update/org.eclipse.update.ui/src/org/eclipse/update/internal/ui/wizards/TargetPage.java - gerrit/platform/eclipse.platform - Git at Google

 package org.eclipse.update.internal.ui.wizards;
 /*
  * (c) Copyright IBM Corp. 2000, 2001.
  * All Rights Reserved.
  */
 import java.io.File;
 import java.net.URL;

 import org.eclipse.core.runtime.*;
 import org.eclipse.jface.dialogs.ErrorDialog;
 import org.eclipse.jface.viewers.*;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.*;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.layout.*;
 import org.eclipse.swt.widgets.*;
 import org.eclipse.ui.help.WorkbenchHelp;
 import org.eclipse.update.configuration.*;
 import org.eclipse.update.core.*;
 import org.eclipse.update.internal.ui.*;
 import org.eclipse.update.internal.ui.model.PendingChange;
 import org.eclipse.update.internal.ui.parts.*;

 public class TargetPage extends BannerPage {
 	// NL keys
 	private static final String KEY_TITLE = "InstallWizard.TargetPage.title";
 	private static final String KEY_DESC = "InstallWizard.TargetPage.desc";
 	private static final String KEY_NEW = "InstallWizard.TargetPage.new";
 	private static final String KEY_REQUIRED_FREE_SPACE =
 		"InstallWizard.TargetPage.requiredSpace";
 	private static final String KEY_AVAILABLE_FREE_SPACE =
 		"InstallWizard.TargetPage.availableSpace";
 	private static final String KEY_LOCATION =
 		"InstallWizard.TargetPage.location";
 	private static final String KEY_LOCATION_MESSAGE =
 		"InstallWizard.TargetPage.location.message";
 	private static final String KEY_LOCATION_EMPTY =
 		"InstallWizard.TargetPage.location.empty";
 	private static final String KEY_LOCATION_ERROR_TITLE =
 		"InstallWizard.TargetPage.location.error.title";
 	private static final String KEY_LOCATION_ERROR_MESSAGE =
 		"InstallWizard.TargetPage.location.error.message";
 	private static final String KEY_ERROR_REASON =
 		"InstallWizard.TargetPage.location.error.reason";
 	private static final String KEY_SIZE = "InstallWizard.TargetPage.size";
 	private static final String KEY_SIZE_UNKNOWN =
 		"InstallWizard.TargetPage.unknownSize";
 	private TableViewer tableViewer;
 	private IInstallConfiguration config;
 	private ConfigListener configListener;
 	private Label requiredSpaceLabel;
 	private Label availableSpaceLabel;
 	private PendingChange pendingChange;
 	private IConfiguredSite defaultTargetSite;
 	private IConfiguredSite affinitySite;

 	class TableContentProvider
 		extends DefaultContentProvider
 		implements IStructuredContentProvider {

 		/**
 		 * @see IStructuredContentProvider#getElements(Object)
 		 */
 		public Object[] getElements(Object parent) {
 			return config.getConfiguredSites();
 		}
 	}

 	class TableLabelProvider
 		extends LabelProvider
 		implements ITableLabelProvider {
 		/**
 		* @see ITableLabelProvider#getColumnImage(Object, int)
 		*/
 		public Image getColumnImage(Object obj, int col) {
 			if (obj instanceof IConfiguredSite)
 				return UpdateUI.getDefault().getLabelProvider().getLocalSiteImage((IConfiguredSite)obj);
 			return null;
 		}

 		/**
 		 * @see ITableLabelProvider#getColumnText(Object, int)
 		 */
 		public String getColumnText(Object obj, int col) {
 			if (obj instanceof IConfiguredSite && col == 0) {
 				IConfiguredSite csite = (IConfiguredSite) obj;
 				ISite site = csite.getSite();
 				URL url = site.getURL();
 				return url.getFile();
 			}
 			return null;
 		}

 	}

 	class ConfigListener implements IInstallConfigurationChangedListener {
 		public void installSiteAdded(IConfiguredSite csite) {
 			tableViewer.add(csite);
 			tableViewer.setSelection(new StructuredSelection(csite));
 		}

 		public void installSiteRemoved(IConfiguredSite csite) {
 			tableViewer.remove(csite);
 		}
 	}

