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src/de/relaunch64/popelganda/CheckForUpdates.java

@@ -32,114 +32,141 @@
  */
 package de.relaunch64.popelganda;
 
-import de.relaunch64.popelganda.util.ConstantsR64;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URL;
 import java.util.logging.Level;
 
+import de.relaunch64.popelganda.util.ConstantsR64;
+
 /**
  *
  * @author Daniel Lüdecke
  */
-public class CheckForUpdates extends org.jdesktop.application.Task<Object, Void> {
+public class CheckForUpdates
+	extends org.jdesktop.application.Task<Object, Void>
+{
 
-    // indicates whether the zettelkasten has updates or not.
+	// indicates whether the zettelkasten has updates or not.
 
-    boolean updateavailable = false;
-    String updateBuildNr = null;
+	boolean updateavailable = false;
+	String updateBuildNr = null;
 
-    CheckForUpdates(org.jdesktop.application.Application app) {
-        // Runs on the EDT.  Copy GUI state that
-        // doInBackground() depends on from parameters
-        // to ImportFileTask fields, here.
-        super(app);
-    }
+	CheckForUpdates(org.jdesktop.application.Application app)
+	{
+		// Runs on the EDT. Copy GUI state that
+		// doInBackground() depends on from parameters
+		// to ImportFileTask fields, here.
+		super(app);
+	}
 
-    /**
-     * Opens and reads the file {@code updatetext} to get information about the
-     * latest releases.
-     *
-     * @param updatetext an URL to the (text-)file containg the update
-     * information. See ConstantsR64.UPDATE_INFO_URI.
-     *
-     * @return the content of the (text-)file
-     */
-    protected String accessUpdateFile(URL updatetext) {
-        // input stream that will read the update text
-        InputStream is = null;
-        // stringbuilder that will contain the content of the update-file
-        StringBuilder updateinfo = new StringBuilder("");
-        try {
-            // open update-file on server
-            is = updatetext.openStream();
-            // buffer for stream
-            int buff = 0;
-            // read update-file and copy content to string builder
-            while (buff != -1) {
-                buff = is.read();
-                if (buff != -1) {
-                    updateinfo.append((char) buff);
-                }
-            }
-        } catch (IOException e) {
-            // tell about fail
-            ConstantsR64.r64logger.log(Level.INFO, "No access to Relaunch64-Website. Automatic update-check failed.");
-            updateavailable = false;
-            return null;
-        } finally {
-            try {
-                if (is != null) {
-                    is.close();
-                }
-            } catch (IOException e) {
-            }
-        }
-        return updateinfo.toString()
-                .replace("\n", "")
-                .replace("\r", "")
-                .trim();
-    }
+	/**
+	 * Opens and reads the file {@code updatetext} to get information about the
+	 * latest releases.
+	 *
+	 * @param updatetext
+	 *            an URL to the (text-)file containg the update information. See
+	 *            ConstantsR64.UPDATE_INFO_URI.
+	 *
+	 * @return the content of the (text-)file
+	 */
+	protected String accessUpdateFile(URL updatetext)
+	{
+		// input stream that will read the update text
+		InputStream is = null;
+		// stringbuilder that will contain the content of the update-file
+		StringBuilder updateinfo = new StringBuilder("");
+		try
+		{
+			// open update-file on server
+			is = updatetext.openStream();
+			// buffer for stream
+			int buff = 0;
+			// read update-file and copy content to string builder
+			while (buff != -1)
+			{
+				buff = is.read();
+				if (buff != -1)
+				{
+					updateinfo.append((char) buff);
+				}
+			}
+		}
+		catch (IOException e)
+		{
+			// tell about fail
+			ConstantsR64.r64logger.log(Level.INFO,
+					"No access to Relaunch64-Website. Automatic update-check failed.");
+			updateavailable = false;
+			return null;
+		}
+		finally
+		{
+			try
+			{
+				if (is != null)
+				{
+					is.close();
+				}
+			}
+			catch (IOException e)
+			{
+			}
+		}
+		return updateinfo.toString().replace("\n", "").replace("\r", "").trim();
+	}
 
-    /**
-     * This thread accesses the update information file and checks whether new
-     * releases are available. f yes, an information will be shown in the log
-     * window.
-     *
-     * @return always {@code null}.
-     * @throws IOException
-     */
-    @Override
-    protected Object doInBackground() throws IOException {
-        // Your Task's code here.  This method runs
-        // on a background thread, so don't reference
-        // the Swing GUI from here.
-        updateBuildNr = accessUpdateFile(new URL(ConstantsR64.UPDATE_INFO_URI));
-        // check for valid access
-        if (null == updateBuildNr || updateBuildNr.isEmpty()) {
-            return null;
-        }
-        // check whether there's a newer version online
-        updateavailable = (ConstantsR64.BUILD_NUMBER.compareTo(updateBuildNr) < 0);
-        return null;  // return your result
-    }
+	/**
+	 * This thread accesses the update information file and checks whether new
+	 * releases are available. f yes, an information will be shown in the log
+	 * window.
+	 *
+	 * @return always {@code null}.
+	 * @throws IOException
+	 */
+	@Override
+	protected Object doInBackground() throws IOException
+	{
+		// Your Task's code here. This method runs
+		// on a background thread, so don't reference
+		// the Swing GUI from here.
+		updateBuildNr = accessUpdateFile(new URL(ConstantsR64.UPDATE_INFO_URI));
+		// check for valid access
+		if (null == updateBuildNr || updateBuildNr.isEmpty())
+		{
+			return null;
+		}
+		// check whether there's a newer version online
+		updateavailable = (ConstantsR64.BUILD_NUMBER.compareTo(updateBuildNr) < 0);
+		return null; // return your result
+	}
 
-    @Override
-    protected void succeeded(Object result) {
-        // Runs on the EDT.  Update the GUI based on
-        // the result computed by doInBackground().
-    }
+	@Override
+	protected void succeeded(Object result)
+	{
+		// Runs on the EDT. Update the GUI based on
+		// the result computed by doInBackground().
+	}
 
-    @Override
-    protected void finished() {
-        if (updateavailable) {
-            //log info
-            ConstantsR64.r64logger.log(Level.INFO, ("A new version of Relaunch64 is available!" + System.lineSeparator() + "Download from " + ConstantsR64.UPDATE_URI));
-        } else {
-            // log latest available build
-            if (updateBuildNr != null) {
-                ConstantsR64.r64logger.log(Level.INFO, ("Latest stable Relaunch64-build: " + updateBuildNr));
-            }
-        }
-    }
+	@Override
+	protected void finished()
+	{
+		if (updateavailable)
+		{
+			// log info
+			ConstantsR64.r64logger.log(Level.INFO,
+					("A new version of Relaunch64 is available!"
+							+ System.lineSeparator() + "Download from "
+							+ ConstantsR64.UPDATE_URI));
+		}
+		else
+		{
+			// log latest available build
+			if (updateBuildNr != null)
+			{
+				ConstantsR64.r64logger.log(Level.INFO,
+						("Latest stable Relaunch64-build: " + updateBuildNr));
+			}
+		}
+	}
 }