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