TableHiLoGenerator (Hibernate API Documentation) - Hibernate 2.1.8 正式版 API 英文文档

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net.sf.hibernate.id
Class TableHiLoGenerator

java.lang.Object
  net.sf.hibernate.id.TableGenerator
      net.sf.hibernate.id.TableHiLoGenerator

All Implemented Interfaces:: Configurable, IdentifierGenerator, PersistentIdentifierGenerator

public class TableHiLoGenerator
extends TableGenerator

hilo

An IdentifierGenerator that returns a Long, constructed using a hi/lo algorithm. 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 from an application server datasource or when the user is supplying connections. In these cases a SequenceHiLoGenerator would be a better choice (where supported).

Mapping parameters supported: table, column, max_lo

Author:: Gavin King
See Also:: SequenceHiLoGenerator

Field Summary

static String MAX_LO
          The max_lo parameter

Fields inherited from class net.sf.hibernate.id.TableGenerator

COLUMN, TABLE

Fields inherited from interface net.sf.hibernate.id.PersistentIdentifierGenerator

PK, SCHEMA

Constructor Summary

TableHiLoGenerator()


Method Summary

void configure(Type type, Properties params, Dialect d)
          Configure this instance, given the value of parameters specified by the user as <param> elements.

Serializable generate(SessionImplementor session, Object obj)
          Generate a new identifier.

Methods inherited from class net.sf.hibernate.id.TableGenerator

generatorKey, sqlCreateStrings, sqlDropString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAX_LO

public static final String MAX_LO

The max_lo parameter

See Also:: Constant Field Values

Constructor Detail