com.github.jonpeterson.jackson.module.versioning.VersioningBeanDeserializationModifier.java Source code

Introduction

Here is the source code for com.github.jonpeterson.jackson.module.versioning.VersioningBeanDeserializationModifier.java

Source

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2016 Jon Peterson
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package com.github.jonpeterson.jackson.module.versioning;

import com.fasterxml.jackson.databind.BeanDescription;
import com.fasterxml.jackson.databind.DeserializationConfig;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.deser.BeanDeserializerModifier;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import com.fasterxml.jackson.databind.introspect.BeanPropertyDefinition;

class VersioningBeanDeserializationModifier extends BeanDeserializerModifier {

    // here just to make generics work without warnings
    private static <T> VersionedModelDeserializer<T> createVersioningDeserializer(StdDeserializer<T> deserializer,
            JsonVersionedModel jsonVersionedModel, BeanPropertyDefinition serializeToVersionProperty) {
        return new VersionedModelDeserializer<T>(deserializer, jsonVersionedModel, serializeToVersionProperty);
    }

    @Override
    public JsonDeserializer<?> modifyDeserializer(DeserializationConfig config, BeanDescription beanDescription,
            JsonDeserializer<?> deserializer) {
        if (deserializer instanceof StdDeserializer) {
            JsonVersionedModel jsonVersionedModel = beanDescription.getClassAnnotations()
                    .get(JsonVersionedModel.class);
            if (jsonVersionedModel != null)
                return createVersioningDeserializer((StdDeserializer) deserializer, jsonVersionedModel,
                        VersionedModelUtils.getSerializeToVersionProperty(beanDescription));
        }

        return deserializer;
    }
}