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

   * {@inheritDoc}
   */
  public IdentifierGenerator createIdentifierGenerator(String strategy, Type type, Properties config) {
    try {
      Class clazz = getIdentifierGeneratorClass( strategy );
      IdentifierGenerator idgen = ( IdentifierGenerator ) clazz.newInstance();
      if ( idgen instanceof Configurable ) {
        ( ( Configurable ) idgen ).configure( type, config, dialect );
      }
      return idgen;
    }

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    if ( !insertStatement.getIntoClause().isExplicitIdInsertion() ) {
      // We need to generate ids as part of this bulk insert.
      //
      // Note that this is only supported for sequence-style generators and
      // post-insert-style generators; basically, only in-db generators
      IdentifierGenerator generator = persister.getIdentifierGenerator();
      if ( !supportsIdGenWithBulkInsertion( generator ) ) {
        throw new QueryException( "can only generate ids as part of bulk insert with either sequence or post-insert style generators" );
      }


      AST idSelectExprNode = null;


      if ( SequenceGenerator.class.isAssignableFrom( generator.getClass() ) ) {
        String seqName = ( String ) ( ( SequenceGenerator ) generator ).generatorKey();
        String nextval = sessionFactoryHelper.getFactory().getDialect().getSelectSequenceNextValString( seqName );
        idSelectExprNode = getASTFactory().create( HqlSqlTokenTypes.SQL_TOKEN, nextval );
      }
      else {

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    Iterator iter = classes.values().iterator();
    while ( iter.hasNext() ) {
      PersistentClass pc = ( PersistentClass ) iter.next();
      if ( !pc.isInherited() ) {
        IdentifierGenerator ig = pc.getIdentifier().createIdentifierGenerator(
            getIdentifierGeneratorFactory(),
            dialect,
            defaultCatalog,
            defaultSchema,
            (RootClass) pc
        );


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


    iter = collections.values().iterator();
    while ( iter.hasNext() ) {
      Collection collection = ( Collection ) iter.next();
      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(),
            settings.getDialect(),
                settings.getDefaultCatalogName(),
                settings.getDefaultSchemaName(),
                (RootClass) model

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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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          // skip any 'assigned' generators, they would have been handled by
          // the StandardGenerationContextLocator
          continue;
        }


        final IdentifierGenerator valueGenerator = value.createIdentifierGenerator(
            identifierGeneratorFactory,
            dialect,
            defaultCatalog,
            defaultSchema,
            rootClass

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    if ( !insertStatement.getIntoClause().isExplicitIdInsertion() ) {
      // We need to generate ids as part of this bulk insert.
      //
      // Note that this is only supported for sequence-style generators and
      // post-insert-style generators; basically, only in-db generators
      IdentifierGenerator generator = persister.getIdentifierGenerator();
      if ( !supportsIdGenWithBulkInsertion( generator ) ) {
        throw new QueryException( "can only generate ids as part of bulk insert with either sequence or post-insert style generators" );
      }


      AST idSelectExprNode = null;


      if ( SequenceGenerator.class.isAssignableFrom( generator.getClass() ) ) {
        String seqName = ( String ) ( ( SequenceGenerator ) generator ).generatorKey();
        String nextval = sessionFactoryHelper.getFactory().getDialect().getSelectSequenceNextValString( seqName );
        idSelectExprNode = getASTFactory().create( HqlSqlTokenTypes.SQL_TOKEN, nextval );
      }
      else {

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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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        Environment.DEFAULT_SCHEMA);


    for (Iterator<PersistentClass> pcIter = config.getClassMappings(); pcIter.hasNext();) {
      PersistentClass pc = pcIter.next();
      if (!pc.isInherited()) {
        IdentifierGenerator ig = pc.getIdentifier().createIdentifierGenerator(
            config.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 (Iterator<Collection> collIter = config.getCollectionMappings(); collIter.hasNext();) {
      Collection collection = collIter.next();
      if (collection.isIdentified()) {
        IdentifierGenerator ig = ((IdentifierCollection) collection).getIdentifier()
            .createIdentifierGenerator(config.getIdentifierGeneratorFactory(), dialect,
                defaultCatalog, defaultSchema, null);


        if (ig instanceof PersistentIdentifierGenerator) {
          generators.put(((PersistentIdentifierGenerator) ig).generatorKey(), ig);

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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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