com.binance.api.client.domain.event.CandlestickEventDeserializer Maven / Gradle / Ivy

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package com.binance.api.client.domain.event;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.ObjectCodec;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonNode;

import java.io.IOException;

/**
 * Custom deserializer for a candlestick stream event, since the structure of the candlestick json differ from the one in the REST API.
 *
 * @see CandlestickEvent
 */
public class CandlestickEventDeserializer extends JsonDeserializer {

  @Override
  public CandlestickEvent deserialize(JsonParser jp, DeserializationContext ctx) throws IOException {
    ObjectCodec oc = jp.getCodec();
    JsonNode node = oc.readTree(jp);

    CandlestickEvent candlestickEvent = new CandlestickEvent();

    // Parse header
    candlestickEvent.setEventType(node.get("e").asText());
    candlestickEvent.setEventTime(node.get("E").asLong());
    candlestickEvent.setSymbol(node.get("s").asText());

    // Parse candlestick data
    JsonNode candlestickNode = node.get("k");
    candlestickEvent.setOpenTime(candlestickNode.get("t").asLong());
    candlestickEvent.setCloseTime(candlestickNode.get("T").asLong());
    candlestickEvent.setIntervalId(candlestickNode.get("i").asText());
    candlestickEvent.setFirstTradeId(candlestickNode.get("f").asLong());
    candlestickEvent.setLastTradeId(candlestickNode.get("L").asLong());
    candlestickEvent.setOpen(candlestickNode.get("o").asText());
    candlestickEvent.setClose(candlestickNode.get("c").asText());
    candlestickEvent.setHigh(candlestickNode.get("h").asText());
    candlestickEvent.setLow(candlestickNode.get("l").asText());
    candlestickEvent.setVolume(candlestickNode.get("v").asText());
    candlestickEvent.setNumberOfTrades(candlestickNode.get("n").asLong());
    candlestickEvent.setBarFinal(candlestickNode.get("x").asBoolean());
    candlestickEvent.setQuoteAssetVolume(candlestickNode.get("q").asText());
    candlestickEvent.setTakerBuyBaseAssetVolume(candlestickNode.get("V").asText());
    candlestickEvent.setTakerBuyQuoteAssetVolume(candlestickNode.get("Q").asText());

    return candlestickEvent;
  }
}