slf4j-migrator/src/main/java/org/slf4j/migrator/internal/MigratorFrame.java - platform/external/slf4j - Git at Google

 /**
  * Copyright (c) 2004-2011 QOS.ch
  * All rights reserved.
  *
  * Permission is hereby granted, free  of charge, to any person obtaining
  * a  copy  of this  software  and  associated  documentation files  (the
  * "Software"), to  deal in  the Software without  restriction, including
  * without limitation  the rights to  use, copy, modify,  merge, publish,
  * distribute,  sublicense, and/or sell  copies of  the Software,  and to
  * permit persons to whom the Software  is furnished to do so, subject to
  * the following conditions:
  *
  * The  above  copyright  notice  and  this permission  notice  shall  be
  * included in all copies or substantial portions of the Software.
  *
  * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
  * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
  * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  *
  */
 package org.slf4j.migrator.internal;

 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.io.File;
 import java.util.ArrayList;
 import java.util.List;

 import javax.swing.ButtonGroup;
 import javax.swing.JButton;
 import javax.swing.JCheckBox;
 import javax.swing.JFileChooser;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
 import javax.swing.JOptionPane;
 import javax.swing.JProgressBar;
 import javax.swing.JRadioButton;
 import javax.swing.JTextField;
 import javax.swing.SpringLayout;
 import javax.swing.WindowConstants;

 import org.slf4j.migrator.Constant;
 import org.slf4j.migrator.helper.SpringLayoutHelper;

 public class MigratorFrame extends JFrame implements ActionListener {
     private static final long serialVersionUID = 1L;

     private static final int BASIC_PADDING = 10;
     private static final int FOLDER_COLUMNS = 40;
     private static final String MIGRATE_COMMAND = "MIGRATE_COMMAND";
     private static final String BROWSE_COMMAND = "BROWSE_COMMAND";
     static final String EXIT_COMMAND = "EXIT_COMMAND";

     static final int X_SIZE = 700;
     static final int Y_SIZE = 400;

     private final SpringLayout layoutManager = new SpringLayout();
     private final SpringLayoutHelper slh = new SpringLayoutHelper(layoutManager, BASIC_PADDING);

     private JLabel migrationLabel;

     private JRadioButton radioLog4j;
     private JRadioButton radioJCL;
     private JRadioButton radioJUL;
     private ButtonGroup buttonGroup;

     private JTextField folderTextField;
     private JLabel warningLabel;
     JButton migrateButton;
     private JButton browseButton;
     private JLabel folderLabel;

     private JCheckBox awareCheckBox;
     private JLabel awareLabel;

     JLabel otherLabel;
     JProgressBar progressBar;
     private JFileChooser fileChooser;

     public MigratorFrame() {
         super();
         initGUI();
     }

     private void initGUI() {
         try {
             setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
             getContentPane().setLayout(layoutManager);
             this.setTitle("SLF4J migrator");

             createComponents();
             constrainAll();
             addAllComponentsToContextPane();
             pack();
             this.setSize(700, 400);
         } catch (Exception e) {
             e.printStackTrace();
         }
     }

     private void createComponents() {
         createMigrationLabel();
         createRadioJCL();
         createRadioLog4j();
         createRadioJUL();
         createButtonGroup();
         createFolderLabel();
         createFolderTextField();
         createBrowseButton();
         createMigrateButton();
         createAwareCheckbox();
         createAwareLabel();
         createWarningLabel();
         createFileChooser();

         otherLabel = new JLabel();
         otherLabel.setText("");
         createProgressBar();

