core/org.eclipse.ptp.services.ui/src/org/eclipse/ptp/services/ui/wizards/ServiceModelWidget.java - ptp/org.eclipse.ptp - Git at Google

 /*******************************************************************************
  * Copyright (c) 2008 IBM Corporation and others.
  * 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:
  * IBM Corporation - Initial API and implementation
  *******************************************************************************/

 package org.eclipse.ptp.services.ui.wizards;

 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.LinkedHashSet;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.SortedSet;

 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.layout.TableColumnLayout;
 import org.eclipse.jface.viewers.ColumnWeightData;
 import org.eclipse.jface.wizard.WizardDialog;
 import org.eclipse.osgi.util.NLS;
 import org.eclipse.ptp.services.core.IService;
 import org.eclipse.ptp.services.core.IServiceConfiguration;
 import org.eclipse.ptp.services.core.IServiceModelManager;
 import org.eclipse.ptp.services.core.IServiceProvider;
 import org.eclipse.ptp.services.core.IServiceProviderDescriptor;
 import org.eclipse.ptp.services.core.ServiceModelManager;
 import org.eclipse.ptp.services.ui.Activator;
 import org.eclipse.ptp.services.ui.IServiceProviderContributor;
 import org.eclipse.ptp.services.ui.ServiceModelUIManager;
 import org.eclipse.ptp.services.ui.dialogs.ServicesDialog;
 import org.eclipse.ptp.services.ui.messages.Messages;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.CCombo;
 import org.eclipse.swt.custom.TableEditor;
 import org.eclipse.swt.layout.FillLayout;
 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.Event;
 import org.eclipse.swt.widgets.Listener;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.TableColumn;
 import org.eclipse.swt.widgets.TableItem;

 /**
  * <strong>EXPERIMENTAL</strong>. This class or interface has been added as
  * part of a work in progress. There is no guarantee that this API will work or
  * that it will remain the same. Please do not use this API without consulting
  * with the RDT team.
  *
  */
 public class ServiceModelWidget {

 	public class AddListener implements Listener {
 		public void handleEvent(Event event) {
 			Set<IService> displaySet = new HashSet<IService>();
 			Set<IService> configServices = getServiceConfiguration().getServices();
 			for (IService service : ServiceModelManager.getInstance().getServices()) {
 				if (!configServices.contains(service)) {
 					displaySet.add(service);
 				}
 			}

 			ServicesDialog dialog = new ServicesDialog(getShell(), displaySet.toArray(new IService[0]));
 			if (dialog.open() == Dialog.OK) {
 				IService[] selectedServices = dialog.getSelectedServices();
 				for (IService service : selectedServices) {
 					SortedSet<IServiceProviderDescriptor> providers = service.getProvidersByPriority();
 					if (providers.size() > 0) {
 						IServiceProvider provider = ServiceModelManager.getInstance().getServiceProvider(providers.iterator().next());
 						addTableRow(service, provider);
 						getServiceConfiguration().setServiceProvider(service, provider);
 					} else {
 						Activator.getDefault().log(NLS.bind(Messages.ServiceModelWidget_8, service.getId()));
 					}
 				}
 				updateAddRemoveButtons();
 			}
 		}
 	}

 	public class ConfigureListener implements Listener {
 		public void handleEvent(Event event) {
 			// launch the configuration UI for the service provider
 			TableItem[] selection = fTable.getSelection();
 			if (selection.length == 0) {
 				return;
 			}
 			TableItem item = selection[0];
 			IServiceProvider provider = (IServiceProvider) item.getData(PROVIDER_KEY);

 			ServiceProviderConfigurationWizard wizard = new ServiceProviderConfigurationWizard(getServiceConfiguration(), provider, null);
 			WizardDialog dialog = new WizardDialog(getShell(), wizard);
 			dialog.open();

 			String configString = provider.getConfigurationString();
 			// column 2 holds the configuration string of the provider's current configuration
 			if (configString == null) {
 				configString = Messages.ServiceModelWidget_4;
 			}
 			item.setText(2, configString);

