Copyright (c) 2000, 2018 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2000, 2018 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.team.internal.core;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.core.runtime.SubMonitor;
import org.eclipse.osgi.service.debug.DebugOptionsListener;

public class Policy {

	//debug constants
	public static boolean DEBUG = false;
	public static boolean DEBUG_STREAMS = false;
	public static boolean DEBUG_REFRESH_JOB = true;
	public static boolean DEBUG_BACKGROUND_EVENTS = false;
	public static boolean DEBUG_THREADING = false;

	static final DebugOptionsListener DEBUG_OPTIONS_LISTENER = options -> {
		DEBUG = options.getBooleanOption(TeamPlugin.ID + "/debug", false); //$NON-NLS-1$
		DEBUG_STREAMS = DEBUG && options.getBooleanOption(TeamPlugin.ID + "/streams", false); //$NON-NLS-1$
		DEBUG_REFRESH_JOB = DEBUG && options.getBooleanOption(TeamPlugin.ID + "/refreshjob", false); //$NON-NLS-1$
		DEBUG_BACKGROUND_EVENTS = DEBUG && options.getBooleanOption(TeamPlugin.ID + "/backgroundevents", false); //$NON-NLS-1$
		DEBUG_THREADING = DEBUG && options.getBooleanOption(TeamPlugin.ID + "/threading", false); //$NON-NLS-1$
	};

	
Progress monitor helpers.
Params:
monitor – the progress monitor/**
	 * Progress monitor helpers.
	 *
	 * @param monitor the progress monitor
	 */
	public static void checkCanceled(IProgressMonitor monitor) {
		if (monitor != null && monitor.isCanceled())
			throw new OperationCanceledException();
	}
	public static IProgressMonitor monitorFor(IProgressMonitor monitor) {
		if (monitor == null)
			return new NullProgressMonitor();
		return monitor;
	}

	public static IProgressMonitor subMonitorFor(IProgressMonitor monitor, int ticks) {
		if (monitor == null)
			return new NullProgressMonitor();
		if (monitor instanceof NullProgressMonitor)
			return monitor;
		return SubMonitor.convert(monitor, ticks);
	}

	public static IProgressMonitor infiniteSubMonitorFor(IProgressMonitor monitor, int ticks) {
		if (monitor == null)
			return new NullProgressMonitor();
		if (monitor instanceof NullProgressMonitor)
			return monitor;
		return new InfiniteSubProgressMonitor(monitor, ticks);
	}
}