Class UUIDKeyGeneratorFactory
- java.lang.Object
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- org.castor.cpa.persistence.sql.keygen.UUIDKeyGeneratorFactory
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- All Implemented Interfaces:
KeyGeneratorFactory
public final class UUIDKeyGeneratorFactory extends java.lang.Object implements KeyGeneratorFactory
UUID key generator factory. The short name of this key generator is "UUID".
It uses the following alrorithm: The uuid is a combination of the IP address, the current time in milliseconds since 1970 and a static counter. The complete key consists of a 30 character fixed length string.
Brief statement: The IP only exists once during runtime of castor, the current time in milliseconds (updated every 55 mills) is in combination to the IP pretty unique. Considering a static counter will be used a database-wide unique key will be created.- Version:
- $Revision: 8334 $ $Date: 2006-04-25 15:08:23 -0600 (Tue, 25 Apr 2006) $
- Author:
- Thomas Fach, Ralf Joachim
- See Also:
UUIDKeyGenerator
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Constructor Summary
Constructors Constructor Description UUIDKeyGeneratorFactory()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description KeyGenerator
getKeyGenerator(PersistenceFactory factory, java.util.Properties params, int sqlType)
Produce the key generator.java.lang.String
getKeyGeneratorName()
Get the short name of the key generator.
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Method Detail
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getKeyGeneratorName
public java.lang.String getKeyGeneratorName()
Get the short name of the key generator. It is used to reference key generators in a mapping configuration file. If several key generators of the same type are used for the same database, then they are referenced by aliases.- Specified by:
getKeyGeneratorName
in interfaceKeyGeneratorFactory
- Returns:
- Name of the
KeyGenerator
used to identify key generator (types).
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getKeyGenerator
public KeyGenerator getKeyGenerator(PersistenceFactory factory, java.util.Properties params, int sqlType) throws MappingException
Produce the key generator.- Specified by:
getKeyGenerator
in interfaceKeyGeneratorFactory
- Parameters:
factory
- Helper object for obtaining database-specific QuerySyntax.params
- Parameters for key generator.sqlType
- The SQL type of the primary key, the generated identities must have the corresponding Java type, e.g. java.sql.Types.INTEGER corresponds to java.lang.Integer, java.sql.Types.NUMERIC corresponds to java.lang.BigDecimal.- Returns:
- A
KeyGenerator
instance. - Throws:
MappingException
- If there's a problem resolving the mapping information.
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