/**
* 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.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}.
* <p>
* For the latter case, you can query whether a component has been defined explicitly by the given <code>versionString</code>,
* via {@link #hasMajor()}, {@link #hasMinor()} and {@link #hasSub()}.
* </p>
* <p>
* The state whether a component is defined explicitly <i>is not considered</i>
* in the {@link #hashCode()}, {@link #equals(Object)} or {@link #compareTo(Object)} methods,
* since the version number itself is treated regardless.
* </p>
*/
public class VersionNumber implements Comparable<Object> {
/**
* A {@link #isZero() zero} version instance, w/o any component defined explicitly.
* @see #hasMajor()
* @see #hasMinor()
* @see #hasSub()
*/
public static final VersionNumber zeroVersion = new VersionNumber(0, 0, 0, -1, (short)0);
/**
* Returns the {@link java.util.regex.Pattern pattern}
* with Perl regular expression:
* <pre>
* "\\D*(\\d+)[^\\"+delim+"\\s]*(?:\\"+delim+"\\D*(\\d+)[^\\"+delim+"\\s]*(?:\\"+delim+"\\D*(\\d+))?)?"
* </pre>
* </p>
* <p>
* A whitespace within the version number will end the parser.
* </p>
* <p>
* Capture groups represent the major (1), optional minor (2) and optional sub version number (3) component in this order.
* </p>
* <p>
* Each capture group ignores any leading non-digit and uses only contiguous digits, i.e. ignores pending non-digits.
* </p>
* @param delim the delimiter, e.g. "."
*/
public static java.util.regex.Pattern getVersionNumberPattern(String delim) {
return java.util.regex.Pattern.compile("\\D*(\\d+)[^\\"+delim+"\\s]*(?:\\"+delim+"\\D*(\\d+)[^\\"+delim+"\\s]*(?:\\"+delim+"\\D*(\\d+))?)?");
}
/**
* Returns the default {@link java.util.regex.Pattern pattern} using {@link #getVersionNumberPattern(String)}
* with delimiter "<b>.</b>".
* <p>
* Instance is cached.
* </p>
*/
public static java.util.regex.Pattern getDefaultVersionNumberPattern() {
if( null == defPattern ) { // volatile dbl-checked-locking OK
synchronized( VersionNumber.class ) {
if( null == defPattern ) {
defPattern = getVersionNumberPattern(".");
}
}
}
return defPattern;
}
private static volatile java.util.regex.Pattern defPattern = null;
protected final int major, minor, sub, strEnd;
protected final short state;
protected final static short HAS_MAJOR = 1 << 0 ;
protected final static short HAS_MINOR = 1 << 1 ;
protected final static short HAS_SUB = 1 << 2 ;
protected VersionNumber(int majorRev, int minorRev, int subMinorRev, int _strEnd, short _state) {
major = majorRev;
minor = minorRev;
sub = subMinorRev;
strEnd = _strEnd;
state = _state;
}
/**
* Explicit version number instantiation, with all components defined explicitly.
* @see #hasMajor()
* @see #hasMinor()
* @see #hasSub()
*/
public VersionNumber(int majorRev, int minorRev, int subMinorRev) {
this(majorRev, minorRev, subMinorRev, -1, (short)(HAS_MAJOR | HAS_MINOR | HAS_SUB));
}
/**
* String derived version number instantiation.
* <p>
* Utilizing the default {@link java.util.regex.Pattern pattern} parser with delimiter "<b>.</b>", see {@link #getDefaultVersionNumberPattern()}.
* </p>
* <p>
* You can query whether a component has been defined explicitly by the given <code>versionString</code>,
* via {@link #hasMajor()}, {@link #hasMinor()} and {@link #hasSub()}.
* </p>
* @param versionString should be given as [MAJOR[.MINOR[.SUB]]]
*
* @see #hasMajor()
* @see #hasMinor()
* @see #hasSub()
*/
public VersionNumber(final String versionString) {
this(versionString, getDefaultVersionNumberPattern());
}
/**
* String derived version number instantiation.
* <p>
* Utilizing {@link java.util.regex.Pattern pattern} parser created via {@link #getVersionNumberPattern(String)}.
* </p>
* <p>
* You can query whether a component has been defined explicitly by the given <code>versionString</code>,
* via {@link #hasMajor()}, {@link #hasMinor()} and {@link #hasSub()}.
* </p>
* @param versionString should be given as [MAJOR[.MINOR[.SUB]]]
* @param delim the delimiter, e.g. "."
*
* @see #hasMajor()
* @see #hasMinor()
* @see #hasSub()
*/
public VersionNumber(final String versionString, final String delim) {
this(versionString, getVersionNumberPattern(delim));
}
/**
* String derived version number instantiation.
* <p>
* You can query whether a component has been defined explicitly by the given <code>versionString</code>,
* via {@link #hasMajor()}, {@link #hasMinor()} and {@link #hasSub()}.
* </p>
* @param versionString should be given as [MAJOR[.MINOR[.SUB]]]
* @param versionPattern the {@link java.util.regex.Pattern pattern} parser, must be compatible w/ {@link #getVersionNumberPattern(String)}
*
* @see #hasMajor()
* @see #hasMinor()
* @see #hasSub()
*/
public VersionNumber(final String versionString, final java.util.regex.Pattern versionPattern) {
// group1: \d* == digits major
// group2: \d* == digits minor
// group3: \d* == digits sub
final int[] val = new int[3];
int _strEnd = 0;
short _state = 0;
try {
final Matcher matcher = versionPattern.matcher( versionString );
if( matcher.lookingAt() ) {
_strEnd = matcher.end();
final int groupCount = matcher.groupCount();
if( 1 <= groupCount ) {
val[0] = Integer.parseInt(matcher.group(1));
_state = HAS_MAJOR;
if( 2 <= groupCount ) {
val[1] = Integer.parseInt(matcher.group(2));
_state |= HAS_MINOR;
if( 3 <= groupCount ) {
val[2] = Integer.parseInt(matcher.group(3));
_state |= HAS_SUB;
}
}
}
}
} catch (Exception e) { }
major = val[0];
minor = val[1];
sub = val[2];
strEnd = _strEnd;
state = _state;
}
/** Returns <code>true</code>, if all version components are zero, otherwise <code>false</code>. */
public final boolean isZero() {
return major == 0 && minor == 0 && sub == 0;
}
/** Returns <code>true</code>, if the major component is defined explicitly, otherwise <code>false</code>. Undefined components has the value <code>0</code>. */
public final boolean hasMajor() { return 0 != ( HAS_MAJOR & state ); }
/** Returns <code>true</code>, if the optional minor component is defined explicitly, otherwise <code>false</code>. Undefined components has the value <code>0</code>. */
public final boolean hasMinor() { return 0 != ( HAS_MINOR & state ); }
/** Returns <code>true</code>, if the optional sub component is defined explicitly, otherwise <code>false</code>. Undefined components has the value <code>0</code>. */
public final boolean hasSub() { return 0 != ( HAS_SUB & state ); }
/**
* If constructed with <code>version-string</code>, returns the string offset <i>after</i> the last matching character,
* or <code>0</code> if none matched, or <code>-1</code> if not constructed with a string.
*/
public final int endOfStringMatch() { return strEnd; }
@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 ;
}
}