程序包 ohos.data.usage

类 CachePolicy

java.lang.Object

ohos.data.usage.CachePolicy

public class CachePolicy
extends Object

Provides methods for setting cache policies.

从以下版本开始:

4

构造器概要

构造器

构造器	说明
CachePolicy()

方法概要

限定符和类型	方法	说明
boolean	isCacheCleanXattr(File object)	Checks whether a specified cache directory object has the cacheClean extended attribute.
boolean	isCacheDeleteXattr(File object)	Checks whether a specified cache directory object has the cacheDelete extended attribute.
void	removeCacheCleanXattr(File object)	Deletes the cacheClean extended attribute from a specified cache directory object.
void	removeCacheDeleteXattr(File object)	Deletes the cacheDelete extended attribute from a specified cache directory object.
void	setCacheCleanXattr(File object)	Adds the cacheClean extended attribute to a specified cache directory object.
void	setCacheDeleteXattr(File object)	Adds the cacheDelete extended attribute to a specified cache directory object.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

CachePolicy

public CachePolicy()

方法详细资料

setCacheDeleteXattr

public void setCacheDeleteXattr(File object)
                         throws IOException

Adds the cacheDelete extended attribute to a specified cache directory object.

参数:

object - Indicates the cache directory object.

抛出:

IOException - Throws this exception if object is invalid or a native exception occurs.

从以下版本开始:

4

removeCacheDeleteXattr

public void removeCacheDeleteXattr(File object)
                            throws IOException

Deletes the cacheDelete extended attribute from a specified cache directory object.

参数:

object - Indicates the cache directory object.

抛出:

IOException - Throws this exception if object is invalid or a native exception occurs.

从以下版本开始:

4

isCacheDeleteXattr

public boolean isCacheDeleteXattr(File object)
                           throws IOException

Checks whether a specified cache directory object has the cacheDelete extended attribute.

参数:

object - Indicates the cache directory object.

返回:

Returns true if the cache directory object has the cacheDelete extended attribute; returns false otherwise.

抛出:

IOException - Throws this exception if object is invalid or a native exception occurs.

从以下版本开始:

4

setCacheCleanXattr

public void setCacheCleanXattr(File object)
                        throws IOException

Adds the cacheClean extended attribute to a specified cache directory object.

参数:

object - Indicates the cache directory object.

抛出:

IOException - Throws this exception if object is invalid or a native exception occurs.

从以下版本开始:

4

removeCacheCleanXattr

public void removeCacheCleanXattr(File object)
                           throws IOException

Deletes the cacheClean extended attribute from a specified cache directory object.

参数:

object - Indicates the cache directory object.

抛出:

IOException - Throws this exception if object is invalid or a native exception occurs.

从以下版本开始:

4

isCacheCleanXattr

public boolean isCacheCleanXattr(File object)
                          throws IOException

Checks whether a specified cache directory object has the cacheClean extended attribute.

参数:

object - Indicates the cache directory object.

返回:

Returns true if the cache directory object has the cacheClean extended attribute; returns false otherwise.

抛出:

IOException - Throws this exception if object is invalid or a native exception occurs.

从以下版本开始:

4