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

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