 	/**
 	 * Constructor for ReviewPage
 	 */
 	public TargetPage(
 		PendingChange pendingChange,
 		IInstallConfiguration config) {
 		super("Target");
 		setTitle(UpdateUI.getString(KEY_TITLE));
 		setDescription(UpdateUI.getString(KEY_DESC));
 		this.config = config;
 		this.pendingChange = pendingChange;
 		UpdateUI.getDefault().getLabelProvider().connect(this);
 		configListener = new ConfigListener();
 		defaultTargetSite = getDefaultTargetSite(config, pendingChange, false);
 		affinitySite = getAffinitySite(config, pendingChange.getFeature());
 		if (affinitySite==null)
 			affinitySite = pendingChange.getDefaultTargetSite();
 	}

 	public static IConfiguredSite getDefaultTargetSite(
 		IInstallConfiguration config,
 		PendingChange pendingChange) {
 		return getDefaultTargetSite(config, pendingChange, true);
 	}

 	private static IConfiguredSite getDefaultTargetSite(
 		IInstallConfiguration config,
 		PendingChange pendingChange,
 		boolean checkAffinityFeature) {
 		IFeature oldFeature = pendingChange.getOldFeature();
 		IFeature newFeature = pendingChange.getFeature();
 		if (oldFeature != null) {
 			// We should install into the same site as
 			// the old feature
 			try {
 				return InstallWizard.findConfigSite(oldFeature, config);
 			} catch (CoreException e) {
 				UpdateUI.logException(e, false);
 				return null;
 			}
 		}

 		// This is a new install. Check if there is
 		// a disabled feature with the same ID
 		String newFeatureID = newFeature.getVersionedIdentifier().getIdentifier();
 		IConfiguredSite sameSite = findSameIdFeatureSite(config, newFeatureID);
 		if (sameSite!=null){
 			return sameSite;
 		}

 		if (checkAffinityFeature) {
 			return getAffinitySite(config, newFeature);
 		}
 		return null;
 	}

 	private static IConfiguredSite getAffinitySite(
 		IInstallConfiguration config,
 		IFeature newFeature) {
 		// check if the affinity feature is installed
 		String affinityID = newFeature.getAffinityFeature();
 		if (affinityID!=null){
 			IConfiguredSite affinitySite = findSameIdFeatureSite(config,affinityID);
 			if (affinitySite!=null)
 				return affinitySite;
 		}
 		return null;
 	}

 	private static IConfiguredSite findSameIdFeatureSite(
 		IInstallConfiguration config,
 		String featureID) {
 		if (featureID==null) return null;
 		IConfiguredSite[] sites = config.getConfiguredSites();
 		for (int i = 0; i < sites.length; i++) {
 			IConfiguredSite site = sites[i];
 			IFeatureReference[] refs = site.getFeatureReferences();
 			for (int j = 0; j < refs.length; j++) {
 				IFeatureReference ref = refs[j];
 				try {
 					IFeature feature = ref.getFeature();
 					if (featureID.equals(
 								feature
 								.getVersionedIdentifier()
 								.getIdentifier())) {
 								// found it
 						return site;
 					}
 				} catch (CoreException e) {
 					UpdateUI.logException(e, false);
 				}
 			}
 		}
 		return null;
 	}

 	public void dispose() {
 		UpdateUI.getDefault().getLabelProvider().disconnect(this);
 		config.removeInstallConfigurationChangedListener(configListener);
 		super.dispose();
 	}

