asdfasdf
6 years ago
parent
7c48f55481
commit
e997c9d00d
@ -0,0 +1,34 @@
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package network;
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import data.StypeMap;
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import java.io.IOException;
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import javax.json.JsonObject;
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import data.DataSource;
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import network.exceptions.*;
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public class AlphaVantage extends DataSource {
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public AlphaVantage() {
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super("AlphaVantage", "https://www.alphavantage.co/query", "4MC2LL0HOQ2TFQL1");
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}
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@Override
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public double[] update(String stype, String idstring) {
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double[] result = {0.0, 0.0};
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try {
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String urlString = Net.urlStringBuilder(url,
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"function", "GLOBAL_QUOTE",
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"symbol", idstring,
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"apikey", apiKey);
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JsonObject response = StockJson.urlToJson(urlString);
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JsonObject mainJson = StockJson.jsonInJson(response, "Global Quote");
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result[0] = Double.parseDouble(StockJson.stringGetter(mainJson, "05. price"));
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result[1] = StockJson.doublePercent(mainJson, "10. change percent");
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} catch (ParaMismatchException e) {
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e.printStackTrace();
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} catch (IOException e) {
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System.out.println("Error getting data from: " + name);
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e.printStackTrace();
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}
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return result;
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}
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}
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@ -0,0 +1,41 @@
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package network;
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import java.io.InputStream;
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import java.net.URL;
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import java.net.URLConnection;
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import java.net.URLEncoder;
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import java.io.IOException;
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import java.io.UnsupportedEncodingException;
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import network.exceptions.*;
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//Ref: https://stackoverflow.com/questions/2793150/how-to-use-java-net-urlconnection-to-fire-and-handle-http-requests
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public class Net {
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public static String urlStringBuilder(String url, String... paras) throws ParaMismatchException {
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String urlString = url;
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String charset = "UTF-8";
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if ((paras.length % 2) != 0) {
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throw new ParaMismatchException("Except even paras, but have " + paras.length);
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}
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if (paras.length != 0) {
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urlString += "?";
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try {
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for (int i = 0; i < paras.length - 3; i = i + 2) {
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urlString += paras[i] + "=" + URLEncoder.encode(paras[i + 1], charset) + "&";
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}
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urlString += paras[paras.length - 2] + "=" + URLEncoder.encode(paras[paras.length - 1], charset);
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} catch (UnsupportedEncodingException e) {
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System.out.println("Error during encoding url: Unsupported encoding");
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e.printStackTrace();
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}
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}
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return urlString;
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}
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public static InputStream urlToInputStream(String url) throws IOException {
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try {
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return (new URL(url).openStream());
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} catch (IOException e) {
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throw e;
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}
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}
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}
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@ -0,0 +1,43 @@
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package network;
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import javax.json.Json;
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import javax.json.JsonObject;
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import javax.json.JsonReader;
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import javax.json.JsonNumber;
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import java.io.InputStream;
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import java.io.IOException;
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//Json library from https://docs.oracle.com/javaee/7/api/javax/json/Json.html
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public class StockJson {
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public static JsonObject inputStreamToJson(InputStream istream) {
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JsonReader jreader = Json.createReader(istream);
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JsonObject jobj = jreader.readObject();
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jreader.close();
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return jobj;
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}
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public static JsonObject urlToJson(String url) throws IOException {
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try {
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return inputStreamToJson(Net.urlToInputStream(url));
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} catch (IOException e) {
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throw e;
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}
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}
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public static double doubleGetter(JsonObject jobj, String name) {
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return jobj.getJsonNumber(name).doubleValue();
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}
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public static JsonObject jsonInJson(JsonObject jobj, String name) {
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return jobj.getJsonObject(name);
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}
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public static String stringGetter(JsonObject jobj, String name) {
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return jobj.getString(name);
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}
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public static double doublePercent(JsonObject jobj, String name) {
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String temp = stringGetter(jobj, name);
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return Double.parseDouble(temp.split("%")[0]);
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}
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}
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@ -0,0 +1,24 @@
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package observer;
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import java.util.List;
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import java.util.ArrayList;
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import java.util.Collections;
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public abstract class Subject {
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protected ArrayList<Wobserver> obsList = new ArrayList<Wobserver>();
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public void addObs(Wobserver obs) {
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obsList.add(obs);
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}
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public void delObs(Wobserver obs) {
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//Collections.singleton from https://howtodoinjava.com/java/collections/arraylist/arraylist-removeall/
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obsList.removeAll(Collections.singleton(obs));
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}
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public void sendMsg() {
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for (Wobserver obs : obsList) {
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obs.update(this);
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}
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}
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}
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@ -0,0 +1,8 @@
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package observer;
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import java.util.List;
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import data.WatchList;
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public interface Wobserver {
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public void update(Subject obsed);
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}
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