org.scijava.util.VersionUtils Maven / Gradle / Ivy
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SciJava Common is a shared library for SciJava software. It provides a plugin framework, with an extensible mechanism for service discovery, backed by its own annotation processor, so that plugins can be loaded dynamically. It is used by downstream projects in the SciJava ecosystem, such as ImageJ and SCIFIO.
/*
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* SciJava Common shared library for SciJava software.
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* Copyright (C) 2009 - 2016 Board of Regents of the University of
* Wisconsin-Madison, Broad Institute of MIT and Harvard, and Max Planck
* Institute of Molecular Cell Biology and Genetics.
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
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package org.scijava.util;
/**
* Useful methods for retrieving versions from JARs and POMs associated with
* {@link Class} objects.
*
* @author Curtis Rueden
* @author Mark Hiner
*/
public class VersionUtils {
/**
* Looks up the version of the specified class using any means available,
* appending the build number to any {@code SNAPSHOT} version. Will only
* search POMs in the base directory.
*
* @param c - Look up this class's version
* @return Version of specified {@link Class} or null if not found.
*/
public static String getVersion(final Class c) {
return getVersion(c, null, null);
}
/**
* Looks up the version of the specified class using any means available,
* appending the build number to any {@code SNAPSHOT} version. The
* {@code groupId} and {@code artifactId} parameters allow specification of
* the POM lookup path.
*
* @param c - Look up this class's version
* @param groupId - Maven group ID containing class
* @param artifactId - Maven artifact ID containing class
* @return Version of specified {@link Class} or null if not found.
*/
public static String getVersion(final Class c, final String groupId,
final String artifactId)
{
final String version = getVersionFromManifest(c);
if (version != null) return version;
return getVersionFromPOM(c, groupId, artifactId);
}
/**
* Looks up the version of the specified class using a JAR manifest if
* available, appending the build number to any {@code SNAPSHOT} version.
*
* @param c - Look up this class's version
* @return Version of specified {@link Class} or null if not found.
*/
public static String getVersionFromManifest(final Class c) {
final Manifest m = Manifest.getManifest(c);
return m == null ? null : m.getVersion();
}
/**
* Looks up the version of the specified class using the specified POM, or
* base POM directory if {@code groupId} and {@code artifactId} are
* {@code null}.
*
* @param c - Look up this class's version
* @param groupId - Maven group ID containing class
* @param artifactId - Maven artifact ID containing class
* @return Version of specified {@link Class} or null if not found.
*/
public static String getVersionFromPOM(final Class c,
final String groupId, final String artifactId)
{
final POM pom = POM.getPOM(c, groupId, artifactId);
return pom == null ? null : pom.getVersion();
}
/**
* Looks up the build number (typically an SCM revision) of the specified
* class. This information is retrieved from the JAR manifest's
* Implementation-Build entry, or null if no such value exists.
*
* @param c - Look up this class's build number
* @return Build number of specified {@link Class} or null if not found.
*/
public static String getBuildNumber(final Class c) {
final Manifest m = Manifest.getManifest(c);
return m == null ? null : m.getImplementationBuild();
}
}