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

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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(
            settings.getDialect(),
                settings.getDefaultCatalogName(),
                settings.getDefaultSchemaName(),
                (RootClass) model
          );

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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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    while ( iter.hasNext() ) {
      PersistentClass pc = (PersistentClass) iter.next();


      if ( !pc.isInherited() ) {


        IdentifierGenerator ig = pc.getIdentifier()
            .createIdentifierGenerator(
                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(
                dialect,
                defaultCatalog,
                defaultSchema,
                null

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