package mobi.boilr.libdynticker.exchanges; import java.io.IOException; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import org.codehaus.jackson.JsonNode; import mobi.boilr.libdynticker.core.Exchange; import mobi.boilr.libdynticker.core.Pair; import mobi.boilr.libdynticker.core.exception.NoMarketDataException; public final class PoloniexExchange extends Exchange { private static final String API_URL = "https://poloniex.com/public?command=returnTicker"; public PoloniexExchange(long expiredPeriod) { super("Poloniex", expiredPeriod); } @Override protected List<Pair> getPairsFromAPI() throws IOException { List<Pair> pairs = new ArrayList<Pair>(); Iterator<String> elements = readJsonFromUrl(API_URL).getFieldNames(); for(String[] split; elements.hasNext();) { split = elements.next().split("_"); pairs.add(new Pair(split[1], split[0])); } return pairs; } @Override protected String getTicker(Pair pair) throws IOException { JsonNode node = readJsonFromUrl(API_URL); if(node.has(pair.getExchange() + "_" + pair.getCoin())) { return parseTicker(node, pair); } else { throw new NoMarketDataException(pair); } } @Override public String parseTicker(JsonNode node, Pair pair) throws IOException { return node.get(pair.getExchange() + "_" + pair.getCoin()).get("last").asText(); } }