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Mongoose is a high-load storage performance testing tool

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package com.emc.mongoose.base.config;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/** Created by andrey on 07.04.15. */
public abstract class TimeUtil {

	private static final Map TIME_UNIT_SHORTCUTS = new HashMap() {
		{
			put("s", TimeUnit.SECONDS);
			put("m", TimeUnit.MINUTES);
			put("h", TimeUnit.HOURS);
			put("d", TimeUnit.DAYS);
		}
	};
	private static final Pattern PATTERN_TIME = Pattern.compile("([0-9]*)([smhdSMHD]?)");
	private static final Pattern PATTERN_TIME_COMPAT = Pattern.compile("([0-9]*)\\.([a-zA-Z]{4,7})");

	public static long getTimeValue(final String rawValue) throws IllegalArgumentException {

		final String timeValueSpec;
		Matcher m = PATTERN_TIME.matcher(rawValue);

		if (m.matches()) {
			timeValueSpec = m.group(1);
		} else {
			m = PATTERN_TIME_COMPAT.matcher(rawValue);
			if (m.matches()) {
				timeValueSpec = m.group(1);
			} else {
				throw new IllegalArgumentException(
								String.format(
												"Time value \"%s\" doesn't match the pattern \"%s\"",
												rawValue, PATTERN_TIME.pattern()));
			}
		}

		try {
			return Long.parseLong(timeValueSpec);
		} catch (final NumberFormatException e) {
			return 0;
		}
	}

	public static TimeUnit getTimeUnit(final String rawValue) {

		TimeUnit result = TimeUnit.SECONDS;
		Matcher m = PATTERN_TIME.matcher(rawValue);

		if (m.matches()) {
			final String t = m.group(2).toLowerCase();
			if (TIME_UNIT_SHORTCUTS.containsKey(t)) {
				result = TIME_UNIT_SHORTCUTS.get(t);
			}
		} else {
			m = PATTERN_TIME_COMPAT.matcher(rawValue);
			if (m.matches()) {
				result = TimeUnit.valueOf(m.group(2).toUpperCase());
			} else {
				throw new IllegalArgumentException(
								String.format(
												"Time value \"%s\" doesn't match the pattern \"%s\"",
												rawValue, PATTERN_TIME.pattern()));
			}
		}

		return result;
	}

	public static long getTimeInSeconds(final String rawValue) {
		final TimeUnit timeUnit = TimeUtil.getTimeUnit(rawValue);
		if (timeUnit == null) {
			return TimeUtil.getTimeValue(rawValue);
		} else {
			return timeUnit.toSeconds(TimeUtil.getTimeValue(rawValue));
		}
	}
}