[Polycasso-commit] SF.net SVN: polycasso:[52] trunk/polycasso/src/com/mebigfatguy/polycasso/ RandomImageFinder.java

[<dbr...@us...>]

Revision: 52
          http://polycasso.svn.sourceforge.net/polycasso/?rev=52&view=rev
Author:   dbrosius
Date:     2009-11-25 05:56:12 +0000 (Wed, 25 Nov 2009)

Log Message:
-----------
attempt to look for an image 5 times, in case of transient failures

Modified Paths:
--------------
    trunk/polycasso/src/com/mebigfatguy/polycasso/RandomImageFinder.java

Modified: trunk/polycasso/src/com/mebigfatguy/polycasso/RandomImageFinder.java
===================================================================
--- trunk/polycasso/src/com/mebigfatguy/polycasso/RandomImageFinder.java	2009-11-25 05:42:04 UTC (rev 51)
+++ trunk/polycasso/src/com/mebigfatguy/polycasso/RandomImageFinder.java	2009-11-25 05:56:12 UTC (rev 52)
@@ -47,6 +47,7 @@
 	private static final Pattern IMAGE_HTML_PATTERN = Pattern.compile("<div\\s+class=\"imageResult\"><a\\s+href=\"([^\"]*)\"");
 	private static final Pattern IMAGE_PATTERN = Pattern.compile("image_url=([^&]*)&amp;");
 	private static final int NAMELEN = 3;
+	private static final int ATTEMPTS = 5;
 	
 	/**
 	 * private to avoid construction of this static access only class
@@ -63,14 +64,33 @@
 	 */
 	public static Image findImage() throws IOException {
 
-		char[] ranName = new char[NAMELEN];
-		Random ran = new Random(System.currentTimeMillis());
-		for (int i = 0; i < NAMELEN; i++) {
-			ranName[i] = (char)('A' + ran.nextInt(26));
+		for (int i = 0; i < ATTEMPTS; i++) {
+			try {
+				char[] ranName = new char[NAMELEN];
+				Random ran = new Random(System.currentTimeMillis());
+				for (int c = 0; c < NAMELEN; c++) {
+					ranName[c] = (char)('A' + ran.nextInt(26));
+				}
+				
+				return findImageAt(MessageFormat.format(URL, new String(ranName)));
+			} catch (IOException ioe) {
+			}
 		}
 		
-		String html = new String(getUrlData(MessageFormat.format(URL, new String(ranName))), "UTF-8");
+		throw new IOException("Failed to find an inspiration to draw");
+	}
+	
+	/**
+	 * retrieve an image thru lycos image search
+	 * 
+	 * @param url the url to look for the image
+	 * @return the image
+	 * @throws IOException if the site that is hosting the image is down, or non responsive
+	 */
+	private static final Image findImageAt(String url) throws IOException {
 		
+		String html = new String(getUrlData(url), "UTF-8");
+		
 		List<String> images = new ArrayList<String>();
 		
 		Matcher m = IMAGE_HTML_PATTERN.matcher(html);
@@ -82,9 +102,9 @@
 		
 		m = IMAGE_PATTERN.matcher(html);
 		if (m.find()) {
-			String url = URLDecoder.decode(m.group(1), "UTF-8");
+			String imageUrl = URLDecoder.decode(m.group(1), "UTF-8");
 			
-			return new ImageIcon(getUrlData(url)).getImage();
+			return new ImageIcon(getUrlData(imageUrl)).getImage();
 		}
 
 		throw new IOException("Failed to find image");


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