PersistenceContextType (Java EE 5)

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javax.persistence Enum PersistenceContextType

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

All Implemented Interfaces:: Serializable, Comparable<PersistenceContextType>

public enum PersistenceContextType
extends Enum<PersistenceContextType>

Extends: Enum<E>

指定在 PersistenceContext 中使用事务范围的持久性上下文还是扩展的持久性上下文。如果未指定 type 元素，则使用事务范围的持久性上下文。

since

Java Persistence 1.0

英文文档：

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.

Since:: Java Persistence 1.0

Enum Constant Summary
`EXTENDED` Extended persistence context
`TRANSACTION` Transaction-scoped persistence context

Method Summary
`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.

Methods inherited from class java.lang.Enum
`clone, compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf`

Methods inherited from class java.lang.Object
`finalize, getClass, notify, notifyAll, wait, wait, wait`

Enum Constant Detail

英文文档：

EXTENDED

public static final PersistenceContextType EXTENDED

Extended persistence context

Method Detail

final public static PersistenceContextType[] values()

英文文档：
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);

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

public static PersistenceContextType valueOf(String name)

英文文档：
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.)

Parameters:: name - the name of the enum constant to be returned.
Returns:: the enum constant with the specified name
Throws:: IllegalArgumentException - if this enum type has no constant with the specified name