Module java.corba
Package org.omg.CORBA

Class ObjectHolder

  • All Implemented Interfaces:
    Streamable

    public final class ObjectHolder
extends Object
implements Streamable
    The Holder for Object. For more information on Holder files, see "Generated Files: Holder Files".

    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

    • 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.

      • 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.

      • _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.

      • _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