io.progix.dropwizard.patch.ContextualJsonPatchDeserializer Maven / Gradle / Ivy

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An implementation of the HTTP method PATCH using RFC6902 for the Dropwizard framework.

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/*
 * Copyright 2014 Tariq Bugrara
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.progix.dropwizard.patch;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.ObjectMapper;
import io.dropwizard.jackson.Jackson;
import io.progix.jackson.JsonPatchOperation;

import java.io.IOException;
import java.util.Arrays;

/**
 * {@link JsonDeserializer} for {@link ContextualJsonPatch}
 * 
 * A custom deserializer is needed to convert an array of {@link JsonPatchOperation} into the {@link
 * ContextualJsonPatch} object.
 */
public class ContextualJsonPatchDeserializer extends JsonDeserializer> {

    @Override
    public ContextualJsonPatch deserialize(JsonParser jp,
                                              DeserializationContext ctxt) throws IOException, JsonProcessingException {
        ObjectMapper mapper = Jackson.newObjectMapper();
        JsonPatchOperation[] instructions = mapper.readValue(jp, JsonPatchOperation[].class);
        return new ContextualJsonPatch