1 /*
2 * Copyright (c) 1999, 2003, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.corba.se.spi.servicecontext;
27
28 import org.omg.CORBA.BAD_PARAM ;
29 import org.omg.CORBA_2_3.portable.InputStream ;
30 import com.sun.corba.se.spi.servicecontext.ServiceContext ;
31 import java.lang.reflect.InvocationTargetException ;
32 import java.lang.reflect.Modifier ;
33 import java.lang.reflect.Field ;
34 import java.lang.reflect.Constructor ;
35 import com.sun.corba.se.spi.ior.iiop.GIOPVersion;
36 import com.sun.corba.se.spi.orb.ORB ;
37 import com.sun.corba.se.impl.orbutil.ORBUtility ;
38
39 /** Internal class used to hold data about a service context class.
40 */
41 public class ServiceContextData {
42 private void dprint( String msg )
43 {
44 ORBUtility.dprint( this, msg ) ;
45 }
46
47 private void throwBadParam( String msg, Throwable exc )
48 {
49 BAD_PARAM error = new BAD_PARAM( msg ) ;
50 if (exc != null)
51 error.initCause( exc ) ;
52 throw error ;
53 }
54
55 public ServiceContextData( Class cls )
56 {
57 if (ORB.ORBInitDebug)
58 dprint( "ServiceContextData constructor called for class " + cls ) ;
59
60 scClass = cls ;
61
62 try {
63 if (ORB.ORBInitDebug)
64 dprint( "Finding constructor for " + cls ) ;
65
66 // Find the appropriate constructor in cls
67 Class[] args = new Class[2] ;
68 args[0] = InputStream.class ;
69 args[1] = GIOPVersion.class;
70 try {
71 scConstructor = cls.getConstructor( args ) ;
72 } catch (NoSuchMethodException nsme) {
73 throwBadParam( "Class does not have an InputStream constructor", nsme ) ;
74 }
75
76 if (ORB.ORBInitDebug)
77 dprint( "Finding SERVICE_CONTEXT_ID field in " + cls ) ;
78
79 // get the ID from the public static final int SERVICE_CONTEXT_ID
80 Field fld = null ;
81 try {
82 fld = cls.getField( "SERVICE_CONTEXT_ID" ) ;
83 } catch (NoSuchFieldException nsfe) {
84 throwBadParam( "Class does not have a SERVICE_CONTEXT_ID member", nsfe ) ;
85 } catch (SecurityException se) {
86 throwBadParam( "Could not access SERVICE_CONTEXT_ID member", se ) ;
87 }
88
89 if (ORB.ORBInitDebug)
90 dprint( "Checking modifiers of SERVICE_CONTEXT_ID field in " + cls ) ;
91
92 int mod = fld.getModifiers() ;
93 if (!Modifier.isPublic(mod) || !Modifier.isStatic(mod) ||
94 !Modifier.isFinal(mod) )
95 throwBadParam( "SERVICE_CONTEXT_ID field is not public static final", null ) ;
96
97 if (ORB.ORBInitDebug)
98 dprint( "Getting value of SERVICE_CONTEXT_ID in " + cls ) ;
99
100 try {
101 scId = fld.getInt( null ) ;
102 } catch (IllegalArgumentException iae) {
103 throwBadParam( "SERVICE_CONTEXT_ID not convertible to int", iae ) ;
104 } catch (IllegalAccessException iae2) {
105 throwBadParam( "Could not access value of SERVICE_CONTEXT_ID", iae2 ) ;
106 }
107 } catch (BAD_PARAM nssc) {
108 if (ORB.ORBInitDebug)
109 dprint( "Exception in ServiceContextData constructor: " + nssc ) ;
110 throw nssc ;
111 } catch (Throwable thr) {
112 if (ORB.ORBInitDebug)
113 dprint( "Unexpected Exception in ServiceContextData constructor: " +
114 thr ) ;
115 }
116
117 if (ORB.ORBInitDebug)
118 dprint( "ServiceContextData constructor completed" ) ;
119 }
120
121 /** Factory method used to create a ServiceContext object by
122 * unmarshalling it from the InputStream.
123 */
124 public ServiceContext makeServiceContext(InputStream is, GIOPVersion gv)
125 {
126 Object[] args = new Object[2];
127 args[0] = is ;
128 args[1] = gv;
129 ServiceContext sc = null ;
130
131 try {
132 sc = (ServiceContext)(scConstructor.newInstance( args )) ;
133 } catch (IllegalArgumentException iae) {
134 throwBadParam( "InputStream constructor argument error", iae ) ;
135 } catch (IllegalAccessException iae2) {
136 throwBadParam( "InputStream constructor argument error", iae2 ) ;
137 } catch (InstantiationException ie) {
138 throwBadParam( "InputStream constructor called for abstract class", ie ) ;
139 } catch (InvocationTargetException ite) {
140 throwBadParam( "InputStream constructor threw exception " +
141 ite.getTargetException(), ite ) ;
142 }
143
144 return sc ;
145 }
146
147 int getId()
148 {
149 return scId ;
150 }
151
152 public String toString()
153 {
154 return "ServiceContextData[ scClass=" + scClass + " scConstructor=" +
155 scConstructor + " scId=" + scId + " ]" ;
156 }
157
158 private Class scClass ;
159 private Constructor scConstructor ;
160 private int scId ;
161 }