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

   1 /**
   2  * Copyright (C) 2015 EDIT
   3  * European Distributed Institute of Taxonomy
   4  * http://www.e-taxonomy.eu
   5  *
   6  * The contents of this file are subject to the Mozilla Public License Version 1.1
   7  * See LICENSE.TXT at the top of this package for the full license terms.
   8  */
   9 package eu.etaxonomy.cdm.api.application;
  10
  11 import java.util.ArrayList;
  12 import java.util.HashSet;
  13 import java.util.List;
  14 import java.util.Set;
  15
  16 /**
  17  * @author cmathew
  18  * @date 18 Jun 2015
  19  */
  20 public class CdmDataChangeService implements ICdmDataChangeService {
  21
  22     protected final Set<ICdmChangeListener> listeners;
  23
  24     private final List<CdmChangeEvent> currentEvents;
  25
  26     public CdmDataChangeService() {
  27         listeners = new HashSet<ICdmChangeListener>();
  28         currentEvents = new ArrayList<CdmChangeEvent>();
  29     }
  30
  31     @Override
  32     public void register(ICdmChangeListener listener) {
  33         listeners.add(listener);
  34     }
  35
  36     @Override
  37     public void unregister(ICdmChangeListener listener) {
  38         listeners.remove(listener);
  39     }
  40
  41     @Override
  42     public void addEvent(CdmChangeEvent event) {
  43         currentEvents.add(event);
  44     }
  45
  46     @Override
  47     public void fireCurrentChangeEvents(boolean async) {
  48         try {
  49             for(CdmChangeEvent event : currentEvents) {
  50                 fireChangeEvent(event,async);
  51             }
  52         } finally {
  53             currentEvents.clear();
  54         }
  55     }
  56
  57     @Override
  58     public void fireChangeEvent(final CdmChangeEvent event, boolean async) {
  59
  60         for(final ICdmChangeListener listener : listeners) {
  61             listener.onChange(event);
  62         }
  63     }
  64
  65     @Override
  66     public void clear() {
  67         listeners.clear();
  68         currentEvents.clear();
  69     }
  70 }