update/org.eclipse.update.core/src/org/eclipse/update/internal/core/InstallConfiguration.java - platform/eclipse.platform - Git at Google

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

 import org.eclipse.core.boot.BootLoader;
 import org.eclipse.core.boot.IPlatformConfiguration;
 import org.eclipse.core.runtime.*;
 import org.eclipse.update.configuration.*;
 import org.eclipse.update.core.IFeatureReference;
 import org.eclipse.update.internal.model.*;

 /**
  * An InstallConfigurationModel is
  *
  */

 public class InstallConfiguration extends InstallConfigurationModel implements IInstallConfiguration, IWritable {

 	private ListenersList listeners = new ListenersList();

 	public InstallConfiguration() {
 	}

 	/**
 	 * default constructor. Create
 	 */
 	public InstallConfiguration(URL newLocation, String label) throws MalformedURLException {
 		setLocationURLString(newLocation.toExternalForm());
 		setLabel(label);
 		setCurrent(false);
 		resolve(newLocation, null);
 	}

 	/*
 	 * copy constructor
 	 */
 	public InstallConfiguration(IInstallConfiguration config, URL newLocation, String label) throws MalformedURLException {
 		setLocationURLString(newLocation.toExternalForm());
 		setLabel(label);
 		// do not copy list of listeners nor activities
 		// ake a copy of the siteConfiguration object
 		if (config != null) {
 			IConfiguredSite[] sites = config.getConfiguredSites();
 			if (sites != null) {
 				for (int i = 0; i < sites.length; i++) {
 					ConfiguredSite configSite = new ConfiguredSite(sites[i]);
 					addConfigurationSiteModel(configSite);
 				}
 			}
 		}
 		// set dummy date as caller can call set date if the
 		// date on the URL string has to be the same
 		setCreationDate(new Date());
 		setCurrent(false);
 		resolve(newLocation, null);
 	}

 	/**
 	 *
 	 */
 	public IConfiguredSite[] getConfiguredSites() {
 		ConfiguredSiteModel[] result = getConfigurationSitesModel();
 		if (result.length == 0)
 			return new IConfiguredSite[0];
 		else
 			return (IConfiguredSite[]) result;
 	}

 	/**
 	 *
 	 */
 	public void addConfiguredSite(IConfiguredSite site) {
 		if (!isCurrent() && isReadOnly())
 			return;

 		//Start UOW ?
 		ConfigurationActivity activity = new ConfigurationActivity(IActivity.ACTION_SITE_INSTALL);
 		activity.setLabel(site.getSite().getURL().toExternalForm());
 		activity.setDate(new Date());
 		ConfiguredSiteModel configSiteModel = (ConfiguredSiteModel) site;
 		addConfigurationSiteModel(configSiteModel);
 		configSiteModel.setInstallConfigurationModel(this);
 		// notify listeners
 		Object[] configurationListeners = listeners.getListeners();
 		for (int i = 0; i < configurationListeners.length; i++) {
 			((IInstallConfigurationChangedListener) configurationListeners[i]).installSiteAdded(site);
 		}
 		// everything done ok
 		activity.setStatus(IActivity.STATUS_OK);
 		this.addActivityModel((ConfigurationActivityModel) activity);
 	}

 	/**
 	 * add multiple sites in one activity
 	 */
 	public void setConfigurationSites(IConfiguredSite[] site) {
 		if (!isCurrent() && isReadOnly())
 			return;

 		if (site == null)
 			return;

 		for (int index = 0; index < site.length; index++) {
 			addConfiguredSite(site[index]);
 		}

 	}

 	/**
 	 *
 	 */
 	public void removeConfiguredSite(IConfiguredSite site) {

 		if (removeConfigurationSiteModel((ConfiguredSiteModel) site)) { // notify listeners
 			Object[] configurationListeners = listeners.getListeners();
 			for (int i = 0; i < configurationListeners.length; i++) {
 				((IInstallConfigurationChangedListener) configurationListeners[i]).installSiteRemoved(site);
 			}