     }

     /**
      *
      */
     private void constrainAll() {

         // constraints migration label
         layoutManager.putConstraint(SpringLayout.WEST, migrationLabel, BASIC_PADDING, SpringLayout.EAST, this);

         layoutManager.putConstraint(SpringLayout.NORTH, migrationLabel, BASIC_PADDING, SpringLayout.NORTH, this);

         slh.placeToTheRight(migrationLabel, radioJCL, BASIC_PADDING, -BASIC_PADDING / 2);
         slh.placeBelow(radioJCL, radioLog4j, 0, 0);

         slh.placeBelow(radioLog4j, radioJUL, 0, 0);

         slh.placeBelow(migrationLabel, folderLabel, 0, BASIC_PADDING * 6);
         slh.placeToTheRight(folderLabel, folderTextField);
         slh.placeToTheRight(folderTextField, browseButton, BASIC_PADDING, -BASIC_PADDING / 2);

         slh.placeBelow(folderLabel, warningLabel, 0, BASIC_PADDING * 3);

         slh.placeBelow(warningLabel, awareCheckBox, 0, (int) (BASIC_PADDING * 1.5));
         slh.placeToTheRight(awareCheckBox, awareLabel);

         slh.placeBelow(awareCheckBox, migrateButton, 0, BASIC_PADDING * 3);

         slh.placeBelow(migrateButton, otherLabel, 0, BASIC_PADDING * 2);

         slh.placeBelow(otherLabel, progressBar, 0, BASIC_PADDING);
     }

     private void addAllComponentsToContextPane() {
         getContentPane().add(migrationLabel);
         getContentPane().add(radioJCL);
         getContentPane().add(radioLog4j);
         getContentPane().add(radioJUL);

         getContentPane().add(folderLabel);
         getContentPane().add(folderTextField);
         getContentPane().add(browseButton);
         getContentPane().add(migrateButton);

         getContentPane().add(awareCheckBox);
         getContentPane().add(awareLabel);

         getContentPane().add(warningLabel);

         getContentPane().add(otherLabel);
         getContentPane().add(progressBar);
     }

     private void createButtonGroup() {
         buttonGroup = new ButtonGroup();
         buttonGroup.add(radioJCL);
         buttonGroup.add(radioLog4j);
         buttonGroup.add(radioJUL);
     }

     private void createMigrationLabel() {
         migrationLabel = new JLabel();
         migrationLabel.setText("Migration Type");
     }

     private void createRadioJCL() {
         radioJCL = new JRadioButton();
         radioJCL.setText("from Jakarta Commons Logging to SLF4J");
         radioJCL.setToolTipText("Select this button if you wish to migrate a Java project using Jakarta Commons Logging to use SLF4J.");
     }

     private void createRadioLog4j() {
         radioLog4j = new JRadioButton();
         radioLog4j.setText("from log4j to SLF4J ");
         radioLog4j.setToolTipText("Select this button if you wish to migrate a Java project using log4j to use SLF4J.");
     }

     private void createRadioJUL() {
         radioJUL = new JRadioButton();
         radioJUL.setText("from JUL to SLF4J ");
         radioJUL.setToolTipText("Select this button if you wish to migrate a Java project using java.utl.logging (JUL) to use SLF4J.");
     }

     private void createFolderLabel() {
         folderLabel = new JLabel();
         folderLabel.setText("Project Directory");
     }

     private void createFolderTextField() {
         folderTextField = new JTextField();
         folderTextField.setColumns(FOLDER_COLUMNS);
     }

     private void createBrowseButton() {
         browseButton = new JButton();
         browseButton.setText("Browse");
         browseButton.addActionListener(this);
         browseButton.setActionCommand(BROWSE_COMMAND);
         browseButton.setToolTipText("Click this button to browse the file systems on your computer.");
     }

     private void createAwareCheckbox() {
         awareCheckBox = new JCheckBox();
         awareCheckBox.setToolTipText("<html><p>Check this box of you understand that the migration tool<p>will <b>not</b> backup your Java source files.</html>");
     }

     private void createAwareLabel() {
         awareLabel = new JLabel();
         awareLabel.setText("<html>" + "<p>I am aware that this tool will directly modify all Java source files"
                         + "<p>in the selected folder without creating backup files." + "</html>");
     }

     private void createWarningLabel() {
         warningLabel = new JLabel();
         warningLabel.setText("<html>" + "<p><span color=\"red\">WARNING:</span> This SLF4J migration tool will directly modify all Java source files"
                         + "<p>in the selected project folder without creating a backup of the original files." + "</html>");
     }

