Java tutorial
/* * jets3t : Java Extra-Tasty S3 Toolkit (for Amazon S3 online storage service) * This is a java.net project, see https://jets3t.dev.java.net/ * * Copyright 2006 James Murty * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.eurocarbdb.application.glycoworkbench.plugin.s3.gui; import java.awt.Frame; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.Insets; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.File; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import javax.swing.JButton; import javax.swing.JFileChooser; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JPasswordField; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.JTextField; import javax.swing.ListSelectionModel; import javax.swing.table.DefaultTableModel; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.jets3t.gui.ErrorDialog; import org.jets3t.gui.HyperlinkActivatedListener; import org.jets3t.gui.JHtmlLabel; import org.jets3t.service.Constants; import org.jets3t.service.security.AWSCredentials; /** * A panel for displaying a user's login credentials where those credentials are stored * in files available on the user's computer. * * @author James Murty */ public class LoginLocalFolderPanel extends JPanel implements ActionListener { private static final long serialVersionUID = 1500994545263522051L; private static final Log log = LogFactory.getLog(LoginLocalFolderPanel.class); private final Insets insetsDefault = new Insets(3, 5, 3, 5); private Frame ownerFrame = null; private HyperlinkActivatedListener hyperlinkListener = null; private File cockpitHomeFolder = null; private JTextField folderPathTextField = null; private JTable accountNicknameTable = null; private AWSCredentialsFileTableModel nicknamesTableModel = null; private JPasswordField passwordPasswordField = null; public LoginLocalFolderPanel(Frame ownerFrame, HyperlinkActivatedListener hyperlinkListener) { super(new GridBagLayout()); this.ownerFrame = ownerFrame; if (Constants.DEFAULT_PREFERENCES_DIRECTORY.exists()) { this.cockpitHomeFolder = Constants.DEFAULT_PREFERENCES_DIRECTORY; } else { this.cockpitHomeFolder = new File(System.getProperty("user.home")); } this.hyperlinkListener = hyperlinkListener; initGui(); refreshStoredCredentialsTable(); } private void initGui() { // Textual information. String descriptionText = "<html><center>" + "Your AWS Credentials are stored in encrypted files in a folder on " + "your computer. Each stored login has a nickname." + "<br><font size=\"-2\">You need to store your AWS credentials before you can use this login method.</font>" + "</center></html>"; String folderTooltipText = "The folder containing your AWS Credentials"; String browseButtonText = "Change Folder"; String accountNicknameText = "Stored logins"; String accountNicknameTooltipText = "Nicknames of the login credentials you have stored"; String passwordLabelText = "Password"; String passwordTooltipText = "The password that protects your encrypted file. " + "This password may be left empty if you are sure your computer cannot be compromised"; // Components. JHtmlLabel descriptionLabel = new JHtmlLabel(descriptionText, hyperlinkListener); descriptionLabel.setHorizontalAlignment(JLabel.CENTER); folderPathTextField = new JTextField(this.cockpitHomeFolder.getAbsolutePath()); folderPathTextField.setEnabled(false); folderPathTextField.setToolTipText(folderTooltipText); JButton browseButton = new JButton(browseButtonText); browseButton.addActionListener(this); JHtmlLabel accountNicknamesLabel = new JHtmlLabel(accountNicknameText, hyperlinkListener); nicknamesTableModel = new AWSCredentialsFileTableModel(); accountNicknameTable = new JTable(nicknamesTableModel); accountNicknameTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); accountNicknameTable.setShowHorizontalLines(true); accountNicknameTable.getTableHeader().setVisible(false); JScrollPane accountNicknamesScrollPane = new JScrollPane(accountNicknameTable); accountNicknamesScrollPane.setToolTipText(accountNicknameTooltipText); JHtmlLabel passwordLabel = new JHtmlLabel(passwordLabelText, hyperlinkListener); passwordPasswordField = new JPasswordField(); passwordPasswordField.setToolTipText(passwordTooltipText); int row = 0; add(descriptionLabel, new GridBagConstraints(0, row++, 2, 1, 0, 0, GridBagConstraints.CENTER, GridBagConstraints.BOTH, insetsDefault, 0, 0)); add(folderPathTextField, new GridBagConstraints(0, row, 1, 1, 1, 0, GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, insetsDefault, 0, 0)); add(browseButton, new