PersistenceContextType (Java EE 5 SDK)

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Java EE 5 SDK

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摘要: 嵌套 | ENUM 构造器 | 字段 | 方法

详细信息: ENUM 构造器 | 字段 | 方法

javax.persistence Enum PersistenceContextType

java.lang.Object
  java.lang.Enum<PersistenceContextType>
      javax.persistence.PersistenceContextType

所有已实现的接口:: Serializable, Comparable<PersistenceContextType>

public enum PersistenceContextType
extends Enum<PersistenceContextType>

Specifies whether a transaction-scoped or extended persistence context is to be used in PersistenceContext. If the type element is not specified, a transaction-scoped persistence context is used.

从以下版本开始:: Java Persistence 1.0

Enum 常量摘要
`EXTENDED` Extended persistence context
`TRANSACTION` Transaction-scoped persistence context

方法摘要
`static PersistenceContextType`	`valueOf(String name)` Returns the enum constant of this type with the specified name.
`static PersistenceContextType[]`	`values()` Returns an array containing the constants of this enum type, in the order they're declared.

类方法继承 java.lang.Enum
`clone, compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf`

类方法继承 java.lang.Object
`finalize, getClass, notify, notifyAll, wait, wait, wait`

Enum 常量详细信息

TRANSACTION

public static final PersistenceContextType TRANSACTION

Transaction-scoped persistence context

EXTENDED

public static final PersistenceContextType EXTENDED

Extended persistence context

方法详细信息

values

public static final PersistenceContextType[] values()

Returns an array containing the constants of this enum type, in the order they're declared. This method may be used to iterate over the constants as follows:

for(PersistenceContextType c : PersistenceContextType.values())
        System.out.println(c);

返回:: an array containing the constants of this enum type, in the order they're declared

valueOf

public static PersistenceContextType valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

参数:: name - the name of the enum constant to be returned.
返回:: the enum constant with the specified name
抛出异常:: IllegalArgumentException - if this enum type has no constant with the specified name

概述