eu.etaxonomy.taxeditor.cdmlib/src/main/java/eu/etaxonomy/taxeditor/session/CdmEntitySessionManager.java

   1 // $Id$
   2 /**
   3 * Copyright (C) 2014 EDIT
   4 * European Distributed Institute of Taxonomy
   5 * http://www.e-taxonomy.eu
   6 *
   7 * The contents of this file are subject to the Mozilla Public License Version 1.1
   8 * See LICENSE.TXT at the top of this package for the full license terms.
   9 */
  10 package eu.etaxonomy.taxeditor.session;
  11
  12 import java.util.ArrayList;
  13 import java.util.Collection;
  14 import java.util.HashMap;
  15 import java.util.List;
  16 import java.util.Map;
  17
  18 import org.apache.log4j.Logger;
  19 import org.springframework.stereotype.Component;
  20
  21 import eu.etaxonomy.cdm.model.common.CdmBase;
  22
  23 /**
  24  * @author cmathew
  25  * @date 16 Oct 2014
  26  *
  27  */
  28 @Component
  29 public class CdmEntitySessionManager implements ICdmEntitySessionManager {
  30         private static final Logger logger = Logger.getLogger(CdmEntitySessionManager.class);
  31
  32     private final Map<ICdmEntitySessionEnabled, ICdmEntitySession> ownerSessionMap =
  33                 new HashMap<ICdmEntitySessionEnabled, ICdmEntitySession>();
  34
  35     private final List<ICdmEntitySessionManagerObserver> sessionObservers = new ArrayList<ICdmEntitySessionManagerObserver>();
  36
  37     private ICdmEntitySession activeSession;
  38
  39     @Override
  40         public ICdmEntitySession newSession(ICdmEntitySessionEnabled sessionOwner, boolean setAsActive) {
  41                 ICdmEntitySession session = ownerSessionMap.get(sessionOwner);
  42                 if(session == null) {
  43                         session = new CdmEntitySession(sessionOwner, this);
  44                         addToOwnerSessionMap(sessionOwner, session);
  45
  46                 }
  47
  48                 if(setAsActive) {
  49                         activeSession = session;
  50
  51                 }
  52
  53                 return session;
  54         }
  55
  56     @Override
  57     public ICdmEntitySession getActiveSession() {
  58         return activeSession;
  59     }
  60
  61
  62     /* (non-Javadoc)
  63      * @see eu.etaxonomy.taxeditor.session.ICdmEntitySessionManager#getSessions()
  64      */
  65     @Override
  66     public Collection<ICdmEntitySession> getSessions() {
  67         return ownerSessionMap.values();
  68     }
  69
  70
  71         /* (non-Javadoc)
  72          * @see eu.etaxonomy.taxeditor.session.ICdmEntitySessionManager#bind(eu.etaxonomy.taxeditor.session.ISessionEventListener)
  73          */
  74         @Override
  75         public void bind(ICdmEntitySessionEnabled sessionOwner) {
  76                 if(sessionOwner == null) {
  77                         activeSession = null;
  78                         return;
  79                 }
  80                 ICdmEntitySession session  = ownerSessionMap.get(sessionOwner);
  81                 if(session == null) {
  82                         session = newSession(sessionOwner,true);
  83                 }
  84
  85                 activeSession = session;
  86
  87         }
  88
  89
  90         /* (non-Javadoc)
  91          * @see eu.etaxonomy.taxeditor.session.ICdmEntitySessionManager#load(T)
  92          */
  93         @Override
  94         public <T extends Object> T load(T obj) {
  95                 if(activeSession == null) {
  96                         return obj;
  97                 } else {
  98                         return activeSession.load(obj);
  99                 }
 100         }
 101
 102
 103         /* (non-Javadoc)
 104          * @see eu.etaxonomy.taxeditor.session.ICdmEntitySessionManager#load(T)
 105          */
 106         @Override
 107         public <T extends CdmBase> T load(T cdmBase) {
 108                 if(activeSession == null) {
 109                         return cdmBase;
 110                 }
 111                 return activeSession.load(cdmBase);
 112         }
 113
 114
 115         /* (non-Javadoc)
 116          * @see eu.etaxonomy.taxeditor.session.ICdmEntitySessionManager#load(java.util.Collection)
 117          */
 118         @Override
 119         public <T extends CdmBase> Collection<T> load(Collection<T> cdmBaseList) {
 120                 if(activeSession == null) {
 121                         return cdmBaseList;
 122                 }
 123                 return activeSession.load(cdmBaseList);
 124         }
 125
 126
 127         /* (non-Javadoc)
 128          * @see eu.etaxonomy.taxeditor.session.ICdmEntitySessionManager#dispose(eu.etaxonomy.taxeditor.session.ISessionEventListener)
 129          */
 130         void dispose(ICdmEntitySessionEnabled owner) {
 131                 ICdmEntitySession session = ownerSessionMap.get(owner);
 132                 if(session == null) {
 133                         logger.info("No Session connected to owner, nothing to dispose");
 134                         return;
 135                 }
 136                 ownerSessionMap.remove(owner);
 137                 notifyObservers();
 138         }
 139
 140          void addToOwnerSessionMap(ICdmEntitySessionEnabled owner, ICdmEntitySession session) {
 141                 ownerSessionMap.put(owner, session);
 142         }
 143
 144     /* (non-Javadoc)
 145      * @see eu.etaxonomy.taxeditor.session.ICdmEntitySessionManager#addSessionListener()
 146      */
 147     @Override
 148     public void addSessionObserver(ICdmEntitySessionManagerObserver sessionObserver) {
 149         sessionObservers.add(sessionObserver);
 150     }
 151
 152     public void notifyObservers() {
 153         for(ICdmEntitySessionManagerObserver sessionObserver : sessionObservers) {
 154             sessionObserver.changed();
 155         }
 156     }
 157
 158     /* (non-Javadoc)
 159      * @see eu.etaxonomy.taxeditor.session.ICdmEntitySessionManager#isRemoting()
 160      */
 161     @Override
 162     public boolean isRemoting() {
 163         // FIXME:Remoting stupid method to check whether we are in remoting
 164         return true;
 165     }
 166
 167
 168
 169
 170
 171 }