org.databene.commons.version.Versions Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of databene-commons Show documentation

'databene commons' is an open source Java library by Volker Bergmann. It provides extensions to the Java core library by utility classes, abstract concepts and concrete implementations.

The newest version!

/*
 * Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.databene.commons.version;

import java.text.ParsePosition;

import org.databene.commons.ComparableComparator;
import org.databene.commons.StringUtil;
import org.databene.commons.math.Interval;
import org.databene.commons.math.Intervals;
import org.databene.commons.math.IntervalsParser;

/**
 * {@link Intervals} implementation for {@link VersionNumber}s.
 * Created: 11.03.2011 10:09:15
 * @since 0.5.8
 * @author Volker Bergmann
 */
public class Versions extends Intervals {

	private static final long serialVersionUID = 6258577730893701943L;
	
	private static final ComparableComparator VERSION_COMPARATOR = new ComparableComparator();

	public static Versions valueOf(String spec) {
		if (StringUtil.isEmpty(spec) || "*".equals(spec.trim()))
			return createUnlimited();
		IntervalsParser parser = new IntervalsParser(
				new VersionNumberParser(), VERSION_COMPARATOR);
		return (Versions) parser.parseObject(spec, new ParsePosition(0), new Versions());
	}

	public static Versions createUnlimited() {
		Versions result = new Versions();
		result.add(Interval.createInfiniteInterval());
		return result;
	}

	public static Versions createSingleVersion(VersionNumber version) {
		Versions result = new Versions();
		result.add(new Interval(version, true, version, true, VERSION_COMPARATOR));
		return result;
	}

}