 	/**
 	 * @see DialogPage#createControl(Composite)
 	 */
 	public Control createContents(Composite parent) {
 		Composite client = new Composite(parent, SWT.NULL);
 		GridLayout layout = new GridLayout();
 		layout.numColumns = 2;
 		layout.marginWidth = layout.marginHeight = 0;
 		client.setLayout(layout);
 		createTableViewer(client);
 		Composite buttonContainer = new Composite(client, SWT.NULL);
 		GridLayout blayout = new GridLayout();
 		blayout.marginWidth = blayout.marginHeight = 0;
 		buttonContainer.setLayout(blayout);
 		GridData gd = new GridData(GridData.FILL_VERTICAL);
 		buttonContainer.setLayoutData(gd);
 		final Button button = new Button(buttonContainer, SWT.PUSH);
 		button.setText(UpdateUI.getString(KEY_NEW));
 		button.addSelectionListener(new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent e) {
 				addTargetLocation();
 			}
 		});
 		button.setEnabled(affinitySite==null);
 		gd = new GridData(GridData.HORIZONTAL_ALIGN_CENTER);
 		button.setLayoutData(gd);
 		SWTUtil.setButtonDimensionHint(button);
 		Composite status = new Composite(client, SWT.NULL);
 		gd = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
 		gd.horizontalSpan = 2;
 		status.setLayoutData(gd);
 		layout = new GridLayout();
 		layout.numColumns = 2;
 		status.setLayout(layout);
 		Label label = new Label(status, SWT.NULL);
 		label.setText(
 			UpdateUI.getString(KEY_REQUIRED_FREE_SPACE));
 		requiredSpaceLabel = new Label(status, SWT.NULL);
 		requiredSpaceLabel.setLayoutData(
 			new GridData(GridData.FILL_HORIZONTAL));
 		label = new Label(status, SWT.NULL);
 		label.setText(
 			UpdateUI.getString(KEY_AVAILABLE_FREE_SPACE));
 		availableSpaceLabel = new Label(status, SWT.NULL);
 		availableSpaceLabel.setLayoutData(
 			new GridData(GridData.FILL_HORIZONTAL));

 		tableViewer.setInput(UpdateUI.getDefault().getUpdateModel());
 		selectFirstTarget();
 		WorkbenchHelp.setHelp(client, "org.eclipse.update.ui.ReviewPage");
 		return client;
 	}
 	private void createTableViewer(Composite parent) {
 		tableViewer =
 			new TableViewer(parent, SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
 		GridData gd = new GridData(GridData.FILL_BOTH);
 		Table table = tableViewer.getTable();
 		table.setLayoutData(gd);
 		tableViewer.setContentProvider(new TableContentProvider());
 		tableViewer.setLabelProvider(new TableLabelProvider());
 		tableViewer.addFilter(new ViewerFilter() {
 			public boolean select(Viewer v, Object parent, Object obj) {
 				IConfiguredSite site = (IConfiguredSite) obj;
 				return getSiteVisibility(site);
 			}
 		});
 		tableViewer
 			.addSelectionChangedListener(new ISelectionChangedListener() {
 			public void selectionChanged(SelectionChangedEvent event) {
 				ISelection selection = event.getSelection();
 				boolean empty = selection.isEmpty();
 				verifyNotEmpty(empty);
 				updateStatus(
 					((IStructuredSelection) selection).getFirstElement());
 			}
 		});

 		if (config != null)
 			config.addInstallConfigurationChangedListener(configListener);
 	}

 	public void setVisible(boolean visible) {
 		super.setVisible(visible);
 		if (visible) {
 			tableViewer.getTable().setFocus();
 		}
 	}

 	private boolean getSiteVisibility(IConfiguredSite site) {
 		// If affinity site is known, only it should be shown
 		if (affinitySite!=null) {
 			// Must compare referenced sites because
 			// configured sites themselves may come from
 			// different configurations
 			return site.getSite().equals(affinitySite.getSite());
 		}

 		// If this is the default target site, let it show
 		if (site.equals(defaultTargetSite))
 			return true;
 		// Not the default. If update, show only private sites.
 		// If install, allow product site + private sites.
 		if (site.isPrivateSite() && site.isUpdatable())
 			return true;
 		if (pendingChange.getOldFeature() == null && site.isProductSite())
 			return true;
 		return false;
 	}

 	private void verifyNotEmpty(boolean empty) {
 		String errorMessage = null;
 		if (empty)
 			errorMessage = UpdateUI.getString(KEY_LOCATION_EMPTY);
 		setErrorMessage(errorMessage);
 		setPageComplete(!empty);
 	}

 	private void selectFirstTarget() {
 		IConfiguredSite firstSite = defaultTargetSite;
 		if (firstSite == null) {
 			IConfiguredSite[] sites = config.getConfiguredSites();
 			for (int i = 0; i < sites.length; i++) {
 				IConfiguredSite csite = sites[i];
 				if (getSiteVisibility(csite)) {
 					firstSite = csite;
 					break;
 				}
 			}
 		}
 		if (firstSite != null) {
 			tableViewer.setSelection(new StructuredSelection(firstSite));
 		}
 	}

 	private void addTargetLocation() {
 		DirectoryDialog dd = new DirectoryDialog(getContainer().getShell());
 		dd.setMessage(UpdateUI.getString(KEY_LOCATION_MESSAGE));
 		String path = dd.open();
 		if (path != null) {
 			File file = new File(path);
 			addConfiguredSite(getContainer().getShell(), config, file, false);
 		}
 	}

