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/**
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* '$RCSfile$'
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* Copyright: 2004 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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*
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* '$Author: daigle $'
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* '$Date: 2008-07-06 21:25:34 -0700 (Sun, 06 Jul 2008) $'
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* '$Revision: 4080 $'
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package edu.ucsb.nceas.metacat;
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import java.util.Vector;
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import edu.ucsb.nceas.utilities.StringUtil;
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/**
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* @author jones
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*
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* Version represents the current version information for this Metacat instance.
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*/
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public class Version implements Comparable<Version>
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{
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protected static int allowedVersionLevels = 4;
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protected int[] subversions = {0, 0, 0, 0};
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protected String versionString = null;
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/**
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* Create a Version object, setting sub version levels based on the given
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* version id.
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*
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* @param versionID
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*/
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public Version(String versionID) {
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setSubversions(versionID);
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versionString = versionID;
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}
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/**
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* Compare this Version object to another. Use the sub version levels to do
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* the comparison. In that way, we can make sure that something like version
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* 1.0.0.1 is less than 2.0.1.
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*
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* @param anotherVersion
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* @return -1 if this version is less than given version, 0 if they are
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* equal and 1 if this version is greater than given version.
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*/
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public int compareTo(Version anotherVersion) {
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for (int i = 0; i < allowedVersionLevels; i++) {
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if (this.getSubversion(i) < ((Version)anotherVersion).getSubversion(i)) {
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return -1;
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} else if (this.getSubversion(i) > ((Version)anotherVersion).getSubversion(i)) {
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return 1;
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}
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}
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return 0;
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}
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public int getSubversion(int level) {
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return subversions[level];
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}
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/**
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* Set each level (up to 4) of sub version based on the given version id.
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*
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* @param versionID
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* a string representing a dotted version notation
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*/
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private void setSubversions(String versionID) throws NumberFormatException {
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Vector<String> subversionStrings = StringUtil.toVector(versionID, '.');
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for (int i = 0; i < subversionStrings.size() && i < allowedVersionLevels; i++) {
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int subversion = Integer.parseInt(subversionStrings.elementAt(i));
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this.subversions[i] = subversion;
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}
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}
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public String getVersionString() {
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return versionString;
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}
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}
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