 			// allow container page to check if configurations are set
 			if (fConfigChangeListener != null) {
 				fConfigChangeListener.handleEvent(null);
 			}
 		}
 	}

 	public class RemoveListener implements Listener {
 		public void handleEvent(Event event) {
 			TableItem[] items = fTable.getSelection();
 			if (items.length == 0) {
 				return;
 			}
 			for (TableItem item : items) {
 				IService service = (IService) item.getData(SERVICE_KEY);
 				if (service != null) {
 					getServiceConfiguration().removeService(service);
 				}
 				fTable.remove(fTable.indexOf(item));
 			}
 			updateAddRemoveButtons();
 		}
 	}

 	protected static final String PROVIDER_KEY = "provider-id"; //$NON-NLS-1$
 	protected static final String SERVICE_KEY = "service-id"; //$NON-NLS-1$

 	protected IServiceConfiguration fServiceConfiguration;
 	protected Map<String, String> fServiceIDToSelectedProviderID;
 	protected Map<String, IServiceProvider> fProviderIDToProviderMap;
 	protected Table fTable;
 	protected Button fConfigureButton;
 	protected Button fAddButton;
 	protected Button fRemoveButton;

 	protected Listener fConfigChangeListener = null;

 	private Shell fShell;

 	public ServiceModelWidget(IServiceConfiguration serviceConfiguration) {
 		fServiceConfiguration = serviceConfiguration;
 		fServiceIDToSelectedProviderID = new HashMap<String, String>();
 		fProviderIDToProviderMap = new HashMap<String, IServiceProvider>();
 	}

 	public Control createContents(Composite parent) {
 		fShell = parent.getShell();

 		Composite canvas = new Composite(parent, SWT.NONE);
 		GridLayout canvasLayout = new GridLayout(2, false);
 		canvas.setLayout(canvasLayout);

 		Composite tableParent = new Composite(canvas, SWT.NONE);
 		tableParent.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

 		fTable = new Table (tableParent, SWT.MULTI | SWT.BORDER | SWT.FULL_SELECTION | SWT.H_SCROLL);
 		fTable.setLinesVisible (true);
 		fTable.setHeaderVisible (true);

 		TableColumnLayout layout = new TableColumnLayout();
 		// create the columns and headers... note fourth column holds "Configure..." buttons and hence has no title.
 		String[] titles = {Messages.ServiceModelWidget_0, Messages.ServiceModelWidget_1, Messages.ServiceModelWidget_3};
 		for (int i=0; i<titles.length; i++) {
 			TableColumn column = new TableColumn (fTable, SWT.NONE);
 			column.setText (titles [i]);
 			int width = ColumnWeightData.MINIMUM_WIDTH;

 			// set the column widths
 			switch (i) {
 			case 0: // Service name... usually short
 				width = 100;
 				break;

 			case 1: // provider name... typically long
 				width = 250;
 				break;

 			case 2: // configuration status... typically short
 				width = 100;
 				break;

 			}

 			layout.setColumnData(column, new ColumnWeightData(1, width, true));


 		}
 		tableParent.setLayout(layout);
 		fTable.setLayout(new FillLayout());

 		createTableContent();

 		fTable.setVisible(true);

 		final TableEditor editor = new TableEditor(fTable);
 		editor.horizontalAlignment = SWT.BEGINNING;
 		editor.grabHorizontal = true;
 		fTable.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event event) {
 				int selectionIndex = fTable.getSelectionIndex();
 				if (selectionIndex == -1) {
 					fConfigureButton.setEnabled(false);
 					return;
 				}
 				final TableItem item = fTable.getItem(selectionIndex);
 				IService service = (IService) item.getData(SERVICE_KEY);
 				IServiceProvider provider = (IServiceProvider) item.getData(PROVIDER_KEY);

 				updateConfigureButton(provider);

 				final CCombo combo = new CCombo(fTable, SWT.READ_ONLY);

 				// populate with list of providers
 				int index = 0;
 				final List<IServiceProviderDescriptor> providerIds = new LinkedList<IServiceProviderDescriptor>();
 				SortedSet<IServiceProviderDescriptor> providers = service.getProvidersByPriority();
 				for (IServiceProviderDescriptor descriptor : providers) {
 					combo.add(descriptor.getName(), index);
 					providerIds.add(descriptor);
 					if (descriptor.getId().equals(provider.getId())) {
 						combo.select(index);
 					}
 					++index;
 				}

 				combo.setFocus();
 				Listener listener = new Listener() {
 					public void handleEvent(Event event) {
 						switch (event.type) {
 						case SWT.FocusOut:
 							combo.dispose();
 							break;
 						case SWT.Selection:
 							int selection = combo.getSelectionIndex();
 							if (selection == -1) {
 								return;
 							}
 							IServiceProviderDescriptor descriptor = providerIds.get(selection);
 							IServiceProvider provider = getServiceProvider(descriptor);

