Java tutorial
/******************************************************************************* * Copyright (c) 2012 VMware, Inc. * 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 * * Contributors: * VMware, Inc. - initial API and implementation *******************************************************************************/ package org.cloudfoundry.ide.eclipse.internal.server.ui.wizards; import java.lang.reflect.InvocationTargetException; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.List; import java.util.Map.Entry; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.cloudfoundry.client.lib.CloudService; import org.cloudfoundry.client.lib.ServiceConfiguration; import org.cloudfoundry.client.lib.ServiceConfiguration.Option; import org.cloudfoundry.client.lib.ServiceConfiguration.Tier; import org.cloudfoundry.ide.eclipse.internal.server.core.CloudFoundryServer; import org.cloudfoundry.ide.eclipse.internal.server.ui.CloudFoundryImages; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.UpdateValueStrategy; import org.eclipse.core.databinding.observable.Observables; import org.eclipse.core.databinding.observable.map.WritableMap; import org.eclipse.core.databinding.observable.value.WritableValue; import org.eclipse.core.databinding.validation.IValidator; import org.eclipse.core.databinding.validation.MultiValidator; import org.eclipse.core.databinding.validation.ValidationStatus; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.OperationCanceledException; import org.eclipse.core.runtime.Status; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.databinding.wizard.WizardPageSupport; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IMessageProvider; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.layout.GridLayoutFactory; import org.eclipse.jface.layout.LayoutConstants; import org.eclipse.jface.operation.IRunnableWithProgress; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.jface.wizard.WizardPage; import org.eclipse.osgi.util.NLS; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; 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.Display; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.part.PageBook; import org.eclipse.ui.statushandlers.StatusManager; /** * @author Steffen Pingel * @author Terry Denney * @author Christian Dupuis */ public class CloudFoundryServiceWizardPage extends WizardPage { private DataBindingContext bindingContext; private final CloudFoundryServer cloudServer; private List<ServiceConfiguration> configurations; private WritableMap map; private Text nameText; /** * The data model. */ private CloudService service; private Composite tierDetailsComposite; private Group tierGroup; private PageBook pageBook; private Label tierLabel; private WritableValue tierObservable = new WritableValue(); private Combo typeCombo; private Pattern VALID_CHARS = Pattern.compile("[A-Za-z\\$_0-9\\-]+"); public CloudFoundryServiceWizardPage(CloudFoundryServer cloudServer) { super("service"); this.cloudServer = cloudServer; setTitle("Service Configuration"); setDescription("Finish to add the service."); ImageDescriptor banner = CloudFoundryImages .getWizardBanner(cloudServer.getServer().getServerType().getId()); if (banner != null) { setImageDescriptor(banner); } this.service = new CloudService(); } public void createControl(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); GridLayoutFactory.fillDefaults().numColumns(2).spacing(10, LayoutConstants.getSpacing().y) .applyTo(composite); Label label = new Label(composite, SWT.NONE); label.setText("Name:"); nameText = new Text(composite, SWT.BORDER); GridDataFactory.fillDefaults().grab(true, false).applyTo(nameText); nameText.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { service.setName(nameText.getText()); } }); bindingContext = new DataBindingContext(); map = new WritableMap(); WizardPageSupport.create(this, bindingContext); bindingContext.bindValue(SWTObservables.observeText(nameText, SWT.Modify), Observables.observeMapEntry(map, "name"), new UpdateValueStrategy().setAfterConvertValidator(new StringValidator()), null); label = new Label(composite, SWT.NONE); label.setText("Type:"); typeCombo = new Combo(composite, SWT.READ_ONLY | SWT.BORDER); GridDataFactory.fillDefaults().grab(true, false).applyTo(typeCombo); typeCombo.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { int index = typeCombo.getSelectionIndex(); if (index != -1) { ServiceConfiguration configuration = configurations.get(index); service.setType(configuration.getType()); service.setVendor(configuration.getVendor()); service.setVersion(configuration.getVersion()); } refreshTier(); } }); bindingContext.bindValue(SWTObservables.observeSelection(typeCombo), Observables.observeMapEntry(map, "type"), new UpdateValueStrategy().setAfterConvertValidator(new ComboValidator("Select a type")), null); pageBook = new PageBook(composite, SWT.NONE); GridDataFactory.fillDefaults().grab(true, true).span(2, 1).applyTo(pageBook); tierLabel = new Label(pageBook, SWT.NONE); GridDataFactory.fillDefaults().grab(true, true).applyTo(tierLabel); tierGroup = new Group(pageBook, SWT.BORDER); GridDataFactory.fillDefaults().grab(true, true).applyTo(tierGroup); tierGroup.setLayout(new GridLayout()); tierGroup.setVisible(false); tierGroup.setText("Tier"); MultiValidator validator = new MultiValidator() { protected IStatus validate() { // access tier