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package org.omg.CORBA;
/**
* An object that captures the explicit state of a request
* for the Dynamic Skeleton Interface (DSI). This class, the
* cornerstone of the DSI, is analogous to the <code>Request</code>
* object in the DII.
* <P>
* The ORB is responsible for creating this embodiment of a request,
* and delivering it to a Dynamic Implementation Routine (DIR).
* A dynamic servant (a DIR) is created by implementing the
* <code>DynamicImplementation</code> class,
* which has a single <code>invoke</code> method. This method accepts a
* <code>ServerRequest</code> object.
*
* The abstract class <code>ServerRequest</code> defines
* methods for accessing the
* method name, the arguments and the context of the request, as
* well as methods for setting the result of the request either as a
* return value or an exception. <p>
*
* A subtlety with accessing the arguments of the request is that the
* DIR needs to provide type information about the
* expected arguments, since there is no compiled information about
* these. This information is provided through an <code>NVList</code>,
* which is a list of <code>NamedValue</code> objects.
* Each <code>NamedValue</code> object
* contains an <code>Any</code> object, which in turn
* has a <code>TypeCode</code> object representing the type
* of the argument. <p>
*
* Similarly, type information needs to be provided for the response,
* for either the expected result or for an exception, so the methods
* <code>result</code> and <code>except</code> take an <code>Any</code>
* object as a parameter. <p>
*
* @see org.omg.CORBA.DynamicImplementation
* @see org.omg.CORBA.NVList
* @see org.omg.CORBA.NamedValue
*
*/
public abstract class ServerRequest {
/**
* Retrieves the name of the operation being
* invoked. According to OMG IDL's rules, these names must be unique
* among all operations supported by this object's "most-derived"
* interface. Note that the operation names for getting and setting
* attributes are <code>_get_<attribute_name></code>
* and <code>_set_<attribute_name></code>,
* respectively.
*
* @return the name of the operation to be invoked
* @deprecated use operation()
*/
@Deprecated
public String op_name()
{
return operation();
}
/**
* Throws an <code>org.omg.CORBA.NO_IMPLEMENT</code> exception.
* <P>
* Retrieves the name of the operation being
* invoked. According to OMG IDL's rules, these names must be unique
* among all operations supported by this object's "most-derived"
* interface. Note that the operation names for getting and setting
* attributes are <code>_get_<attribute_name></code>
* and <code>_set_<attribute_name></code>,
* respectively.
*
* @return the name of the operation to be invoked
* @see <a href="package-summary.html#unimpl"><code>CORBA</code>
* package comments for unimplemented features</a>
*/
public String operation()
{
throw new org.omg.CORBA.NO_IMPLEMENT();
}
/**
* Specifies method parameter types and retrieves "in" and "inout"
* argument values.
* <P>
* Note that this method is deprecated; use the method
* <code>arguments</code> in its place.
* <P>
* Unless it calls the method <code>set_exception</code>,
* the DIR must call this method exactly once, even if the
* method signature contains no parameters. Once the method <code>
* arguments</code> or <code>set_exception</code>
* has been called, calling <code>arguments</code> on the same
* <code>ServerRequest</code> object
* will result in a <code>BAD_INV_ORDER</code> system exception.
* The DIR must pass in to the method <code>arguments</code>
* an NVList initialized with TypeCodes and Flags
* describing the parameter types for the operation, in the order in which
* they appear in the IDL specification (left to right). A
* potentially-different NVList will be returned from
* <code>arguments</code>, with the
* "in" and "inout" argument values supplied. If it does not call
* the method <code>set_exception</code>,
* the DIR must supply the returned NVList with return
* values for any "out" arguments before returning, and may also change
* the return values for any "inout" arguments.
*
* @param params the arguments of the method, in the
* form of an <code>NVList</code> object
* @deprecated use the method <code>arguments</code>
*/
@Deprecated
public void params(NVList params)
{
arguments(params);
}
/**
* Specifies method parameter types and retrieves "in" and "inout"
* argument values.
* Unless it calls the method <code>set_exception</code>,
* the DIR must call this method exactly once, even if the
* method signature contains no parameters. Once the method <code>
* arguments</code> or <code>set_exception</code>
* has been called, calling <code>arguments</code> on the same
* <code>ServerRequest</code> object
* will result in a <code>BAD_INV_ORDER</code> system exception.
* The DIR must pass in to the method <code>arguments</code>
* an NVList initialized with TypeCodes and Flags
* describing the parameter types for the operation, in the order in which
* they appear in the IDL specification (left to right). A
* potentially-different NVList will be returned from
* <code>arguments</code>, with the
* "in" and "inout" argument values supplied. If it does not call
* the method <code>set_exception</code>,
* the DIR must supply the returned NVList with return
* values for any "out" arguments before returning, and it may also change
* the return values for any "inout" arguments.
*
* @param args the arguments of the method, in the
* form of an NVList
* @see <a href="package-summary.html#unimpl"><code>CORBA</code>
* package comments for unimplemented features</a>
*/
public void arguments(org.omg.CORBA.NVList args) {
throw new org.omg.CORBA.NO_IMPLEMENT();
}
/**
* Specifies any return value for the call.