 							/*
 							 * Set the provider name in the second field of the row
 							 */
 							item.setText(1, provider.getName());
 							item.setData(PROVIDER_KEY, provider);

 							updateConfigureButton(descriptor);

 							/*
 							 * Set the configured status in the third field
 							 */
 							item.setText(2, provider.getConfigurationString());

 							/*
 							 * Update the configuration
 							 */
 							IService service = (IService) item.getData(SERVICE_KEY);
 							fServiceIDToSelectedProviderID.put(service.getId(), descriptor.getId());
 							getServiceConfiguration().setServiceProvider(service, provider);

 							// allow container page to check if configurations are set
 							if (fConfigChangeListener != null) {
 								fConfigChangeListener.handleEvent(null);
 							}

 							combo.dispose();
 							break;
 						}
 					}
 				};
 				combo.addListener(SWT.FocusOut, listener);
 				combo.addListener(SWT.Selection, listener);

 				editor.setEditor(combo, item, 1);
 			}
 		});

 		Composite buttonParent = new Composite(canvas, SWT.NONE);
 		GridLayout buttonLayout = new GridLayout(1, true);
 		buttonParent.setLayout(buttonLayout);
 		buttonParent.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

 		fConfigureButton = new Button(buttonParent, SWT.PUSH);
 		fConfigureButton.setEnabled(false);
 		fConfigureButton.setText(Messages.ServiceModelWidget_2);
 		fConfigureButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		Listener configureListener = getConfigureListener();
 		fConfigureButton.addListener(SWT.Selection, configureListener);

 		fAddButton = new Button(buttonParent, SWT.PUSH);
 		fAddButton.setEnabled(true);
 		fAddButton.setText(Messages.ServiceModelWidget_6);
 		fAddButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		Listener addListener = getAddListener();
 		fAddButton.addListener(SWT.Selection, addListener);

 		fRemoveButton = new Button(buttonParent, SWT.PUSH);
 		fRemoveButton.setEnabled(false);
 		fRemoveButton.setText(Messages.ServiceModelWidget_7);
 		fRemoveButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		Listener removeListener = getRemoveListener();
 		fRemoveButton.addListener(SWT.Selection, removeListener);

 		updateAddRemoveButtons();

 		return canvas;
 	}

 	/**
 	 * @return the configuration change listener
 	 */
 	public Listener getConfigChangeListener() {
 		return fConfigChangeListener;
 	}

 	public Map<String, IServiceProvider> getProviderIDToProviderMap() {
 		return fProviderIDToProviderMap;
 	}

 	/**
 	 * Get the service configuration for this widget
 	 *
 	 * @return service configuration
 	 */
 	public IServiceConfiguration getServiceConfiguration() {
 		return fServiceConfiguration;
 	}

 	public Map<String, String> getServiceIDToSelectedProviderID() {
 		return fServiceIDToSelectedProviderID;
 	}

 	public Table getTable() {
 		return fTable;
 	}

 	/**
 	 * Sub-class may override behaviour
 	 * @return true if all available services have been configured
 	 */
 	public boolean isConfigured() {
 		return isConfigured(null, fServiceIDToSelectedProviderID, getProviderIDToProviderMap());
 	}

 	/**
 	 * Listens for changes in service provider configuration
 	 * @param configChangeListener the configuration change listener to set
 	 */
 	public void setConfigChangeListener(Listener configChangeListener) {
 		fConfigChangeListener = configChangeListener;
 	}

 	public void setProviderIDToProviderMap(
 			Map<String, IServiceProvider> providerIDToProviderMap) {
 		fProviderIDToProviderMap = providerIDToProviderMap;
 	}

 	public void setServiceIDToSelectedProviderID(
 			Map<String, String> serviceIDToSelectedProviderID) {
 		fServiceIDToSelectedProviderID = serviceIDToSelectedProviderID;
 	}

 	public void setTable(Table table) {
 		fTable = table;
 	}

 	private void addTableRow(IService service, IServiceProvider provider) {
 		TableItem item = new TableItem (fTable, SWT.NONE);

