Java tutorial
/* * Copyright (c) 2014. This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License for Helena Local Inc. All rights reseved. */ package org.montanafoodhub.base.get; import android.content.Context; import android.text.TextUtils; import android.util.Log; import org.apache.http.HttpResponse; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import org.montanafoodhub.base.Buyer; import org.montanafoodhub.base.Hub; import org.montanafoodhub.base.HubInit; import java.io.*; import java.net.UnknownHostException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.HashMap; import java.util.Iterator; /** * Created by abbie on 1/24/14. */ public class BuyerHub extends Hub implements Runnable { private static boolean isFirstLoad = true; private static Context context; private static Calendar lastRefreshTS; private String fileName = "HL-BuyerHub.csv"; public BuyerHub(Context context) { this.context = context; } private void parseCSV(HashMap<String, Buyer> myBuyerMap, InputStream inputStream) throws IOException { InputStreamReader inputStreamReader = new InputStreamReader(inputStream); BufferedReader bufferedReader = new BufferedReader(inputStreamReader); TextUtils.SimpleStringSplitter simpleStringSplitter = new TextUtils.SimpleStringSplitter(','); String receiveString = ""; boolean firstTime = true; while ((receiveString = bufferedReader.readLine()) != null) { if (firstTime) { // remove header firstTime = false; } else { // build item Buyer buyer = new Buyer(); simpleStringSplitter.setString(receiveString); Iterator<String> iterator = simpleStringSplitter.iterator(); // BID (Buyer ID) Name ContactEmail Hours Phone WebsiteUrl PhotoUrl Location Service Level (0-off, 1-on, 2-premium) Certification ID List if (iterator.hasNext()) { String buyerId = iterator.next(); if (!buyerId.equals("")) { buyer.setBID(buyerId); } } if (iterator.hasNext()) { String name = iterator.next(); if (!name.equals("")) { buyer.setName(name); } } if (iterator.hasNext()) { String contactEmail = iterator.next(); if (!contactEmail.equals("")) { buyer.setContactEmail(contactEmail); } } if (iterator.hasNext()) { String hours = iterator.next(); if (!hours.equals("")) { buyer.setHours(hours); } } if (iterator.hasNext()) { String phone = iterator.next(); if (!phone.equals("")) { buyer.setPhone(phone); } } if (iterator.hasNext()) { String websiteUrl = iterator.next(); if (!websiteUrl.equals("")) { buyer.setWebsiteUrl(websiteUrl); } } if (iterator.hasNext()) { String photoUrl = iterator.next(); if (!photoUrl.equals("")) { buyer.setPhotoUrl(photoUrl); } } if (iterator.hasNext()) { String iconUrl = iterator.next(); if (!iconUrl.equals("")) { buyer.setIconUrl(iconUrl); } } if (iterator.hasNext()) { String location = iterator.next(); if (!location.equals("")) { buyer.setLocation(location); } } if (iterator.hasNext()) { String locationDisplay = iterator.next(); if (!locationDisplay.equals("")) { buyer.setLocationDisplay(locationDisplay); } } if (iterator.hasNext()) { String certificationStr = iterator.next(); if (!certificationStr.equals("")) { buyer.setCertifications(CertificationHub.buildCertificationList(certificationStr)); } } if (iterator.hasNext()) { String quote = iterator.next(); if (!quote.equals("")) { buyer.setQuote(quote); } } if (iterator.hasNext()) { String buyerType = iterator.next(); if (!buyerType.equals("")) { try { // this should help validate the csv file format we are reading. buyer.setBuyerType(Integer.valueOf(buyerType.trim())); ; } catch (Exception e) { Log.e(HubInit.logTag, "SKIPPING - ERROR in csv buyer tab this line: >" + receiveString + "<"); } } } myBuyerMap.put(buyer.getBID(), buyer); } } } protected HashMap<String, Buyer> readFromFile(Context context) { HashMap<String, Buyer> myBuyerMap = new HashMap<String, Buyer>(); try { // getItem the time the file was last changed here File myFile = new File(context.getFilesDir() + "/" + fileName); SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss"); String lastRefreshTSStr = sdf.format(myFile.lastModified()); Log.w(HubInit.logTag, "Using file (" + fileName + ") last modified on : " + lastRefreshTSStr); lastRefreshTS = sdf.getCalendar(); // create products from the file here InputStream inputStream = context.openFileInput(fileName); if (inputStream != null) { parseCSV(myBuyerMap, inputStream); } inputStream.close(); } catch (FileNotFoundException e) { Log.e(HubInit.logTag, "File (" + fileName + ") not found: " + e.toString()); } catch (IOException e) { Log.e(HubInit.logTag, "Can not read file (" + fileName + ") : " + e.toString()); } Log.w(HubInit.logTag, "Number of buyers loaded: " + myBuyerMap.size()); return myBuyerMap; } public HashMap<String, Buyer> getBuyerMap() throws IOException { HashMap<String, Buyer> out = new HashMap<String, Buyer>(); try { if (isFirstLoad) { // try to load disk file first. out = readFromFile(context); } else { out = loadFromServer(context); } } catch (IOException ie) { Log.w(logTag, "BuyerHub().getBuyerMap couldn't be loaded..."); } finally { isFirstLoad = false; } return out; } protected HashMap<String, Buyer> loadFromServer(Context context) throws IOException { HttpClient client = new DefaultHttpClient(); HttpGet request = new HttpGet(buyerHubDataUrl); try { // first try the net HttpResponse response = client.execute(request); Log.w(HubInit.logTag, "HTTP execute Response.getStatusLine() = " + response.getStatusLine()); // make net version local BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent())); writeToFile(context, rd, fileName); Log.w(HubInit.logTag, "Wrote file from the net to device..."); } catch (UnknownHostException e) { Log.w(HubInit.logTag, "Couldn't getItem the file from the net just using file from device... "); } // regardless of net work with file return readFromFile(context); } public static Calendar getLastRefreshTS() { return lastRefreshTS; } // This is used as one component in determining restaurant rank/sort order in the display list public static int getOrderItemCnt(String bid) { int out = 0; for (int j = 0; j < Hub.orderArr.size(); j++) { if (Hub.orderArr.get(j).getBuyerID().equalsIgnoreCase(bid)) { out++; } } return out; } @Override public void run() { try { Hub.buyerMap = new BuyerHub(context).getBuyerMap(); broadcastRefresh(context, HubType.BUYER_HUB); Log.w(logTag, "BuyerHub().getBuyerMap loaded..."); } catch (IOException e) { Log.w(logTag, "BuyerHub().getBuyerMap couldn't be loaded..."); } } @Override public void refresh() { try { Hub.buyerMap = loadFromServer(context); broadcastRefresh(context, HubType.BUYER_HUB); Log.w(logTag, "BuyerHub().refresh loaded..."); } catch (IOException e) { Log.w(logTag, "BuyerHub().refresh couldn't be loaded..."); } } }