GridBagConstraints(1, row++, 1, 1, 0, 0, GridBagConstraints.EAST, GridBagConstraints.NONE, insetsDefault, 0, 0)); add(accountNicknamesLabel, new GridBagConstraints(0, row++, 2, 1, 0, 0, GridBagConstraints.CENTER, GridBagConstraints.BOTH, insetsDefault, 0, 0)); add(accountNicknamesScrollPane, new GridBagConstraints(0, row++, 2, 1, 0, 1, GridBagConstraints.CENTER, GridBagConstraints.BOTH, insetsDefault, 0, 0)); add(passwordLabel, new GridBagConstraints(0, row++, 2, 1, 0, 0, GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, insetsDefault, 0, 0)); add(passwordPasswordField, new GridBagConstraints(0, row++, 2, 1, 1, 0, GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, insetsDefault, 0, 0)); } /** * Refreshes the table of stored AWS credentials by finding <tt>*.enc</tt> files in the * directory specified as the Cockpit home folder. * */ public void refreshStoredCredentialsTable() { nicknamesTableModel.removeAll(); try { File[] files = cockpitHomeFolder.listFiles(); for (int i = 0; files != null && i < files.length; i++) { File candidateFile = files[i]; if (candidateFile.getName().endsWith(".enc")) { // Load partial details from credentials file. AWSCredentials credentials = AWSCredentials.load(null, candidateFile); nicknamesTableModel.addAWSCredentialsFile(credentials, candidateFile); } } } catch (Exception e) { String message = "Unable to find AWS Credential files in the folder " + cockpitHomeFolder.getAbsolutePath(); log.error(message, e); ErrorDialog.showDialog(ownerFrame, hyperlinkListener, message, e); } } private void chooseFolder() { // Prompt user to choose their Cockpit home directory. JFileChooser fileChooser = new JFileChooser(); fileChooser.setAcceptAllFileFilterUsed(true); fileChooser.setDialogTitle("Choose Cockpit Home Folder"); fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY); fileChooser.setApproveButtonText("Choose Folder"); fileChooser.setCurrentDirectory(cockpitHomeFolder); int returnVal = fileChooser.showOpenDialog(ownerFrame); if (returnVal != JFileChooser.APPROVE_OPTION) { return; } else { this.cockpitHomeFolder = fileChooser.getSelectedFile(); this.folderPathTextField.setText(this.cockpitHomeFolder.getAbsolutePath()); refreshStoredCredentialsTable(); } } public void actionPerformed(ActionEvent arg0) { chooseFolder(); } /** * @return * the folder chosen by the user as their Cockpit home. */ public File getHomeFolder() { return this.cockpitHomeFolder; } /** * @return * the AWS Credentials encrypted file chosen by the user. */ public File getAWSCredentialsFile() { int selectedNicknameIndex = accountNicknameTable.getSelectedRow(); if (selectedNicknameIndex < 0) { return null; } return nicknamesTableModel.getAWSCredentialsFile(selectedNicknameIndex); } /** * @return * the password the user provided to unlock their encrypted AWS Credentials file. */ public String getPassword() { return new String(passwordPasswordField.getPassword()); } /** * Clears the user-provided password field. */ public void clearPassword() { passwordPasswordField.setText(""); } private class AWSCredentialsFileTableModel extends DefaultTableModel { private static final long serialVersionUID = 8560515388653630790L; ArrayList awsCredentialsList = new ArrayList(); ArrayList credentialFileList = new ArrayList(); public AWSCredentialsFileTableModel() { super(new String[] { "" }, 0); } public int addAWSCredentialsFile(AWSCredentials awsCredentials, File credentialsFile) { int insertRow = Collections.binarySearch(awsCredentialsList, awsCredentials, new Comparator() { public int compare(Object o1, Object o2) { String name1 = ((AWSCredentials) o1).getFriendlyName(); String name2 = ((AWSCredentials) o2).getFriendlyName(); int result = name1.compareToIgnoreCase(name2); return result; } }); if (insertRow >= 0) { // We already have an item with this key, replace it. awsCredentialsList.remove(insertRow); credentialFileList.remove(insertRow); this.removeRow(insertRow); } else { insertRow = (-insertRow) - 1; } // New object to insert. awsCredentialsList.add(insertRow, awsCredentials); credentialFileList.add(insertRow, credentialsFile); this.insertRow(insertRow, new Object[] { awsCredentials.getFriendlyName() }); return insertRow; } public void removeAll() { int rowCount = this.getRowCount(); for (int i = 0; i < rowCount; i++) { this.removeRow(0); } credentialFileList.clear(); awsCredentialsList.clear(); } public File getAWSCredentialsFile(int row) { return (File) credentialFileList.get(row); } public boolean isCellEditable(int row, int column) { return false; } } }