| /******************************************************************************* |
| * Copyright (c) 2007, 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.equinox.internal.p2.reconciler.dropins; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.util.*; |
| import org.eclipse.core.runtime.FileLocator; |
| import org.eclipse.equinox.internal.p2.reconciler.dropins.SiteDelta.Change; |
| import org.eclipse.equinox.internal.p2.update.*; |
| import org.eclipse.equinox.internal.provisional.p2.core.ProvisionException; |
| import org.eclipse.equinox.internal.provisional.p2.directorywatcher.DirectoryChangeListener; |
| import org.eclipse.equinox.internal.provisional.p2.metadata.repository.IMetadataRepository; |
| |
| /** |
| * @since 1.0 |
| */ |
| public class PlatformXmlListener extends DirectoryChangeListener { |
| |
| private static final String PLATFORM_XML = "platform.xml"; //$NON-NLS-1$ |
| private boolean changed = false; |
| private Map sites = new HashMap(); |
| private File root; |
| private long lastModified = -1l; |
| |
| public PlatformXmlListener(File file) throws ProvisionException { |
| super(); |
| if (!PLATFORM_XML.equals(file.getName())) |
| throw new IllegalArgumentException(); |
| this.root = file; |
| // don't need to set the "sites" variable since we will treat |
| // everything as "added" in the delta if it is null |
| process(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.equinox.internal.provisional.p2.directorywatcher.IDirectoryChangeListener#added(java.io.File) |
| */ |
| public boolean added(File file) { |
| changed = changed || PLATFORM_XML.equals(file.getName()); |
| return false; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.equinox.internal.provisional.p2.directorywatcher.IDirectoryChangeListener#changed(java.io.File) |
| */ |
| public boolean changed(File file) { |
| changed = changed || PLATFORM_XML.equals(file.getName()); |
| return false; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.equinox.internal.provisional.p2.directorywatcher.IDirectoryChangeListener#getSeenFile(java.io.File) |
| */ |
| public Long getSeenFile(File file) { |
| return new Long(0); |
| } |
| |
| /* |
| * Parse the platform.xml file and return the list of sites. |
| */ |
| private List parseConfiguration() throws ProvisionException { |
| Configuration cfg = ConfigurationParser.parse(root, (URL) null); |
| return cfg == null ? new ArrayList(0) : cfg.getSites(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.equinox.internal.provisional.p2.directorywatcher.DirectoryChangeListener#isInterested(java.io.File) |
| */ |
| public boolean isInterested(File file) { |
| return file.getName().equals(PLATFORM_XML) && lastModified != file.lastModified(); |
| } |
| |
| private List getSites() { |
| List result = new ArrayList(); |
| for (Iterator iter = sites.values().iterator(); iter.hasNext();) { |
| SiteInfo info = (SiteInfo) iter.next(); |
| result.add(info.getSite()); |
| } |
| return result; |
| } |
| |
| /* |
| * This is where we reconcile the platform.xml and bundles.info. |
| */ |
| private void process() throws ProvisionException { |
| lastModified = root.lastModified(); |
| SiteDelta delta = SiteDelta.create(getSites(), parseConfiguration()); |
| if (delta.isEmpty()) |
| return; |
| added(delta.added()); |
| removed(delta.removed()); |
| changed(delta.changed()); |
| //Activator.synchronize(getMetadataRepositories(), null); // TODO proper progress monitoring? |
| } |
| |
| // iterate over the site listeners and collect the metadata repositories |
| public List getMetadataRepositories() { |
| List result = new ArrayList(); |
| for (Iterator iter = sites.values().iterator(); iter.hasNext();) { |
| SiteInfo info = (SiteInfo) iter.next(); |
| result.add(info.getRepository()); |
| } |
| return result; |
| } |
| |
| /* |
| * The given list of sites has been added so add directory |
| * watchers for each of them. |
| */ |
| private void added(Site[] added) throws ProvisionException { |
| if (added == null || added.length == 0) |
| return; |
| for (int i = 0; i < added.length; i++) { |
| Site site = added[i]; |
| // TODO skip for now |
| if ("platform:/base/".equals(site.getUrl())) //$NON-NLS-1$ |
| continue; |
| try { |
| URL url = new URL(site.getUrl()); |
| try { |
| url = FileLocator.resolve(url); |
| } catch (IOException e) { |
| throw new ProvisionException(Messages.errorProcessingConfg, e); |
| } |
| IMetadataRepository repo = Activator.loadMetadataRepository(url); |
| if (repo == null) { |
| // todo |
| } else |
| sites.put(site.getUrl(), new SiteInfo(site, repo)); |
| } catch (MalformedURLException e) { |
| throw new ProvisionException(Messages.errorProcessingConfg, e); |
| } |
| } |
| } |
| |
| /* |
| * The given list of sites has been removed so act accordingly. |
| * Remove all the registered directory watchers. |
| */ |
| private void removed(Site[] removed) { |
| if (removed == null || removed.length == 0) |
| return; |
| for (int i = 0; i < removed.length; i++) { |
| Site site = removed[i]; |
| SiteInfo info = (SiteInfo) sites.get(site.getUrl()); |
| // TODO I think this should be an error? |
| if (info == null) { |
| // |
| } |
| |
| sites.remove(site.getUrl()); |
| } |
| } |
| |
| /* |
| * The given set of sites has had their contents changed. |
| */ |
| private void changed(Change[] changes) throws ProvisionException { |
| for (int i = 0; i < changes.length; i++) { |
| Change change = changes[i]; |
| if (majorChange(change)) { |
| removed(new Site[] {change.oldSite}); |
| added(new Site[] {change.newSite}); |
| } |
| } |
| } |
| |
| /* |
| * Return true if the differences between the 2 sites should cause |
| * a new listener to be created. |
| */ |
| private boolean majorChange(Change change) { |
| Site one = change.oldSite; |
| Site two = change.newSite; |
| if (!Utils.equals(one.getPolicy(), two.getPolicy())) |
| return true; |
| return !Utils.equals(one.getList(), two.getList()); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.equinox.internal.provisional.p2.directorywatcher.IDirectoryChangeListener#removed(java.io.File) |
| */ |
| public boolean removed(File file) { |
| changed = changed || PLATFORM_XML.equals(file.getName()); |
| return false; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.equinox.internal.provisional.p2.directorywatcher.IDirectoryChangeListener#startPoll() |
| */ |
| public void startPoll() { |
| changed = false; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.equinox.internal.provisional.p2.directorywatcher.IDirectoryChangeListener#stopPoll() |
| */ |
| public void stopPoll() { |
| if (changed) |
| try { |
| process(); |
| } catch (ProvisionException e) { |
| e.printStackTrace(); |
| } |
| changed = false; |
| } |
| |
| } |