 			//activity
 			ConfigurationActivity activity = new ConfigurationActivity(IActivity.ACTION_SITE_REMOVE);
 			activity.setLabel(site.getSite().getURL().toExternalForm());
 			activity.setDate(new Date());
 			activity.setStatus(IActivity.STATUS_OK);
 			this.addActivityModel((ConfigurationActivityModel) activity);

 		}
 	}

 	/*
 	 * @see IInstallConfiguration#addInstallConfigurationChangedListener(IInstallConfigurationChangedListener)
 	 */
 	public void addInstallConfigurationChangedListener(IInstallConfigurationChangedListener listener) {
 		synchronized (listeners) {
 			listeners.add(listener);
 		}
 	}
 	/*
 	 * @see IInstallConfiguration#removeInstallConfigurationChangedListener(IInstallConfigurationChangedListener)
 	 */
 	public void removeInstallConfigurationChangedListener(IInstallConfigurationChangedListener listener) {
 		synchronized (listeners) {
 			listeners.remove(listener);
 		}
 	}
 	/*
 	 * @see IInstallConfiguration#export(File)
 	 */
 	public void export(File exportFile) throws CoreException {
 		try {
 			PrintWriter fileWriter = new PrintWriter(new FileOutputStream(exportFile));
 			Writer writer = new Writer();
 			writer.writeSite(this, fileWriter);
 			fileWriter.close();
 		} catch (FileNotFoundException e) {
 			String id = UpdateManagerPlugin.getPlugin().getDescriptor().getUniqueIdentifier();
 			IStatus status = new Status(IStatus.ERROR, id, IStatus.OK, Policy.bind("InstallConfiguration.UnableToSaveConfiguration", exportFile.getAbsolutePath()), e); //$NON-NLS-1$
 			throw new CoreException(status);
 		}
 	}
 	/**
 	 * Deletes the configuration from its URL/location
 	 */
 	public void remove() {
 		// save the configuration
 		if (getURL().getProtocol().equalsIgnoreCase("file")) { //$NON-NLS-1$
 			// the location points to a file
 			File file = new File(getURL().getFile());
 			UpdateManagerUtils.removeFromFileSystem(file);
 		}
 	}
 	/**
 	 * Saves the configuration into its URL/location
 	 */
 	public void save() throws CoreException {

 		// save the configuration.xml file
 		saveConfigurationFile();

 		// Write info  into platform for the next runtime
 		IPlatformConfiguration runtimeConfiguration = BootLoader.getCurrentPlatformConfiguration();
 		ConfiguredSiteModel[] configurationSites = getConfigurationSitesModel();

 		for (int i = 0; i < configurationSites.length; i++) {
 			IConfiguredSite element = (IConfiguredSite) configurationSites[i];
 			ConfigurationPolicy configurationPolicy = ((ConfiguredSite) element).getConfigurationPolicy();

 			// obtain the list of plugins
 			ConfiguredSite cSite = ((ConfiguredSite) element);
 			String[] pluginPath = configurationPolicy.getPluginPath(element.getSite(), cSite.getPreviousPluginPath());

 			IPlatformConfiguration.ISitePolicy sitePolicy = runtimeConfiguration.createSitePolicy(configurationPolicy.getPolicy(), pluginPath);

 			// determine the URL to check
 			URL urlToCheck = null;
 			ConfiguredSiteModel configSiteModel = null;
 			try {
 				configSiteModel = (ConfiguredSiteModel) element;
 				urlToCheck = new URL(configSiteModel.getPlatformURLString());
 			} catch (MalformedURLException e) {
 				String id = UpdateManagerPlugin.getPlugin().getDescriptor().getUniqueIdentifier();
 				IStatus status = new Status(IStatus.ERROR, id, IStatus.OK, Policy.bind("InstallConfiguration.UnableToCreateURL",configSiteModel.getPlatformURLString()), e); //$NON-NLS-1$
 				throw new CoreException(status);
 			} catch (ClassCastException e) {
 				String id = UpdateManagerPlugin.getPlugin().getDescriptor().getUniqueIdentifier();
 				IStatus status = new Status(IStatus.ERROR, id, IStatus.OK, Policy.bind("InstallConfiguration.UnableToCast"), e); //$NON-NLS-1$
 				throw new CoreException(status);
 			}

