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Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class ObjectHolder - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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org.omg.CORBA
Class ObjectHolder

java.lang.Object
  |
  +--org.omg.CORBA.ObjectHolder

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public final class ObjectHolder

extends Object

implements Streamable

A Holder class for a CORBA object reference (a value of type org.omg.CORBA.Object). It is usually used to store "out" and "inout" parameters in IDL methods. If an IDL method signature has a CORBA Object reference as an "out" or "inout" parameter, the programmer must pass an instance of ObjectHolder as the corresponding parameter in the method invocation; for "inout" parameters, the programmer must also fill the "in" value to be sent to the server. Before the method invocation returns, the ORB will fill in the value corresponding to the "out" value returned from the server.

If myObjectHolder is an instance of ObjectHolder, the value stored in its value field can be accessed with myObjectHolder.value.

Since:

JDK1.2

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Field Summary
Object	value           The Object value held by this ObjectHolder object.

 

Constructor Summary

ObjectHolder()           Constructs a new ObjectHolder object with its value field initialized to null.

ObjectHolder(Object initial)           Constructs a new ObjectHolder object with its value field initialized to the given Object.

 

Method Summary
void	_read(InputStream input)           Reads from input and initalizes the value in this ObjectHolder object with the unmarshalled data.
TypeCode	_type()           Returns the TypeCode corresponding to the value held in this ObjectHolder object
void	_write(OutputStream output)           Marshals to output the value in this ObjectHolder object.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

value

public Object value

The Object value held by this ObjectHolder object.

Constructor Detail

ObjectHolder

public ObjectHolder()

Constructs a new ObjectHolder object with its value field initialized to null.

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ObjectHolder

public ObjectHolder(Object initial)

Constructs a new ObjectHolder object with its value field initialized to the given Object.

Parameters:

initial - the Object with which to initialize the value field of the newly-created ObjectHolder object

Method Detail

_read

public void _read(InputStream input)

Reads from input and initalizes the value in this ObjectHolder object with the unmarshalled data.

Specified by:

_read in interface Streamable

Parameters:

input - the InputStream containing CDR formatted data from the wire.

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_write

public void _write(OutputStream output)

Marshals to output the value in this ObjectHolder object.

Specified by:

_write in interface Streamable

Parameters:

output - the OutputStream which will contain the CDR formatted data.

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_type

public TypeCode _type()

Returns the TypeCode corresponding to the value held in this ObjectHolder object

Specified by:

_type in interface Streamable

Returns:

the TypeCode of the value held in this ObjectHolder object

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