javax.media
类 PackageManager

java.lang.Object
  javax.media.PackageManager

public class PackageManager
extends java.lang.Object

A PackageManager maintains a persistent store of package-prefix lists. A package prefix specifies the prefix for a complete class name. A factory uses a package-prefix list to find a class that might belong to any of the packages that are referenced in the prefix list.

The Manager uses package-prefix lists to find protocol handlers and content handlers for time-based media.

The current version of a package-prefix list is obtained with the get<package-prefix>List method. This method returns the prefix list in use; any changes to the list take effect immediately. Unless it is made persistent with commit<package-prefix>List, a package-prefix list is only valid while the Manager is referenced. The commit<package-prefix>List method ensures that any changes made to a package-prefix list are still visible the next time that the Manager is referenced.

另请参见：

Manager

构造方法摘要

PackageManager()

方法摘要

static void	commitContentPrefixList() Make changes to the content prefix-list persistent.
static void	commitProtocolPrefixList() Make changes to the protocol package-prefix list persistent.
static java.util.Vector	getContentPrefixList() Get the current value of the content package-prefix list.
static java.util.Vector	getProtocolPrefixList() Get the current value of the protocol package-prefix list.
static void	setContentPrefixList(java.util.Vector list) Set the current value of the content package-prefix list.
static void	setProtocolPrefixList(java.util.Vector list) Set the protocol package-prefix list.

从类 java.lang.Object 继承的方法

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

构造方法详细信息

PackageManager

public PackageManager()

方法详细信息

getProtocolPrefixList

public static java.util.Vector getProtocolPrefixList()

Get the current value of the protocol package-prefix list.

返回：

The protocol package-prefix list.

setProtocolPrefixList

public static void setProtocolPrefixList(java.util.Vector list)

Set the protocol package-prefix list. This is required for changes to take effect.

参数：

list - The new package-prefix list to use.

commitProtocolPrefixList

public static void commitProtocolPrefixList()

Make changes to the protocol package-prefix list persistent.

This method throws a SecurityException if the calling thread does not have access to system properties.

getContentPrefixList

public static java.util.Vector getContentPrefixList()

Get the current value of the content package-prefix list. Any changes made to this list take effect immediately.

返回：

The content package-prefix list.

setContentPrefixList

public static void setContentPrefixList(java.util.Vector list)

Set the current value of the content package-prefix list. This is required for changes to take effect.

参数：

list - The content package-prefix list to set.

commitContentPrefixList

public static void commitContentPrefixList()

Make changes to the content prefix-list persistent.

This method throws a SecurityException if the calling thread does not have access to system properties.