /**
     * Method called when actual object is serialized as JSON Object
     */
    @Override
    public Object deserializeTypedFromObject(JsonParser jp, DeserializationContext ctxt) throws IOException {
        return _deserialize(jp, ctxt);
    }
    
    @Override
    public Object deserializeTypedFromScalar(JsonParser jp, DeserializationContext ctxt) throws IOException {
        return _deserialize(jp, ctxt);
    }    

    @Override
    public Object deserializeTypedFromAny(JsonParser jp, DeserializationContext ctxt) throws IOException {
        return _deserialize(jp, ctxt);
    }    
    
    /*
    /***************************************************************
    /* Internal methods
    /***************************************************************
     */

    /**
     * Method that handles type information wrapper, locates actual
     * subtype deserializer to use, and calls it to do actual
     * deserialization.
     */
    @SuppressWarnings("resource")
    protected Object _deserialize(JsonParser p, DeserializationContext ctxt) throws IOException
    {
        // 02-Aug-2013, tatu: May need to use native type ids
        if (p.canReadTypeId()) {
            Object typeId = p.getTypeId();
            if (typeId != null) {
                return _deserializeWithNativeTypeId(p, ctxt, typeId);
            }
        }
        boolean hadStartArray = p.isExpectedStartArrayToken();
        String typeId = _locateTypeId(p, ctxt);
        JsonDeserializer