4 package org.vamsas.client.simpleclient;
6 import org.apache.commons.logging.Log;
7 import org.apache.commons.logging.LogFactory;
8 import org.vamsas.client.ClientHandle;
9 import org.vamsas.client.SessionHandle;
10 import org.vamsas.client.UserHandle;
11 import org.vamsas.client.VorbaId;
12 import org.vamsas.client.VorbaIdFactory;
13 import org.vamsas.client.Vobject;
14 import org.vamsas.objects.utils.document.VersionEntries;
16 import java.util.Hashtable;
17 import java.util.zip.CRC32;
19 * Simplest VorbaId constructor
23 public class IdFactory extends VorbaIdFactory {
24 static Log log = LogFactory.getLog(IdFactory.class);
25 private SessionHandle session=null;
26 private ClientHandle client;
27 private UserHandle user;
28 private CRC32 unique=new CRC32(); // used to attempt a unique but predictable stream for IDs
29 private String idstring;
30 int sequence=1; // incrementing value for next new ID
36 // TODO Auto-generated constructor stub
44 protected IdFactory(SessionHandle session, ClientHandle client, UserHandle user) {
46 this.session = session;
50 unique.update(new Object[] { session, client, user}.toString().getBytes());
51 // TODO: Ensure format of URNs and use standard composition methods.
52 idstring = client.getClientName()+":"+unique.getValue()+".";
53 extantids=new Hashtable();
56 * values for keys in this hash can be used to reference the org.vamsas.client.Vobject instance for the VorbaId string.
57 * @return the hash of all VorbaIds
59 protected Hashtable getVorbaIdHash() {
64 * @see org.vamsas.client.VorbaIdFactory#makeVorbaId()
66 public VorbaId makeVorbaId(Vobject vobject) {
68 throw new Error("makeVorbaId called on improperly initialised IdFactory Vobject!");
69 if (!vobject.isRegisterable())
70 throw new Error("makeVorbaId called on unregisterable object.");
71 if (vobject.isRegistered())
72 throw new Error("makeVorbaId called on already registered object.");
81 newidstring=idstring+Integer.toString(sequence);
82 } while (extantids.containsKey(newidstring));
83 extantids.put(newidstring, vobject); // hash the Vobject by its new Id
84 VorbaId id = newId(newidstring); // VorbaId.hash()==newidstring.hash() so we can still recover vobject
89 * @see org.vamsas.client.VorbaIdFactory#setSession(org.vamsas.client.SessionHandle)
91 protected void setSession(SessionHandle sessionhandle) {
92 if (sessionhandle!=null)
93 session=sessionhandle;
95 log.warn("setSession(null) called.");
99 * @see org.vamsas.client.VorbaIdFactory#getSessionHandle()
101 public SessionHandle getSessionHandle() {
106 * @see org.vamsas.client.VorbaIdFactory#setClient(org.vamsas.client.ClientHandle)
108 protected void setClient(ClientHandle appHandle) {
112 log.warn("setClient(null) called.");
116 * @see org.vamsas.client.VorbaIdFactory#getClientHandle()
118 public ClientHandle getClientHandle() {
123 * @see org.vamsas.client.VorbaIdFactory#setUser(org.vamsas.client.UserHandle)
125 protected void setUser(UserHandle userHandle) {
126 if (userHandle!=null)
129 log.warn("setUser(null) called.");
133 * @see org.vamsas.client.VorbaIdFactory#getUserHandle()
135 public UserHandle getUserHandle() {
139 * Convenience method used for default behaviour in testing
140 * and any anonymous internal vamsasDocument unmarshalling
144 protected static IdFactory getDummyFactory(String clientname) {
145 if (clientname==null)
146 clientname="org.vamsas.client.simpleclient.IdFactory";
147 return new IdFactory(new SessionHandle("dummy.session"),
148 new ClientHandle(clientname,VersionEntries.latestVersion()),
149 new UserHandle(clientname, "Arnold User's Inc."));