eu.etaxonomy.taxeditor.cdmlib/src/main/java/eu/etaxonomy/cdm/api/application/CdmDataChangeService.java

   1 // $Id$
   2 /**
   3  * Copyright (C) 2015 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.cdm.api.application;
  11
  12 import java.util.ArrayList;
  13 import java.util.HashSet;
  14 import java.util.List;
  15 import java.util.Set;
  16
  17 /**
  18  * @author cmathew
  19  * @date 18 Jun 2015
  20  *
  21  */
  22 public class CdmDataChangeService implements ICdmDataChangeService {
  23
  24     protected final Set<ICdmChangeListener> listeners;
  25
  26     private final List<CdmChangeEvent> currentEvents;
  27
  28     public CdmDataChangeService() {
  29         listeners = new HashSet<ICdmChangeListener>();
  30         currentEvents = new ArrayList<CdmChangeEvent>();
  31     }
  32
  33     /* (non-Javadoc)
  34      * @see eu.etaxonomy.taxeditor.store.ICdmDataChangeService#register(eu.etaxonomy.cdm.api.application.ICdmChangeListener)
  35      */
  36     @Override
  37     public void register(ICdmChangeListener listener) {
  38         listeners.add(listener);
  39     }
  40
  41     /* (non-Javadoc)
  42      * @see eu.etaxonomy.cdm.api.application.ICdmDataChangeService#unregister(eu.etaxonomy.cdm.api.application.ICdmChangeListener)
  43      */
  44     @Override
  45     public void unregister(ICdmChangeListener listener) {
  46         listeners.remove(listener);
  47     }
  48
  49     /* (non-Javadoc)
  50      * @see eu.etaxonomy.taxeditor.store.ICdmDataChangeService#addEvent(eu.etaxonomy.cdm.api.application.CdmChangeEvent)
  51      */
  52     @Override
  53     public void addEvent(CdmChangeEvent event) {
  54         currentEvents.add(event);
  55     }
  56
  57     /* (non-Javadoc)
  58      * @see eu.etaxonomy.taxeditor.store.ICdmDataChangeService#fireCurrentChangeEvents(boolean)
  59      */
  60     @Override
  61     public void fireCurrentChangeEvents(boolean async) {
  62         try {
  63             for(CdmChangeEvent event : currentEvents) {
  64                 fireChangeEvent(event,async);
  65             }
  66         } finally {
  67             currentEvents.clear();
  68         }
  69     }
  70
  71
  72
  73     /* (non-Javadoc)
  74      * @see eu.etaxonomy.taxeditor.store.ICdmDataChangeService#fireChangeEvent(eu.etaxonomy.cdm.api.application.CdmChangeEvent, boolean)
  75      */
  76     @Override
  77     public void fireChangeEvent(final CdmChangeEvent event, boolean async) {
  78
  79         for(final ICdmChangeListener listener : listeners) {
  80             listener.onChange(event);
  81         }
  82     }
  83
  84     /* (non-Javadoc)
  85      * @see eu.etaxonomy.taxeditor.store.ICdmDataChangeService#clear()
  86      */
  87     @Override
  88     public void clear() {
  89         listeners.clear();
  90         currentEvents.clear();
  91     }
  92
  93
  94 }