```
public abstract class POAHelper
extends Object
```
A POA object manages the implementation of a collection of objects. The POA supports a name space for the objects, which are identified by Object Ids. A POA also provides a name space for POAs. A POA is created as a child of an existing POA, which forms a hierarchy starting with the root POA. A POA object must not be exported to other processes, or externalized with ORB::object_to_string.

构造方法
Constructor	描述
`POAHelper()`

所有方法静态方法具体的方法
Modifier and Type	方法	描述
`static POA`	`extract(Any a)`
`static String`	`id()`
`static void`	`insert(Any a, POA that)`
`static POA`	`narrow(Object obj)`
`static POA`	`read(InputStream istream)`
`static TypeCode`	`type()`
`static void`	`write(OutputStream ostream, POA value)`

public static void insert(Any a,
                          POA that)

public static POA read(InputStream istream)

public static void write(OutputStream ostream,
                         POA value)

public static POA narrow(Object obj)

Class POAHelper