 	public static boolean addConfiguredSite(
 		Shell shell,
 		IInstallConfiguration config,
 		File file,
 		boolean linked) {
 		try {
 			IConfiguredSite csite = null;
 			if (linked) {
 				csite = config.createLinkedConfiguredSite(file);
 				config.addConfiguredSite(csite);
 			} else {
 				csite = config.createConfiguredSite(file);
 				IStatus status = csite.verifyUpdatableStatus();
 				if (status.isOK())
 					config.addConfiguredSite(csite);
 				else {
 					String title =
 						UpdateUI.getString(
 							KEY_LOCATION_ERROR_TITLE);
 					String message =
 						UpdateUI.getFormattedMessage(
 							KEY_LOCATION_ERROR_MESSAGE,
 							file.getPath());
 					String message2 =
 						UpdateUI.getFormattedMessage(
 							KEY_ERROR_REASON,
 							status.getMessage());
 					message = message + "\r\n" + message2;
 					ErrorDialog.openError(shell,title,message,status);
 					return false;
 				}
 			}
 		} catch (CoreException e) {
 			UpdateUI.logException(e);
 			return false;
 		}
 		return true;
 	}

 	private void updateStatus(Object element) {
 		if (element == null) {
 			requiredSpaceLabel.setText("");
 			availableSpaceLabel.setText("");
 			return;
 		}
 		IConfiguredSite site = (IConfiguredSite) element;
 		URL url = site.getSite().getURL();
 		String fileName = url.getFile();
 		File file = new File(fileName);
 		long available = LocalSystemInfo.getFreeSpace(file);
 		long required =
 			site.getSite().getInstallSizeFor(pendingChange.getFeature());
 		if (required == -1)
 			requiredSpaceLabel.setText(
 				UpdateUI.getString(KEY_SIZE_UNKNOWN));
 		else
 			requiredSpaceLabel.setText(
 				UpdateUI.getFormattedMessage(KEY_SIZE, "" + required));

 		if (available == LocalSystemInfo.SIZE_UNKNOWN)
 			availableSpaceLabel.setText(
 				UpdateUI.getString(KEY_SIZE_UNKNOWN));
 		else
 			availableSpaceLabel.setText(
 				UpdateUI.getFormattedMessage(KEY_SIZE, "" + available));
 	}

 	public IConfiguredSite getTargetSite() {
 		IStructuredSelection sel =
 			(IStructuredSelection) tableViewer.getSelection();
 		if (sel.isEmpty())
 			return null;
 		return (IConfiguredSite) sel.getFirstElement();
 	}
 }
	package org.eclipse.update.internal.ui.wizards;
	/*
	* (c) Copyright IBM Corp. 2000, 2001.
	* All Rights Reserved.
	*/
	import java.io.File;
	import java.net.URL;

	import org.eclipse.core.runtime.*;
	import org.eclipse.jface.dialogs.ErrorDialog;
	import org.eclipse.jface.viewers.*;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.*;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.layout.*;
	import org.eclipse.swt.widgets.*;
	import org.eclipse.ui.help.WorkbenchHelp;
	import org.eclipse.update.configuration.*;
	import org.eclipse.update.core.*;
	import org.eclipse.update.internal.ui.*;
	import org.eclipse.update.internal.ui.model.PendingChange;
	import org.eclipse.update.internal.ui.parts.*;

	public class TargetPage extends BannerPage {
	// NL keys
	private static final String KEY_TITLE = "InstallWizard.TargetPage.title";
	private static final String KEY_DESC = "InstallWizard.TargetPage.desc";
	private static final String KEY_NEW = "InstallWizard.TargetPage.new";
	private static final String KEY_REQUIRED_FREE_SPACE =
	"InstallWizard.TargetPage.requiredSpace";
	private static final String KEY_AVAILABLE_FREE_SPACE =
	"InstallWizard.TargetPage.availableSpace";
	private static final String KEY_LOCATION =
	"InstallWizard.TargetPage.location";
	private static final String KEY_LOCATION_MESSAGE =
	"InstallWizard.TargetPage.location.message";
	private static final String KEY_LOCATION_EMPTY =
	"InstallWizard.TargetPage.location.empty";
	private static final String KEY_LOCATION_ERROR_TITLE =
	"InstallWizard.TargetPage.location.error.title";
	private static final String KEY_LOCATION_ERROR_MESSAGE =
	"InstallWizard.TargetPage.location.error.message";
	private static final String KEY_ERROR_REASON =
	"InstallWizard.TargetPage.location.error.reason";
	private static final String KEY_SIZE = "InstallWizard.TargetPage.size";
	private static final String KEY_SIZE_UNKNOWN =
	"InstallWizard.TargetPage.unknownSize";
	private TableViewer tableViewer;
	private IInstallConfiguration config;
	private ConfigListener configListener;
	private Label requiredSpaceLabel;
	private Label availableSpaceLabel;
	private PendingChange pendingChange;
	private IConfiguredSite defaultTargetSite;
	private IConfiguredSite affinitySite;

