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/*******************************************************************************
* 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());
}
}
}
}
}
}
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