Hibernate

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There are some basic features of Hibernate that are given below:

Automatic primary key generation

1. Multiple synthetic key generation strategies
2. Support for application assigned identifiers
3. Support for application assigned identifiers

High performance

1. Lazy initialization
2. Outer join fetching
3. Batch fetching
4. Support for optimistic locking with versioning/timestamping
5. Highly scalable architecture
6. High performance
7. No "special" database tables
8. SQL generated at system initialization time
9. (Optional) Internal connection pooling and PreparedStatement caching

J2EE integration

1. JMX support
2. Integration with J2EE architecture (optional)
3. New JCA support

Object / Relational mappings

1. Three different O/R mapping strategies
2. Multiple-objects to single-row mapping
3. Polymorphic associations
4. Bidirectional associations
5. Association filtering
6. Collections of basic types
7. Indexed collections
8. Composite Collection Elements
9. Lifecycle objects

Object-oriented query language

1. Powerful object-oriented query language
2. Full support for polymorphic queries
3. New Criteria queries
4. Native SQL queries

Transparent persistence without byte code processing

1. Transparent persistence
2. JavaBeans style properties are persisted
3. No build-time source or byte code generation / processing
4. Support for extensive subset of Java collections API
5. Collection instance management
6. Extensible type system
7. Constraint transparency
8. Automatic Dirty Checking
9. Detached object support

Object/Relational mapping definition

1. XML mapping documents
2. Human-readable format
3. XDoclet support

HDLCA (Hibernate Dual-Layer Cache Architecture)

1. Thread safeness
2. Non-blocking data access
3. Session level cache
4. Optional second-level cache
5. Optional query cache
6. Works well with others

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