	class TableContentProvider
	extends DefaultContentProvider
	implements IStructuredContentProvider {

	/**
	* @see IStructuredContentProvider#getElements(Object)
	*/
	public Object[] getElements(Object parent) {
	return config.getConfiguredSites();
	}
	}

	class TableLabelProvider
	extends LabelProvider
	implements ITableLabelProvider {
	/**
	* @see ITableLabelProvider#getColumnImage(Object, int)
	*/
	public Image getColumnImage(Object obj, int col) {
	if (obj instanceof IConfiguredSite)
	return UpdateUI.getDefault().getLabelProvider().getLocalSiteImage((IConfiguredSite)obj);
	return null;
	}

	/**
	* @see ITableLabelProvider#getColumnText(Object, int)
	*/
	public String getColumnText(Object obj, int col) {
	if (obj instanceof IConfiguredSite && col == 0) {
	IConfiguredSite csite = (IConfiguredSite) obj;
	ISite site = csite.getSite();
	URL url = site.getURL();
	return url.getFile();
	}
	return null;
	}

	}

	class ConfigListener implements IInstallConfigurationChangedListener {
	public void installSiteAdded(IConfiguredSite csite) {
	tableViewer.add(csite);
	tableViewer.setSelection(new StructuredSelection(csite));
	}

	public void installSiteRemoved(IConfiguredSite csite) {
	tableViewer.remove(csite);
	}
	}

	/**
	* Constructor for ReviewPage
	*/
	public TargetPage(
	PendingChange pendingChange,
	IInstallConfiguration config) {
	super("Target");
	setTitle(UpdateUI.getString(KEY_TITLE));
	setDescription(UpdateUI.getString(KEY_DESC));
	this.config = config;
	this.pendingChange = pendingChange;
	UpdateUI.getDefault().getLabelProvider().connect(this);
	configListener = new ConfigListener();
	defaultTargetSite = getDefaultTargetSite(config, pendingChange, false);
	affinitySite = getAffinitySite(config, pendingChange.getFeature());
	if (affinitySite==null)
	affinitySite = pendingChange.getDefaultTargetSite();
	}

	public static IConfiguredSite getDefaultTargetSite(
	IInstallConfiguration config,
	PendingChange pendingChange) {
	return getDefaultTargetSite(config, pendingChange, true);
	}

	private static IConfiguredSite getDefaultTargetSite(
	IInstallConfiguration config,
	PendingChange pendingChange,
	boolean checkAffinityFeature) {
	IFeature oldFeature = pendingChange.getOldFeature();
	IFeature newFeature = pendingChange.getFeature();
	if (oldFeature != null) {
	// We should install into the same site as
	// the old feature
	try {
	return InstallWizard.findConfigSite(oldFeature, config);
	} catch (CoreException e) {
	UpdateUI.logException(e, false);
	return null;
	}
	}

	// This is a new install. Check if there is
	// a disabled feature with the same ID
	String newFeatureID = newFeature.getVersionedIdentifier().getIdentifier();
	IConfiguredSite sameSite = findSameIdFeatureSite(config, newFeatureID);
	if (sameSite!=null){
	return sameSite;
	}

	if (checkAffinityFeature) {
	return getAffinitySite(config, newFeature);
	}
	return null;
	}

	private static IConfiguredSite getAffinitySite(
	IInstallConfiguration config,
	IFeature newFeature) {
	// check if the affinity feature is installed
	String affinityID = newFeature.getAffinityFeature();
	if (affinityID!=null){
	IConfiguredSite affinitySite = findSameIdFeatureSite(config,affinityID);
	if (affinitySite!=null)
	return affinitySite;
	}
	return null;
	}