 			// if the URL already exist, set the policy
 			IPlatformConfiguration.ISiteEntry siteEntry = runtimeConfiguration.findConfiguredSite(urlToCheck);
 			if (siteEntry != null) {
 				siteEntry.setSitePolicy(sitePolicy);
 			} else {
 				String id = UpdateManagerPlugin.getPlugin().getDescriptor().getUniqueIdentifier();
 				IStatus status = new Status(IStatus.ERROR, id, IStatus.OK, Policy.bind("InstallConfiguration.UnableToFindConfiguredSite",urlToCheck.toExternalForm(), runtimeConfiguration.getConfigurationLocation().toExternalForm()), null); //$NON-NLS-1$
 				throw new CoreException(status);
 			}
 		}

 		try {
 			runtimeConfiguration.save();
 		} catch (IOException e) {
 			String id = UpdateManagerPlugin.getPlugin().getDescriptor().getUniqueIdentifier();
 			IStatus status = new Status(IStatus.ERROR, id, IStatus.OK, Policy.bind("InstallConfiguration.UnableToSavePlatformConfiguration", runtimeConfiguration.getConfigurationLocation().toExternalForm()), e); //$NON-NLS-1$
 			throw new CoreException(status);
 		}
 	}

 	/**
 	 *
 	 */
 	public void saveConfigurationFile() throws CoreException {
 		// save the configuration
 		if (getURL().getProtocol().equalsIgnoreCase("file")) { //$NON-NLS-1$
 			// the location points to a file
 			File file = new File(getURL().getFile());
 			export(file);
 		}
 	}
 	/*
 	 * @see IWritable#write(int, PrintWriter)
 	 */
 	public void write(int indent, PrintWriter w) {
 		String gap = ""; //$NON-NLS-1$
 		for (int i = 0; i < indent; i++)
 			gap += " "; //$NON-NLS-1$
 		String increment = ""; //$NON-NLS-1$
 		for (int i = 0; i < IWritable.INDENT; i++)
 			increment += " "; //$NON-NLS-1$
 		w.print(gap + "<" + InstallConfigurationParser.CONFIGURATION + " "); //$NON-NLS-1$ //$NON-NLS-2$
 		w.print("date=\"" + getCreationDate().getTime() + "\" "); //$NON-NLS-1$ //$NON-NLS-2$
 		w.println(">"); //$NON-NLS-1$
 		w.println(""); //$NON-NLS-1$
 		// site configurations
 		if (getConfigurationSitesModel() != null) {
 			ConfiguredSiteModel[] sites = getConfigurationSitesModel();
 			for (int i = 0; i < sites.length; i++) {
 				ConfiguredSite element = (ConfiguredSite) sites[i];
 				((IWritable) element).write(indent + IWritable.INDENT, w);
 			}
 		}
 		// activities
 		if (getActivityModel() != null) {
 			ConfigurationActivityModel[] activities = getActivityModel();
 			for (int i = 0; i < activities.length; i++) {
 				ConfigurationActivity element = (ConfigurationActivity) activities[i];
 				((IWritable) element).write(indent + IWritable.INDENT, w);
 			}
 		}
 		// end
 		w.println(gap + "</" + InstallConfigurationParser.CONFIGURATION + ">"); //$NON-NLS-1$ //$NON-NLS-2$
 	}
 	/**
 	 * reverts this configuration to the match the new one
 	 *
 	 * remove any site that are in the current but not in the old state
 	 *
 	 * replace all the config sites of the current state with the old one
 	 *
 	 * for all the sites left in the current state, calculate the revert
 	 *
 	 */
 	public void revertTo(IInstallConfiguration configuration, IProgressMonitor monitor, IProblemHandler handler) throws CoreException, InterruptedException {

 		IConfiguredSite[] oldConfigSites = configuration.getConfiguredSites();
 		IConfiguredSite[] nowConfigSites = this.getConfiguredSites();

