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

Show more of this group Show more artifacts with this name
Show all versions of jackson-databind Show documentation
General data-binding functionality for Jackson: works on core streaming API
There is a newer version: 2.17.0
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.
 * 
 * @author tatu
 */
public class AsArrayTypeDeserializer
    extends TypeDeserializerBase
    implements java.io.Serializable
{
    private static final long serialVersionUID = 5345570420394408290L;

    public AsArrayTypeDeserializer(JavaType bt, TypeIdResolver idRes,
            String typePropertyName, boolean typeIdVisible, Class defaultImpl)
    {
        super(bt, idRes, typePropertyName, typeIdVisible, defaultImpl);
    }

    public AsArrayTypeDeserializer(AsArrayTypeDeserializer src, BeanProperty property) {
        super(src, property);
    }
    
    @Override
    public TypeDeserializer forProperty(BeanProperty prop) {
        if (prop == _property) { // usually if it's null
            return this;
        }
        return 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, JsonProcessingException
    {
        return _deserialize(jp, ctxt);
    }

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

    @Override
    public Object deserializeTypedFromAny(JsonParser jp, DeserializationContext ctxt)
        throws IOException, JsonProcessingException
    {
        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.
     */
    private final Object _deserialize(JsonParser jp, DeserializationContext ctxt)
        throws IOException, JsonProcessingException
    {
        boolean hadStartArray = jp.isExpectedStartArrayToken();
        String typeId = _locateTypeId(jp, ctxt);
        JsonDeserializer