| /******************************************************************************* |
| * Copyright (c) 2013, 2017 SAP AG 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: |
| * Lazar Kirchev, SAP AG - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.equinox.console.commands; |
| |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.apache.felix.service.command.CommandProcessor; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.Filter; |
| import org.osgi.framework.InvalidSyntaxException; |
| import org.osgi.framework.ServiceReference; |
| import org.osgi.util.tracker.ServiceTracker; |
| import org.osgi.util.tracker.ServiceTrackerCustomizer; |
| |
| public class CommandsTracker { |
| private Set<String> commandNames; |
| private ServiceTracker<Object, Set<String>> commandsTracker = null; |
| private static final Object lock = new Object(); |
| |
| public CommandsTracker(BundleContext bundleContext) { |
| commandNames = Collections.synchronizedSet(new HashSet<String>()); |
| try { |
| Filter filter = bundleContext.createFilter(String.format("(&(%s=*)(%s=*))", CommandProcessor.COMMAND_SCOPE, CommandProcessor.COMMAND_FUNCTION)); |
| commandsTracker = new ServiceTracker<>(bundleContext, filter, new CommandsTrackerCustomizer()); |
| commandsTracker.open(); |
| } catch (InvalidSyntaxException e) { |
| //do nothing; |
| } |
| } |
| |
| public Set<String> getCommands() { |
| synchronized (lock) { |
| return new HashSet<>(commandNames); |
| } |
| } |
| |
| class CommandsTrackerCustomizer implements ServiceTrackerCustomizer<Object, Set<String>> { |
| @Override |
| public Set<String> addingService(ServiceReference<Object> reference) { |
| Object scope = reference.getProperty(CommandProcessor.COMMAND_SCOPE); |
| Object function = reference.getProperty(CommandProcessor.COMMAND_FUNCTION); |
| |
| if (scope != null && function != null) { |
| synchronized (lock) { |
| if (function.getClass().isArray()) { |
| for (Object func : ((Object[]) function)) { |
| commandNames.add(scope.toString() + ":" + func.toString()); |
| } |
| } else { |
| commandNames.add(scope.toString() + ":" + function.toString()); |
| } |
| return commandNames; |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| public void modifiedService(ServiceReference<Object> reference, Set<String> commandNames) { |
| // nothing to do |
| } |
| |
| @Override |
| public void removedService(ServiceReference<Object> reference, Set<String> commandNames) { |
| Object scope = reference.getProperty(CommandProcessor.COMMAND_SCOPE); |
| Object function = reference.getProperty(CommandProcessor.COMMAND_FUNCTION); |
| |
| if (scope != null && function != null) { |
| if (!function.getClass().isArray()) { |
| commandNames.remove(scope.toString() + ":" + function.toString()); |
| } else { |
| for (Object func : (Object[]) function) { |
| commandNames.remove(scope.toString() + ":" + func.toString()); |
| } |
| } |
| } |
| } |
| |
| } |
| } |