     private void createMigrateButton() {
         migrateButton = new JButton();
         migrateButton.setText("Migrate Project to SLF4J");
         migrateButton.setToolTipText("Click this button to initiate migration of your project.");
         migrateButton.addActionListener(this);
         migrateButton.setActionCommand(MIGRATE_COMMAND);
     }

     private void createFileChooser() {
         fileChooser = new JFileChooser();
         fileChooser.setDialogTitle("Source folder selector");
         fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
     }

     private void createProgressBar() {
         progressBar = new JProgressBar(0, 1);
         progressBar.setPreferredSize(new java.awt.Dimension((int) (X_SIZE * 0.8), 5));
         progressBar.setVisible(false);
     }

     public void disableInput() {
         radioJCL.setEnabled(false);
         radioLog4j.setEnabled(false);

         browseButton.setEnabled(false);

         folderTextField.setEnabled(false);
         awareCheckBox.setEnabled(false);
         migrateButton.setText("Migration in progress");
         migrateButton.setEnabled(false);

     }

     public void actionPerformed(ActionEvent e) {

         if (MIGRATE_COMMAND.equals(e.getActionCommand())) {

             List<String> errorList = doSanityAnalysis();
             if (errorList.size() > 0) {
                 showDialogBox(errorList);
             } else {

                 File projectFolder = new File(folderTextField.getText());
                 int conversionType;
                 if (radioJCL.isSelected()) {
                     conversionType = Constant.JCL_TO_SLF4J;
                 } else if (radioLog4j.isSelected()) {
                     conversionType = Constant.LOG4J_TO_SLF4J;
                 } else if (radioJUL.isSelected()) {
                     conversionType = Constant.JUL_TO_SLF4J;
                 } else {
                     // we cannot possibly reach here
                     throw new IllegalStateException("One of JCL or log4j project must have been previously chosen.");
                 }
                 ConversionTask task = new ConversionTask(projectFolder, this, conversionType);
                 task.launch();
             }
         } else if (BROWSE_COMMAND.equals(e.getActionCommand())) {
             showFileChooser();
         } else if (EXIT_COMMAND.equals(e.getActionCommand())) {
             this.dispose();
         }
     }

     void showFileChooser() {
         int returnVal = fileChooser.showOpenDialog(this);
         if (returnVal == JFileChooser.APPROVE_OPTION) {
             File selectedFile = fileChooser.getSelectedFile();
             folderTextField.setText(selectedFile.getAbsolutePath());
         }
     }

     List<String> doSanityAnalysis() {

         List<String> errorList = new ArrayList<>();
         if (!radioJCL.isSelected() && !radioLog4j.isSelected() && !radioJUL.isSelected()) {
             errorList.add("Please select the migration type: JCL, log4j, or JUL to SLF4J.");
         }

         String folder = folderTextField.getText();

         if (folder == null || folder.length() == 0) {
             errorList.add("Please select the folder of the project to migrate");
         } else if (!isDirectory(folder)) {
             errorList.add("[" + folder + "] does not look like a valid folder");
         }

         if (!awareCheckBox.isSelected()) {
             errorList.add("Cannot initiate migration unless you acknowledge<p>that files will be modified without creating backup files");
         }
         return errorList;
     }

     void showDialogBox(List<String> errorList) {
         StringBuilder buf = new StringBuilder();
         buf.append("<html>");
         int i = 1;
         for (String msg : errorList) {
             buf.append("<p>");
             buf.append(i);
             buf.append(". ");
             buf.append(msg);
             buf.append("");
             i++;
         }
         buf.append("</html>");