 		// column 0 lists the name of the service
 		item.setText (0, service.getName());
 		item.setData(SERVICE_KEY, service);

 		// column 1 holds a dropdown with a list of providers
 		// default entry is the first provider if there is one
 		item.setText(1, provider.getName());
 		item.setData(PROVIDER_KEY, provider);

 		// column 2 holds the status string
 		item.setText(2, provider.getConfigurationString());

 		fServiceIDToSelectedProviderID.put(service.getId(), provider.getId());

 		// allow container page to check if configurations are set
 		if (fConfigChangeListener != null) {
 			fConfigChangeListener.handleEvent(null);
 		}
 	}

 	/**
 	 * Get a the service provider for the descriptor. Keeps a cache of service providers.
 	 *
 	 * @param descriptor descriptor for the service provider
 	 * @return service provider
 	 */
 	private IServiceProvider getServiceProvider(IServiceProviderDescriptor descriptor) {
 		IServiceProvider serviceProvider = getProviderIDToProviderMap().get(descriptor.getId());

 		if (serviceProvider == null) {
 			serviceProvider = ServiceModelManager.getInstance().getServiceProvider(descriptor);
 			getProviderIDToProviderMap().put(descriptor.getId(), serviceProvider);
 		}

 		return serviceProvider;
 	}

 	private Shell getShell() {
 		return fShell;
 	}

 	/**
 	 * Generate the services, providers and provider configuration available for
 	 * the given configuration in the table
 	 *
 	 * Sub-classes may override its behaviour
 	 * @param project
 	 */
 	protected void createTableContent() {
 		fTable.removeAll();

 		for (IService service : getServiceConfiguration().getServices()) {
 			addTableRow(service, getServiceConfiguration().getServiceProvider(service));
 		}
 	}

 	//sub class may override to change behaviour
 	protected Listener getAddListener() {
 		return new AddListener();
 	}

 	//sub class may override to change behaviour
 	protected Listener getConfigureListener() {
 		return new ConfigureListener();
 	}

 	/**
 	 * Find available remote services and service providers for a given project
 	 */
 	protected Set<IService> getContributedServices(IProject project) {
 		IServiceModelManager modelManager = ServiceModelManager.getInstance();
 		Set<IService> allApplicableServices = new LinkedHashSet<IService>();

 		if (project != null) {

 			String[] natureIds = new String[] {};
 			try {
 				//get the project natures of the project
 				natureIds = project.getDescription().getNatureIds();
 			} catch (CoreException e) {
 				e.printStackTrace();
 			}

 			for (int i = 0; i < natureIds.length; i++) {
 				String natureId = natureIds[i];
 				Set<IService> services = modelManager.getServices(natureId);
 				if (services != null)
 					allApplicableServices.addAll(services);
 			}
 		}
 		return allApplicableServices;
 	}

 	//sub class may override to change behaviour
 	protected Listener getRemoveListener() {
 		return new RemoveListener();
 	}

 	/**
 	 * Determine if all service providers have been configured
 	 * @param project
 	 * @param serviceIDToSelectedProviderID
 	 * @param providerIDToProviderMap
 	 * @return true if all service providers have been configured
 	 */
 	protected boolean isConfigured(IProject project, Map<String, String> serviceIDToSelectedProviderID, Map<String, IServiceProvider> providerIDToProviderMap) {
 		Set<IService> allApplicableServices = getContributedServices(project);
 		Iterator<IService> iterator = allApplicableServices.iterator();
 		boolean configured = true;
 		while (iterator.hasNext()) {
 			String providerID = serviceIDToSelectedProviderID.get(iterator.next().getId());
 			if (providerID == null)
 				return false;
 			else {
 				IServiceProvider provider = providerIDToProviderMap.get(providerID);
 				if (provider == null)
 					return false;
 				else
 					configured = configured && provider.isConfigured();
 			}
 		}
 		return configured;
 	}

 	protected void updateAddRemoveButtons() {
 		Set<IService> services = ServiceModelManager.getInstance().getServices();
 		fAddButton.setEnabled(services.size() > fTable.getItemCount());
 		fRemoveButton.setEnabled(fTable.getItemCount() > 0);
 	}

