Java tutorial
/******************************************************************************* * Copyright (c) 2006-2011 Gluster, Inc. <http://www.gluster.com> * This file is part of Gluster Management Console. * * Gluster Management Console is free software; you can redistribute * it and/or modify it under the terms of the GNU General Public * License as published by the Free Software Foundation; either * version 3 of the License, or (at your option) any later version. * * Gluster Management Console is distributed in the hope that it * will be useful, but WITHOUT ANY WARRANTY; without even the * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR * PURPOSE. See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see * <http://www.gnu.org/licenses/>. *******************************************************************************/ package org.gluster.storage.management.console.dialogs; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.UpdateValueStrategy; import org.eclipse.core.databinding.beans.PojoProperties; import org.eclipse.core.databinding.validation.ValidationStatus; import org.eclipse.core.runtime.IStatus; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.databinding.swt.WidgetProperties; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.fieldassist.ControlDecoration; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.TraverseEvent; import org.eclipse.swt.events.TraverseListener; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; import org.gluster.storage.management.client.UsersClient; import org.gluster.storage.management.console.utils.GUIHelper; import org.gluster.storage.management.console.validators.StringRequiredValidator; import org.gluster.storage.management.core.constants.CoreConstants; import org.gluster.storage.management.core.model.ConnectionDetails; public class ChangePasswordDialog extends Dialog { public static final int RETURN_CODE_ERROR = 2; private Text oldPassword; private Text newPassword; private Text confirmPassword; private Button okButton; private final GUIHelper guiHelper = GUIHelper.getInstance(); private Composite composite; private final ConnectionDetails connectionDetails = new ConnectionDetails("gluster", ""); public ChangePasswordDialog(Shell shell) { super(shell); } @Override protected void configureShell(Shell newShell) { super.configureShell(newShell); newShell.setText("Gluster Management Console"); addEscapeListener(newShell); } private void addEscapeListener(Shell shell) { shell.addTraverseListener(new TraverseListener() { @Override public void keyTraversed(TraverseEvent e) { if (e.keyCode == SWT.ESC) { cancelPressed(); } } }); } /** * Overriding to make sure that the dialog is centered in screen */ @Override protected void initializeBounds() { super.initializeBounds(); guiHelper.centerShellInScreen(getShell()); } private void configureDialogLayout(Composite composite) { GridLayout layout = (GridLayout) composite.getLayout(); layout.numColumns = 2; layout.marginLeft = 20; layout.marginRight = 20; layout.marginTop = 20; layout.horizontalSpacing = 20; layout.verticalSpacing = 20; } // ------------------------------------------ private void createLabel(Composite composite, String label) { Label passwordLabel = new Label(composite, SWT.NONE); passwordLabel.setText(label); passwordLabel.setLayoutData(new GridData(GridData.END, GridData.CENTER, false, false)); } private Text createPasswordText(Composite composite) { Text field = new Text(composite, SWT.BORDER | SWT.PASSWORD); GridData layoutData = new GridData(SWT.FILL, GridData.FILL, true, false); layoutData.widthHint = convertWidthInCharsToPixels(32); field.setLayoutData(layoutData); return field; } @Override protected Control createDialogArea(Composite parent) { // parent.setBackgroundImage(guiHelper.getImage(IImageKeys.DIALOG_SPLASH_IMAGE)); parent.setBackgroundMode(SWT.INHERIT_FORCE); composite = (Composite) super.createDialogArea(parent); configureDialogLayout(composite); createLabel(composite, "Old Password:"); oldPassword = createPasswordText(composite); createLabel(composite, "New Password:"); newPassword = createPasswordText(composite); createLabel(composite, "Confirm Password:"); confirmPassword = createPasswordText(composite); createListeners(); return composite; } /** * */ private void createListeners() { ModifyListener