 		// create a hashtable of the *old* sites
 		Map oldSitesMap = new Hashtable(0);
 		for (int i = 0; i < oldConfigSites.length; i++) {
 			IConfiguredSite element = oldConfigSites[i];
 			oldSitesMap.put(element.getSite().getURL().toExternalForm(), element);
 		}
 		// create list of all the sites that map the *old* sites
 		// we want the intersection between the old sites and the current sites
 		if (nowConfigSites != null) {
 			// for each current site, ask the old site
 			// to calculate the delta
 			String key = null;
 			for (int i = 0; i < nowConfigSites.length; i++) {
 				key = nowConfigSites[i].getSite().getURL().toExternalForm();
 				IConfiguredSite oldSite = (IConfiguredSite) oldSitesMap.get(key);
 				if (oldSite != null) {
 					// the Site existed before, calculate teh delta between its current state and the
 					// state we are reverting to
 					 ((ConfiguredSite) oldSite).deltaWith(nowConfigSites[i], monitor, handler);
 					nowConfigSites[i] = oldSite;
 				} else {
 					// the site didn't exist in the InstallConfiguration we are reverting to
 					// unconfigure everything from this site so it is still present
 					IFeatureReference[] featuresToUnconfigure = nowConfigSites[i].getSite().getFeatureReferences();
 					for (int j = 0; j < featuresToUnconfigure.length; j++) {
 						nowConfigSites[i].unconfigure(featuresToUnconfigure[j].getFeature(), null);
 					}
 				}
 			}
 			// the new configuration has the exact same sites as the old configuration
 			// the old configuration in the Map are either as-is because they don't exist
 			// in the current one, or they are the delta from the current one to the old one
 			Collection sites = oldSitesMap.values();
 			if (sites != null && !sites.isEmpty()) {
 				ConfiguredSiteModel[] sitesModel = new ConfiguredSiteModel[sites.size()];
 				sites.toArray(sitesModel);
 				setConfigurationSiteModel(sitesModel);
 			}
 		}
 	}
 	/*
 	* @see IAdaptable#getAdapter(Class)
 	*/
 	public Object getAdapter(Class adapter) {
 		return null;
 	}

 	/*
 	 * @see IInstallConfiguration#getActivities()
 	 */
 	public IActivity[] getActivities() {
 		if (getActivityModel().length == 0)
 			return new IActivity[0];
 		return (IActivity[]) getActivityModel();
 	}

 }
	package org.eclipse.update.internal.core;
	/*
	* (c) Copyright IBM Corp. 2000, 2001.
	* All Rights Reserved.
	*/
	import java.io.*;
	import java.net.MalformedURLException;
	import java.net.URL;
	import java.util.*;

	import org.eclipse.core.boot.BootLoader;
	import org.eclipse.core.boot.IPlatformConfiguration;
	import org.eclipse.core.runtime.*;
	import org.eclipse.update.configuration.*;
	import org.eclipse.update.core.IFeatureReference;
	import org.eclipse.update.internal.model.*;

	/**
	* An InstallConfigurationModel is
	*
	*/

	public class InstallConfiguration extends InstallConfigurationModel implements IInstallConfiguration, IWritable {

	private ListenersList listeners = new ListenersList();

	public InstallConfiguration() {
	}

	/**
	* default constructor. Create
	*/
	public InstallConfiguration(URL newLocation, String label) throws MalformedURLException {
	setLocationURLString(newLocation.toExternalForm());
	setLabel(label);
	setCurrent(false);
	resolve(newLocation, null);
	}

	/*
	* copy constructor
	*/
	public InstallConfiguration(IInstallConfiguration config, URL newLocation, String label) throws MalformedURLException {
	setLocationURLString(newLocation.toExternalForm());
	setLabel(label);
	// do not copy list of listeners nor activities
	// ake a copy of the siteConfiguration object
	if (config != null) {
	IConfiguredSite[] sites = config.getConfiguredSites();
	if (sites != null) {
	for (int i = 0; i < sites.length; i++) {
	ConfiguredSite configSite = new ConfiguredSite(sites[i]);
	addConfigurationSiteModel(configSite);
	}
	}
	}
	// set dummy date as caller can call set date if the
	// date on the URL string has to be the same
	setCreationDate(new Date());
	setCurrent(false);
	resolve(newLocation, null);
	}