 	/**
 	 * Enable/disable the configure button in this widget based on the service provider descriptor selected
 	 * @param enabled
 	 */
 	protected void updateConfigureButton(IServiceProviderDescriptor descriptor) {
 		IServiceProviderContributor config = ServiceModelUIManager.getInstance().getServiceProviderContributor(descriptor);
 		fConfigureButton.setEnabled(config != null);
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2008 IBM Corporation and others.
	* 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:
	* IBM Corporation - Initial API and implementation
	*******************************************************************************/

	package org.eclipse.ptp.services.ui.wizards;

	import java.util.HashMap;
	import java.util.HashSet;
	import java.util.Iterator;
	import java.util.LinkedHashSet;
	import java.util.LinkedList;
	import java.util.List;
	import java.util.Map;
	import java.util.Set;
	import java.util.SortedSet;

	import org.eclipse.core.resources.IProject;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.jface.layout.TableColumnLayout;
	import org.eclipse.jface.viewers.ColumnWeightData;
	import org.eclipse.jface.wizard.WizardDialog;
	import org.eclipse.osgi.util.NLS;
	import org.eclipse.ptp.services.core.IService;
	import org.eclipse.ptp.services.core.IServiceConfiguration;
	import org.eclipse.ptp.services.core.IServiceModelManager;
	import org.eclipse.ptp.services.core.IServiceProvider;
	import org.eclipse.ptp.services.core.IServiceProviderDescriptor;
	import org.eclipse.ptp.services.core.ServiceModelManager;
	import org.eclipse.ptp.services.ui.Activator;
	import org.eclipse.ptp.services.ui.IServiceProviderContributor;
	import org.eclipse.ptp.services.ui.ServiceModelUIManager;
	import org.eclipse.ptp.services.ui.dialogs.ServicesDialog;
	import org.eclipse.ptp.services.ui.messages.Messages;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.custom.CCombo;
	import org.eclipse.swt.custom.TableEditor;
	import org.eclipse.swt.layout.FillLayout;
	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.Event;
	import org.eclipse.swt.widgets.Listener;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.swt.widgets.Table;
	import org.eclipse.swt.widgets.TableColumn;
	import org.eclipse.swt.widgets.TableItem;

	/**
	* <strong>EXPERIMENTAL</strong>. This class or interface has been added as
	* part of a work in progress. There is no guarantee that this API will work or
	* that it will remain the same. Please do not use this API without consulting
	* with the RDT team.
	*
	*/
	public class ServiceModelWidget {

	public class AddListener implements Listener {
	public void handleEvent(Event event) {
	Set<IService> displaySet = new HashSet<IService>();
	Set<IService> configServices = getServiceConfiguration().getServices();
	for (IService service : ServiceModelManager.getInstance().getServices()) {
	if (!configServices.contains(service)) {
	displaySet.add(service);
	}
	}

	ServicesDialog dialog = new ServicesDialog(getShell(), displaySet.toArray(new IService[0]));
	if (dialog.open() == Dialog.OK) {
	IService[] selectedServices = dialog.getSelectedServices();
	for (IService service : selectedServices) {
	SortedSet<IServiceProviderDescriptor> providers = service.getProvidersByPriority();
	if (providers.size() > 0) {
	IServiceProvider provider = ServiceModelManager.getInstance().getServiceProvider(providers.iterator().next());
	addTableRow(service, provider);
	getServiceConfiguration().setServiceProvider(service, provider);
	} else {
	Activator.getDefault().log(NLS.bind(Messages.ServiceModelWidget_8, service.getId()));
	}
	}
	updateAddRemoveButtons();
	}
	}
	}

	public class ConfigureListener implements Listener {
	public void handleEvent(Event event) {
	// launch the configuration UI for the service provider
	TableItem[] selection = fTable.getSelection();
	if (selection.length == 0) {
	return;
	}
	TableItem item = selection[0];
	IServiceProvider provider = (IServiceProvider) item.getData(PROVIDER_KEY);

	ServiceProviderConfigurationWizard wizard = new ServiceProviderConfigurationWizard(getServiceConfiguration(), provider, null);
	WizardDialog dialog = new WizardDialog(getShell(), wizard);
	dialog.open();

