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java.lang.Object org.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 | |
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static java.lang.String |
COLUMN
The column parameter |
static java.lang.String |
DEFAULT_COLUMN_NAME
Default column name |
static java.lang.String |
DEFAULT_TABLE_NAME
Default table name |
static java.lang.String |
TABLE
The table parameter |
Fields inherited from interface org.hibernate.id.PersistentIdentifierGenerator |
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CATALOG, PK, SCHEMA, SQL_STATEMENT_LOGGER, TABLES |
Fields inherited from interface org.hibernate.id.IdentifierGenerator |
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ENTITY_NAME |
Constructor Summary | |
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TableGenerator()
|
Method Summary | |
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void |
configure(Type type,
java.util.Properties params,
Dialect dialect)
Configure this instance, given the value of parameters specified by the user as <param> elements. |
java.io.Serializable |
doWorkInCurrentTransaction(java.sql.Connection conn,
java.lang.String sql)
The work to be done |
java.io.Serializable |
generate(SessionImplementor session,
java.lang.Object object)
Generate a new identifier. |
java.lang.Object |
generatorKey()
Return a key unique to the underlying database objects. |
java.lang.String[] |
sqlCreateStrings(Dialect dialect)
The SQL required to create the underlying database objects. |
java.lang.String[] |
sqlDropStrings(Dialect dialect)
The SQL required to remove the underlying database objects. |
Methods inherited from class org.hibernate.engine.TransactionHelper |
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doWorkInNewTransaction |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final java.lang.String COLUMN
public static final java.lang.String DEFAULT_COLUMN_NAME
public static final java.lang.String TABLE
public static final java.lang.String DEFAULT_TABLE_NAME
Constructor Detail |
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public TableGenerator()
Method Detail |
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public void configure(Type type, java.util.Properties params, Dialect dialect)
Configurable
configure
in interface Configurable
params
- param values, keyed by parameter namepublic java.io.Serializable generate(SessionImplementor session, java.lang.Object object) throws HibernateException
IdentifierGenerator
generate
in interface IdentifierGenerator
object
- the entity or toplevel collection for which the id is being generated
HibernateException
public java.lang.String[] sqlCreateStrings(Dialect dialect) throws HibernateException
PersistentIdentifierGenerator
sqlCreateStrings
in interface PersistentIdentifierGenerator
dialect
- The dialect against which to generate the create command(s)
HibernateException
- problem creating the create command(s)public java.lang.String[] sqlDropStrings(Dialect dialect)
PersistentIdentifierGenerator
sqlDropStrings
in interface PersistentIdentifierGenerator
dialect
- The dialect against which to generate the drop command(s)
public java.lang.Object generatorKey()
PersistentIdentifierGenerator
generatorKey
in interface PersistentIdentifierGenerator
public java.io.Serializable doWorkInCurrentTransaction(java.sql.Connection conn, java.lang.String sql) throws java.sql.SQLException
TransactionHelper
doWorkInCurrentTransaction
in class TransactionHelper
java.sql.SQLException
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