Java Version.getMajorVersion方法代码示例

import com.github.zafarkhaja.semver.Version; //导入方法依赖的package包/类
public static Optional<Scope> inferScope(Version before, Version after) {
  int major = after.getMajorVersion() - before.getMajorVersion();
  int minor = after.getMinorVersion() - before.getMinorVersion();
  int patch = after.getPatchVersion() - before.getPatchVersion();
  if (major == 1 && after.getMinorVersion() == 0 && after.getPatchVersion() == 0) {
    return Optional.of(Scope.MAJOR);
  } else if (major == 0 && minor == 1 && after.getPatchVersion() == 0) {
    return Optional.of(Scope.MINOR);
  } else if (major == 0 && minor == 0 && patch == 1) {
    return Optional.of(Scope.PATCH);
  } else {
    logger.debug(
        "Invalid increment between the following versions. Cannot infer scope between: {} -> {}",
        before,
        after);
    return Optional.empty();
  }
}
 

import com.github.zafarkhaja.semver.Version; //导入方法依赖的package包/类
/**
 * Determines change between two versions  
 * @param versionStr0  first version string
 * @param versionStr1  second version string
 * @return  version change, one of ["major", "minor", "patch"] or null if some error occurs
 */
public static String determineVersionChange(String versionStr0, String versionStr1) {
	Version v0 = VersionWrapper.valueOf(versionStr0);
	Version v1 = VersionWrapper.valueOf(versionStr1);
	
	if (v0.getMajorVersion() < v1.getMajorVersion()) {
		return CHANGE_MAJOR;
	} 
	
	else if (v0.getMajorVersion() == v1.getMajorVersion()) {
		
		if (v0.getMinorVersion() < v1.getMinorVersion()) {
			return CHANGE_MINOR;
		} else if (v0.getMinorVersion() == v1.getMinorVersion()) {
			
			if (v0.getPatchVersion() < v1.getPatchVersion()) {
				return CHANGE_PATCH;
			} else if (v0.getPatchVersion() == v1.getPatchVersion()) {
				if (!v1.getBuildMetadata().isEmpty())  // subpatch levels are encoded by build meta data through VersionWrapper
					return CHANGE_PATCH;
			} else
				return null;
		}
	} 

	return null;
}
 

import com.github.zafarkhaja.semver.Version; //导入方法依赖的package包/类
/**
 *
 * @return {@code true} if there is <b>nothing</b> to do.
 */
public boolean dbNeedsMigration()
{
	final Version dbVersion = Version.valueOf(dbVersionStr);

	logger.info("AD_System.DBVersion is {}", dbVersion);

	final Version rolloutVersion = Version.valueOf(rolloutVersionStr);
	logger.info("Our own version is {}", rolloutVersion);

	final int comp = dbVersion.compareTo(rolloutVersion);
	if (comp == 0)
	{
		logger.info("AD_System.DBVersion is equal to our version. Nothing to do.");
		return false;
	}
	else if (comp < 0)
	{
		// dbVersion is lower than rolloutVersion
		// => we need to do the migration to "elevate" it
		logger.info("The DB version is lower than our own version. Going to migrate");
		return true;
	}

	// Check if we have the special case of issue https://github.com/metasfresh/metasfresh/issues/2260
	final boolean sameMajorVersion = dbVersion.getMajorVersion() == rolloutVersion.getMajorVersion();
	final boolean sameMinorVersion = dbVersion.getMinorVersion() == rolloutVersion.getMinorVersion();
	final boolean patchVersionSwitchBetweenOneAndTwo = //
			dbVersion.getPatchVersion() == 1 && rolloutVersion.getPatchVersion() == 2 //
					|| dbVersion.getPatchVersion() == 2 && rolloutVersion.getPatchVersion() == 1;

	if (sameMajorVersion
			&& sameMinorVersion
			&& patchVersionSwitchBetweenOneAndTwo)
	{
		logger.info("Detected a version switch between master (=> patchVersion=1) and release, issue etc (=> patchVersion=2). Assuming that the DB needs migration. Also see https://github.com/metasfresh/metasfresh/issues/2260");
		return true;
	}
	
	// check if we have a switch between two non-master branches
	if(!Objects.equals(dbVersion.getBuildMetadata(), rolloutVersion.getBuildMetadata()))
	{
		logger.info("Detected a version switch between \"branches\" dbVersion={} and rolloutVersion={}. Assuming that the DB needs migration. Also see https://github.com/metasfresh/metasfresh/issues/2260",
				dbVersion.getPreReleaseVersion(), rolloutVersion.getPreReleaseVersion());
		return true;
	}
	
	// Issue https://github.com/metasfresh/metasfresh/issues/2260 does not apply..
	// dbVersion higher....uh-ooh
	final String msg = "The code has version " + rolloutVersionStr + " but the DB already has version " + dbVersionStr;

	if (!failIfRolloutIsGreaterThanDB)
	{
		// let's ignore the problem
		logger.info(msg + ". *Not* throwing exception because of the +" + CommandlineParams.OPTION_DoNotFailIfRolloutIsGreaterThanDB + " parameter; but not going to attempt migration either.");
		return false;
	}

	throw new InconsistentVersionsException(msg);
}