eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/view/CdmViewerUtil.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.taxeditor.view;
  10
  11 import java.util.HashMap;
  12 import java.util.Map;
  13
  14 import org.eclipse.core.commands.Command;
  15 import org.eclipse.core.runtime.IConfigurationElement;
  16 import org.eclipse.core.runtime.IExtensionRegistry;
  17 import org.eclipse.core.runtime.Platform;
  18 import org.eclipse.ui.PlatformUI;
  19 import org.eclipse.ui.commands.ICommandService;
  20
  21 import eu.etaxonomy.cdm.persistence.dto.UuidAndTitleCache;
  22 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  23 import eu.etaxonomy.taxeditor.store.CdmStore;
  24
  25 /**
  26  * Scans eu.etaxonomy.taxeditor.store.cdmViewer extension point.
  27  * @author pplitzner
  28  * @date Jul 7, 2015
  29  *
  30  */
  31 public class CdmViewerUtil {
  32
  33     /**
  34      * Returns a map of available commands to open the given input.
  35      * Keys are the command IDs and values are their string representations.
  36      *
  37      * @param input
  38      *            the object which should be handled by the available commands
  39      * @return a key-value map of available commands and their string
  40      *         representation
  41      */
  42     public static  Map<Command, String> getAvailableViewers(Object input){
  43         Map<Command, String> commandViewerNameMap = new HashMap<Command, String>();
  44
  45         if(input!=null){
  46             //for generic UuidAndTitleCache objects try to load the object
  47             if (input instanceof UuidAndTitleCache){
  48                 UuidAndTitleCache uuidAndTitleCache = (UuidAndTitleCache)input;
  49                 input = CdmStore.getCommonService().find(uuidAndTitleCache.getType(), uuidAndTitleCache.getUuid());
  50             }
  51
  52
  53             IExtensionRegistry reg = Platform.getExtensionRegistry();
  54             IConfigurationElement[] extensions = reg
  55                     .getConfigurationElementsFor("eu.etaxonomy.taxeditor.store.cdmViewer"); //$NON-NLS-1$
  56             for (IConfigurationElement configElement : extensions) {
  57                 if(configElement.getName().equals("viewCommandMapping")){ //$NON-NLS-1$
  58                     try {
  59                         String commandId = configElement.getAttribute("commandId"); //$NON-NLS-1$
  60                         String viewerName = configElement.getAttribute("viewerName"); //$NON-NLS-1$
  61                         Class<?> selectionClass = Class.forName(configElement.getAttribute("selection")); //$NON-NLS-1$
  62                         if(selectionClass.isAssignableFrom(input.getClass())){
  63                             ICommandService commandService = (ICommandService)PlatformUI.getWorkbench().getService(ICommandService.class);
  64                             Command command = commandService.getCommand(commandId);
  65                             if(command.isEnabled()){
  66                                 commandViewerNameMap.put(command, viewerName);
  67                             }
  68                         }
  69                     } catch (ClassNotFoundException e) {
  70                         MessagingUtils.error(CdmViewerChooser.class, "Could not initalize selection class element of cdmViewer extension", e); //$NON-NLS-1$
  71                     }
  72                 }
  73             }
  74         }
  75         return commandViewerNameMap;
  76     }
  77
  78 }