程序包 org.hibernate

枚举 FlushMode

java.lang.Object

java.lang.Enum<FlushMode>

org.hibernate.FlushMode

所有已实现的接口:

Serializable, Comparable<FlushMode>

public enum FlushMode
extends Enum<FlushMode>

Represents a flushing strategy. The flush process synchronizes database state with session state by detecting state changes and executing SQL statements.

作者:

Gavin King

另请参阅:

Session.setFlushMode(FlushMode), Query.setFlushMode(FlushMode), Criteria.setFlushMode(FlushMode)

枚举常量概要

枚举常量

枚举常量	说明
ALWAYS	The Session is flushed before every query.
AUTO	The Session is sometimes flushed before query execution in order to ensure that queries never return stale state.
COMMIT	The Session is flushed when EntityTransaction.commit() is called.
MANUAL	The Session is only ever flushed when Session.flush() is explicitly called by the application.

方法概要

修饰符和类型	方法	说明
static FlushMode	interpretExternalSetting(String externalName)	Interprets an external representation of the flush mode.
static boolean	isManualFlushMode(FlushMode mode)	已过时。 Just use equality check against MANUAL.
boolean	lessThan(FlushMode other)	Checks to see if this flush mode is less than the given flush mode.
static FlushMode	valueOf(String name)	返回带有指定名称的该类型的枚举常量。
static FlushMode[]	values()	按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。

从类继承的方法 java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

枚举常量详细资料

MANUAL

public static final FlushMode MANUAL

The Session is only ever flushed when Session.flush() is explicitly called by the application. This mode is very efficient for read only transactions.

COMMIT

public static final FlushMode COMMIT

The Session is flushed when EntityTransaction.commit() is called.

AUTO

public static final FlushMode AUTO

The Session is sometimes flushed before query execution in order to ensure that queries never return stale state. This is the default flush mode.

ALWAYS

public static final FlushMode ALWAYS

The Session is flushed before every query. This is almost always unnecessary and inefficient.

方法详细资料

values

public static FlushMode[] values()

按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示:

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

返回:

按照声明该枚举类型的常量的顺序返回的包含这些常量的数组

valueOf

public static FlushMode valueOf(String name)

返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量

NullPointerException - 如果参数为空值

lessThan

public boolean lessThan(FlushMode other)

Checks to see if this flush mode is less than the given flush mode.

参数:

other - THe flush mode value to be checked against this

返回:

true indicates other is less than this; false otherwise

isManualFlushMode

@Deprecated
public static boolean isManualFlushMode(FlushMode mode)

已过时。

Just use equality check against MANUAL. Legacy from before this was an enum

Checks to see if the given mode is the same as MANUAL.

参数:

mode - The mode to check

返回:

true/false

interpretExternalSetting

public static FlushMode interpretExternalSetting(String externalName)

Interprets an external representation of the flush mode. null is returned as null, otherwise valueOf(String) is used with the upper-case version of the incoming value. An unknown, non-null value results in a MappingException being thrown.

参数:

externalName - The external representation

返回:

The interpreted FlushMode value.

抛出:

MappingException - Indicates an unrecognized external representation