/*
* @(#)ServiceContextData.java 1.16 05/11/17
*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package com.sun.corba.se.spi.servicecontext;
import org.omg.CORBA.BAD_PARAM ;
import org.omg.CORBA_2_3.portable.InputStream ;
import com.sun.corba.se.spi.servicecontext.ServiceContext ;
import java.lang.reflect.InvocationTargetException ;
import java.lang.reflect.Modifier ;
import java.lang.reflect.Field ;
import java.lang.reflect.Constructor ;
import com.sun.corba.se.spi.ior.iiop.GIOPVersion;
import com.sun.corba.se.spi.orb.ORB ;
import com.sun.corba.se.impl.orbutil.ORBUtility ;
/** Internal class used to hold data about a service context class.
*/
public class ServiceContextData {
private void dprint( String msg )
{
ORBUtility.dprint( this, msg ) ;
}
private void throwBadParam( String msg, Throwable exc )
{
BAD_PARAM error = new BAD_PARAM( msg ) ;
if (exc != null)
error.initCause( exc ) ;
throw error ;
}
public ServiceContextData( Class cls )
{
if (ORB.ORBInitDebug)
dprint( "ServiceContextData constructor called for class " + cls ) ;
scClass = cls ;
try {
if (ORB.ORBInitDebug)
dprint( "Finding constructor for " + cls ) ;
// Find the appropriate constructor in cls
Class[] args = new Class[2] ;
args[0] = InputStream.class ;
args[1] = GIOPVersion.class;
try {
scConstructor = cls.getConstructor( args ) ;
} catch (NoSuchMethodException nsme) {
throwBadParam( "Class does not have an InputStream constructor", nsme ) ;
}
if (ORB.ORBInitDebug)
dprint( "Finding SERVICE_CONTEXT_ID field in " + cls ) ;
// get the ID from the public static final int SERVICE_CONTEXT_ID
Field fld = null ;
try {
fld = cls.getField( "SERVICE_CONTEXT_ID" ) ;
} catch (NoSuchFieldException nsfe) {
throwBadParam( "Class does not have a SERVICE_CONTEXT_ID member", nsfe ) ;
} catch (SecurityException se) {
throwBadParam( "Could not access SERVICE_CONTEXT_ID member", se ) ;
}
if (ORB.ORBInitDebug)
dprint( "Checking modifiers of SERVICE_CONTEXT_ID field in " + cls ) ;
int mod = fld.getModifiers() ;
if (!Modifier.isPublic(mod) || !Modifier.isStatic(mod) ||
!Modifier.isFinal(mod) )
throwBadParam( "SERVICE_CONTEXT_ID field is not public static final", null ) ;
if (ORB.ORBInitDebug)
dprint( "Getting value of SERVICE_CONTEXT_ID in " + cls ) ;
try {
scId = fld.getInt( null ) ;
} catch (IllegalArgumentException iae) {
throwBadParam( "SERVICE_CONTEXT_ID not convertible to int", iae ) ;
} catch (IllegalAccessException iae2) {
throwBadParam( "Could not access value of SERVICE_CONTEXT_ID", iae2 ) ;
}
} catch (BAD_PARAM nssc) {
if (ORB.ORBInitDebug)
dprint( "Exception in ServiceContextData constructor: " + nssc ) ;
throw nssc ;
} catch (Throwable thr) {
if (ORB.ORBInitDebug)
dprint( "Unexpected Exception in ServiceContextData constructor: " +
thr ) ;
}
if (ORB.ORBInitDebug)
dprint( "ServiceContextData constructor completed" ) ;
}
/** Factory method used to create a ServiceContext object by
* unmarshalling it from the InputStream.
*/
public ServiceContext makeServiceContext(InputStream is, GIOPVersion gv)
{
Object[] args = new Object[2];
args[0] = is ;
args[1] = gv;
ServiceContext sc = null ;
try {
sc = (ServiceContext)(scConstructor.newInstance( args )) ;
} catch (IllegalArgumentException iae) {
throwBadParam( "InputStream constructor argument error", iae ) ;
} catch (IllegalAccessException iae2) {
throwBadParam( "InputStream constructor argument error", iae2 ) ;
} catch (InstantiationException ie) {
throwBadParam( "InputStream constructor called for abstract class", ie ) ;
} catch (InvocationTargetException ite) {
throwBadParam( "InputStream constructor threw exception " +
ite.getTargetException(), ite ) ;
}
return sc ;
}
int getId()
{
return scId ;
}
public String toString()
{
return "ServiceContextData[ scClass=" + scClass + " scConstructor=" +
scConstructor + " scId=" + scId + " ]" ;
}
private Class scClass ;
private Constructor scConstructor ;
private int scId ;
}