程序包 org.hibernate.id

枚举 EntityIdentifierNature

java.lang.Object

java.lang.Enum<EntityIdentifierNature>

org.hibernate.id.EntityIdentifierNature

所有已实现的接口:

Serializable, Comparable<EntityIdentifierNature>

public enum EntityIdentifierNature
extends Enum<EntityIdentifierNature>

Describes the possible natures of an entity-defined identifier.

作者:

Steve Ebersole

枚举常量概要

枚举常量

枚举常量	说明
AGGREGATED_COMPOSITE	Composite identifier mapped to a single entity attribute by means of an actual component class used to aggregate the tuple values.
NON_AGGREGATED_COMPOSITE	What Hibernate used to term an "embedded composite identifier", which is not to be confused with the JPA term embedded.
SIMPLE	A simple identifier.

方法概要

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

SIMPLE

public static final EntityIdentifierNature SIMPLE

A simple identifier. Resolved as a basic type and mapped to a singular, basic attribute. Equivalent of:

• an <id/> mapping
• a single @Id annotation

NON_AGGREGATED_COMPOSITE

public static final EntityIdentifierNature NON_AGGREGATED_COMPOSITE

What Hibernate used to term an "embedded composite identifier", which is not to be confused with the JPA term embedded. Resolved as a tuple of basic type values and mapped over multiple singular attributes. Specifically a composite identifier where there is no single attribute representing the composite value. Equivalent of:

• a <composite-id/> mapping without a specified name XML-attribute (which would name the single identifier attribute
• multiple @Id annotations

NOTE : May or may not have a related "lookup identifier class" as indicated by a @IdClass annotation.

另请参阅:

IdClass

AGGREGATED_COMPOSITE

public static final EntityIdentifierNature AGGREGATED_COMPOSITE

Composite identifier mapped to a single entity attribute by means of an actual component class used to aggregate the tuple values. Equivalent of:

• a <composite-id/> mapping naming a single identifier attribute via the name XML-attribute
• an @EmbeddedId annotation

另请参阅:

EmbeddedId

方法详细资料

values

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