CascadeType (Java EE 5 SDK)

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Java EE 5 SDK

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摘要: 嵌套 | ENUM 构造器 | 字段 | 方法

详细信息: ENUM 构造器 | 字段 | 方法

javax.persistence Enum CascadeType

java.lang.Object
  java.lang.Enum<CascadeType>
      javax.persistence.CascadeType

所有已实现的接口:: Serializable, Comparable<CascadeType>

public enum CascadeType
extends Enum<CascadeType>

Defines the set of cascadable operations that are propagated to the associated entity. The value cascade=ALLis equivalent tocascade={PERSIST, MERGE, REMOVE, REFRESH}.

从以下版本开始:: Java Persistence 1.0

Enum 常量摘要
`ALL` Cascade all operations
`MERGE` Cascade merge operation
`PERSIST` Cascade persist operation
`REFRESH` Cascade refresh operation
`REMOVE` Cascade remove operation

方法摘要
`static CascadeType`	`valueOf(String name)` Returns the enum constant of this type with the specified name.
`static CascadeType[]`	`values()` Returns an array containing the constants of this enum type, in the order they're declared.

类方法继承 java.lang.Enum
`clone, compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf`

类方法继承 java.lang.Object
`finalize, getClass, notify, notifyAll, wait, wait, wait`

Enum 常量详细信息

ALL

public static final CascadeType ALL

Cascade all operations

PERSIST

public static final CascadeType PERSIST

Cascade persist operation

MERGE

public static final CascadeType MERGE

Cascade merge operation

REMOVE

public static final CascadeType REMOVE

Cascade remove operation

REFRESH

public static final CascadeType REFRESH

Cascade refresh operation

方法详细信息

values

public static final CascadeType[] values()

Returns an array containing the constants of this enum type, in the order they're declared. This method may be used to iterate over the constants as follows:

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

返回:: an array containing the constants of this enum type, in the order they're declared

valueOf

public static CascadeType valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

参数:: name - the name of the enum constant to be returned.
返回:: the enum constant with the specified name
抛出异常:: IllegalArgumentException - if this enum type has no constant with the specified name

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