org.continuity.api.entities.deserialization.CustomMapDeserializer Maven / Gradle / Ivy

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package org.continuity.api.entities.deserialization;

import java.io.IOException;
import java.util.AbstractMap.SimpleEntry;
import java.util.Map;
import java.util.stream.Collectors;
import java.util.stream.StreamSupport;


import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import com.fasterxml.jackson.databind.node.ArrayNode;

public class CustomMapDeserializer extends StdDeserializer> {

	/**
	 * Serialization VersionUID
	 */
	private static final long serialVersionUID = 1L;

	public CustomMapDeserializer() {
		this(null);
	}

	public CustomMapDeserializer(Class vc) {
		super(vc);
	}

	@Override
	public Map deserialize(JsonParser jp, DeserializationContext ctxt)
			throws IOException, JsonProcessingException {
		JsonNode node = jp.getCodec().readTree(jp);
		if(node.isArray()) {
			ArrayNode arrayNode = (ArrayNode) node;
			return StreamSupport.stream(arrayNode.spliterator(), false).map(e ->new SimpleEntry(e.textValue(), "undefined")).collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
		}
		ObjectMapper mapper = new ObjectMapper();
		return mapper.readValue(node.toString(), new TypeReference>() {
		});
	}
}