Package org.rssowl.core.internal.persist.service

Examples of org.rssowl.core.internal.persist.service.Migration

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   * @param destinationFormat The desired format of the database.
   * @return a Migration or {@code} null.
   */
  public final Migration getMigration(int originFormat, int destinationFormat) {
    Assert.isLegal(originFormat < destinationFormat, "Only forward migrations supported currently, originFormat: " + originFormat + ", destinationFormat: " + destinationFormat); //$NON-NLS-1$ //$NON-NLS-2$
    Migration migration = doGetMigration(originFormat, destinationFormat);
    if (migration != null)
      return migration;

    List<Migration> chainedMigrations = findChainedMigrations(originFormat, destinationFormat);
    if (chainedMigrations.isEmpty())
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  private LinkedList<LinkedList<Migration>> findMigrationQueues(LinkedList<LinkedList<Migration>> migrationQueues, int destinationFormat) {
    boolean changed = false;
    LinkedList<LinkedList<Migration>> migrationQueuesCopy = new LinkedList<LinkedList<Migration>>(migrationQueues);
    for (ListIterator<LinkedList<Migration>> it = migrationQueuesCopy.listIterator(); it.hasNext(); ) {
      LinkedList<Migration> migrationQueue = it.next();
      Migration migration = migrationQueue.getLast();
      if (migration.getDestinationFormat() == destinationFormat)
        continue;

      it.remove();

      for (Migration innerMigration : fMigrations) {
        if (migration.equals(innerMigration))
          continue;

        if (migration.getDestinationFormat() == innerMigration.getOriginFormat()) {
          changed = true;
          LinkedList<Migration> newMigrationQueue = new LinkedList<Migration>(migrationQueue);
          newMigrationQueue.add(innerMigration);
          it.add(newMigrationQueue);
        }
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   * @param destinationFormat The desired format of the database.
   * @return a Migration or {@code} null.
   */
  public final Migration getMigration(int originFormat, int destinationFormat) {
    Assert.isLegal(originFormat < destinationFormat, "Only forward migrations supported currently, originFormat: " + originFormat + ", destinationFormat: " + destinationFormat); //$NON-NLS-1$ //$NON-NLS-2$
    Migration migration = doGetMigration(originFormat, destinationFormat);
    if (migration != null)
      return migration;

    List<Migration> chainedMigrations = findChainedMigrations(originFormat, destinationFormat);
    if (chainedMigrations.isEmpty())
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  private LinkedList<LinkedList<Migration>> findMigrationQueues(LinkedList<LinkedList<Migration>> migrationQueues, int destinationFormat) {
    boolean changed = false;
    LinkedList<LinkedList<Migration>> migrationQueuesCopy = new LinkedList<LinkedList<Migration>>(migrationQueues);
    for (ListIterator<LinkedList<Migration>> it = migrationQueuesCopy.listIterator(); it.hasNext();) {
      LinkedList<Migration> migrationQueue = it.next();
      Migration migration = migrationQueue.getLast();
      if (migration.getDestinationFormat() == destinationFormat)
        continue;

      it.remove();

      for (Migration innerMigration : fMigrations) {
        if (migration.equals(innerMigration))
          continue;

        if (migration.getDestinationFormat() == innerMigration.getOriginFormat()) {
          changed = true;
          LinkedList<Migration> newMigrationQueue = new LinkedList<Migration>(migrationQueue);
          newMigrationQueue.add(innerMigration);
          it.add(newMigrationQueue);
        }
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   * Test if no migration is possible
   */
  @Test
  public void testNoMigrationPossible() {
    Migrations migrations = new Migrations(new MigrationImpl(2, 3), new MigrationImpl(3, 4));
    Migration migration = migrations.getMigration(1, 4);
    assertNull(migration);
  }
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   * Tests simple migration scenarios.
   */
  @Test
  public void testGetMigration() {
    Migrations migrations = new Migrations(new MigrationImpl(1, 2), new MigrationImpl(2, 3), new MigrationImpl(3, 4));
    Migration migration = migrations.getMigration(2, 4);
    assertEquals(ChainedMigration.class, migration.getClass());
    ChainedMigration chainedMigration = (ChainedMigration) migration;

    assertEquals(2, chainedMigration.getMigrations().size());
    assertEquals(migrations.getMigrations().get(1), chainedMigration.getMigrations().get(0));

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    Migrations migrations = new Migrations(new MigrationImpl(1, 2), new MigrationImpl(2, 3),
        new MigrationImpl(3, 4), new MigrationImpl(4, 6), new MigrationImpl(3, 5),
        new MigrationImpl(2, 4), new MigrationImpl(5, 6), new MigrationImpl(7, 9),
        new MigrationImpl(7, 8), new MigrationImpl(8, 9), new MigrationImpl(6, 8));

    Migration migration = migrations.getMigration(2, 8);

    assertEquals(ChainedMigration.class, migration.getClass());
    ChainedMigration chainedMigration = (ChainedMigration) migration;
    assertEquals(3, chainedMigration.getMigrations().size());
    assertEquals(migrations.getMigrations().get(5), chainedMigration.getMigrations().get(0));
    assertEquals(migrations.getMigrations().get(3), chainedMigration.getMigrations().get(1));
    assertEquals(migrations.getMigrations().get(10), chainedMigration.getMigrations().get(2));
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Related Classes of org.rssowl.core.internal.persist.service.Migration

  • org.rssowl.core.internal.persist.migration.Migrations
  • org.rssowl.core.tests.persist.MigrationsTest
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