ServiceContextpublic abstract class ServiceContext extends Object
|Base class for all ServiceContext classes.
There is a derived ServiceContext class for each service context that
the ORB supports. Each subclass encapsulates the representation of
the service context and provides any needed methods for manipulating
the service context. Each subclass must provide the following
a public static final int SERVICE_CONTEXT_ID that gives the OMG
(or other) defined id for the service context. This is needed for the
registration mechanism defined in ServiceContexts. OMG defined
service context ids are taken from section 13.6.7 of ptc/98-12-04.
- a public constructor that takes an InputStream as its argument.
- Appropriate definitions of getId() and writeData(). getId() must
The subclass can be constructed either directly from the service context
representation, or by reading the representation from an input stream.
These cases are needed when the service context is created and written to
the request or reply, and when the service context is read from the
received request or reply.
|protected InputStream||inin is the stream containing the service context representation.
It is constructed by the stream constructor, and available for use
in the subclass stream constructor.|
Simple default constructor used when subclass is constructed
from its representation.
|protected ServiceContext(InputStream s, GIOPVersion gv)|
Stream constructor used when subclass is constructed from an
InputStream. This constructor must be called by super( stream )
in the subclass. After this constructor completes, the service
context representation can be read from in.
Note that the service context id has been consumed from the input
stream before this object is constructed.
in = s;
|private void||dprint(java.lang.String msg)|
ORBUtility.dprint( this, msg ) ;
|public abstract int||getId()|
Returns Service context id. Must be overloaded in subclass.
return "ServiceContext[ id=" + getId() + " ]" ;
|public void||write(org.omg.CORBA_2_3.portable.OutputStream s, com.sun.corba.se.spi.ior.iiop.GIOPVersion gv)|
Write the service context to an output stream. This method
must be used for writing the service context to a request or reply
EncapsOutputStream os = new EncapsOutputStream( (ORB)(s.orb()), gv ) ;
writeData( os ) ;
byte data = os.toByteArray() ;
s.write_octet_array(data, 0, data.length);
|protected abstract void||writeData(org.omg.CORBA_2_3.portable.OutputStream os)|
Writes the data used to represent the subclasses service context
into an encapsulation stream. Must be overloaded in subclass.