Java tutorial
/***************************************************************************** * Copyright (c) 2008 g-Eclipse Consortium * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Initial development of the original code was made for the * g-Eclipse project founded by European Union * project number: FP6-IST-034327 http://www.geclipse.eu/ * * Contributors: * Moritz Post - initial API and implementation *****************************************************************************/ package eu.geclipse.aws.ec2.ui.wizards; import java.net.URL; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.jface.wizard.WizardPage; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Combo; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Text; import com.xerox.amazonws.ec2.GroupDescription; import eu.geclipse.aws.ec2.ui.internal.Activator; /** * The CIDR Wizard page providing the form elements for the CIDR wizard. * * @author Moritz Post */ public class CIDRPermissionWizardPage extends WizardPage { /** Id of this Wizard page. */ private static final String WIZARD_PAGE_ID = "eu.geclipse.aws.ec2.ui.wizard.cidrPermission"; //$NON-NLS-1$ /** The possible protocols supported by the amazon permission ruleset. */ private static final String[] protocols = new String[] { "tcp", "udp", "icmp" //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$ }; /** The regex pattern matching a cidr address. */ private Pattern patternCidr = Pattern.compile("[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}/[0-9]{1,2}"); //$NON-NLS-1$ /** The {@link Text} widget element for the CIDR address. */ private Text textCidr; /** The {@link Combo} widget element for the protocol. */ private Combo comboProtocol; /** The {@link Text} widget element for the from port data. */ private Text textFromPort; /** The {@link Text} widget element for the to port data. */ private Text textToPort; /** * The constructor creates the {@link WizardPage} and sets title, description * and page image. * * @param securityGroup the security group to add the cidr entry to */ public CIDRPermissionWizardPage(final GroupDescription securityGroup) { super(CIDRPermissionWizardPage.WIZARD_PAGE_ID, Messages.getString("CIDRPermissionWizardPage.page_title") + securityGroup.getName(), //$NON-NLS-1$ null); setDescription(Messages.getString("CIDRPermissionWizardPage.page_description") //$NON-NLS-1$ + securityGroup.getName()); URL imgUrl = Activator.getDefault().getBundle().getEntry("icons/wizban/security_wiz.gif"); //$NON-NLS-1$ setImageDescriptor(ImageDescriptor.createFromURL(imgUrl)); setPageComplete(false); } public void createControl(final Composite parent) { Composite mainComp = new Composite(parent, SWT.NONE); GridData gData = new GridData(SWT.FILL, SWT.FILL, true, true); mainComp.setLayoutData(gData); GridLayout gridLayout = new GridLayout(4, false); mainComp.setLayout(gridLayout); // cidr Label labelCidr = new Label(mainComp, SWT.NONE); labelCidr.setText(Messages.getString("CIDRPermissionWizardPage.label_cidr")); //$NON-NLS-1$ this.textCidr = new Text(mainComp, SWT.BORDER); this.textCidr.setText("0.0.0.0/0"); //$NON-NLS-1$ this.textCidr.addModifyListener(new ModifyListener() { public void modifyText(final ModifyEvent e) { validateForm(); } }); gData = new GridData(SWT.FILL, SWT.CENTER, true, false); gData.horizontalSpan = 3; this.textCidr.setLayoutData(gData); // protocol Label labelProtocol = new Label(mainComp, SWT.NONE); labelProtocol.setText(Messages.getString("CIDRPermissionWizardPage.label_protcol")); //$NON-NLS-1$ this.comboProtocol = new Combo(mainComp, SWT.BORDER | SWT.READ_ONLY); for (String protocol : CIDRPermissionWizardPage.protocols) { this.comboProtocol.add(protocol); } this.comboProtocol.select(0); gData = new GridData(SWT.FILL, SWT.CENTER, true, false); gData.horizontalSpan = 3; this.comboProtocol.setLayoutData(gData); // from port Label labelFromPort = new Label(mainComp, SWT.NONE); labelFromPort.setText(Messages.getString("CIDRPermissionWizardPage.label_from_port")); //$NON-NLS-1$ this.textFromPort = new Text(mainComp, SWT.BORDER); this.textFromPort.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); this.textFromPort.addModifyListener(new ModifyListener() { public void modifyText(final ModifyEvent e) { validateForm(); } }); // to port Label labelToPort = new Label(mainComp, SWT.NONE); labelToPort.setText(Messages.getString("CIDRPermissionWizardPage.label_to_port")); //$NON-NLS-1$ this.textToPort = new Text(mainComp, SWT.BORDER); this.textToPort.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); this.textToPort.addModifyListener(new ModifyListener() { public void modifyText(final ModifyEvent e) { validateForm(); } }); setControl(parent); } /** * Validate the form input and display an error message if validation failed. */ private void validateForm() { String error = null; Matcher m = this.patternCidr.matcher(this.textCidr.getText().trim()); if (!m.matches()) { error = Messages.getString("CIDRPermissionWizardPage.error_not_valid_cidr"); //$NON-NLS-1$ } if (error == null) { String fromPort = this.textFromPort.getText(); try { Integer.parseInt(fromPort); } catch (NumberFormatException e) { error = Messages.getString("CIDRPermissionWizardPage.error_from_port_not_valid"); //$NON-NLS-1$ } } if (error == null) { String toPort = this.textToPort.getText(); try { Integer.parseInt(toPort); } catch (NumberFormatException e) { error = Messages.getString("CIDRPermissionWizardPage.error_to_port_not_valid"); //$NON-NLS-1$ } } if (error == null) { setErrorMessage(null); setPageComplete(true); } else { setErrorMessage(error); setPageComplete(false); } } /** * Getter for the text in the {@link #textCidr} field. * * @return the cidr address */ public String getCidr() { return this.textCidr.getText().trim(); } /** * Getter for the text in the {@link #comboProtocol} field. * * @return the protocol */ public String getProtocol() { return CIDRPermissionWizardPage.protocols[this.comboProtocol.getSelectionIndex()]; } /** * Getter for the text in the {@link #textFromPort} field. * * @return the start of the port range */ public int getFromPort() { return Integer.parseInt(this.textFromPort.getText().trim()); } /** * Getter for the text in the {@link #textToPort} field. * * @return the end of the port range */ public int getToPort() { return Integer.parseInt(this.textToPort.getText().trim()); } }