Parse repository xml to get needed sdk download URLs

Author: imilka

src/processing/mode/android/SDKDownloader.java

@@ -1,14 +1,130 @@
 package processing.mode.android;
 
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+import org.xml.sax.SAXException;
+import processing.app.Base;
 import processing.app.Preferences;
 
 import javax.swing.*;
 import javax.swing.border.EmptyBorder;
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
 import java.awt.*;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.beans.PropertyChangeEvent;
+import java.beans.PropertyChangeListener;
+import java.io.IOException;
+import java.net.URL;
 
-public class SDKDownloader extends JFrame {
+public class SDKDownloader extends JFrame implements PropertyChangeListener {
+
+  private static final String URL_SDK_TOOLS_WINDOWS = "http://dl.google.com/android/android-sdk_r23-windows.zip";
+  private static final String URL_SDK_TOOLS_MACOS = "http://dl.google.com/android/android-sdk_r23-macosx.zip";
+  private static final String URL_SDK_TOOLS_LINUX = "http://dl.google.com/android/android-sdk_r23-linux.tgz";
+
+  private static final String URL_REPOSITORY = "https://dl-ssl.google.com/android/repository/repository-10.xml";
+  private static final String URL_REPOSITORY_FOLDER = "http://dl-ssl.google.com/android/repository/";
+
+  private static final String PLATFORM_API_LEVEL = "10";
+
+  class SDKUrlHolder {
+    public String platformToolsUrl, buildToolsUrl, platformUrl;
+  }
+
+  class SDKDownloadTask extends SwingWorker {
+
+    @Override
+    protected Object doInBackground() throws Exception {
+      String hostOs = getOsString();
+      try {
+        SDKUrlHolder downloadUrls = getDownloadUrls(URL_REPOSITORY, hostOs);
+      } catch (ParserConfigurationException e) {
+        // TODO Handle exceptions here somehow (ie show error message)
+        e.printStackTrace();
+      } catch (IOException e) {
+        e.printStackTrace();
+      } catch (SAXException e) {
+        e.printStackTrace();
+      }
+      return null;
+    }
+
+    @Override
+    protected void done() {
+      super.done();
+    }
+
+    private String getOsString() {
+      if(Base.isWindows()) {
+        return "windows";
+      } else if(Base.isLinux()) {
+        return "linux";
+      } else {
+        return "macosx";
+      }
+    }
+
+    private SDKUrlHolder getDownloadUrls(String repositoryUrl, String requiredHostOs) throws ParserConfigurationException, IOException, SAXException {
+      SDKUrlHolder urlHolder = new SDKUrlHolder();
+
+      DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
+      DocumentBuilder db = dbf.newDocumentBuilder();
+      Document doc = db.parse(new URL(repositoryUrl).openStream());
+
+      // platform
+      NodeList platformList = doc.getElementsByTagName("sdk:platform");
+      for(int i = 0; i < platformList.getLength(); i++) {
+        Node platform = platformList.item(i);
+        if(((Element) platform).getElementsByTagName("sdk:api-level").item(0).getTextContent().equals(PLATFORM_API_LEVEL)) {
+          Node archiveListItem = ((Element) platform).getElementsByTagName("sdk:archives").item(0);
+          Node archiveItem = ((Element) archiveListItem).getElementsByTagName("sdk:archive").item(0);
+          urlHolder.platformUrl = ((Element) archiveItem).getElementsByTagName("sdk:url").item(0).getTextContent();
+        }
+      }
+
+      // platform-tools
+      Node platformToolItem = doc.getElementsByTagName("sdk:platform-tool").item(0);
+      Node archiveListItem = ((Element) platformToolItem).getElementsByTagName("sdk:archives").item(0);
+      NodeList archiveList = ((Element) archiveListItem).getElementsByTagName("sdk:archive");
+      for(int i = 0; i < archiveList.getLength(); i++) {
+        Node archive = archiveList.item(i);
+        String hostOs = ((Element) archive).getElementsByTagName("sdk:host-os").item(0).getTextContent();
+        if(hostOs.equals(requiredHostOs)) {
+          String platformToolsUrl = (((Element) archive).getElementsByTagName("sdk:url").item(0).getTextContent());
+          if(!platformToolsUrl.startsWith("http")) platformToolsUrl = URL_REPOSITORY_FOLDER + platformToolsUrl;
+          urlHolder.platformToolsUrl = platformToolsUrl;
+          break;
+        }
+      }
+
+      // build-tools
+      Node buildToolsItem = doc.getElementsByTagName("sdk:build-tool").item(doc.getElementsByTagName("sdk:build-tool").getLength()-1);
+      archiveListItem = ((Element) buildToolsItem).getElementsByTagName("sdk:archives").item(0);
+      archiveList = ((Element) archiveListItem).getElementsByTagName("sdk:archive");
+      for(int i = 0; i < archiveList.getLength(); i++) {
+        Node archive = archiveList.item(i);
+        String hostOs = ((Element) archive).getElementsByTagName("sdk:host-os").item(0).getTextContent();
+        if(hostOs.equals(requiredHostOs)) {
+          String buildToolsUrl = (((Element) archive).getElementsByTagName("sdk:url").item(0).getTextContent());
+          if(!buildToolsUrl.startsWith("http")) buildToolsUrl = URL_REPOSITORY_FOLDER + buildToolsUrl;
+          urlHolder.buildToolsUrl = buildToolsUrl;
+          break;
+        }
+      }
+
+      return urlHolder;
+    }
+  }
+
+  @Override
+  public void propertyChange(PropertyChangeEvent evt) {
+
+  }
 
   public SDKDownloader() {
     super("Android SDK downloading...");
@@ -17,6 +133,9 @@ public SDKDownloader() {
   }
 
   public void startDownload() {
+    SDKDownloadTask downloadTask = new SDKDownloadTask();
+    downloadTask.addPropertyChangeListener(this);
+    downloadTask.execute();
   }
 
   private void createLayout() {