Examples of org.hibernate.id.IdentifierGenerator

org.hibernate.id.IdentifierGenerator
The general contract between a class that generates unique identifiers and the Session. It is not intended that this interface ever be exposed to the application. It is intended that users implement this interface to provide custom identifier generation strategies.

Implementors should provide a public default constructor.

Implementations that accept configuration parameters should also implement Configurable.
Implementors must be thread-safe @author Gavin King @see PersistentIdentifierGenerator @see Configurable

  }


  public void testInsertWithGeneratedVersionAndId() {
    // Make sure the env supports bulk inserts with generated ids...
    EntityPersister persister = sfi().getEntityPersister( IntegerVersioned.class.getName() );
    IdentifierGenerator generator = persister.getIdentifierGenerator();
    if ( !HqlSqlWalker.supportsIdGenWithBulkInsertion( generator ) ) {
      return;
    }


    Session s = openSession();

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  }


  public void testInsertWithGeneratedTimestampVersion() {
    // Make sure the env supports bulk inserts with generated ids...
    EntityPersister persister = sfi().getEntityPersister( TimestampVersioned.class.getName() );
    IdentifierGenerator generator = persister.getIdentifierGenerator();
    if ( !HqlSqlWalker.supportsIdGenWithBulkInsertion( generator ) ) {
      return;
    }


    // dialects which do not allow a parameter in the select portion of an INSERT ... SELECT statement

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    String defaultCatalog = properties.getProperty( Environment.DEFAULT_CATALOG );
    String defaultSchema = properties.getProperty( Environment.DEFAULT_SCHEMA );


    for ( PersistentClass pc : classes.values() ) {
      if ( !pc.isInherited() ) {
        IdentifierGenerator ig = pc.getIdentifier().createIdentifierGenerator(
            getIdentifierGeneratorFactory(),
            dialect,
            defaultCatalog,
            defaultSchema,
            (RootClass) pc
        );


        if ( ig instanceof PersistentIdentifierGenerator ) {
          generators.put( ( (PersistentIdentifierGenerator) ig ).generatorKey(), ig );
        }
        else if ( ig instanceof IdentifierGeneratorAggregator ) {
          ( (IdentifierGeneratorAggregator) ig ).registerPersistentGenerators( generators );
        }
      }
    }


    for ( Collection collection : collections.values() ) {
      if ( collection.isIdentified() ) {
        IdentifierGenerator ig = ( ( IdentifierCollection ) collection ).getIdentifier().createIdentifierGenerator(
            getIdentifierGeneratorFactory(),
            dialect,
            defaultCatalog,
            defaultSchema,
            null

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    identifierGenerators = new HashMap();
    Iterator classes = cfg.getClassMappings();
    while ( classes.hasNext() ) {
      PersistentClass model = (PersistentClass) classes.next();
      if ( !model.isInherited() ) {
        IdentifierGenerator generator = model.getIdentifier().createIdentifierGenerator(
            cfg.getIdentifierGeneratorFactory(),
            getDialect(),
                settings.getDefaultCatalogName(),
                settings.getDefaultSchemaName(),
                (RootClass) model

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    if ( !insertStatement.getIntoClause().isExplicitIdInsertion() ) {
      // the insert did not explicitly reference the id.  See if
      //    1) that is allowed
      //    2) whether we need to alter the SQL tree to account for id
      final IdentifierGenerator generator = persister.getIdentifierGenerator();
      if ( !BulkInsertionCapableIdentifierGenerator.class.isInstance( generator ) ) {
        throw new QueryException(
            "Invalid identifier generator encountered for implicit id handling as part of bulk insertions"
        );
      }

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    data.cleanup();
  }


  protected boolean supportsBulkInsertIdGeneration(Class entityClass) {
    EntityPersister persister = sfi().getEntityPersister( entityClass.getName() );
    IdentifierGenerator generator = persister.getIdentifierGenerator();
    return HqlSqlWalker.supportsIdGenWithBulkInsertion( generator );
  }

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  protected void runSchemaDrop() {
  }


  public void testMinimalSequenceEntity() {
    final EntityPersister persister = sfi().getEntityPersister( MinimalSequenceEntity.class.getName() );
    IdentifierGenerator generator = persister.getIdentifierGenerator();
    assertTrue( SequenceStyleGenerator.class.isInstance( generator ) );
    SequenceStyleGenerator seqGenerator = (SequenceStyleGenerator) generator;
    assertEquals( MinimalSequenceEntity.SEQ_NAME, seqGenerator.getDatabaseStructure().getName() );
    // 1 is the annotation default
    assertEquals( 1, seqGenerator.getDatabaseStructure().getInitialValue() );

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    assertFalse( OptimizerFactory.NoopOptimizer.class.isInstance( seqGenerator.getOptimizer() ) );
  }


  public void testCompleteSequenceEntity() {
    final EntityPersister persister = sfi().getEntityPersister( CompleteSequenceEntity.class.getName() );
    IdentifierGenerator generator = persister.getIdentifierGenerator();
    assertTrue( SequenceStyleGenerator.class.isInstance( generator ) );
    SequenceStyleGenerator seqGenerator = (SequenceStyleGenerator) generator;
    assertEquals( "my_catalog.my_schema."+CompleteSequenceEntity.SEQ_NAME, seqGenerator.getDatabaseStructure().getName() );
    assertEquals( 1000, seqGenerator.getDatabaseStructure().getInitialValue() );
    assertEquals( 52, seqGenerator.getDatabaseStructure().getIncrementSize() );

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    assertFalse( OptimizerFactory.NoopOptimizer.class.isInstance( seqGenerator.getOptimizer() ) );
  }


  public void testAutoEntity() {
    final EntityPersister persister = sfi().getEntityPersister( AutoEntity.class.getName() );
    IdentifierGenerator generator = persister.getIdentifierGenerator();
    assertTrue( SequenceStyleGenerator.class.isInstance( generator ) );
    SequenceStyleGenerator seqGenerator = (SequenceStyleGenerator) generator;
    assertEquals( SequenceStyleGenerator.DEF_SEQUENCE_NAME, seqGenerator.getDatabaseStructure().getName() );
    assertEquals( SequenceStyleGenerator.DEFAULT_INITIAL_VALUE, seqGenerator.getDatabaseStructure().getInitialValue() );
    assertEquals( SequenceStyleGenerator.DEFAULT_INCREMENT_SIZE, seqGenerator.getDatabaseStructure().getIncrementSize() );

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    assertEquals( SequenceStyleGenerator.DEFAULT_INCREMENT_SIZE, seqGenerator.getDatabaseStructure().getIncrementSize() );
  }


  public void testMinimalTableEntity() {
    final EntityPersister persister = sfi().getEntityPersister( MinimalTableEntity.class.getName() );
    IdentifierGenerator generator = persister.getIdentifierGenerator();
    assertTrue( TableGenerator.class.isInstance( generator ) );
    TableGenerator tabGenerator = (TableGenerator) generator;
    assertEquals( MinimalTableEntity.TBL_NAME, tabGenerator.getTableName() );
    assertEquals( TableGenerator.DEF_SEGMENT_COLUMN, tabGenerator.getSegmentColumnName() );
    assertEquals( "MINIMAL_TBL", tabGenerator.getSegmentValue() );

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