public String getVersion(Class<?> api) {
log.trace("getVersion for {}", api);
Package pkg = api.getPackage();
log.trace(" -> {}/{}", pkg.getImplementationVersion(), pkg.getSpecificationVersion());
String version = pkg.getSpecificationVersion();
if (version == null) version = pkg.getImplementationVersion();
if (version == null) {
try {
version = readVersionFromManifest(api);
} catch (IOException e) {
log.error("Could not extract version for " + api, e);
return null;
}
}
return version;
}
/**
* Check whether a given application version is compatible with the version of JHotDraw currently
* loaded in the Java VM. A version number is available if there is a corresponding version entry
* in the JHotDraw jar file for the framework package.
*/
public static boolean isCompatibleVersion(String compareVersionString) {
// Package pack = VersionManagement.class.getPackage();
Package pack = packages[4];
if (compareVersionString == null) {
return pack.getSpecificationVersion() == null;
} else {
return pack.isCompatibleWith(compareVersionString);
}
}
public static String getPackageVersion(final Package lookupPackage) {
if (lookupPackage == null) {
return null;
}
String specVersion = lookupPackage.getSpecificationVersion();
if (specVersion != null) {
return specVersion;
} else {
// search in parent package
String normalizedPackageName = normalizePackageName(lookupPackage.getName());
String nextPackageName = getNextPackage(normalizedPackageName);
return getPackageVersion(Package.getPackage(nextPackageName));
}
}
/**
* Return the version of the main package of the framework. A version number is available if there
* is a corresponding version entry in the JHotDraw jar file for the framework package.
*/
public static String getJHotDrawVersion() {
// look for the framework main package
Package pack = packages[4];
return pack.getSpecificationVersion();
}