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.cdm.api.service.IOccurrenceService;
  23 import eu.etaxonomy.cdm.api.service.ITaxonService;
  24 import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationBase;
  25 import eu.etaxonomy.cdm.model.taxon.Synonym;
  26 import eu.etaxonomy.cdm.model.taxon.Taxon;
  27 import eu.etaxonomy.cdm.persistence.dto.UuidAndTitleCache;
  28 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  29 import eu.etaxonomy.taxeditor.store.CdmStore;
  30
  31 /**
  32  * Scans eu.etaxonomy.taxeditor.store.cdmViewer extension point.
  33  * @author pplitzner
  34  * @date Jul 7, 2015
  35  *
  36  */
  37 public class CdmViewerUtil {
  38
  39     /**
  40      * Returns a map of available commands to open the given input.
  41      * Keys are the command IDs and values are their string representations.
  42      *
  43      * @param input
  44      *            the object which should be handled by the available commands
  45      * @return a key-value map of available commands and their string
  46      *         representation
  47      */
  48     public static  Map<Command, String> getAvailableViewers(Object input){
  49         Map<Command, String> commandViewerNameMap = new HashMap<Command, String>();
  50
  51         if(input!=null){
  52             //for generic UuidAndTitleCache objects try to load the object
  53             if (input instanceof UuidAndTitleCache){
  54                 UuidAndTitleCache uuidAndTitleCache = (UuidAndTitleCache)input;
  55                 Class type = uuidAndTitleCache.getType();
  56                 if(type == Taxon.class || type == Synonym.class){
  57                     input = CdmStore.getService(ITaxonService.class).load(uuidAndTitleCache.getUuid());
  58                 }
  59                 else if(SpecimenOrObservationBase.class.isAssignableFrom(type)){
  60                     input = CdmStore.getService(IOccurrenceService.class).load(uuidAndTitleCache.getUuid());
  61                 }
  62             }
  63
  64
  65             IExtensionRegistry reg = Platform.getExtensionRegistry();
  66             IConfigurationElement[] extensions = reg
  67                     .getConfigurationElementsFor("eu.etaxonomy.taxeditor.store.cdmViewer"); //$NON-NLS-1$
  68             for (IConfigurationElement configElement : extensions) {
  69                 if(configElement.getName().equals("viewCommandMapping")){ //$NON-NLS-1$
  70                     try {
  71                         String commandId = configElement.getAttribute("commandId"); //$NON-NLS-1$
  72                         String viewerName = configElement.getAttribute("viewerName"); //$NON-NLS-1$
  73                         Class<?> selectionClass = Class.forName(configElement.getAttribute("selection")); //$NON-NLS-1$
  74                         if(selectionClass.isAssignableFrom(input.getClass())){
  75                             ICommandService commandService = (ICommandService)PlatformUI.getWorkbench().getService(ICommandService.class);
  76                             Command command = commandService.getCommand(commandId);
  77                             //TODO: maybe pass the command directly instead of just the command id
  78                             if(command.isEnabled()){
  79                                 commandViewerNameMap.put(command, viewerName);
  80                             }
  81                         }
  82                     } catch (ClassNotFoundException e) {
  83                         MessagingUtils.error(CdmViewerChooser.class, "Could not initalize selection class element of cdmViewer extension", e); //$NON-NLS-1$
  84                     }
  85                 }
  86             }
  87         }
  88         return commandViewerNameMap;
  89     }
  90
  91 }