listener = new ModifyListener() { @Override public void modifyText(ModifyEvent e) { updateButtonStatus(); } }; oldPassword.addModifyListener(listener); newPassword.addModifyListener(listener); confirmPassword.addModifyListener(listener); } private void updateButtonStatus() { String oldPwd = oldPassword.getText(); String newPwd = newPassword.getText(); String confirmPwd = confirmPassword.getText(); if (oldPwd.isEmpty() || newPwd.isEmpty() || confirmPwd.isEmpty()) { okButton.setEnabled(false); return; } if (!newPwd.equals(confirmPwd)) { okButton.setEnabled(false); return; } if (confirmPwd.equals(CoreConstants.DEFAULT_PASSWORD) || isContainsWhiteSpace(confirmPwd)) { okButton.setEnabled(false); return; } if (newPwd.length() < 4) { // Minimum password length is 4 okButton.setEnabled(false); return; } okButton.setEnabled(true); } @Override protected void createButtonsForButtonBar(Composite parent) { okButton = createButton(parent, IDialogConstants.OK_ID, "&Change", true); okButton.setEnabled(false); createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false); setupDataBinding(); } public boolean isContainsWhiteSpace(String text) { return text.matches(".*[\\s\\\\].*"); // White space or backslash } public class ConfirmPasswordValidator extends StringRequiredValidator { public ConfirmPasswordValidator(String errorText, ControlDecoration controlDecoration, Control linkedControl) { super(errorText, controlDecoration, linkedControl); } @Override public IStatus validate(Object value) { IStatus status = super.validate(value); if (status.isOK()) { String errMsg = null; if (errMsg == null && isContainsWhiteSpace(newPassword.getText())) { errMsg = "Password should not contain space or back slash characters"; } if (!value.equals(newPassword.getText())) { errMsg = "Passwords mismatched"; } if (errMsg == null && value.equals(CoreConstants.DEFAULT_PASSWORD)) { errMsg = "New password should not be a default password"; } if (errMsg != null) { controlDecoration.setDescriptionText(errMsg); controlDecoration.show(); linkedControl.setEnabled(false); return ValidationStatus.error(errMsg); } } return status; } }; private void setupDataBinding() { DataBindingContext dataBindingContext = new DataBindingContext( SWTObservables.getRealm(Display.getCurrent())); UpdateValueStrategy passwordBindingStrategy = new UpdateValueStrategy(UpdateValueStrategy.POLICY_UPDATE); UpdateValueStrategy newPwdBindingStrategy = new UpdateValueStrategy(UpdateValueStrategy.POLICY_UPDATE); UpdateValueStrategy confirmPwdBindingStrategy = new UpdateValueStrategy(UpdateValueStrategy.POLICY_UPDATE); // The Validator shows error decoration and disables OK button on // validation failure passwordBindingStrategy.setBeforeSetValidator(new StringRequiredValidator("Please enter old password!", guiHelper.createErrorDecoration(oldPassword), null)); dataBindingContext.bindValue(WidgetProperties.text(SWT.Modify).observe(oldPassword), PojoProperties.value("password").observe(connectionDetails), passwordBindingStrategy, passwordBindingStrategy); newPwdBindingStrategy.setBeforeSetValidator(new StringRequiredValidator("Please enter new password!", guiHelper.createErrorDecoration(newPassword), null)); dataBindingContext.bindValue(WidgetProperties.text(SWT.Modify).observe(newPassword), PojoProperties.value("newPassword").observe(connectionDetails), newPwdBindingStrategy, newPwdBindingStrategy); confirmPwdBindingStrategy.setBeforeSetValidator(new ConfirmPasswordValidator( "Please enter confirm password!", guiHelper.createErrorDecoration(confirmPassword), null)); dataBindingContext.bindValue(WidgetProperties.text(SWT.Modify).observe(confirmPassword), PojoProperties.value("confirmNewPassword").observe(connectionDetails), confirmPwdBindingStrategy, confirmPwdBindingStrategy); } protected void okPressed() { String user = connectionDetails.getUserId(); String oldPassword = connectionDetails.getPassword(); String newPassword = connectionDetails.getNewPassword(); UsersClient usersClient = new UsersClient(); try { usersClient.changePassword(user, oldPassword, newPassword); MessageDialog.openInformation(getShell(), "Change password", "Password changed successfully!"); this.close(); } catch (Exception e) { MessageDialog.openError(getShell(), "Change password Failed", e.getMessage()); } } }