程序包 org.hibernate.graph

枚举 GraphSemantic

java.lang.Object

java.lang.Enum<GraphSemantic>

org.hibernate.graph.GraphSemantic

所有已实现的接口:

Serializable, Comparable<GraphSemantic>

public enum GraphSemantic
extends Enum<GraphSemantic>

JPA defines 2 distinct semantics for applying an EntityGraph. This enumeration captures those 2 semantics.

作者:

Steve Ebersole

枚举常量概要

枚举常量

枚举常量	说明
FETCH	Indicates a "fetch graph" EntityGraph.
LOAD	Indicates a "load graph" EntityGraph.

方法概要

修饰符和类型	方法	说明
static GraphSemantic	fromJpaHintName(String hintName)
String	getJpaHintName()
static GraphSemantic	valueOf(String name)	返回带有指定名称的该类型的枚举常量。
static GraphSemantic[]	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

FETCH

public static final GraphSemantic FETCH

Indicates a "fetch graph" EntityGraph. Attributes explicitly specified as AttributeNodes are treated as FetchType.EAGER (via join fetch or subsequent select). Attributes that are not specified are treated as FetchType.LAZY invariably.

LOAD

public static final GraphSemantic LOAD

Indicates a "load graph" EntityGraph. Attributes explicitly specified as AttributeNodes are treated as FetchType.EAGER (via join fetch or subsequent select). Attributes that are not specified are treated as FetchType.LAZY or FetchType.EAGER depending on the attribute's definition in metadata.

方法详细资料

values

public static GraphSemantic[] 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 (GraphSemantic c : GraphSemantic.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 GraphSemantic 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

getJpaHintName

public String getJpaHintName()

fromJpaHintName

public static GraphSemantic fromJpaHintName(String hintName)