A proxy is returned when actually a load is called on a session. Mapping of classes can be made into a proxy instead of a table. The more the collection, the more efficient of sorting. The sorting is done in the memory of JVM that is running hibernate, soon after reading the data from the database using Java Comparator The less the collection the more the efficient of sorting Ordered Collection The order collections will also sorts a collection by using the order by clause for the results fetched. Sorted Collection The sorted collection is a collection that is sorted using the Java collections framework. What is the difference between sorted and ordered collection in hibernate? Spring supports hibernate and provides the different classes which are templates that contain the common code. ![]() Spring is a framework for enterprise applications. Hibernate is an ORM tool for data persistency. What is the difference between hibernate and Spring? The central method is execute(), which supports the Hibernate code that implements HibernateCallback interface. HibernateTemplate is typically used to implement data access or business logic services. This class supports automatically converts HibernateExceptions which is a checked exception into DataAccessExceptions which is an unchecked exception. HibernateTemplate is a helper class that is used to simplify the data access code. Execution of the query in order to get the list of containing java objects.Obtain a session from the session factory.Creation of session factory from the configuration object.The mapping of all hbm files will be performed automatically. The Hibernate configuration is to be loaded and creation of configuration object is done.The general flow of Hibernate communication with RDBMS is: Explain the general flow of Hibernate communication with RDBMS? This wrapping makes the easy accessibility to it in an application code. In order to access it in the application code, it should be wrapped in singleton. A SessionFactory will be built only at the time of its startup. Because of this feature, many threads can access this concurrently and the sessions are requested, and also the cache that is immutable of compiled mappings for a specific database. The SessionFactory is the concept that is a single data store and thread safe. SessionFactory is an interface and extends Referenceable, Serializable. Whereas in JDBC the java cache is to be implemented. With the support of cache of hibernate, the data can be placed in the cache for better performance. Whereas in JDBC the query tuning is to be done by the database authors. The query tuning is automatic in hibernate by using criteria queries, and the result of performance is at its best. Query tuning is not required in Hibernate.No knowledge of SQL is needed because Hibernate is a set of objects and a table is treated as an object, where as to work with JDBC, one needs to know SQL.Hibernate code will work well for all databases, for ex: Oracle,MySQL, etc.The advantages of Hibernate over JDBC are: ![]() What are the advantage of Hibernate over jdbc? Detached This is a state for an instance that was previously associated with a persistence context and has been currently closed dissociated.Persistent In this state, an instance is associated with a persistence context.Transient In this state, an instance is not associated with any persistence context.What are the different types of Hibernate instance states? IDEs like eclipse supports to create the description files. So the flexibility in mapping is attained, instead of hard coding. By using a simple mapping file, the fields of the class and the fields of the table is done. Creating a POJO may implement the Java bean mechanism of using setters and getters methods for assigning values and they can be used to persist on the database. The implementation is done by just using POJOs. Hibernate has advantages over using entity beans or JDBC calls. Hibernate reduces the time to perform database operations. ![]() ![]() Why do you need an ORM tool like Hibernate? Hibernate solves object-relational impedance mismatch problems by replacing direct persistence-related database accesses with high-level object handling functions. Hibernate is an object-relational mapping (ORM) library for the Java language, providing a framework for mapping an object-oriented domain model to a traditional relational database.
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