	private static IConfiguredSite findSameIdFeatureSite(
	IInstallConfiguration config,
	String featureID) {
	if (featureID==null) return null;
	IConfiguredSite[] sites = config.getConfiguredSites();
	for (int i = 0; i < sites.length; i++) {
	IConfiguredSite site = sites[i];
	IFeatureReference[] refs = site.getFeatureReferences();
	for (int j = 0; j < refs.length; j++) {
	IFeatureReference ref = refs[j];
	try {
	IFeature feature = ref.getFeature();
	if (featureID.equals(
	feature
	.getVersionedIdentifier()
	.getIdentifier())) {
	// found it
	return site;
	}
	} catch (CoreException e) {
	UpdateUI.logException(e, false);
	}
	}
	}
	return null;
	}

	public void dispose() {
	UpdateUI.getDefault().getLabelProvider().disconnect(this);
	config.removeInstallConfigurationChangedListener(configListener);
	super.dispose();
	}

	/**
	* @see DialogPage#createControl(Composite)
	*/
	public Control createContents(Composite parent) {
	Composite client = new Composite(parent, SWT.NULL);
	GridLayout layout = new GridLayout();
	layout.numColumns = 2;
	layout.marginWidth = layout.marginHeight = 0;
	client.setLayout(layout);
	createTableViewer(client);
	Composite buttonContainer = new Composite(client, SWT.NULL);
	GridLayout blayout = new GridLayout();
	blayout.marginWidth = blayout.marginHeight = 0;
	buttonContainer.setLayout(blayout);
	GridData gd = new GridData(GridData.FILL_VERTICAL);
	buttonContainer.setLayoutData(gd);
	final Button button = new Button(buttonContainer, SWT.PUSH);
	button.setText(UpdateUI.getString(KEY_NEW));
	button.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	addTargetLocation();
	}
	});
	button.setEnabled(affinitySite==null);
	gd = new GridData(GridData.HORIZONTAL_ALIGN_CENTER);
	button.setLayoutData(gd);
	SWTUtil.setButtonDimensionHint(button);
	Composite status = new Composite(client, SWT.NULL);
	gd = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
	gd.horizontalSpan = 2;
	status.setLayoutData(gd);
	layout = new GridLayout();
	layout.numColumns = 2;
	status.setLayout(layout);
	Label label = new Label(status, SWT.NULL);
	label.setText(
	UpdateUI.getString(KEY_REQUIRED_FREE_SPACE));
	requiredSpaceLabel = new Label(status, SWT.NULL);
	requiredSpaceLabel.setLayoutData(
	new GridData(GridData.FILL_HORIZONTAL));
	label = new Label(status, SWT.NULL);
	label.setText(
	UpdateUI.getString(KEY_AVAILABLE_FREE_SPACE));
	availableSpaceLabel = new Label(status, SWT.NULL);
	availableSpaceLabel.setLayoutData(
	new GridData(GridData.FILL_HORIZONTAL));

	tableViewer.setInput(UpdateUI.getDefault().getUpdateModel());
	selectFirstTarget();
	WorkbenchHelp.setHelp(client, "org.eclipse.update.ui.ReviewPage");
	return client;
	}
	private void createTableViewer(Composite parent) {
	tableViewer =
	new TableViewer(parent, SWT.H_SCROLL \| SWT.V_SCROLL \| SWT.BORDER);
	GridData gd = new GridData(GridData.FILL_BOTH);
	Table table = tableViewer.getTable();
	table.setLayoutData(gd);
	tableViewer.setContentProvider(new TableContentProvider());
	tableViewer.setLabelProvider(new TableLabelProvider());
	tableViewer.addFilter(new ViewerFilter() {
	public boolean select(Viewer v, Object parent, Object obj) {
	IConfiguredSite site = (IConfiguredSite) obj;
	return getSiteVisibility(site);
	}
	});
	tableViewer
	.addSelectionChangedListener(new ISelectionChangedListener() {
	public void selectionChanged(SelectionChangedEvent event) {
	ISelection selection = event.getSelection();
	boolean empty = selection.isEmpty();
	verifyNotEmpty(empty);
	updateStatus(
	((IStructuredSelection) selection).getFirstElement());
	}
	});

	if (config != null)
	config.addInstallConfigurationChangedListener(configListener);
	}

	public void setVisible(boolean visible) {
	super.setVisible(visible);
	if (visible) {
	tableViewer.getTable().setFocus();
	}
	}

	private boolean getSiteVisibility(IConfiguredSite site) {
	// If affinity site is known, only it should be shown
	if (affinitySite!=null) {
	// Must compare referenced sites because
	// configured sites themselves may come from
	// different configurations
	return site.getSite().equals(affinitySite.getSite());
	}

