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java.lang.Objectorg.hibernate.engine.TransactionHelper
org.hibernate.id.TableGenerator
public class TableGenerator
An IdentifierGenerator that uses a database
table to store the last generated value. It is not
intended that applications use this strategy directly.
However, it may be used to build other (efficient)
strategies. The returned type is Integer.
The hi value MUST be fetched in a seperate transaction
to the Session transaction so the generator must
be able to obtain a new connection and commit it. Hence
this implementation may not be used when Hibernate is
fetching connections when the user is supplying
connections.
The returned value is of type integer.
Mapping parameters supported: table, column
TableHiLoGenerator| Field Summary | |
|---|---|
static String |
COLUMN
The column parameter |
static String |
DEFAULT_COLUMN_NAME
Default column name |
static String |
DEFAULT_TABLE_NAME
Default table name |
static String |
TABLE
The table parameter |
| Fields inherited from interface org.hibernate.id.PersistentIdentifierGenerator |
|---|
CATALOG, PK, SCHEMA, SQL, TABLES |
| Fields inherited from interface org.hibernate.id.IdentifierGenerator |
|---|
ENTITY_NAME |
| Constructor Summary | |
|---|---|
TableGenerator()
|
|
| Method Summary | |
|---|---|
void |
configure(Type type,
Properties params,
Dialect dialect)
Configure this instance, given the value of parameters specified by the user as <param> elements. |
Serializable |
doWorkInCurrentTransaction(Connection conn,
String sql)
The work to be done |
Serializable |
generate(SessionImplementor session,
Object object)
Generate a new identifier. |
Object |
generatorKey()
Return a key unique to the underlying database objects. |
String[] |
sqlCreateStrings(Dialect dialect)
The SQL required to create the underlying database objects. |
String[] |
sqlDropStrings(Dialect dialect)
The SQL required to remove the underlying database objects. |
| Methods inherited from class org.hibernate.engine.TransactionHelper |
|---|
doWorkInNewTransaction |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
public static final String COLUMN
public static final String DEFAULT_COLUMN_NAME
public static final String TABLE
public static final String DEFAULT_TABLE_NAME
| Constructor Detail |
|---|
public TableGenerator()
| Method Detail |
|---|
public void configure(Type type,
Properties params,
Dialect dialect)
Configurable
configure in interface Configurableparams - param values, keyed by parameter name
public Serializable generate(SessionImplementor session,
Object object)
throws HibernateException
IdentifierGenerator
generate in interface IdentifierGeneratorobject - the entity or toplevel collection for which the id is being generated
HibernateExceptionpublic String[] sqlCreateStrings(Dialect dialect)
PersistentIdentifierGenerator
sqlCreateStrings in interface PersistentIdentifierGeneratorpublic String[] sqlDropStrings(Dialect dialect)
PersistentIdentifierGenerator
sqlDropStrings in interface PersistentIdentifierGeneratorpublic Object generatorKey()
PersistentIdentifierGenerator
generatorKey in interface PersistentIdentifierGenerator
public Serializable doWorkInCurrentTransaction(Connection conn,
String sql)
throws SQLException
TransactionHelper
doWorkInCurrentTransaction in class TransactionHelperSQLException
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