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/**
* Copyright 2010 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package com.jogamp.common.util;
import java.util.StringTokenizer;
import java.util.regex.Matcher;
/**
* Simple version number class containing a version number
* either being {@link #VersionNumber(int, int, int) defined explicit}
* or {@link #VersionNumber(String, String) derived from a string}.
*/
public class VersionNumber implements Comparable<Object> {
protected final int major, minor, sub;
/** Explicit version number instantiation. */
public VersionNumber(int majorRev, int minorRev, int subMinorRev) {
major = majorRev;
minor = minorRev;
sub = subMinorRev;
}
/**
* String derived version number instantiation.
* <p>
* Parser first tokenizes the input versionString w/ given delimiter.
* </p>
* <p>
* Tokens represent the major, minor and sub version number component in this order.
* </p>
* <p>
* For each token it ignores any leading non-digit and uses only contiguous digits, i.e. ignores pending non-digits.
* </p>
* @param versionString should be given as [MAJOR[.MINOR[.SUB]]]
* @param delim the delimiter, e.g. "."
*/
public VersionNumber(String versionString, String delim) {
// group1: \D* == leading non digits, optional
// group2: \d* == digits
// group3: .* == any pending chars, optional
final java.util.regex.Pattern nonDigitsCutOff = java.util.regex.Pattern.compile("(\\D*)(\\d*)(.*)");
final StringTokenizer tok = new StringTokenizer(versionString, delim);
final int[] val = new int[3];
for(int n=0; tok.hasMoreTokens() && n<3; n++) {
try {
final Matcher matcher = nonDigitsCutOff.matcher( tok.nextToken() );
if(matcher.matches()) {
val[n] = Integer.parseInt(matcher.group(2));
}
} catch (Exception e) { }
}
major = val[0];
minor = val[1];
sub = val[2];
}
public final boolean isZero() {
return major == 0 && minor == 0 && sub == 0;
}
@Override
public final int hashCode() {
// 31 * x == (x << 5) - x
int hash = 31 + major;
hash = ((hash << 5) - hash) + minor;
return ((hash << 5) - hash) + sub;
}
@Override
public final boolean equals(Object o) {
if ( o instanceof VersionNumber ) {
return 0 == compareTo( (VersionNumber) o );
}
return false;
}
@Override
public final int compareTo(Object o) {
if ( ! ( o instanceof VersionNumber ) ) {
Class<?> c = (null != o) ? o.getClass() : null ;
throw new ClassCastException("Not a VersionNumber object: " + c);
}
return compareTo( (VersionNumber) o );
}
public final int compareTo(VersionNumber vo) {
if (major > vo.major) {
return 1;
} else if (major < vo.major) {
return -1;
} else if (minor > vo.minor) {
return 1;
} else if (minor < vo.minor) {
return -1;
} else if (sub > vo.sub) {
return 1;
} else if (sub < vo.sub) {
return -1;
}
return 0;
}
public final int getMajor() {
return major;
}
public final int getMinor() {
return minor;
}
public final int getSub() {
return sub;
}
@Override
public String toString() {
return major + "." + minor + "." + sub ;
}
}
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