org.qi4j.migration.assembly

## Class MigrationRule

- java.lang.Object
- - org.qi4j.migration.assembly.AbstractMigrationRule
  - - org.qi4j.migration.assembly.MigrationRule

-     public class MigrationRule
      extends AbstractMigrationRule

  Migration rule that does not apply to a specific entity type

- - ### Field Summary

    - ### Fields inherited from class org.qi4j.migration.assembly.AbstractMigrationRule

      `fromVersion, toVersion`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `MigrationRule(String fromVersion, String toVersion, MigrationOperation operation)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `downgrade(StateStore stateStore, Migrator migrator)`
    `String` | `toString()`
    `void` | `upgrade(StateStore stateStore, Migrator migrator)`

    - ### Methods inherited from class org.qi4j.migration.assembly.AbstractMigrationRule

      `fromVersion, toVersion`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- - ### Constructor Detail

    - #### MigrationRule

          public MigrationRule(String fromVersion,
                       String toVersion,
                       MigrationOperation operation)

  - ### Method Detail

    - #### upgrade

          public void upgrade(StateStore stateStore,
                     Migrator migrator)
                       throws IOException

      Throws:
        `IOException`

    - #### downgrade

          public void downgrade(StateStore stateStore,
                       Migrator migrator)
                         throws IOException

      Throws:
        `IOException`

    - #### toString

          public String toString()

      Overrides:
        `toString` in class `Object`