* <P>
* Note that this method is deprecated; use the method
* <code>set_result</code> in its place.
* <P>
* Unless the method
* <code>set_exception</code> is called, if the invoked method
* has a non-void result type, the method <code>set_result</code>
* must be called exactly once before the DIR returns.
* If the operation has a void result type, the method
* <code>set_result</code> may optionally be
* called once with an <code>Any</code> object whose type is
* <code>tk_void</code>. Calling the method <code>set_result</code> before
* the method <code>arguments</code> has been called or after
* the method <code>set_result</code> or <code>set_exception</code> has been
* called will result in a BAD_INV_ORDER exception. Calling the method
* <code>set_result</code> without having previously called
* the method <code>ctx</code> when the IDL operation contains a
* context expression, or when the NVList passed to arguments did not
* describe all parameters passed by the client, may result in a MARSHAL
* system exception.
*
* @param any an <code>Any</code> object containing the return value to be set
* @deprecated use the method <code>set_result</code>
*/
@Deprecated
public void result(Any any)
{
set_result(any);
}
/**
* Throws an <code>org.omg.CORBA.NO_IMPLEMENT</code> exception.
* <P>
* Specifies any return value for the call. Unless the method
* <code>set_exception</code> is called, if the invoked method
* has a non-void result type, the method <code>set_result</code>
* must be called exactly once before the DIR returns.
* If the operation has a void result type, the method
* <code>set_result</code> may optionally be
* called once with an <code>Any</code> object whose type is
* <code>tk_void</code>. Calling the method <code>set_result</code> before
* the method <code>arguments</code> has been called or after
* the method <code>set_result</code> or <code>set_exception</code> has been
* called will result in a BAD_INV_ORDER exception. Calling the method
* <code>set_result</code> without having previously called
* the method <code>ctx</code> when the IDL operation contains a
* context expression, or when the NVList passed to arguments did not
* describe all parameters passed by the client, may result in a MARSHAL
* system exception.
*
* @param any an <code>Any</code> object containing the return value to be set
* @see <a href="package-summary.html#unimpl"><code>CORBA</code>
* package comments for unimplemented features</a>
*/
public void set_result(org.omg.CORBA.Any any)
{
throw new org.omg.CORBA.NO_IMPLEMENT();
}
/**
* The DIR may call set_exception at any time to return an exception to the
* client. The Any passed to set_exception must contain either a system
* exception or a user exception specified in the raises expression
* of the invoked operation's IDL definition. Passing in an Any that does
* not
* contain an exception will result in a BAD_PARAM system exception. Passing
* in an unlisted user exception will result in either the DIR receiving a
* BAD_PARAM system exception or in the client receiving an
* UNKNOWN_EXCEPTION system exception.
*
* @param any the <code>Any</code> object containing the exception
* @deprecated use set_exception()
*/
@Deprecated
public void except(Any any)
{
set_exception(any);
}
/**
* Throws an <code>org.omg.CORBA.NO_IMPLEMENT</code> exception.
* <P>
* Returns the given exception to the client. This method
* is invoked by the DIR, which may call it at any time.
* The <code>Any</code> object passed to this method must
* contain either a system
* exception or one of the user exceptions specified in the
* invoked operation's IDL definition. Passing in an
* <code>Any</code> object that does not contain an exception
* will cause a BAD_PARAM system exception to be thrown. Passing
* in an unlisted user exception will result in either the DIR receiving a
* BAD_PARAM system exception or in the client receiving an
* UNKNOWN_EXCEPTION system exception.
*
* @param any the <code>Any</code> object containing the exception
* @exception BAD_PARAM if the given <code>Any</code> object does not
* contain an exception or the exception is an
* unlisted user exception
* @exception UNKNOWN_EXCEPTION if the given exception is an unlisted
* user exception and the DIR did not
* receive a BAD_PARAM exception
* @see <a href="package-summary.html#unimpl"><code>CORBA</code>
* package comments for unimplemented features</a>
*/
public void set_exception(Any any)
{
throw new org.omg.CORBA.NO_IMPLEMENT();
}
/**
* Returns the context information specified in IDL for the operation
* when the operation is not an attribute access and the operation's IDL
* definition contains a context expression; otherwise it returns
* a nil <code>Context</code> reference. Calling the method
* <code>ctx</code> before the method <code>arguments</code> has
* been called or after the method <code>ctx</code>,
* <code>set_result</code>, or <code>set_exception</code>
* has been called will result in a
* BAD_INV_ORDER system exception.
*
* @return the context object that is to be used
* to resolve any context strings whose
* values need to be sent with the invocation.
* @exception BAD_INV_ORDER if (1) the method <code>ctx</code> is called
* before the method <code>arguments</code> or
* (2) the method <code>ctx</code> is called
* after calling <code>set_result</code> or
* <code>set_exception</code>
*/
public abstract Context ctx();
}