	// If this is the default target site, let it show
	if (site.equals(defaultTargetSite))
	return true;
	// Not the default. If update, show only private sites.
	// If install, allow product site + private sites.
	if (site.isPrivateSite() && site.isUpdatable())
	return true;
	if (pendingChange.getOldFeature() == null && site.isProductSite())
	return true;
	return false;
	}

	private void verifyNotEmpty(boolean empty) {
	String errorMessage = null;
	if (empty)
	errorMessage = UpdateUI.getString(KEY_LOCATION_EMPTY);
	setErrorMessage(errorMessage);
	setPageComplete(!empty);
	}

	private void selectFirstTarget() {
	IConfiguredSite firstSite = defaultTargetSite;
	if (firstSite == null) {
	IConfiguredSite[] sites = config.getConfiguredSites();
	for (int i = 0; i < sites.length; i++) {
	IConfiguredSite csite = sites[i];
	if (getSiteVisibility(csite)) {
	firstSite = csite;
	break;
	}
	}
	}
	if (firstSite != null) {
	tableViewer.setSelection(new StructuredSelection(firstSite));
	}
	}

	private void addTargetLocation() {
	DirectoryDialog dd = new DirectoryDialog(getContainer().getShell());
	dd.setMessage(UpdateUI.getString(KEY_LOCATION_MESSAGE));
	String path = dd.open();
	if (path != null) {
	File file = new File(path);
	addConfiguredSite(getContainer().getShell(), config, file, false);
	}
	}

	public static boolean addConfiguredSite(
	Shell shell,
	IInstallConfiguration config,
	File file,
	boolean linked) {
	try {
	IConfiguredSite csite = null;
	if (linked) {
	csite = config.createLinkedConfiguredSite(file);
	config.addConfiguredSite(csite);
	} else {
	csite = config.createConfiguredSite(file);
	IStatus status = csite.verifyUpdatableStatus();
	if (status.isOK())
	config.addConfiguredSite(csite);
	else {
	String title =
	UpdateUI.getString(
	KEY_LOCATION_ERROR_TITLE);
	String message =
	UpdateUI.getFormattedMessage(
	KEY_LOCATION_ERROR_MESSAGE,
	file.getPath());
	String message2 =
	UpdateUI.getFormattedMessage(
	KEY_ERROR_REASON,
	status.getMessage());
	message = message + "\r\n" + message2;
	ErrorDialog.openError(shell,title,message,status);
	return false;
	}
	}
	} catch (CoreException e) {
	UpdateUI.logException(e);
	return false;
	}
	return true;
	}

	private void updateStatus(Object element) {
	if (element == null) {
	requiredSpaceLabel.setText("");
	availableSpaceLabel.setText("");
	return;
	}
	IConfiguredSite site = (IConfiguredSite) element;
	URL url = site.getSite().getURL();
	String fileName = url.getFile();
	File file = new File(fileName);
	long available = LocalSystemInfo.getFreeSpace(file);
	long required =
	site.getSite().getInstallSizeFor(pendingChange.getFeature());
	if (required == -1)
	requiredSpaceLabel.setText(
	UpdateUI.getString(KEY_SIZE_UNKNOWN));
	else
	requiredSpaceLabel.setText(
	UpdateUI.getFormattedMessage(KEY_SIZE, "" + required));

	if (available == LocalSystemInfo.SIZE_UNKNOWN)
	availableSpaceLabel.setText(
	UpdateUI.getString(KEY_SIZE_UNKNOWN));
	else
	availableSpaceLabel.setText(
	UpdateUI.getFormattedMessage(KEY_SIZE, "" + available));
	}

	public IConfiguredSite getTargetSite() {
	IStructuredSelection sel =
	(IStructuredSelection) tableViewer.getSelection();
	if (sel.isEmpty())
	return null;
	return (IConfiguredSite) sel.getFirstElement();
	}
	}