	/**
	*
	*/
	public IConfiguredSite[] getConfiguredSites() {
	ConfiguredSiteModel[] result = getConfigurationSitesModel();
	if (result.length == 0)
	return new IConfiguredSite[0];
	else
	return (IConfiguredSite[]) result;
	}

	/**
	*
	*/
	public void addConfiguredSite(IConfiguredSite site) {
	if (!isCurrent() && isReadOnly())
	return;

	//Start UOW ?
	ConfigurationActivity activity = new ConfigurationActivity(IActivity.ACTION_SITE_INSTALL);
	activity.setLabel(site.getSite().getURL().toExternalForm());
	activity.setDate(new Date());
	ConfiguredSiteModel configSiteModel = (ConfiguredSiteModel) site;
	addConfigurationSiteModel(configSiteModel);
	configSiteModel.setInstallConfigurationModel(this);
	// notify listeners
	Object[] configurationListeners = listeners.getListeners();
	for (int i = 0; i < configurationListeners.length; i++) {
	((IInstallConfigurationChangedListener) configurationListeners[i]).installSiteAdded(site);
	}
	// everything done ok
	activity.setStatus(IActivity.STATUS_OK);
	this.addActivityModel((ConfigurationActivityModel) activity);
	}

	/**
	* add multiple sites in one activity
	*/
	public void setConfigurationSites(IConfiguredSite[] site) {
	if (!isCurrent() && isReadOnly())
	return;

	if (site == null)
	return;

	for (int index = 0; index < site.length; index++) {
	addConfiguredSite(site[index]);
	}

	}

	/**
	*
	*/
	public void removeConfiguredSite(IConfiguredSite site) {

	if (removeConfigurationSiteModel((ConfiguredSiteModel) site)) { // notify listeners
	Object[] configurationListeners = listeners.getListeners();
	for (int i = 0; i < configurationListeners.length; i++) {
	((IInstallConfigurationChangedListener) configurationListeners[i]).installSiteRemoved(site);
	}

	//activity
	ConfigurationActivity activity = new ConfigurationActivity(IActivity.ACTION_SITE_REMOVE);
	activity.setLabel(site.getSite().getURL().toExternalForm());
	activity.setDate(new Date());
	activity.setStatus(IActivity.STATUS_OK);
	this.addActivityModel((ConfigurationActivityModel) activity);

	}
	}

	/*
	* @see IInstallConfiguration#addInstallConfigurationChangedListener(IInstallConfigurationChangedListener)
	*/
	public void addInstallConfigurationChangedListener(IInstallConfigurationChangedListener listener) {
	synchronized (listeners) {
	listeners.add(listener);
	}
	}
	/*
	* @see IInstallConfiguration#removeInstallConfigurationChangedListener(IInstallConfigurationChangedListener)
	*/
	public void removeInstallConfigurationChangedListener(IInstallConfigurationChangedListener listener) {
	synchronized (listeners) {
	listeners.remove(listener);
	}
	}
	/*
	* @see IInstallConfiguration#export(File)
	*/
	public void export(File exportFile) throws CoreException {
	try {
	PrintWriter fileWriter = new PrintWriter(new FileOutputStream(exportFile));
	Writer writer = new Writer();
	writer.writeSite(this, fileWriter);
	fileWriter.close();
	} catch (FileNotFoundException e) {
	String id = UpdateManagerPlugin.getPlugin().getDescriptor().getUniqueIdentifier();
	IStatus status = new Status(IStatus.ERROR, id, IStatus.OK, Policy.bind("InstallConfiguration.UnableToSaveConfiguration", exportFile.getAbsolutePath()), e); //$NON-NLS-1$
	throw new CoreException(status);
	}
	}
	/**
	* Deletes the configuration from its URL/location
	*/
	public void remove() {
	// save the configuration
	if (getURL().getProtocol().equalsIgnoreCase("file")) { //$NON-NLS-1$
	// the location points to a file
	File file = new File(getURL().getFile());
	UpdateManagerUtils.removeFromFileSystem(file);
	}
	}
	/**
	* Saves the configuration into its URL/location
	*/
	public void save() throws CoreException {

