Java tutorial
/* * Copyright 2008-2011 Amazon Technologies, Inc. * * 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://aws.amazon.com/apache2.0 * * This file 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 com.amazonaws.eclipse.ec2.ui.securitygroups; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Combo; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; import com.amazonaws.eclipse.ec2.ui.SwappableComposite; /** * Dialog to collect user input on a security group permission entry. */ public class EditSecurityGroupPermissionEntryDialog extends Dialog { private final String securityGroupName; private SwappableComposite swappableComposite; private UserGroupPermissionComposite userGroupComposite; private PortRangePermissionComposite portRangeComposite; private Button userGroupPermissionButton; private Button portRangePermissionButton; private boolean isUserGroupPermission; public EditSecurityGroupPermissionEntryDialog(Shell parentShell, String securityGroupName) { super(parentShell); this.securityGroupName = securityGroupName; } public UserGroupPermissionComposite getUserGroupPermissionComposite() { return userGroupComposite; } public PortRangePermissionComposite getPortRangePermissionComposite() { return portRangeComposite; } public boolean isUserGroupPermission() { return isUserGroupPermission; } /* * Dialog Interface */ /* * (non-Javadoc) * @see org.eclipse.jface.dialogs.Dialog#createButtonBar(org.eclipse.swt.widgets.Composite) */ @Override protected Control createButtonBar(Composite parent) { Control control = super.createButtonBar(parent); updateOkButton(); return control; } /* (non-Javadoc) * @see org.eclipse.jface.dialogs.Dialog#createDialogArea(org.eclipse.swt.widgets.Composite) */ @Override protected Control createDialogArea(Composite parent) { Composite composite = createComposite(parent); createLabel("Assign permissions by:", composite, 1); portRangePermissionButton = createRadioButton("Protocol, port and network", composite, 2); userGroupPermissionButton = createRadioButton("AWS user and group", composite, 2); swappableComposite = new SwappableComposite(composite, SWT.NONE); swappableComposite.setLayoutData(new GridData(GridData.FILL_BOTH)); userGroupComposite = new UserGroupPermissionComposite(swappableComposite); portRangeComposite = new PortRangePermissionComposite(swappableComposite); SelectionListener listener = new SelectionListener() { public void widgetDefaultSelected(SelectionEvent e) { } public void widgetSelected(SelectionEvent e) { if (e.getSource().equals(userGroupPermissionButton)) { swappableComposite.setActiveComposite(userGroupComposite); } else { swappableComposite.setActiveComposite(portRangeComposite); } } }; userGroupPermissionButton.addSelectionListener(listener); portRangePermissionButton.addSelectionListener(listener); return composite; } /* (non-Javadoc) * @see org.eclipse.jface.dialogs.Dialog#create() */ @Override public void create() { super.create(); Point p = portRangeComposite.computeSize(SWT.DEFAULT, SWT.DEFAULT); Rectangle r = userGroupComposite.getParent().getClientArea(); if (r.width > p.x) p.x = r.width; swappableComposite.setSize(p); // Start off with the user / group permission style selected portRangePermissionButton.setSelection(true); swappableComposite.setActiveComposite(portRangeComposite); getShell().layout(); getShell().setSize(getShell().computeSize(SWT.DEFAULT, SWT.DEFAULT)); } /* (non-Javadoc) * @see org.eclipse.jface.dialogs.Dialog#okPressed() */ @Override protected void okPressed() { userGroupComposite.saveFieldValues(); portRangeComposite.saveFieldValues(); this.isUserGroupPermission = userGroupPermissionButton.getSelection(); super.okPressed(); } /* * Private Classes */ /** * Composite with options for defining security group permissions * by AWS user IDs and groups. */ class UserGroupPermissionComposite extends Composite { private Text securityGroupText; private Text userIdText; private String securityGroup; private String userId; /** * Creates a new composite with the specified parent. * * @param parent The parent for this composite. */ public UserGroupPermissionComposite(Composite parent) { super(parent, SWT.NONE); create(); } public void saveFieldValues() { securityGroup = securityGroupText.getText(); userId = userIdText.getText(); } public String getSecurityGroup() { return securityGroup; } public String getUserId() { return userId; } public boolean isComplete() { if (securityGroupText == null || securityGroupText.getText().length() == 0) return false; if (userIdText == null || userIdText.getText().length() == 0) return false; return true; } private void create() { GridLayout gridLayout = new GridLayout(1, true); gridLayout.marginWidth = 0; setLayout(gridLayout); createLabel("AWS User ID:", this, 1); userIdText = createTextBox(this, 1); createLabel("AWS Security Group:", this, 1); securityGroupText = createTextBox(this, 1); pack(); } } /** * Composite with options for defining security group permissions * by protocol, port and network mask. */ class PortRangePermissionComposite extends Composite { private Combo protocolCombo; private Text portText; private Text networkText; private String protocol; private String network; private int fromPort; private int toPort; private final Pattern networkMaskPattern = Pattern.compile("\\d+\\.