com.intuit.ipp.serialization.CDCQueryResponseDeserializer Maven / Gradle / Ivy

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/*******************************************************************************
 * Copyright (c) 2017 Intuit
 *
 * 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 com.intuit.ipp.serialization;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.Version;
import com.fasterxml.jackson.databind.AnnotationIntrospector;
import com.fasterxml.jackson.databind.DeserializationConfig;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.introspect.JacksonAnnotationIntrospector;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.module.jaxb.JaxbAnnotationIntrospector;
import com.fasterxml.jackson.databind.introspect.AnnotationIntrospectorPair;
import com.fasterxml.jackson.databind.DeserializationFeature;

import com.intuit.ipp.data.CDCResponse;
import com.intuit.ipp.data.Fault;
import com.intuit.ipp.data.QueryResponse;
import com.intuit.ipp.util.Logger;

/**
 * Custom deserializer class to handle CDCResponse while unmarshall
 *
 */
public class CDCQueryResponseDeserializer extends JsonDeserializer {

	/**
	 * logger instance
	 */
	private static final org.slf4j.Logger LOG = Logger.getLogger();

	/**
	 * variable FAULT
	 */
	private static final String FAULT = "Fault";
	
	/**
	 * variable SIZE
	 */
	private static final String SIZE = "size";
	
	/**
	 * variable QUERY_RESPONSE
	 */
	private static final String QUERY_RESPONSE = "QueryResponse";
	
	@SuppressWarnings("deprecation")
	@Override
	public CDCResponse deserialize(JsonParser jp, DeserializationContext desContext) throws IOException {
		ObjectMapper mapper = new ObjectMapper();

		//Make the mapper JAXB annotations aware
		AnnotationIntrospector primary = new JaxbAnnotationIntrospector();
		AnnotationIntrospector secondary = new JacksonAnnotationIntrospector();
		AnnotationIntrospector pair = new AnnotationIntrospectorPair(primary, secondary);
		mapper.setAnnotationIntrospector(pair);
		mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);

		//Read the QueryResponse as a tree
		JsonNode jn = jp.readValueAsTree();

		//Create the QueryResponse to be returned
		CDCResponse qr = new CDCResponse();

		//Iterate over the field names
		Iterator ite = jn.fieldNames();

		while (ite.hasNext()) {
			String key = ite.next();

			//Attributes
			if (key.equals(FAULT)) {
				qr.setFault(mapper.treeToValue(jn.get(FAULT), Fault.class));
				continue;
			} else if (key.equals(SIZE)) {
				qr.setSize(jn.get(SIZE).intValue());
			} else if (key.equals(QUERY_RESPONSE)) {
                JsonNode jn1 = jn.get(key);
				if (jn1.isArray()) {
					List queryResponses = new ArrayList();
					Iterator iteJson = jn1.iterator();
					while (iteJson.hasNext()) {
						JsonNode jn2 = iteJson.next();
						QueryResponse queryResponse = getQueryResponse(jn2);
						queryResponses.add(queryResponse);
					}
					qr.setQueryResponse(queryResponses);
				}
			} else {
				// Unknown  key
				LOG.warn("Unknown key for CDCResponse :" + key);
			}
		}

		return qr;
	}

	/**
	 * Method to deserialize the QueryResponse object
	 * 
	 * @param jsonNode
	 * @return QueryResponse
	 */
	private QueryResponse getQueryResponse(JsonNode jsonNode) throws IOException {
		ObjectMapper mapper = new ObjectMapper();

		SimpleModule simpleModule = new SimpleModule("QueryResponseDeserializer", new Version(1, 0, 0, null));
		simpleModule.addDeserializer(QueryResponse.class, new QueryResponseDeserializer());

		mapper.registerModule(simpleModule);

		return mapper.treeToValue(jsonNode, QueryResponse.class);
	}
}