java.lang.Object
- java.lang.Enum<FetchStyle>
- - org.hibernate.engine.FetchStyle

所有已实现的接口:

Serializable, Comparable<FetchStyle>
```
public enum FetchStyle
extends Enum<FetchStyle>
```
Enumeration of values describing HOW fetching should occur.

作者:

Steve Ebersole

另请参阅:

FetchTiming

枚举常量概要

枚举常量
枚举常量	说明
`BATCH`	Initializes a number of indicated data items (entities or collections) in a series of grouped sql selects using an in-style sql restriction to define the batch size.
`JOIN`	Inherently an eager style of fetching.
`SELECT`	Performs a separate SQL select to load the indicated data.
`SUBSELECT`	Performs fetching of associated data (currently limited to only collections) based on the sql restriction used to load the owner.

方法概要

所有方法静态方法具体方法
修饰符和类型	方法	说明
`static FetchStyle`	`valueOf(String name)`	返回带有指定名称的该类型的枚举常量。
`static FetchStyle[]`	`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
  - SELECT
```
public static final FetchStyle SELECT
```
    Performs a separate SQL select to load the indicated data. This can either be eager (the second select is issued immediately) or lazy (the second select is delayed until the data is needed).
  - JOIN
```
public static final FetchStyle JOIN
```
    Inherently an eager style of fetching. The data to be fetched is obtained as part of an SQL join.
  - BATCH
```
public static final FetchStyle BATCH
```
    Initializes a number of indicated data items (entities or collections) in a series of grouped sql selects using an in-style sql restriction to define the batch size. Again, can be either eager or lazy.
  - SUBSELECT
```
public static final FetchStyle SUBSELECT
```
    Performs fetching of associated data (currently limited to only collections) based on the sql restriction used to load the owner. Again, can be either eager or lazy.
- 方法详细资料
  - values
```
public static FetchStyle[] 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 (FetchStyle c : FetchStyle.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 FetchStyle 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

枚举 FetchStyle

枚举常量概要

方法概要

从类继承的方法 java.lang.Enum

从类继承的方法 java.lang.Object

枚举常量详细资料

SELECT

JOIN

BATCH

SUBSELECT

方法详细资料

values

valueOf