\\d+\\.\\d+\\.\\d+/\\d+"); /** * Creates new composite with the specified parent. * * @param parent The parent of this composite. */ public PortRangePermissionComposite(Composite parent) { super(parent, SWT.NONE); create(); } public String getNetwork() { return network; } public int getFromPort() { return fromPort; } public int getToPort() { return toPort; } public String getProtocol() { return protocol.toLowerCase(); } public void saveFieldValues() { protocol = protocolCombo.getText(); network = networkText.getText(); Integer[] ports = extractPortRange(); if (ports != null) { fromPort = ports[0]; toPort = ports[1]; } } /** * Parses the user entered port value and extracts a port range returned * as a two element list of integers. If invalid input is detected null * is returned. * * @return An array of two elements where the first element is the * starting port in the port range and the second is the ending * port in the port range. If invalid input was entered null * will be returned. */ private Integer[] extractPortRange() { if (portText == null) return null; String portInfo = portText.getText().trim(); int port1, port2; if (portInfo.contains("-") && !portInfo.startsWith("-")) { String[] strings = portInfo.split("-"); if (strings.length != 2) return null; try { port1 = Integer.parseInt(strings[0].trim()); port2 = Integer.parseInt(strings[1].trim()); } catch (NumberFormatException nfe) { return null; } } else { try { port1 = Integer.parseInt(portInfo.trim()); port2 = port1; } catch (NumberFormatException nfe) { return null; } } if (port2 < port1) return null; return new Integer[] { port1, port2 }; } public boolean isComplete() { if (extractPortRange() == null) return false; if (networkText == null) return false; Matcher matcher = networkMaskPattern.matcher(networkText.getText()); if (!matcher.matches()) return false; return true; } private void create() { GridLayout gridLayout = new GridLayout(1, true); gridLayout.verticalSpacing = 2; gridLayout.marginHeight = 2; gridLayout.marginTop = 2; gridLayout.marginWidth = 0; setLayout(gridLayout); createLabel("Protocol:", this, 1); protocolCombo = new Combo(this, SWT.NONE | SWT.READ_ONLY); protocolCombo.add("TCP"); protocolCombo.add("UDP"); protocolCombo.add("ICMP"); protocolCombo.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); protocolCombo.select(0); createLabel("Port or Port Range:", this, 1); portText = createTextBox(this, 1); createLabel("Network Mask:", this, 1); networkText = createTextBox(this, 1); networkText.setText("0.0.0.0/0"); pack(); } } private Button createRadioButton(String text, Composite parent, int columnSpan) { Button b = new Button(parent, SWT.RADIO); b.setText(text); GridData gridData = new GridData(GridData.FILL_HORIZONTAL); gridData.horizontalSpan = columnSpan; b.setLayoutData(gridData); b.addSelectionListener(selectionListener); return b; } /* * Private Methods */ private Label createLabel(String text, Composite parent, int columnSpan) { Label label = new Label(parent, SWT.NONE); label.setText(text); GridData gridData = new GridData(GridData.FILL_HORIZONTAL); gridData.verticalAlignment = GridData.VERTICAL_ALIGN_END; gridData.horizontalSpan = columnSpan; gridData.verticalIndent = 2; label.setLayoutData(gridData); return label; } private Text createTextBox(Composite parent, int columnSpan) { Text text = new Text(parent, SWT.BORDER); GridData gridData = new GridData(GridData.FILL_HORIZONTAL); gridData.horizontalSpan = columnSpan; gridData.verticalAlignment = GridData.VERTICAL_ALIGN_BEGINNING; text.setLayoutData(gridData); text.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { updateOkButton(); } }); text.addSelectionListener(selectionListener); return text; } private SelectionListener selectionListener = new SelectionListener() { public void widgetDefaultSelected(SelectionEvent e) { } public void widgetSelected(SelectionEvent e) { updateOkButton(); } }; private Composite createComposite(Composite parent) { Composite composite = new Composite(parent, SWT.BORDER); GridLayout gridLayout = new GridLayout(2, false); gridLayout.marginHeight = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN); gridLayout.marginWidth = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_MARGIN); gridLayout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING); gridLayout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING); gridLayout.marginHeight = 2; composite.setLayout(gridLayout); composite.setLayoutData(new GridData(GridData.FILL_BOTH)); return composite; } private void updateOkButton() { if (userGroupComposite == null || portRangeComposite == null) return; boolean b = false; if (userGroupPermissionButton.getSelection()) { b = userGroupComposite.isComplete(); } else { b = portRangeComposite.isComplete(); } Button okButton = getButton(IDialogConstants.OK_ID); if (okButton != null) { okButton.setEnabled(b); } } }