         JOptionPane.showMessageDialog(this, buf.toString(), "", JOptionPane.ERROR_MESSAGE);
     }

     boolean isDirectory(String filename) {
         if (filename == null) {
             return false;
         }
         File file = new File(filename);
         if (file.exists() && file.isDirectory()) {
             return true;
         } else {
             return false;
         }
     }
 }
	/**
	* Copyright (c) 2004-2011 QOS.ch
	* All rights reserved.
	*
	* Permission is hereby granted, free of charge, to any person obtaining
	* a copy of this software and associated documentation files (the
	* "Software"), to deal in the Software without restriction, including
	* without limitation the rights to use, copy, modify, merge, publish,
	* distribute, sublicense, and/or sell copies of the Software, and to
	* permit persons to whom the Software is furnished to do so, subject to
	* the following conditions:
	*
	* The above copyright notice and this permission notice shall be
	* included in all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
	* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
	* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
	* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	*
	*/
	package org.slf4j.migrator.internal;

	import java.awt.event.ActionEvent;
	import java.awt.event.ActionListener;
	import java.io.File;
	import java.util.ArrayList;
	import java.util.List;

	import javax.swing.ButtonGroup;
	import javax.swing.JButton;
	import javax.swing.JCheckBox;
	import javax.swing.JFileChooser;
	import javax.swing.JFrame;
	import javax.swing.JLabel;
	import javax.swing.JOptionPane;
	import javax.swing.JProgressBar;
	import javax.swing.JRadioButton;
	import javax.swing.JTextField;
	import javax.swing.SpringLayout;
	import javax.swing.WindowConstants;

	import org.slf4j.migrator.Constant;
	import org.slf4j.migrator.helper.SpringLayoutHelper;

	public class MigratorFrame extends JFrame implements ActionListener {
	private static final long serialVersionUID = 1L;

	private static final int BASIC_PADDING = 10;
	private static final int FOLDER_COLUMNS = 40;
	private static final String MIGRATE_COMMAND = "MIGRATE_COMMAND";
	private static final String BROWSE_COMMAND = "BROWSE_COMMAND";
	static final String EXIT_COMMAND = "EXIT_COMMAND";

	static final int X_SIZE = 700;
	static final int Y_SIZE = 400;

	private final SpringLayout layoutManager = new SpringLayout();
	private final SpringLayoutHelper slh = new SpringLayoutHelper(layoutManager, BASIC_PADDING);

	private JLabel migrationLabel;

	private JRadioButton radioLog4j;
	private JRadioButton radioJCL;
	private JRadioButton radioJUL;
	private ButtonGroup buttonGroup;

	private JTextField folderTextField;
	private JLabel warningLabel;
	JButton migrateButton;
	private JButton browseButton;
	private JLabel folderLabel;

	private JCheckBox awareCheckBox;
	private JLabel awareLabel;

	JLabel otherLabel;
	JProgressBar progressBar;
	private JFileChooser fileChooser;

	public MigratorFrame() {
	super();
	initGUI();
	}

	private void initGUI() {
	try {
	setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
	getContentPane().setLayout(layoutManager);
	this.setTitle("SLF4J migrator");

	createComponents();
	constrainAll();
	addAllComponentsToContextPane();
	pack();
	this.setSize(700, 400);
	} catch (Exception e) {
	e.printStackTrace();
	}
	}

	private void createComponents() {
	createMigrationLabel();
	createRadioJCL();
	createRadioLog4j();
	createRadioJUL();
	createButtonGroup();
	createFolderLabel();
	createFolderTextField();
	createBrowseButton();
	createMigrateButton();
	createAwareCheckbox();
	createAwareLabel();
	createWarningLabel();
	createFileChooser();

	otherLabel = new JLabel();
	otherLabel.setText("");
	createProgressBar();

