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Java Hibernate provides open source object relational mapping which is used to change object type data into data base tables .Hibernate provides a medium between code and data base . Persistence objects , XML mapping and hibernate properties are the part of Hibernate .
Features of Hibernate are :
Byte code generation and build time source are not required .
Checking are automatically done .
Powerful object oriented query language .
Provides more transparency .
External provide services are easily integrated by hibernate .
Extensible type system .
Types of Objects in hibernate:-
Configuration object : It is the first hibernate object created in any hibernate application . The two key components of configuration mapping are Database connection and Class mapping setup .
Session Factory object : This object is heavily weighted which is created during application startup .
Session object : Data base is physically connected by this session object . It is also a light weight object .
Transaction object : Unit of work is represented by Transaction object .Transaction manager will handle all the transaction in hibernate .
Query object : SQL or Hibernate Query Language are used by Query objects to received data from database and objects are created .
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An object relational frame work is Java Hibernate. It uses data query for database operations. It used for java application operations. It is an object relational mapping tools. It can perform data creation, data manipulation and data access. Java Hibernate advantages are, - Better performance - Opensource frame work - It can create independent database query - It can create database table automatically - It can access data from different database table - It can create query cache and database status The Java Hibernate architecture contains persistent object, session transaction and factory. Java Hibernate is four layers architecture. They are application layer, frame work layer, API layer and database layer. Java Hibernate can hide object oriented logic details. It can work with java database connectivity. It can create entities based on the business applications. Advanced Java Hibernate can use a data transfer class for different queries. So it can retrieve more number of instances. Java Hibernate avoids the complex join operations. It can manipulate database data without the help of hard coded SQL queries. Java Hibernate performs compilation time syntax check operations. Java Hibernate contains one to one association, one to many association, many to one association and many to many association. It can perform mapping with more complicated objects. The object is the value or entity. It supports java relational database and development of JDBC API. It provides connection between applications of java and database. Java Hibernate can store and retrieve data from database. Java Hibernate generates memory mismatch reference and object inheritance mismatch.
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Hibernate Criteria Query API to do searches and Query By Example
- Introduction to hibernate, The object/relational mapping problem, Jdbc ,Users-roles schema, Tools and environment setup, Creating the database, Configuring hibernate, Hibernate distributions, Required libraries, Configuration files, Hibernate.properties, Hibernate.cfg.xml, Hibernate persistence, Hibernate architecture, Sessionfactory methods, Hibernate sessions, Object states, State transitions, Session methods, Transactions, Session-per-operation, Session-per-request, Data access object pattern, Object/relational mapping, Object-oriented design, Relational mapping, Bidirectional association, O/r mapping techniques, Mapping document, Mapping xml model, Primary keys and identity, Generating identifiers Other mapping elements Components Mapping associations Mapping xml model for associations Unidirectional many-to-one, Eager fetching, Bidirectional one-to-many, Bidirectional one-to-one, Mapping inheritance, Inheritance and databases, Single-table inheritance, Mapping single-table inheritance, Table-per-subclass, Table-per-subclass mapping, Table-per-concrete-class, Hibernate query language, Fundamentals, Hql queries
- Polymorphism, Named parameters, Entity parameters, Joining on associations, Aggregate methods, Updates and deletes, Named queries, Using native sql, Hibernate components, Hibernate architecture, Creating an hibernate application, Creating entities, Configuration files, Orm configuration files, Hibernate.cfg.xml configuration file, Using the hibernate api, Session object, Creating a configuration object, Obtaining a sessionfactory object, Creating the session object, Operations with entities: session object methods, Transactions, Using hibernate with netbeans, Queries and hql, Hql, Basic syntax, Joins, Hql queries: the query interface, Creating a query object, Executing a query, Relationships between entities, Types of relationship, Mapping relationships, One to many and many to one relationships, Object-relational divide, Relationship between sql, jdbc and objects, Bridging the chasm: issues with oo and databases, Mapping persistent classes, From pojo to database, Xml-style mapping, Annotation-style mapping, Hibernate environment, Session manager, Transitive persistence, Dealing with long-running transactions, Locking implications, Advanced mapping, Mapping to collection classes, Managing multiplicity: one-to-many, many-to-many, Custom mapping types, Source files, Creating the sessionfactory, Fetching strategies, The n+1 issue and its solution, Lazy (and aggressive) fetching strategies, Querying data, Using hql
- Using criteria, Incorporating native jdbc and stored procedures, Performance considerations, First- and second-level caching, Monitoring and tuning hibernate-generated sql, Hibernate and jpa, Comparison of hibernate with the java persistence api, Pros and cons of hibernate versus jpa in an ejb 3, Environment, Best of both worlds: hibernate entitymanager, Hibernate tools, Automatic schema generation, Automatic pojo generation, Accommodating existing schemas, Hibernate console and mapping editor, Hibernate:, Technology overview & benefits, Architectural, Jdbc:, Mapping techniques:, Hibernate type system, Object identity, Fine-grained object models, Mapping class inheritance, Compound keys, Mapping collections of value types, Mapping entity associations, Mapping polymorphic associations, Retrieving objects efficiently:, Query features, Hql, criteria, and native sql queries, Advanced, reporting, and dynamic queries, Runtime fetching and query optimization, Data filters, Transactions and concurrency:, Transaction api, Isolation levels, Optimistic and pessimistic locking, Application transactions, Designing hibernate applications:, Designing layered applications, Design model layer, Design dao layer, Design service layer, Events and interceptors, Logging and monitoring,
HCQL (Hibernate Criteria Query Language)
Hibernate Query Language (HQL)