eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/view/CdmViewerUtil.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.taxeditor.view;
  11
  12 import java.util.HashMap;
  13 import java.util.Map;
  14
  15 import org.eclipse.core.runtime.IConfigurationElement;
  16 import org.eclipse.core.runtime.IExtensionRegistry;
  17 import org.eclipse.core.runtime.Platform;
  18
  19 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  20
  21 /**
  22  * Scans eu.etaxonomy.taxeditor.store.cdmViewer extension point.
  23  * @author pplitzner
  24  * @date Jul 7, 2015
  25  *
  26  */
  27 public class CdmViewerUtil {
  28
  29     /**
  30      * Returns a map of available commands to open the given input.
  31      * Keys are the command IDs and values are their string representations.
  32      *
  33      * @param input
  34      *            the object which should be handled by the available commands
  35      * @return a key-value map of available commands and their string
  36      *         representation
  37      */
  38     public static  Map<String, String> getAvailableViewers(Object input){
  39         Map<String, String> commandViewerNameMap = new HashMap<String, String>();
  40
  41         if(input!=null){
  42             IExtensionRegistry reg = Platform.getExtensionRegistry();
  43             IConfigurationElement[] extensions = reg
  44                     .getConfigurationElementsFor("eu.etaxonomy.taxeditor.store.cdmViewer");
  45             for (IConfigurationElement configElement : extensions) {
  46                 if(configElement.getName().equals("viewCommandMapping")){
  47                     try {
  48                         String commandId = configElement.getAttribute("commandId");
  49                         String viewerName = configElement.getAttribute("viewerName");
  50                         Class<?> selectionClass = Class.forName(configElement.getAttribute("selection"));
  51                         if(selectionClass.isAssignableFrom(input.getClass())){
  52                             commandViewerNameMap.put(commandId, viewerName);
  53                         }
  54                     } catch (ClassNotFoundException e) {
  55                         MessagingUtils.error(CdmViewerChooser.class, "Could not initalize selection class element of cdmViewer extension", e);
  56                     }
  57                 }
  58             }
  59         }
  60         return commandViewerNameMap;
  61     }
  62
  63 }