枚举 NotFoundAction
- java.lang.Object
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- java.lang.Enum<NotFoundAction>
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- org.hibernate.annotations.NotFoundAction
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- 所有已实现的接口:
Serializable,Comparable<NotFoundAction>
public enum NotFoundAction extends Enum<NotFoundAction>
Possible actions when an associated entity is not found in the database. Often seen with "legacy" foreign-key schemes which do not useNULLto indicate a missing reference, instead using a "magic value".- 作者:
- Emmanuel Bernard
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枚举常量详细资料
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EXCEPTION
public static final NotFoundAction EXCEPTION
Raise an exception when an element is not found (default and recommended).
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IGNORE
public static final NotFoundAction IGNORE
Ignore the element when not found in database.
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方法详细资料
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values
public static NotFoundAction[] 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 (NotFoundAction c : NotFoundAction.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
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valueOf
public static NotFoundAction 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
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