程序包 org.hibernate.id

类 IdentifierGeneratorHelper

java.lang.Object

org.hibernate.id.IdentifierGeneratorHelper

public final class IdentifierGeneratorHelper
extends Object

Factory and helper methods for IdentifierGenerator framework.

作者:

Gavin King, Steve Ebersole

嵌套类概要

嵌套类

修饰符和类型	类	说明
static class	IdentifierGeneratorHelper.BasicHolder
static class	IdentifierGeneratorHelper.BigDecimalHolder
static class	IdentifierGeneratorHelper.BigIntegerHolder

字段概要

字段

修饰符和类型	字段	说明
static Serializable	POST_INSERT_INDICATOR	Marker object returned from IdentifierGenerator.generate(org.hibernate.engine.spi.SharedSessionContractImplementor, java.lang.Object) to indicate that the entity's identifier will be generated as part of the database insertion.
static Serializable	SHORT_CIRCUIT_INDICATOR	Marker object returned from IdentifierGenerator.generate(org.hibernate.engine.spi.SharedSessionContractImplementor, java.lang.Object) to indicate that we should short-circuit any continued generated id checking.

方法概要

修饰符和类型	方法	说明
static Number	createNumber(long value, Class clazz)	已过时。 Use the holders instead.
static BigDecimal	extractBigDecimal(IntegralDataTypeHolder holder)
static BigInteger	extractBigInteger(IntegralDataTypeHolder holder)
static long	extractLong(IntegralDataTypeHolder holder)
static Serializable	get(ResultSet rs, String identifier, Type type, Dialect dialect)	Extract the value from the result set (which is assumed to already have been positioned to the appropriate row) and wrp it in the appropriate Java numeric type.
static Serializable	getGeneratedIdentity(ResultSet rs, String identifier, Type type, Dialect dialect)	Get the generated identifier when using identity columns
static IntegralDataTypeHolder	getIntegralDataTypeHolder(Class integralType)

从类继承的方法 java.lang.Object

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

字段详细资料

SHORT_CIRCUIT_INDICATOR

public static final Serializable SHORT_CIRCUIT_INDICATOR

Marker object returned from IdentifierGenerator.generate(org.hibernate.engine.spi.SharedSessionContractImplementor, java.lang.Object) to indicate that we should short-circuit any continued generated id checking. Currently this is only used in the case of the foreign generator as a way to signal that we should use the associated entity's id value.

POST_INSERT_INDICATOR

public static final Serializable POST_INSERT_INDICATOR

Marker object returned from IdentifierGenerator.generate(org.hibernate.engine.spi.SharedSessionContractImplementor, java.lang.Object) to indicate that the entity's identifier will be generated as part of the database insertion.

方法详细资料

getGeneratedIdentity

public static Serializable getGeneratedIdentity(ResultSet rs,
                                                String identifier,
                                                Type type,
                                                Dialect dialect)
                                         throws SQLException,
                                                HibernateException

Get the generated identifier when using identity columns

参数:

rs - The result set from which to extract the the generated identity.

identifier - The name of the identifier column

type - The expected type mapping for the identity value.

dialect - The current database dialect.

返回:

The generated identity value

抛出:

SQLException - Can be thrown while accessing the result set

HibernateException - Indicates a problem reading back a generated identity value.

get

public static Serializable get(ResultSet rs,
                               String identifier,
                               Type type,
                               Dialect dialect)
                        throws SQLException,
                               IdentifierGenerationException

Extract the value from the result set (which is assumed to already have been positioned to the appropriate row) and wrp it in the appropriate Java numeric type.

参数:

rs - The result set from which to extract the value.

identifier - The name of the identifier column

type - The expected type of the value.

dialect - The current database dialect.

返回:

The extracted value.

抛出:

SQLException - Indicates problems access the result set

IdentifierGenerationException - Indicates an unknown type.

createNumber

@Deprecated
public static Number createNumber(long value,
                                  Class clazz)
                           throws IdentifierGenerationException

已过时。

Use the holders instead.

Wrap the given value in the given Java numeric class.

参数:

value - The primitive value to wrap.

clazz - The Java numeric type in which to wrap the value.

返回:

The wrapped type.

抛出:

IdentifierGenerationException - Indicates an unhandled 'clazz'.

getIntegralDataTypeHolder

public static IntegralDataTypeHolder getIntegralDataTypeHolder(Class integralType)

extractLong

public static long extractLong(IntegralDataTypeHolder holder)

extractBigInteger

public static BigInteger extractBigInteger(IntegralDataTypeHolder holder)

extractBigDecimal

public static BigDecimal extractBigDecimal(IntegralDataTypeHolder holder)