	}

	/**
	*
	*/
	private void constrainAll() {

	// constraints migration label
	layoutManager.putConstraint(SpringLayout.WEST, migrationLabel, BASIC_PADDING, SpringLayout.EAST, this);

	layoutManager.putConstraint(SpringLayout.NORTH, migrationLabel, BASIC_PADDING, SpringLayout.NORTH, this);

	slh.placeToTheRight(migrationLabel, radioJCL, BASIC_PADDING, -BASIC_PADDING / 2);
	slh.placeBelow(radioJCL, radioLog4j, 0, 0);

	slh.placeBelow(radioLog4j, radioJUL, 0, 0);

	slh.placeBelow(migrationLabel, folderLabel, 0, BASIC_PADDING * 6);
	slh.placeToTheRight(folderLabel, folderTextField);
	slh.placeToTheRight(folderTextField, browseButton, BASIC_PADDING, -BASIC_PADDING / 2);

	slh.placeBelow(folderLabel, warningLabel, 0, BASIC_PADDING * 3);

	slh.placeBelow(warningLabel, awareCheckBox, 0, (int) (BASIC_PADDING * 1.5));
	slh.placeToTheRight(awareCheckBox, awareLabel);

	slh.placeBelow(awareCheckBox, migrateButton, 0, BASIC_PADDING * 3);

	slh.placeBelow(migrateButton, otherLabel, 0, BASIC_PADDING * 2);

	slh.placeBelow(otherLabel, progressBar, 0, BASIC_PADDING);
	}

	private void addAllComponentsToContextPane() {
	getContentPane().add(migrationLabel);
	getContentPane().add(radioJCL);
	getContentPane().add(radioLog4j);
	getContentPane().add(radioJUL);

	getContentPane().add(folderLabel);
	getContentPane().add(folderTextField);
	getContentPane().add(browseButton);
	getContentPane().add(migrateButton);

	getContentPane().add(awareCheckBox);
	getContentPane().add(awareLabel);

	getContentPane().add(warningLabel);

	getContentPane().add(otherLabel);
	getContentPane().add(progressBar);
	}

	private void createButtonGroup() {
	buttonGroup = new ButtonGroup();
	buttonGroup.add(radioJCL);
	buttonGroup.add(radioLog4j);
	buttonGroup.add(radioJUL);
	}

	private void createMigrationLabel() {
	migrationLabel = new JLabel();
	migrationLabel.setText("Migration Type");
	}

	private void createRadioJCL() {
	radioJCL = new JRadioButton();
	radioJCL.setText("from Jakarta Commons Logging to SLF4J");
	radioJCL.setToolTipText("Select this button if you wish to migrate a Java project using Jakarta Commons Logging to use SLF4J.");
	}

	private void createRadioLog4j() {
	radioLog4j = new JRadioButton();
	radioLog4j.setText("from log4j to SLF4J ");
	radioLog4j.setToolTipText("Select this button if you wish to migrate a Java project using log4j to use SLF4J.");
	}

	private void createRadioJUL() {
	radioJUL = new JRadioButton();
	radioJUL.setText("from JUL to SLF4J ");
	radioJUL.setToolTipText("Select this button if you wish to migrate a Java project using java.utl.logging (JUL) to use SLF4J.");
	}

	private void createFolderLabel() {
	folderLabel = new JLabel();
	folderLabel.setText("Project Directory");
	}

	private void createFolderTextField() {
	folderTextField = new JTextField();
	folderTextField.setColumns(FOLDER_COLUMNS);
	}

	private void createBrowseButton() {
	browseButton = new JButton();
	browseButton.setText("Browse");
	browseButton.addActionListener(this);
	browseButton.setActionCommand(BROWSE_COMMAND);
	browseButton.setToolTipText("Click this button to browse the file systems on your computer.");
	}

	private void createAwareCheckbox() {
	awareCheckBox = new JCheckBox();
	awareCheckBox.setToolTipText("<html><p>Check this box of you understand that the migration tool<p>will <b>not</b> backup your Java source files.</html>");
	}

	private void createAwareLabel() {
	awareLabel = new JLabel();
	awareLabel.setText("<html>" + "<p>I am aware that this tool will directly modify all Java source files"
	+ "<p>in the selected folder without creating backup files." + "</html>");
	}

	private void createWarningLabel() {
	warningLabel = new JLabel();
	warningLabel.setText("<html>" + "<p><span color=\"red\">WARNING:</span> This SLF4J migration tool will directly modify all Java source files"
	+ "<p>in the selected project folder without creating a backup of the original files." + "</html>");
	}