value to bind validator if (tierObservable.getValue() == null) { return ValidationStatus.cancel("Select a tier"); } return ValidationStatus.ok(); } }; bindingContext.addValidationStatusProvider(validator); Dialog.applyDialogFont(composite); setControl(composite); } public CloudService getService() { return service; } @Override public void setVisible(boolean visible) { super.setVisible(visible); if (visible && configurations == null) { // delay until dialog is actually visible Display.getDefault().asyncExec(new Runnable() { public void run() { if (!getControl().isDisposed()) { refresh(); } } }); } } protected void refresh() { if (updateConfiguration()) { typeCombo.removeAll(); for (ServiceConfiguration configuration : configurations) { typeCombo.add(configuration.getDescription()); } refreshTier(); } } protected void refreshTier() { int index = typeCombo.getSelectionIndex(); if (index == -1) { pageBook.setVisible(false); // tierGroup.setVisible(false); // re-validate tierObservable.setValue(null); } else { pageBook.setVisible(true); for (Control control : tierGroup.getChildren()) { control.dispose(); } ServiceConfiguration configuration = configurations.get(index); List<Tier> tiers = configuration.getTiers(); if (tiers.size() > 1) { pageBook.showPage(tierGroup); // tierGroup.setVisible(true); for (Tier tier : tiers) { Button tierButton = new Button(tierGroup, SWT.RADIO); tierButton.setText(tier.getDescription()); tierButton.setData(tier); tierButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent event) { Button button = (Button) event.widget; if (button.getSelection()) { Tier tier = (Tier) button.getData(); service.setTier(tier.getType()); service.getOptions().clear(); // re-validate tierObservable.setValue(tier); refreshTierDetails(tier); } } }); } tierDetailsComposite = new Composite(tierGroup, SWT.NONE); GridLayoutFactory.fillDefaults().extendedMargins(0, 0, 10, 0).numColumns(2) .applyTo(tierDetailsComposite); } else if (tiers.size() == 1) { pageBook.showPage(tierLabel); Tier tier = tiers.get(0); if (tier.getDescription() != null) { tierLabel.setText(tier.getDescription()); } service.setTier(tier.getType()); service.getOptions().clear(); tierObservable.setValue(tier); } else { pageBook.setVisible(false); } } ((Composite) getControl()).layout(true, true); } protected void refreshTierDetails(Tier tier) { for (Control control : tierDetailsComposite.getChildren()) { control.dispose(); } for (final Option option : tier.getOptions()) { Label label = new Label(tierDetailsComposite, SWT.NONE); label.setText(option.getDescription()); final Combo combo = new Combo(tierDetailsComposite, SWT.READ_ONLY); final List<Entry<String, Integer>> list = new ArrayList<Entry<String, Integer>>( option.getPriceByValue().entrySet()); for (Entry<String, Integer> entry : list) { if (entry.getValue() != null) { combo.add(NLS.bind("{0} (${1}/{2})", new Object[] { entry.getKey(), entry.getValue(), tier.getPricingPeriod() })); } else { combo.add(entry.getKey()); } } combo.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { service.getOptions().put(option.getName(), list.get(combo.getSelectionIndex()).getKey()); } }); bindingContext.bindValue(SWTObservables.observeSelection(combo), Observables.observeMapEntry(map, option.getName()), new UpdateValueStrategy().setAfterConvertValidator( new ComboValidator(NLS.bind("Select a {0}", option.getName()))), null); } tierGroup.layout(true, true); } protected boolean updateConfiguration() { try { getContainer().run(true, false, new IRunnableWithProgress() { public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException { try { configurations = cloudServer.getBehaviour().getServiceConfigurations(monitor); Collections.sort(configurations, new Comparator<ServiceConfiguration>() { public int compare(ServiceConfiguration o1, ServiceConfiguration o2) { return o1.getDescription().compareTo(o2.getDescription()); } }); for (ServiceConfiguration configuration : configurations) { Collections.sort(configuration.getTiers(), new Comparator<Tier>() { public int compare(Tier o1, Tier o2) { return o1.getOrder() - o2.getOrder(); } }); } } catch (CoreException e) { throw new InvocationTargetException(e); } catch (OperationCanceledException e) { throw new InterruptedException(); } finally { monitor.done(); } } }); return true; } catch (InvocationTargetException e) { IStatus status = cloudServer .error(NLS.bind("Configuration retrieval failed: {0}", e.getCause().getMessage()), e); StatusManager.getManager().handle(status, StatusManager.LOG); setMessage(status.getMessage(), IMessageProvider.ERROR); } catch (InterruptedException e) { // ignore } return false; } private class ComboValidator implements IValidator { private final String message; public ComboValidator(String message) { this.message = message; } public IStatus validate(Object value) { if (value instanceof String && ((String) value).length() > 0) { return Status.OK_STATUS; } return ValidationStatus.cancel(message); } } private class StringValidator implements IValidator { public IStatus validate(Object value) { if (value instanceof String) { if (((String) value).length() == 0) { return ValidationStatus.cancel("Enter a name"); } Matcher matcher = VALID_CHARS.matcher((String) value); if (!matcher.matches()) { return ValidationStatus.error("The entered name contains invalid characters."); } } return Status.OK_STATUS; } } }