import org.hibernate.id.SequenceGenerator; //导入依赖的package包/类
/**
 * The class (which implements {@link org.hibernate.id.IdentifierGenerator})
 * which acts as this dialects native generation strategy.
 * <p/>
 * Comes into play whenever the user specifies the native generator.
 *
 * @return The native generator class.
 */
public Class getNativeIdentifierGeneratorClass() {
	if ( supportsIdentityColumns() ) {
		return IdentityGenerator.class;
	}
	else if ( supportsSequences() ) {
		return SequenceGenerator.class;
	}
	else {
		return TableHiLoGenerator.class;
	}
}
 

import org.hibernate.id.SequenceGenerator; //导入依赖的package包/类
@Override
public Class getIdentifierGeneratorClass(String strategy) {
    Class generatorClass = super.getIdentifierGeneratorClass(strategy);
    if("native".equals(strategy) && generatorClass == SequenceGenerator.class) {
        generatorClass = super.getIdentifierGeneratorClass("sequence-identity");
    }
    return generatorClass;
}
 

import org.hibernate.id.SequenceGenerator; //导入依赖的package包/类
@Override
public Class getNativeIdentifierGeneratorClass() {
	return SequenceGenerator.class;
}
 

import org.hibernate.id.SequenceGenerator; //导入依赖的package包/类
public Class getNativeIdentifierGeneratorClass() {
	return SequenceGenerator.class;
}
 

import org.hibernate.id.SequenceGenerator; //导入依赖的package包/类
public static boolean supportsIdGenWithBulkInsertion(IdentifierGenerator generator) {
	return SequenceGenerator.class.isAssignableFrom( generator.getClass() )
	        || PostInsertIdentifierGenerator.class.isAssignableFrom( generator.getClass() );
}
 

import org.hibernate.id.SequenceGenerator; //导入依赖的package包/类
@Override
public Class getNativeIdentifierGeneratorClass() {
    return SequenceGenerator.class;
}
 

import org.hibernate.id.SequenceGenerator; //导入依赖的package包/类
/**
 * Constructs a new DefaultIdentifierGeneratorFactory.
 */
public DefaultIdentifierGeneratorFactory() {
	register( "uuid2", UUIDGenerator.class );
	register( "guid", GUIDGenerator.class );			// can be done with UUIDGenerator + strategy
	register( "uuid", UUIDHexGenerator.class );			// "deprecated" for new use
	register( "uuid.hex", UUIDHexGenerator.class ); 	// uuid.hex is deprecated
	register( "hilo", TableHiLoGenerator.class );
	register( "assigned", Assigned.class );
	register( "identity", IdentityGenerator.class );
	register( "select", SelectGenerator.class );
	register( "sequence", SequenceGenerator.class );
	register( "seqhilo", SequenceHiLoGenerator.class );
	register( "increment", IncrementGenerator.class );
	register( "foreign", ForeignGenerator.class );
	register( "sequence-identity", SequenceIdentityGenerator.class );
	register( "enhanced-sequence", SequenceStyleGenerator.class );
	register( "enhanced-table", TableGenerator.class );
}