0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
What is the advantage of hibernate in j2ee?
Hibernate is capable of mapping all Object Oriented relationships (such as inheritance,interfaces, associations, composition, ternary associations) between objects. Hibernate follows both Bottom-up (existing database to OO model) and Top-down (OOModel to design the database schema) approaches: asanthine s
How does hibernate work in java?
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. Hibernate solves object-relational impedance mismatch problems by replacing direct persistence-related database accesses with high-level object handling functions.Hibernate is free as open source software that is distributed under the GNU Lesser General Public License.Rather than utilize bytecode processing or code generation, Hibernate uses runtime reflection todetermine the persistent properties of a class. The objects to be persisted are defined in amapping document, which serves to describe the persistent fields and associations, as well as anysubclasses or proxies of the persistent object. The mapping documents are compiled atapplication startup time and provide the framework with necessary information for a class.Additionally, they are used in support operations, such as generating the database schema orcreating stub Java source files.Hibernate's primary feature is mapping from Java classes to database tables (and from Java data types to SQL data types). Hibernate also provides data query and retrieval facilities. Hibernate generates the SQL calls and relieves the developer from manual result set handling and object conversion, keeping the application portable to all supported SQL databases, with database portability delivered at very little performance overhead.MappingMapping Java classes to database table is accomplished through the configuration of an XML file or by using Java Annotation. When using an XML file, Hibernate can generate skeletal source code for the persistence classes. This is unnecessary when annotation is used. Hibernate can use the XML file or the annotation to maintain the database schema. Facilities to arrange one-to-many and many-to-many relationships between classes are provided. In addition to managing association between objects, Hibernate can also manage reflexive associations where an object has a one-to-many relationship with other instances of its own type.Hibernate supports the mapping of custom value types. This makes the following scenarios possible:Overriding the default SQL type that Hibernate chooses when mapping a column to a propertyMapping Java Enum to columns as if they were regular propertiesMapping a single property to multiple columnsPersistenceHibernate provides transparent persistence for Plain Old Java Objects (POJOs). The only strict requirement for a persistent class is a no-argument constructor, not compulsorily public. Proper behavior in some applications also requires special attention to the equals() and hashCode() methods. Collections of data objects are typically stored in Java collection objects such as Set and List. Java Generics can be used in Java 5 and higher. Hibernate can be configured to lazy load associated collections. Lazy loading is the default as of Hibernate 3.Related objects can be configured to cascade operations from one to the other. For example, a parent such as an Album object can be configured to cascade its save and/or delete operation to its child Track objects. This can reduce development time and ensure referential integrity. A dirty checkingfeature avoids unnecessary database write actions by performing SQL updates only on the modified fields of persistent objects.Hibernate Query Language(HQL)Hibernate provides a SQL inspired language called Hibernate Query Language (HQL) which allows SQL-like queries to be written against Hibernate's data objects. Criteria Queries are provided as an object-oriented alternative to HQL. IntegrationHibernate can be used both in standalone Java applications and in Java EE applications using servlets or EJB session beans.
Difference in hibernate 2.0 and hibernate 3.0?
Enhanced Hibernate Query Language Enhanced Hibernate Criteria Query API Enhanced support for queries expressed in the native SQL dialect of the database
What is the use of hibernet in Java?
Hibernate is a framework in Java and J2EE which is used to connect to the database in Enterprise class applications. Actually Hibernate is too big a topic to elaborate in one answer but it is used to connect to databases and retrieve/update values. The benefit is that, we need not manually write queries like we do in normal Java database connectivity. Instead hibernate takes care of connecting to the database and picking up or updating the values we need. It does this with the help of hibernate mapping files which are xml files that represent the database schema which we intend on retrieving or updating.
What is the number that compares part of an object or set with the whole object or set called?
You may be reaching for "fraction".
Why hibernate technology called hibernate?
Hibernate nothing but persisting the data or saving the content nonvolatile. Hibernate methodology convert the database queries to object,perform the operation and persist the result.
What is the partial or total blocking of one object by another?
When one object blocks the other from sight then it is called an eclipse.
What is partial light?
Partial light is when a light (like one coming from a flashlight) is blocked by an object(like a see-through cloth), but can still pass through. (at the end the light ray is weaker, this is called partial light).
What is the penumbra in astronomy?
When a light source is only partially blocked and there is only a partial shadow on an object.
What is the advantage of hibernate in j2ee?
Hibernate is capable of mapping all Object Oriented relationships (such as inheritance,interfaces, associations, composition, ternary associations) between objects. Hibernate follows both Bottom-up (existing database to OO model) and Top-down (OOModel to design the database schema) approaches: asanthine s
Do cockrooachs hibernate?
No cockroaches do not hibernate. Bugs them selves do not hibernate.
Does hippo hibernate?
No, they do not hibernate.
Do martens hibernate?
no they do not hibernate
Do spotted bobcats hibernate?
No, they do not hibernate. Felines as a species doesn't hibernate.
How does a bald eagle hibernate?
Eagles do not hibernate. Birds don't hibernate.
Do kinkajous hibernate?
Kookaburras do not hibernate. No birds in Australia hibernate.
When animals hibernate?
They hibernate in winter
