public Set<Migration> resolve(DatabaseType dbType) {
Set<Migration> migrations = new HashSet<Migration>();
// Find all resources in the migrations location.
File path = new File(Play.applicationPath, migrationsLocation);
List<Resource> resources = new ArrayList<Resource>();
Collection<File> files = FileUtils.listFiles(path, new String[] {"sql"}, true);
for (File file : files) {
resources.add(new Resource(file));
}
if (resources.isEmpty()) {
String message = "No migrations were found from path '" + path.getAbsolutePath() + "'.";
logger.error(message);
throw new MigrationException(message);
}
if (logger.isDebugEnabled()) {
logger.debug("Found " + resources.size() + " resources: " + resources);
}
// Extract versions and create executable migrations for each resource.
for (Resource resource : resources) {
String version = versionExtractor.extractVersion(resource.getFilename());
if (find(migrations, new Migration.MigrationVersionPredicate(version)) != null) {
String message = "Non-unique migration version.";
logger.error(message);
throw new MigrationException(message);
}
migrations.add(migrationFactory.create(version, resource));
}
return migrations;
}