	String configString = provider.getConfigurationString();
	// column 2 holds the configuration string of the provider's current configuration
	if (configString == null) {
	configString = Messages.ServiceModelWidget_4;
	}
	item.setText(2, configString);

	// allow container page to check if configurations are set
	if (fConfigChangeListener != null) {
	fConfigChangeListener.handleEvent(null);
	}
	}
	}

	public class RemoveListener implements Listener {
	public void handleEvent(Event event) {
	TableItem[] items = fTable.getSelection();
	if (items.length == 0) {
	return;
	}
	for (TableItem item : items) {
	IService service = (IService) item.getData(SERVICE_KEY);
	if (service != null) {
	getServiceConfiguration().removeService(service);
	}
	fTable.remove(fTable.indexOf(item));
	}
	updateAddRemoveButtons();
	}
	}

	protected static final String PROVIDER_KEY = "provider-id"; //$NON-NLS-1$
	protected static final String SERVICE_KEY = "service-id"; //$NON-NLS-1$

	protected IServiceConfiguration fServiceConfiguration;
	protected Map<String, String> fServiceIDToSelectedProviderID;
	protected Map<String, IServiceProvider> fProviderIDToProviderMap;
	protected Table fTable;
	protected Button fConfigureButton;
	protected Button fAddButton;
	protected Button fRemoveButton;

	protected Listener fConfigChangeListener = null;

	private Shell fShell;

	public ServiceModelWidget(IServiceConfiguration serviceConfiguration) {
	fServiceConfiguration = serviceConfiguration;
	fServiceIDToSelectedProviderID = new HashMap<String, String>();
	fProviderIDToProviderMap = new HashMap<String, IServiceProvider>();
	}

	public Control createContents(Composite parent) {
	fShell = parent.getShell();

	Composite canvas = new Composite(parent, SWT.NONE);
	GridLayout canvasLayout = new GridLayout(2, false);
	canvas.setLayout(canvasLayout);

	Composite tableParent = new Composite(canvas, SWT.NONE);
	tableParent.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

	fTable = new Table (tableParent, SWT.MULTI \| SWT.BORDER \| SWT.FULL_SELECTION \| SWT.H_SCROLL);
	fTable.setLinesVisible (true);
	fTable.setHeaderVisible (true);

	TableColumnLayout layout = new TableColumnLayout();
	// create the columns and headers... note fourth column holds "Configure..." buttons and hence has no title.
	String[] titles = {Messages.ServiceModelWidget_0, Messages.ServiceModelWidget_1, Messages.ServiceModelWidget_3};
	for (int i=0; i<titles.length; i++) {
	TableColumn column = new TableColumn (fTable, SWT.NONE);
	column.setText (titles [i]);
	int width = ColumnWeightData.MINIMUM_WIDTH;

	// set the column widths
	switch (i) {
	case 0: // Service name... usually short
	width = 100;
	break;

	case 1: // provider name... typically long
	width = 250;
	break;

	case 2: // configuration status... typically short
	width = 100;
	break;

	}

	layout.setColumnData(column, new ColumnWeightData(1, width, true));


	}
	tableParent.setLayout(layout);
	fTable.setLayout(new FillLayout());

	createTableContent();

	fTable.setVisible(true);

	final TableEditor editor = new TableEditor(fTable);
	editor.horizontalAlignment = SWT.BEGINNING;
	editor.grabHorizontal = true;
	fTable.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event event) {
	int selectionIndex = fTable.getSelectionIndex();
	if (selectionIndex == -1) {
	fConfigureButton.setEnabled(false);
	return;
	}
	final TableItem item = fTable.getItem(selectionIndex);
	IService service = (IService) item.getData(SERVICE_KEY);
	IServiceProvider provider = (IServiceProvider) item.getData(PROVIDER_KEY);

	updateConfigureButton(provider);

	final CCombo combo = new CCombo(fTable, SWT.READ_ONLY);

