bundles/org.simantics.ui/src/org/simantics/ui/contribution/OperationsMenuContribution.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.ui.contribution;\r
  13 \r
  14 import java.lang.ref.WeakReference;\r
  15 import java.util.ArrayList;\r
  16 import java.util.Collection;\r
  17 \r
  18 import org.eclipse.jface.action.Action;\r
  19 import org.eclipse.jface.action.IAction;\r
  20 import org.eclipse.jface.resource.ImageDescriptor;\r
  21 import org.simantics.db.ReadGraph;\r
  22 import org.simantics.db.Resource;\r
  23 import org.simantics.db.Session;\r
  24 import org.simantics.db.exception.DatabaseException;\r
  25 import org.simantics.db.request.Read;\r
  26 import org.simantics.layer0.utils.collections.IContextualList;\r
  27 import org.simantics.layer0.utils.operations.IOperation;\r
  28 import org.simantics.project.IProject;\r
  29 import org.simantics.ui.SimanticsUI;\r
  30 import org.simantics.ui.icons.ImageUtil;\r
  31 import org.simantics.ui.utils.ResourceAdaptionUtils;\r
  32 import org.simantics.utils.datastructures.persistent.ContextMap;\r
  33 \r
  34 \r
  35 public abstract class OperationsMenuContribution extends DynamicMenuContribution {\r
  36 \r
  37     protected abstract Resource getListResource(ReadGraph g) throws Exception;\r
  38 \r
  39     protected void assignParameters(ContextMap parameters) {\r
  40     }\r
  41 \r
  42     @Override\r
  43     protected boolean preAcceptSelection(Object[] selection) {\r
  44         if(selection == null || selection.length != 1)\r
  45             return false;\r
  46         Resource r = ResourceAdaptionUtils.adaptToResource(selection[0]);\r
  47         return r != null;\r
  48     }\r
  49 \r
  50     @Override\r
  51     protected IAction[] getActions(ReadGraph g, Object[] selection) {\r
  52         if(selection.length == 1) {\r
  53             final Resource r = ResourceAdaptionUtils.adaptToResource(selection[0]);\r
  54             if(r == null)\r
  55                 return NO_ACTIONS;\r
  56             try {\r
  57                 return g.syncRequest(new Read<IAction[]>() {\r
  58 \r
  59                     @Override\r
  60                     public IAction[] perform(ReadGraph g) throws DatabaseException {\r
  61                         IContextualList list;\r
  62                         try {\r
  63                             list = g.adapt(getListResource(g), IContextualList.class);\r
  64                         } catch (Exception e) {\r
  65                             e.printStackTrace();\r
  66                             return null;\r
  67                         }\r
  68                         final ContextMap parameters = new ContextMap();\r
  69                         parameters.put(IOperation.SUBJECT, r);\r
  70                         IProject project = SimanticsUI.peekProject();\r
  71                         if (project != null)\r
  72                             parameters.put(IOperation.PROJECT, project.get());\r
  73                         assignParameters(parameters);\r
  74                         Collection<Resource> operations = new ArrayList<Resource>();\r
  75                         list.fill(g, parameters, operations);\r
  76 \r
  77                         if(!operations.isEmpty()) {\r
  78                             IAction[] actions = new IAction[operations.size()];\r
  79                             int i=0;\r
  80                             for(Resource opRes : operations) {\r
  81                                 final IOperation op = g.adapt(opRes, IOperation.class);\r
  82                                 final ImageDescriptor imgDesc = ImageUtil.adaptImageDescriptor(g, opRes);\r
  83                                 final WeakReference<Session> sessionRef = new WeakReference<Session>(g.getSession());\r
  84                                 actions[i++] = new Action(op.getName(), imgDesc) {\r
  85 \r
  86                                     @Override\r
  87                                     public void run() {\r
  88                                         Session session = sessionRef.get();\r
  89                                         if (session != null)\r
  90                                             op.exec(session, parameters);\r
  91                                     }\r
  92 \r
  93                                 };\r
  94                             }\r
  95                             return actions;\r
  96                         } else {\r
  97                             return null;\r
  98                         }\r
  99                     }\r
 100 \r
 101                 });\r
 102             } catch (DatabaseException e) {\r
 103                 e.printStackTrace();\r
 104             }\r
 105 \r
 106         }\r
 107         return NO_ACTIONS;\r
 108     }\r
 109 \r
 110 }\r