| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.update.internal.core; |
| |
| import java.io.*; |
| import java.util.*; |
| |
| import org.eclipse.core.boot.*; |
| |
| /** |
| * Keeps track of all the features and plugins installed by Update mgr. |
| */ |
| public class InstallRegistry extends Properties { |
| private File file = null; |
| private final static String REGISTRY = "registry"; |
| private static InstallRegistry instance; |
| /** |
| * Creates empty Properties. |
| * @param name name of the table; |
| */ |
| private InstallRegistry() { |
| super(); |
| String configFile = |
| BootLoader |
| .getCurrentPlatformConfiguration() |
| .getConfigurationLocation() |
| .getFile(); |
| file = new File(configFile); |
| file = file.getParentFile(); |
| file = new File(file, REGISTRY); |
| restore(); |
| } |
| |
| /** |
| * Singleton |
| */ |
| public static InstallRegistry getInstance() { |
| if (instance == null) |
| instance = new InstallRegistry(); |
| return instance; |
| } |
| |
| /** |
| * Restores contents of the Properties from a file. |
| * @return true if persistant data was read in |
| */ |
| public boolean restore() { |
| InputStream in = null; |
| boolean loaded = false; |
| clear(); |
| // Test if we have a contribution file to start with |
| // If this is a clean start, then we will not have a |
| // contribution file. return false. |
| if (!file.exists()) |
| return loaded; |
| try { |
| in = new FileInputStream(file); |
| super.load(in); |
| loaded = true; |
| } catch (IOException e) { |
| UpdateCore.log(e); |
| } finally { |
| if (in != null) |
| try { |
| in.close(); |
| } catch (IOException e) { |
| } |
| } |
| return loaded; |
| } |
| /** |
| * Saves contents of the table to a file. |
| * @return true if operation was successful |
| */ |
| public synchronized boolean save() { |
| OutputStream out = null; |
| boolean ret = false; |
| try { |
| out = new FileOutputStream(file); |
| super.store(out, "This is a generated file; do not edit."); |
| ret = true; |
| } catch (IOException e) { |
| UpdateCore.log(e); |
| } finally { |
| try { |
| if (out != null) { |
| out.close(); |
| } |
| } catch (IOException e) { |
| } |
| } |
| return ret; |
| } |
| |
| /** |
| * Registers an installed feature or plugin so it can be uninstalled later. |
| * @param name: For feature this is feature_<id>_<version> and for plugins |
| * it is plugin_<id>_<version>. Eg: feature_org.eclipse.platform_3.0.0 |
| */ |
| public static synchronized void register(String name) { |
| if (InstallRegistry.getInstance().get(name) == null) { |
| InstallRegistry.getInstance().put(name, name); |
| // we save after each registration |
| InstallRegistry.getInstance().save(); |
| } |
| } |
| |
| /** |
| * Removes specified name from registry |
| * |
| */ |
| public static synchronized void unregister(String name) { |
| InstallRegistry.getInstance().remove(name); |
| } |
| } |