	// populate with list of providers
	int index = 0;
	final List<IServiceProviderDescriptor> providerIds = new LinkedList<IServiceProviderDescriptor>();
	SortedSet<IServiceProviderDescriptor> providers = service.getProvidersByPriority();
	for (IServiceProviderDescriptor descriptor : providers) {
	combo.add(descriptor.getName(), index);
	providerIds.add(descriptor);
	if (descriptor.getId().equals(provider.getId())) {
	combo.select(index);
	}
	++index;
	}

	combo.setFocus();
	Listener listener = new Listener() {
	public void handleEvent(Event event) {
	switch (event.type) {
	case SWT.FocusOut:
	combo.dispose();
	break;
	case SWT.Selection:
	int selection = combo.getSelectionIndex();
	if (selection == -1) {
	return;
	}
	IServiceProviderDescriptor descriptor = providerIds.get(selection);
	IServiceProvider provider = getServiceProvider(descriptor);

	/*
	* Set the provider name in the second field of the row
	*/
	item.setText(1, provider.getName());
	item.setData(PROVIDER_KEY, provider);

	updateConfigureButton(descriptor);

	/*
	* Set the configured status in the third field
	*/
	item.setText(2, provider.getConfigurationString());

	/*
	* Update the configuration
	*/
	IService service = (IService) item.getData(SERVICE_KEY);
	fServiceIDToSelectedProviderID.put(service.getId(), descriptor.getId());
	getServiceConfiguration().setServiceProvider(service, provider);

	// allow container page to check if configurations are set
	if (fConfigChangeListener != null) {
	fConfigChangeListener.handleEvent(null);
	}

	combo.dispose();
	break;
	}
	}
	};
	combo.addListener(SWT.FocusOut, listener);
	combo.addListener(SWT.Selection, listener);

	editor.setEditor(combo, item, 1);
	}
	});

	Composite buttonParent = new Composite(canvas, SWT.NONE);
	GridLayout buttonLayout = new GridLayout(1, true);
	buttonParent.setLayout(buttonLayout);
	buttonParent.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

	fConfigureButton = new Button(buttonParent, SWT.PUSH);
	fConfigureButton.setEnabled(false);
	fConfigureButton.setText(Messages.ServiceModelWidget_2);
	fConfigureButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	Listener configureListener = getConfigureListener();
	fConfigureButton.addListener(SWT.Selection, configureListener);

	fAddButton = new Button(buttonParent, SWT.PUSH);
	fAddButton.setEnabled(true);
	fAddButton.setText(Messages.ServiceModelWidget_6);
	fAddButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	Listener addListener = getAddListener();
	fAddButton.addListener(SWT.Selection, addListener);

	fRemoveButton = new Button(buttonParent, SWT.PUSH);
	fRemoveButton.setEnabled(false);
	fRemoveButton.setText(Messages.ServiceModelWidget_7);
	fRemoveButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	Listener removeListener = getRemoveListener();
	fRemoveButton.addListener(SWT.Selection, removeListener);

	updateAddRemoveButtons();

	return canvas;
	}

	/**
	* @return the configuration change listener
	*/
	public Listener getConfigChangeListener() {
	return fConfigChangeListener;
	}

	public Map<String, IServiceProvider> getProviderIDToProviderMap() {
	return fProviderIDToProviderMap;
	}

	/**
	* Get the service configuration for this widget
	*
	* @return service configuration
	*/
	public IServiceConfiguration getServiceConfiguration() {
	return fServiceConfiguration;
	}

	public Map<String, String> getServiceIDToSelectedProviderID() {
	return fServiceIDToSelectedProviderID;
	}

	public Table getTable() {
	return fTable;
	}

	/**
	* Sub-class may override behaviour
	* @return true if all available services have been configured
	*/
	public boolean isConfigured() {
	return isConfigured(null, fServiceIDToSelectedProviderID, getProviderIDToProviderMap());
	}

	/**
	* Listens for changes in service provider configuration
	* @param configChangeListener the configuration change listener to set
	*/
	public void setConfigChangeListener(Listener configChangeListener) {
	fConfigChangeListener = configChangeListener;
	}

	public void setProviderIDToProviderMap(
	Map<String, IServiceProvider> providerIDToProviderMap) {
	fProviderIDToProviderMap = providerIDToProviderMap;
	}

	public void setServiceIDToSelectedProviderID(
	Map<String, String> serviceIDToSelectedProviderID) {
	fServiceIDToSelectedProviderID = serviceIDToSelectedProviderID;
	}

	public void setTable(Table table) {
	fTable = table;
	}

	private void addTableRow(IService service, IServiceProvider provider) {
	TableItem item = new TableItem (fTable, SWT.NONE);

