created a file filter for the jfile chooser for CSV files

Order Processor/src/com/TwentyCodes/java/OrderProcessor/FileFilter.java

@@ -0,0 +1,77 @@
+/**
+ * FileFilter.java
+ * @date Jan 7, 2011
+ * @author ricky barrette
+ * @author Twenty Codes, LLC
+ */
+package com.TwentyCodes.java.OrderProcessor;
+
+import java.io.File;
+
+/**
+ * A file filter for the JFilechooser
+ * @author ricky barrette
+ */
+public class FileFilter extends javax.swing.filechooser.FileFilter {
+
+	public final static String csv = "csv";
+	
+	/**
+	 * Creates a new FileFilter
+	 * @author ricky barrette
+	 */
+	public FileFilter() {
+		// TODO Auto-generated constructor stub
+	}
+
+	/**
+	 * (non-Javadoc)
+	 * @see javax.swing.filechooser.FileFilter#accept(java.io.File)
+	 * @author ricky barrette
+	 */
+	@Override
+	public boolean accept(File f) {
+		if (f.isDirectory()) {
+			return true;
+		}
+
+		String extension = getExtension(f);
+		if (extension != null) {
+			if (extension.equals(csv)) {
+				return true;
+			} else {
+				return false;
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	 * (non-Javadoc)
+	 * @see javax.swing.filechooser.FileFilter#getDescription()
+	 * @author ricky barrette
+	 */
+	@Override
+	public String getDescription() {
+		return "Google Checkout CSV files";
+	}
+
+    /**
+     * Get the extension of a file
+     * @param f file
+     * @return file's extension
+     * @author ricky barrette
+     */
+    private String getExtension(File f) {
+        String ext = null;
+        String s = f.getName();
+        int i = s.lastIndexOf('.');
+
+        if (i > 0 &&  i < s.length() - 1) {
+            ext = s.substring(i+1).toLowerCase();
+        }
+        return ext;
+    }
+
+}

Order Processor/src/com/TwentyCodes/java/OrderProcessor/UI/MainWindow.java

@@ -21,6 +21,7 @@ import javax.swing.JFrame;
 import javax.swing.JPanel;
 import javax.swing.JProgressBar;
 
+import com.TwentyCodes.java.OrderProcessor.FileFilter;
 import com.TwentyCodes.java.OrderProcessor.OrderDB;
 import com.TwentyCodes.java.OrderProcessor.ProgressListener;
 import com.TwentyCodes.java.OrderProcessor.UncaughtExceptionHandler;
@@ -57,11 +58,11 @@ public class MainWindow extends JFrame implements ActionListener, ProgressListen
 		mSearchButton = new JButton("Search");
 		
 		mSearchButton.addActionListener(this);
-		panel.add(mSearchButton, "cell 0 0,grow");
-		panel.add(mShowAllButton, "cell 0 0,alignx left,aligny top");
+		panel.add(mSearchButton);
+		panel.add(mShowAllButton);
 		mLoadFileButton = new JButton("Load File");
 		mLoadFileButton.addActionListener(this);
-		panel.add(mLoadFileButton, "cell 0 0,alignx left,aligny top");
+		panel.add(mLoadFileButton);
 		
 		mProgressBar = new JProgressBar();
 		getContentPane().add(mProgressBar, BorderLayout.SOUTH);
@@ -70,7 +71,7 @@ public class MainWindow extends JFrame implements ActionListener, ProgressListen
         
         db = new OrderDB();
         fc = new JFileChooser();
-        fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
+        fc.setFileFilter(new FileFilter());
         
         db.setOnProgressListerner(this);
 	}