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'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.

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/*
 * Copyright (C) 2004-2014 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 org.databene.commons.comparator.IntComparator;

/**
 * Number based {@link VersionNumberComponent}.

 * 

 * Created at 22.12.2008 16:33:56
 * @since 0.5.7
 * @author Volker Bergmann
 */

public class NumberVersionNumberComponent extends VersionNumberComponent {
	
	private static final long serialVersionUID = -4669653693506092150L;
	
	private final String numberString;
	private final int number;

	public NumberVersionNumberComponent(String numberString) {
		this.numberString = numberString;
		this.number = Integer.parseInt(numberString);
	}

	public NumberVersionNumberComponent(int number) {
		this.numberString = String.valueOf(number);
		this.number = number;
	}

	@Override
	public int compareTo(VersionNumberComponent that) {
		if (that == null)
			return IntComparator.compare(number, 0);
		if (!(that instanceof NumberVersionNumberComponent)) // numbers are more significant than markers like 'alpha'
			return 1;
		return IntComparator.compare(this.number, ((NumberVersionNumberComponent) that).number);
	}
	
	public int getNumber() {
		return number;
	}
	
	@Override
	public String toString() {
		return numberString;
	}

	@Override
	public int hashCode() {
		return number;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null || this.getClass() != obj.getClass())
			return false;
		NumberVersionNumberComponent that = (NumberVersionNumberComponent) obj;
		return this.number == that.number;
	}
	
}