	// save the configuration.xml file
	saveConfigurationFile();

	// Write info into platform for the next runtime
	IPlatformConfiguration runtimeConfiguration = BootLoader.getCurrentPlatformConfiguration();
	ConfiguredSiteModel[] configurationSites = getConfigurationSitesModel();

	for (int i = 0; i < configurationSites.length; i++) {
	IConfiguredSite element = (IConfiguredSite) configurationSites[i];
	ConfigurationPolicy configurationPolicy = ((ConfiguredSite) element).getConfigurationPolicy();

	// obtain the list of plugins
	ConfiguredSite cSite = ((ConfiguredSite) element);
	String[] pluginPath = configurationPolicy.getPluginPath(element.getSite(), cSite.getPreviousPluginPath());

	IPlatformConfiguration.ISitePolicy sitePolicy = runtimeConfiguration.createSitePolicy(configurationPolicy.getPolicy(), pluginPath);

	// determine the URL to check
	URL urlToCheck = null;
	ConfiguredSiteModel configSiteModel = null;
	try {
	configSiteModel = (ConfiguredSiteModel) element;
	urlToCheck = new URL(configSiteModel.getPlatformURLString());
	} catch (MalformedURLException e) {
	String id = UpdateManagerPlugin.getPlugin().getDescriptor().getUniqueIdentifier();
	IStatus status = new Status(IStatus.ERROR, id, IStatus.OK, Policy.bind("InstallConfiguration.UnableToCreateURL",configSiteModel.getPlatformURLString()), e); //$NON-NLS-1$
	throw new CoreException(status);
	} catch (ClassCastException e) {
	String id = UpdateManagerPlugin.getPlugin().getDescriptor().getUniqueIdentifier();
	IStatus status = new Status(IStatus.ERROR, id, IStatus.OK, Policy.bind("InstallConfiguration.UnableToCast"), e); //$NON-NLS-1$
	throw new CoreException(status);
	}

	// if the URL already exist, set the policy
	IPlatformConfiguration.ISiteEntry siteEntry = runtimeConfiguration.findConfiguredSite(urlToCheck);
	if (siteEntry != null) {
	siteEntry.setSitePolicy(sitePolicy);
	} else {
	String id = UpdateManagerPlugin.getPlugin().getDescriptor().getUniqueIdentifier();
	IStatus status = new Status(IStatus.ERROR, id, IStatus.OK, Policy.bind("InstallConfiguration.UnableToFindConfiguredSite",urlToCheck.toExternalForm(), runtimeConfiguration.getConfigurationLocation().toExternalForm()), null); //$NON-NLS-1$
	throw new CoreException(status);
	}
	}

	try {
	runtimeConfiguration.save();
	} catch (IOException e) {
	String id = UpdateManagerPlugin.getPlugin().getDescriptor().getUniqueIdentifier();
	IStatus status = new Status(IStatus.ERROR, id, IStatus.OK, Policy.bind("InstallConfiguration.UnableToSavePlatformConfiguration", runtimeConfiguration.getConfigurationLocation().toExternalForm()), e); //$NON-NLS-1$
	throw new CoreException(status);
	}
	}

