Java tutorial
/******************************************************************************* * Copyright (c) 2011 Sonatype, Inc. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Sonatype, Inc. - initial API and implementation *******************************************************************************/ package org.eclipse.m2e.internal.discovery.startup; import java.util.ArrayList; import java.util.Collection; import java.util.HashSet; import java.util.List; import java.util.Set; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.IResource; import org.eclipse.core.resources.IWorkspaceRoot; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.MultiStatus; import org.eclipse.jface.preference.IPreferenceStore; import org.eclipse.ui.IStartup; import org.eclipse.ui.internal.IPreferenceConstants; import org.eclipse.ui.internal.Workbench; import org.eclipse.ui.internal.util.PrefUtil; import org.eclipse.ui.statushandlers.StatusManager; import org.eclipse.m2e.core.internal.IMavenConstants; import org.eclipse.m2e.core.ui.internal.UpdateMavenProjectJob; import org.eclipse.m2e.internal.discovery.DiscoveryActivator; import org.eclipse.m2e.internal.discovery.Messages; @SuppressWarnings("restriction") public class UpdateConfigurationStartup implements IStartup { private static final String PROJECT_PREF = DiscoveryActivator.PLUGIN_ID + ".pref.projects"; //$NON-NLS-1$ public void earlyStartup() { IProject[] projects = getSavedProjects(); if (projects != null && projects.length > 0) { updateConfiguration(projects); } disableStartup(); } /* * Enables the early startup for this bundle */ public static void enableStartup() { saveMarkedProjects(); addEarlyStartup(); } /* * Enable early startup for this bundle, also add the list of projects to those that should be configured */ public static void enableStartup(Collection<String> knownProjects) { if (knownProjects != null) { Set<String> projects = new HashSet<String>(knownProjects); for (IProject project : getMarkedProjects()) { projects.add(project.getName()); } saveProjects(projects); } else { saveMarkedProjects(); } addEarlyStartup(); } /* * Disables the early startup for this bundle */ public static void disableStartup() { clearSavedProjects(); removeEarlyStartup(); } /* * Configure projects */ public static void updateConfiguration() { Collection<IProject> projects = getMarkedProjects(); new UpdateMavenProjectJob(projects.toArray(new IProject[projects.size()])).schedule(); } private static void updateConfiguration(IProject[] projects) { new UpdateMavenProjectJob(projects).schedule(); } private static void addEarlyStartup() { String[] disabledEarlyActivation = Workbench.getInstance().getDisabledEarlyActivatedPlugins(); // If we aren't disabled, nothing to do if (!isDisabled(disabledEarlyActivation)) { return; } String[] disabledPlugins = new String[disabledEarlyActivation.length - 1]; int index = 0; for (String plugin : disabledEarlyActivation) { if (!DiscoveryActivator.PLUGIN_ID.equals(plugin)) { disabledPlugins[index] = plugin; } } setEarlyActivationPreference(disabledPlugins); } private static void removeEarlyStartup() { String[] disabledEarlyActivation = Workbench.getInstance().getDisabledEarlyActivatedPlugins(); // Determine if we're already disabled if (isDisabled(disabledEarlyActivation)) { return; } String[] disabledPlugins = new String[disabledEarlyActivation.length + 1]; System.arraycopy(disabledEarlyActivation, 0, disabledPlugins, 0, disabledEarlyActivation.length); disabledPlugins[disabledPlugins.length - 1] = DiscoveryActivator.PLUGIN_ID; setEarlyActivationPreference(disabledPlugins); } private static boolean isDisabled(String[] disabledEarlyActivation) { for (String item : disabledEarlyActivation) { if (DiscoveryActivator.PLUGIN_ID.equals(item)) { return true; } } return false; } private static void setEarlyActivationPreference(String[] disabledPlugins) {// Add ourself to disabled StringBuffer preference = new StringBuffer(); for (String item : disabledPlugins) { preference.append(item).append(IPreferenceConstants.SEPARATOR); } IPreferenceStore store = PrefUtil.getInternalPreferenceStore(); store.putValue(IPreferenceConstants.PLUGINS_NOT_ACTIVATED_ON_STARTUP, preference.toString()); PrefUtil.savePrefs(); } /* * Get projects we saved previously */ public static IProject[] getSavedProjects() { String[] projectNames = DiscoveryActivator.getDefault().getPreferenceStore().getString(PROJECT_PREF) .split(String.valueOf(IPreferenceConstants.SEPARATOR)); List<IProject> projects = new ArrayList<IProject>(projectNames.length); IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot(); for (String projectName : projectNames) { if (projectName.length() > 0) { IProject project = root.getProject(projectName); if (project != null) { projects.add(project); } } } return projects.toArray(new IProject[projects.size()]); } /* * Save a list of projects which have configuration markers */ public static void saveMarkedProjects() { StringBuilder sb = new StringBuilder(); for (IProject project : getMarkedProjects()) { sb.append(project.getName()).append(IPreferenceConstants.SEPARATOR); } DiscoveryActivator.getDefault().getPreferenceStore().putValue(PROJECT_PREF, sb.toString()); } /* * Save a list of projects which have configuration markers */ public static void saveProjects(Collection<String> projects) { StringBuilder sb = new StringBuilder(); for (String project : projects) { sb.append(project).append(IPreferenceConstants.SEPARATOR); } DiscoveryActivator.getDefault().getPreferenceStore().putValue(PROJECT_PREF, sb.toString()); } private static Collection<IProject> getMarkedProjects() { List<IProject> projects = new ArrayList<IProject>(); MultiStatus status = new MultiStatus(DiscoveryActivator.PLUGIN_ID, 0, Messages.UpdateConfigurationStartup_MarkerError, null); for (IProject project : ResourcesPlugin.getWorkspace().getRoot().getProjects()) { try { if (project.findMarkers(IMavenConstants.MARKER_LIFECYCLEMAPPING_ID, true, IResource.DEPTH_ONE).length > 0) { projects.add(project); } } catch (CoreException e) { status.add(e.getStatus()); } } if (status.getChildren().length > 0) { StatusManager.getManager().handle(status); } return projects; } /* * Empty the list of saved projects */ public static void clearSavedProjects() { DiscoveryActivator.getDefault().getPreferenceStore().putValue(PROJECT_PREF, ""); //$NON-NLS-1$ } }