	private void createMigrateButton() {
	migrateButton = new JButton();
	migrateButton.setText("Migrate Project to SLF4J");
	migrateButton.setToolTipText("Click this button to initiate migration of your project.");
	migrateButton.addActionListener(this);
	migrateButton.setActionCommand(MIGRATE_COMMAND);
	}

	private void createFileChooser() {
	fileChooser = new JFileChooser();
	fileChooser.setDialogTitle("Source folder selector");
	fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
	}

	private void createProgressBar() {
	progressBar = new JProgressBar(0, 1);
	progressBar.setPreferredSize(new java.awt.Dimension((int) (X_SIZE * 0.8), 5));
	progressBar.setVisible(false);
	}

	public void disableInput() {
	radioJCL.setEnabled(false);
	radioLog4j.setEnabled(false);

	browseButton.setEnabled(false);

	folderTextField.setEnabled(false);
	awareCheckBox.setEnabled(false);
	migrateButton.setText("Migration in progress");
	migrateButton.setEnabled(false);

	}

	public void actionPerformed(ActionEvent e) {

	if (MIGRATE_COMMAND.equals(e.getActionCommand())) {

	List<String> errorList = doSanityAnalysis();
	if (errorList.size() > 0) {
	showDialogBox(errorList);
	} else {

	File projectFolder = new File(folderTextField.getText());
	int conversionType;
	if (radioJCL.isSelected()) {
	conversionType = Constant.JCL_TO_SLF4J;
	} else if (radioLog4j.isSelected()) {
	conversionType = Constant.LOG4J_TO_SLF4J;
	} else if (radioJUL.isSelected()) {
	conversionType = Constant.JUL_TO_SLF4J;
	} else {
	// we cannot possibly reach here
	throw new IllegalStateException("One of JCL or log4j project must have been previously chosen.");
	}
	ConversionTask task = new ConversionTask(projectFolder, this, conversionType);
	task.launch();
	}
	} else if (BROWSE_COMMAND.equals(e.getActionCommand())) {
	showFileChooser();
	} else if (EXIT_COMMAND.equals(e.getActionCommand())) {
	this.dispose();
	}
	}

	void showFileChooser() {
	int returnVal = fileChooser.showOpenDialog(this);
	if (returnVal == JFileChooser.APPROVE_OPTION) {
	File selectedFile = fileChooser.getSelectedFile();
	folderTextField.setText(selectedFile.getAbsolutePath());
	}
	}

	List<String> doSanityAnalysis() {

	List<String> errorList = new ArrayList<>();
	if (!radioJCL.isSelected() && !radioLog4j.isSelected() && !radioJUL.isSelected()) {
	errorList.add("Please select the migration type: JCL, log4j, or JUL to SLF4J.");
	}

	String folder = folderTextField.getText();

	if (folder == null \|\| folder.length() == 0) {
	errorList.add("Please select the folder of the project to migrate");
	} else if (!isDirectory(folder)) {
	errorList.add("[" + folder + "] does not look like a valid folder");
	}

	if (!awareCheckBox.isSelected()) {
	errorList.add("Cannot initiate migration unless you acknowledge<p>that files will be modified without creating backup files");
	}
	return errorList;
	}

	void showDialogBox(List<String> errorList) {
	StringBuilder buf = new StringBuilder();
	buf.append("<html>");
	int i = 1;
	for (String msg : errorList) {
	buf.append("<p>");
	buf.append(i);
	buf.append(". ");
	buf.append(msg);
	buf.append("");
	i++;
	}
	buf.append("</html>");

	JOptionPane.showMessageDialog(this, buf.toString(), "", JOptionPane.ERROR_MESSAGE);
	}

	boolean isDirectory(String filename) {
	if (filename == null) {
	return false;
	}
	File file = new File(filename);
	if (file.exists() && file.isDirectory()) {
	return true;
	} else {
	return false;
	}
	}
	}