程序包 ohos.bundle

类 BackupBundleInfo

java.lang.Object

ohos.bundle.BackupBundleInfo

所有已实现的接口:

Sequenceable

public class BackupBundleInfo
extends Object
implements Sequenceable

Backs up information about an application, including its bundle name and version code.

The bundleName attribute must have been configured in the config.json file.

从以下版本开始:

4

嵌套类概要

从接口继承的嵌套类/接口 ohos.utils.Sequenceable

Sequenceable.Producer<T>

字段概要

字段

限定符和类型	字段	说明
static Sequenceable.Producer<BackupBundleInfo>	PRODUCER	Creates a BackupBundleInfo instance from a Parcel.

构造器概要

构造器

构造器	说明
BackupBundleInfo()	Default constructor used to create an BackupBundleInfo instance.
BackupBundleInfo(String bundleName, int versionCode)	A constructor used to create an BackupBundleInfo instance by bundleName and versionCode.

方法概要

限定符和类型	方法	说明
boolean	equals(Object obj)	Indicates whether some other object is "equal to" this one.
String	getBundleName()	Obtains the bundle name of the application to back up.
int	getVersionCode()	Obtains the version code of the application to back up.
boolean	hasFileDescriptor()	Checks whether the implementation class of this Sequenceable contains FileDescriptor object data.
int	hashCode()	Returns a hash code value for the object.
boolean	marshalling(Parcel out)	Marshals this Sequenceable object into a Parcel.
String	toString()	Returns a string representation of the object.
boolean	unmarshalling(Parcel in)	Unmarshals this Sequenceable object from a Parcel.

从类继承的方法 java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

字段详细资料

PRODUCER

public static final Sequenceable.Producer<BackupBundleInfo> PRODUCER

Creates a BackupBundleInfo instance from a Parcel.

从以下版本开始:

4

构造器详细资料

BackupBundleInfo

public BackupBundleInfo()

Default constructor used to create an BackupBundleInfo instance.

从以下版本开始:

4

BackupBundleInfo

public BackupBundleInfo(String bundleName,
                        int versionCode)

A constructor used to create an BackupBundleInfo instance by bundleName and versionCode.

参数:

bundleName - bundleName for this instance.

versionCode - versionCode for this instance.

从以下版本开始:

4

方法详细资料

marshalling

public boolean marshalling(Parcel out)

从接口复制的说明: Sequenceable

Marshals this Sequenceable object into a Parcel.

指定者:

marshalling 在接口中 Sequenceable

参数:

out - Indicates the Parcel object to which the Sequenceable object will be marshaled..

返回:

Returns true if the marshalling is successful; returns false otherwise.

unmarshalling

public boolean unmarshalling(Parcel in)

从接口复制的说明: Sequenceable

Unmarshals this Sequenceable object from a Parcel.

指定者:

unmarshalling 在接口中 Sequenceable

参数:

in - Indicates the Parcel object into which the Sequenceable object has been marshaled.

返回:

Returns true if the unmarshalling is successful; returns false otherwise.

hasFileDescriptor

public boolean hasFileDescriptor()

从接口复制的说明: Sequenceable

Checks whether the implementation class of this Sequenceable contains FileDescriptor object data.

If the custom Sequenceable class contains any FileDescriptor data, you should override this method. This method return false by default.

指定者:

hasFileDescriptor 在接口中 Sequenceable

返回:

Returns true if it contains FileDescriptor data; returns false otherwise.

getBundleName

public String getBundleName()

Obtains the bundle name of the application to back up.

返回:

Returns the application bundle name.

从以下版本开始:

4

getVersionCode

public int getVersionCode()

Obtains the version code of the application to back up.

返回:

Returns the application version code.

从以下版本开始:

4

toString

public String toString()

从类复制的说明: Object

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

 getClass().getName() + '@' + Integer.toHexString(hashCode())
 

覆盖:

toString 在类中 Object

返回:

a string representation of the object.

equals

public boolean equals(Object obj)

从类复制的说明: Object

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

• It is reflexive: for any non-null reference value x, x.equals(x) should return true.
• It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
• It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
• It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
• For any non-null reference value x, x.equals(null) should return false.

The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference values x and y, this method returns true if and only if x and y refer to the same object (x == y has the value true).

Note that it is generally necessary to override the hashCode method whenever this method is overridden, so as to maintain the general contract for the hashCode method, which states that equal objects must have equal hash codes.

覆盖:

equals 在类中 Object

参数:

obj - the reference object with which to compare.

返回:

true if this object is the same as the obj argument; false otherwise.

另请参阅:

Object.hashCode(), HashMap

hashCode

public int hashCode()

从类复制的说明: Object

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by HashMap.

The general contract of hashCode is:

• Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
• If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result.
• It is not required that if two objects are unequal according to the Object.equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java™ programming language.)

覆盖:

hashCode 在类中 Object

返回:

a hash code value for this object.

另请参阅:

Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)