/**
* Extracts the schema version and the description from a migration name formatted as
* 1_2__Description.
*
* @param migrationName The migration name to parse. Should not contain any folders or packages.
* @param prefix The migration prefix.
* @param separator The migration separator.
* @param suffix The migration suffix.
* @return The extracted schema version.
* @throws FlywayException if the migration name does not follow the standard conventions.
*/
public static Pair<MigrationVersion, String> extractVersionAndDescription(
String migrationName, String prefix, String separator, String suffix) {
String cleanMigrationName =
migrationName.substring(prefix.length(), migrationName.length() - suffix.length());
// Handle the description
int descriptionPos = cleanMigrationName.indexOf(separator);
if (descriptionPos < 0) {
throw new FlywayException(
"Wrong migration name format: "
+ migrationName
+ "(It should look like this: "
+ prefix
+ "1_2"
+ separator
+ "Description"
+ suffix
+ ")");
}
String version = cleanMigrationName.substring(0, descriptionPos);
String description =
cleanMigrationName.substring(descriptionPos + separator.length()).replaceAll("_", " ");
if (StringUtils.hasText(version)) {
return Pair.of(MigrationVersion.fromVersion(version), description);
}
return Pair.of(null, description);
}
/**
* Extracts the migration info for this resource.
*
* @param resource The resource to analyse.
* @return The migration info.
*/
private ResolvedMigrationImpl extractMigrationInfo(Resource resource) {
ResolvedMigrationImpl migration = new ResolvedMigrationImpl();
Pair<MigrationVersion, String> info =
MigrationInfoHelper.extractVersionAndDescription(
resource.getFilename(), sqlMigrationPrefix, sqlMigrationSeparator, sqlMigrationSuffix);
migration.setVersion(info.getLeft());
migration.setDescription(info.getRight());
migration.setScript(extractScriptName(resource));
migration.setChecksum(calculateChecksum(resource.loadAsBytes()));
migration.setType(MigrationType.SQL);
return migration;
}
