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1 /*
2 * Conditions Of Use
3 *
4 * This software was developed by employees of the National Institute of
5 * Standards and Technology (NIST), an agency of the Federal Government.
6 * Pursuant to title 15 Untied States Code Section 105, works of NIST
7 * employees are not subject to copyright protection in the United States
8 * and are considered to be in the public domain.  As a result, a formal
9 * license is not needed to use the software.
10 *
11 * This software is provided by NIST as a service and is expressly
12 * provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
13 * OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
14 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
15 * AND DATA ACCURACY.  NIST does not warrant or make any representations
16 * regarding the use of the software or the results thereof, including but
17 * not limited to the correctness, accuracy, reliability or usefulness of
18 * the software.
19 *
20 * Permission to use this software is contingent upon your acceptance
21 * of the terms of this agreement
22 *
23 * .
24 *
25 */
26 /*******************************************************************************
27  * Product of NIST/ITL Advanced Networking Technologies Division (ANTD)         *
28  *******************************************************************************/
29 package gov.nist.javax.sip.message;
30 
31 import gov.nist.javax.sip.header.*;
32 import gov.nist.javax.sip.header.ims.*;
33 import java.util.Hashtable;
34 
35 /**
36  * A map of which of the standard headers may appear as a list
37  *
38  * @version 1.2 $Revision: 1.14 $ $Date: 2009/07/17 18:57:53 $
39  * @since 1.1
40  */
41 class ListMap {
42     // A table that indicates whether a header has a list representation or
43     // not (to catch adding of the non-list form when a list exists.)
44     // Entries in this table allow you to look up the list form of a header
45     // (provided it has a list form). Note that under JAVA-5 we have
46     // typed collections which would render such a list obsolete. However,
47     // we are not using java 5.
48     private static Hashtable<Class<?>,Class<?>> headerListTable;
49 
50     private static boolean initialized;
51     static {
initializeListMap()52         initializeListMap();
53     }
54 
initializeListMap()55     static private void initializeListMap() {
56         /*
57          * Build a table mapping between objects that have a list form and the
58          * class of such objects.
59          */
60         headerListTable = new Hashtable<Class<?>, Class<?>>();
61         headerListTable.put(ExtensionHeaderImpl.class, ExtensionHeaderList.class);
62 
63         headerListTable.put(Contact.class, ContactList.class);
64 
65         headerListTable.put(ContentEncoding.class, ContentEncodingList.class);
66 
67         headerListTable.put(Via.class, ViaList.class);
68 
69         headerListTable.put(WWWAuthenticate.class, WWWAuthenticateList.class);
70 
71         headerListTable.put(Accept.class, AcceptList.class);
72 
73         headerListTable.put(AcceptEncoding.class, AcceptEncodingList.class);
74 
75         headerListTable.put(AcceptLanguage.class, AcceptLanguageList.class);
76 
77         headerListTable.put(ProxyRequire.class, ProxyRequireList.class);
78 
79         headerListTable.put(Route.class, RouteList.class);
80 
81         headerListTable.put(Require.class, RequireList.class);
82 
83         headerListTable.put(Warning.class, WarningList.class);
84 
85         headerListTable.put(Unsupported.class, UnsupportedList.class);
86 
87         headerListTable.put(AlertInfo.class, AlertInfoList.class);
88 
89         headerListTable.put(CallInfo.class, CallInfoList.class);
90 
91         headerListTable.put(ProxyAuthenticate.class,ProxyAuthenticateList.class);
92 
93         headerListTable.put(ProxyAuthorization.class, ProxyAuthorizationList.class);
94 
95         headerListTable.put(Authorization.class, AuthorizationList.class);
96 
97         headerListTable.put(Allow.class, AllowList.class);
98 
99         headerListTable.put(RecordRoute.class, RecordRouteList.class);
100 
101         headerListTable.put(ContentLanguage.class, ContentLanguageList.class);
102 
103         headerListTable.put(ErrorInfo.class, ErrorInfoList.class);
104 
105         headerListTable.put(Supported.class, SupportedList.class);
106 
107         headerListTable.put(InReplyTo.class,InReplyToList.class);
108 
109         // IMS headers.
110 
111         headerListTable.put(PAssociatedURI.class, PAssociatedURIList.class);
112 
113         headerListTable.put(PMediaAuthorization.class, PMediaAuthorizationList.class);
114 
115         headerListTable.put(Path.class, PathList.class);
116 
117         headerListTable.put(Privacy.class,PrivacyList.class);
118 
119         headerListTable.put(ServiceRoute.class, ServiceRouteList.class);
120 
121         headerListTable.put(PVisitedNetworkID.class, PVisitedNetworkIDList.class);
122 
123         headerListTable.put(SecurityClient.class, SecurityClientList.class);
124 
125         headerListTable.put(SecurityServer.class, SecurityServerList.class);
126 
127         headerListTable.put(SecurityVerify.class, SecurityVerifyList.class);
128 
129         headerListTable.put(PAssertedIdentity.class, PAssertedIdentityList.class);
130 
131         initialized = true;
132 
133     }
134 
135     /**
136      * return true if this has an associated list object.
137      */
hasList(SIPHeader sipHeader)138     static protected boolean hasList(SIPHeader sipHeader) {
139         if (sipHeader instanceof SIPHeaderList)
140             return false;
141         else {
142             Class<?> headerClass = sipHeader.getClass();
143             return headerListTable.get(headerClass) != null;
144         }
145     }
146 
147     /**
148      * Return true if this has an associated list object.
149      */
hasList(Class<?> sipHdrClass)150     static protected boolean hasList(Class<?> sipHdrClass) {
151         if (!initialized)
152             initializeListMap();
153         return headerListTable.get(sipHdrClass) != null;
154     }
155 
156     /**
157      * Get the associated list class.
158      */
getListClass(Class<?> sipHdrClass)159     static protected Class<?> getListClass(Class<?> sipHdrClass) {
160         if (!initialized)
161             initializeListMap();
162         return (Class<?>) headerListTable.get(sipHdrClass);
163     }
164 
165     /**
166      * Return a list object for this header if it has an associated list object.
167      */
168     @SuppressWarnings("unchecked")
getList(SIPHeader sipHeader)169     static protected SIPHeaderList<SIPHeader> getList(SIPHeader sipHeader) {
170         if (!initialized)
171             initializeListMap();
172         try {
173             Class<?> headerClass = sipHeader.getClass();
174             Class<?> listClass =  headerListTable.get(headerClass);
175             SIPHeaderList<SIPHeader> shl = (SIPHeaderList<SIPHeader>) listClass.newInstance();
176             shl.setHeaderName(sipHeader.getName());
177             return shl;
178         } catch (InstantiationException ex) {
179             ex.printStackTrace();
180         } catch (IllegalAccessException ex) {
181             ex.printStackTrace();
182         }
183         return null;
184     }
185 
186 }
187 
188