	/**
	*
	*/
	public void saveConfigurationFile() throws CoreException {
	// save the configuration
	if (getURL().getProtocol().equalsIgnoreCase("file")) { //$NON-NLS-1$
	// the location points to a file
	File file = new File(getURL().getFile());
	export(file);
	}
	}
	/*
	* @see IWritable#write(int, PrintWriter)
	*/
	public void write(int indent, PrintWriter w) {
	String gap = ""; //$NON-NLS-1$
	for (int i = 0; i < indent; i++)
	gap += " "; //$NON-NLS-1$
	String increment = ""; //$NON-NLS-1$
	for (int i = 0; i < IWritable.INDENT; i++)
	increment += " "; //$NON-NLS-1$
	w.print(gap + "<" + InstallConfigurationParser.CONFIGURATION + " "); //$NON-NLS-1$ //$NON-NLS-2$
	w.print("date=\"" + getCreationDate().getTime() + "\" "); //$NON-NLS-1$ //$NON-NLS-2$
	w.println(">"); //$NON-NLS-1$
	w.println(""); //$NON-NLS-1$
	// site configurations
	if (getConfigurationSitesModel() != null) {
	ConfiguredSiteModel[] sites = getConfigurationSitesModel();
	for (int i = 0; i < sites.length; i++) {
	ConfiguredSite element = (ConfiguredSite) sites[i];
	((IWritable) element).write(indent + IWritable.INDENT, w);
	}
	}
	// activities
	if (getActivityModel() != null) {
	ConfigurationActivityModel[] activities = getActivityModel();
	for (int i = 0; i < activities.length; i++) {
	ConfigurationActivity element = (ConfigurationActivity) activities[i];
	((IWritable) element).write(indent + IWritable.INDENT, w);
	}
	}
	// end
	w.println(gap + "</" + InstallConfigurationParser.CONFIGURATION + ">"); //$NON-NLS-1$ //$NON-NLS-2$
	}
	/**
	* reverts this configuration to the match the new one
	*
	* remove any site that are in the current but not in the old state
	*
	* replace all the config sites of the current state with the old one
	*
	* for all the sites left in the current state, calculate the revert
	*
	*/
	public void revertTo(IInstallConfiguration configuration, IProgressMonitor monitor, IProblemHandler handler) throws CoreException, InterruptedException {

	IConfiguredSite[] oldConfigSites = configuration.getConfiguredSites();
	IConfiguredSite[] nowConfigSites = this.getConfiguredSites();

	// create a hashtable of the old sites
	Map oldSitesMap = new Hashtable(0);
	for (int i = 0; i < oldConfigSites.length; i++) {
	IConfiguredSite element = oldConfigSites[i];
	oldSitesMap.put(element.getSite().getURL().toExternalForm(), element);
	}
	// create list of all the sites that map the old sites
	// we want the intersection between the old sites and the current sites
	if (nowConfigSites != null) {
	// for each current site, ask the old site
	// to calculate the delta
	String key = null;
	for (int i = 0; i < nowConfigSites.length; i++) {
	key = nowConfigSites[i].getSite().getURL().toExternalForm();
	IConfiguredSite oldSite = (IConfiguredSite) oldSitesMap.get(key);
	if (oldSite != null) {
	// the Site existed before, calculate teh delta between its current state and the
	// state we are reverting to
	((ConfiguredSite) oldSite).deltaWith(nowConfigSites[i], monitor, handler);
	nowConfigSites[i] = oldSite;
	} else {
	// the site didn't exist in the InstallConfiguration we are reverting to
	// unconfigure everything from this site so it is still present
	IFeatureReference[] featuresToUnconfigure = nowConfigSites[i].getSite().getFeatureReferences();
	for (int j = 0; j < featuresToUnconfigure.length; j++) {
	nowConfigSites[i].unconfigure(featuresToUnconfigure[j].getFeature(), null);
	}
	}
	}
	// the new configuration has the exact same sites as the old configuration
	// the old configuration in the Map are either as-is because they don't exist
	// in the current one, or they are the delta from the current one to the old one
	Collection sites = oldSitesMap.values();
	if (sites != null && !sites.isEmpty()) {
	ConfiguredSiteModel[] sitesModel = new ConfiguredSiteModel[sites.size()];
	sites.toArray(sitesModel);
	setConfigurationSiteModel(sitesModel);
	}
	}
	}
	/*
	* @see IAdaptable#getAdapter(Class)
	*/
	public Object getAdapter(Class adapter) {
	return null;
	}

	/*
	* @see IInstallConfiguration#getActivities()
	*/
	public IActivity[] getActivities() {
	if (getActivityModel().length == 0)
	return new IActivity[0];
	return (IActivity[]) getActivityModel();
	}

	}