/
MigrationInfoHelper.java
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/
MigrationInfoHelper.java
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/**
* Copyright 2010-2016 Boxfuse GmbH
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.flywaydb.core.internal.resolver;
import org.flywaydb.core.api.FlywayException;
import org.flywaydb.core.api.MigrationVersion;
import org.flywaydb.core.internal.util.Pair;
import org.flywaydb.core.internal.util.StringUtils;
/**
* Parsing support for migrations that use the standard Flyway version + description embedding in their name. These
* migrations have names like 1_2__Description .
*/
public class MigrationInfoHelper {
/**
* Prevents instantiation.
*/
private MigrationInfoHelper() {
//Do nothing.
}
/**
* 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);
}
}