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.commands.Command;
  16 import org.eclipse.core.runtime.IConfigurationElement;
  17 import org.eclipse.core.runtime.IExtensionRegistry;
  18 import org.eclipse.core.runtime.Platform;
  19 import org.eclipse.ui.PlatformUI;
  20 import org.eclipse.ui.commands.ICommandService;
  21
  22 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  23
  24 /**
  25  * Scans eu.etaxonomy.taxeditor.store.cdmViewer extension point.
  26  * @author pplitzner
  27  * @date Jul 7, 2015
  28  *
  29  */
  30 public class CdmViewerUtil {
  31
  32     /**
  33      * Returns a map of available commands to open the given input.
  34      * Keys are the command IDs and values are their string representations.
  35      *
  36      * @param input
  37      *            the object which should be handled by the available commands
  38      * @return a key-value map of available commands and their string
  39      *         representation
  40      */
  41     public static  Map<Command, String> getAvailableViewers(Object input){
  42         Map<Command, String> commandViewerNameMap = new HashMap<Command, String>();
  43
  44         if(input!=null){
  45             IExtensionRegistry reg = Platform.getExtensionRegistry();
  46             IConfigurationElement[] extensions = reg
  47                     .getConfigurationElementsFor("eu.etaxonomy.taxeditor.store.cdmViewer"); //$NON-NLS-1$
  48             for (IConfigurationElement configElement : extensions) {
  49                 if(configElement.getName().equals("viewCommandMapping")){ //$NON-NLS-1$
  50                     try {
  51                         String commandId = configElement.getAttribute("commandId"); //$NON-NLS-1$
  52                         String viewerName = configElement.getAttribute("viewerName"); //$NON-NLS-1$
  53                         Class<?> selectionClass = Class.forName(configElement.getAttribute("selection")); //$NON-NLS-1$
  54                         if(selectionClass.isAssignableFrom(input.getClass())){
  55                             ICommandService commandService = (ICommandService)PlatformUI.getWorkbench().getService(ICommandService.class);
  56                             Command command = commandService.getCommand(commandId);
  57                             //TODO: maybe pass the command directly instead of just the command id
  58                             if(command.isEnabled()){
  59                                 commandViewerNameMap.put(command, viewerName);
  60                             }
  61                         }
  62                     } catch (ClassNotFoundException e) {
  63                         MessagingUtils.error(CdmViewerChooser.class, "Could not initalize selection class element of cdmViewer extension", e); //$NON-NLS-1$
  64                     }
  65                 }
  66             }
  67         }
  68         return commandViewerNameMap;
  69     }
  70
  71 }