	// column 0 lists the name of the service
	item.setText (0, service.getName());
	item.setData(SERVICE_KEY, service);

	// column 1 holds a dropdown with a list of providers
	// default entry is the first provider if there is one
	item.setText(1, provider.getName());
	item.setData(PROVIDER_KEY, provider);

	// column 2 holds the status string
	item.setText(2, provider.getConfigurationString());

	fServiceIDToSelectedProviderID.put(service.getId(), provider.getId());

	// allow container page to check if configurations are set
	if (fConfigChangeListener != null) {
	fConfigChangeListener.handleEvent(null);
	}
	}

	/**
	* Get a the service provider for the descriptor. Keeps a cache of service providers.
	*
	* @param descriptor descriptor for the service provider
	* @return service provider
	*/
	private IServiceProvider getServiceProvider(IServiceProviderDescriptor descriptor) {
	IServiceProvider serviceProvider = getProviderIDToProviderMap().get(descriptor.getId());

	if (serviceProvider == null) {
	serviceProvider = ServiceModelManager.getInstance().getServiceProvider(descriptor);
	getProviderIDToProviderMap().put(descriptor.getId(), serviceProvider);
	}

	return serviceProvider;
	}

	private Shell getShell() {
	return fShell;
	}

	/**
	* Generate the services, providers and provider configuration available for
	* the given configuration in the table
	*
	* Sub-classes may override its behaviour
	* @param project
	*/
	protected void createTableContent() {
	fTable.removeAll();

	for (IService service : getServiceConfiguration().getServices()) {
	addTableRow(service, getServiceConfiguration().getServiceProvider(service));
	}
	}

	//sub class may override to change behaviour
	protected Listener getAddListener() {
	return new AddListener();
	}

	//sub class may override to change behaviour
	protected Listener getConfigureListener() {
	return new ConfigureListener();
	}

	/**
	* Find available remote services and service providers for a given project
	*/
	protected Set<IService> getContributedServices(IProject project) {
	IServiceModelManager modelManager = ServiceModelManager.getInstance();
	Set<IService> allApplicableServices = new LinkedHashSet<IService>();

	if (project != null) {

	String[] natureIds = new String[] {};
	try {
	//get the project natures of the project
	natureIds = project.getDescription().getNatureIds();
	} catch (CoreException e) {
	e.printStackTrace();
	}

	for (int i = 0; i < natureIds.length; i++) {
	String natureId = natureIds[i];
	Set<IService> services = modelManager.getServices(natureId);
	if (services != null)
	allApplicableServices.addAll(services);
	}
	}
	return allApplicableServices;
	}

	//sub class may override to change behaviour
	protected Listener getRemoveListener() {
	return new RemoveListener();
	}

	/**
	* Determine if all service providers have been configured
	* @param project
	* @param serviceIDToSelectedProviderID
	* @param providerIDToProviderMap
	* @return true if all service providers have been configured
	*/
	protected boolean isConfigured(IProject project, Map<String, String> serviceIDToSelectedProviderID, Map<String, IServiceProvider> providerIDToProviderMap) {
	Set<IService> allApplicableServices = getContributedServices(project);
	Iterator<IService> iterator = allApplicableServices.iterator();
	boolean configured = true;
	while (iterator.hasNext()) {
	String providerID = serviceIDToSelectedProviderID.get(iterator.next().getId());
	if (providerID == null)
	return false;
	else {
	IServiceProvider provider = providerIDToProviderMap.get(providerID);
	if (provider == null)
	return false;
	else
	configured = configured && provider.isConfigured();
	}
	}
	return configured;
	}

	protected void updateAddRemoveButtons() {
	Set<IService> services = ServiceModelManager.getInstance().getServices();
	fAddButton.setEnabled(services.size() > fTable.getItemCount());
	fRemoveButton.setEnabled(fTable.getItemCount() > 0);
	}

	/**
	* Enable/disable the configure button in this widget based on the service provider descriptor selected
	* @param enabled
	*/
	protected void updateConfigureButton(IServiceProviderDescriptor descriptor) {
	IServiceProviderContributor config = ServiceModelUIManager.getInstance().getServiceProviderContributor(descriptor);
	fConfigureButton.setEnabled(config != null);
	}
	}