bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/property/RestoreDefaultValueHandler.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.modeling.ui.property;
  13
  14 import java.util.List;
  15
  16 import org.eclipse.core.commands.AbstractHandler;
  17 import org.eclipse.core.commands.ExecutionEvent;
  18 import org.eclipse.core.commands.ExecutionException;
  19 import org.eclipse.jface.viewers.ISelection;
  20 import org.eclipse.ui.IWorkbenchPart;
  21 import org.eclipse.ui.handlers.HandlerUtil;
  22 import org.eclipse.ui.part.IPage;
  23 import org.eclipse.ui.part.PageBookView;
  24 import org.simantics.browsing.ui.common.ErrorLogger;
  25 import org.simantics.browsing.ui.common.property.IProperty;
  26 import org.simantics.db.Resource;
  27 import org.simantics.db.WriteGraph;
  28 import org.simantics.db.common.CommentMetadata;
  29 import org.simantics.db.common.request.WriteRequest;
  30 import org.simantics.db.common.utils.NameUtils;
  31 import org.simantics.db.exception.DatabaseException;
  32 import org.simantics.db.layer0.variable.Variable;
  33 import org.simantics.db.management.ISessionContext;
  34 import org.simantics.ui.SimanticsUI;
  35 import org.simantics.ui.workbench.IPropertyPage;
  36 import org.simantics.utils.datastructures.Callback;
  37 import org.simantics.utils.ui.ISelectionUtils;
  38
  39
  40 /**
  41  * @author Tuukka Lehtonen
  42  */
  43 public class RestoreDefaultValueHandler extends AbstractHandler {
  44
  45     IPage getCurrentPage(IWorkbenchPart part) {
  46         if (part instanceof PageBookView)
  47             return ((PageBookView) part).getCurrentPage();
  48         if (part instanceof org.simantics.browsing.ui.platform.PageBookView)
  49             return ((org.simantics.browsing.ui.platform.PageBookView) part).getCurrentPage();
  50         return null;
  51     }
  52
  53     @Override
  54     public Object execute(ExecutionEvent event) throws ExecutionException {
  55         // Cannot use this, since the property view does not contribute a selection back to the workbench.
  56         //HandlerUtil.getCurrentSelection(event);
  57
  58         ISessionContext sc = SimanticsUI.getSessionContext();
  59         if (sc == null)
  60             return null;
  61
  62         IWorkbenchPart part = HandlerUtil.getActivePartChecked(event);
  63         IPage page = getCurrentPage(part);
  64         if (page == null || !(page instanceof IPropertyPage))
  65             return null;
  66         IPropertyPage propPage = (IPropertyPage) page;
  67         ISelection sel = propPage.getSelection();
  68         if (sel == null)
  69             return null;
  70
  71         final List<Variable> vars = ISelectionUtils.filterSelection(sel, Variable.class);
  72         if (!vars.isEmpty()) {
  73             resetVariableProperties(sc, vars);
  74         } else {
  75             final List<IProperty> props = ISelectionUtils.filterSelection(sel, IProperty.class);
  76             if (!props.isEmpty())
  77                 resetLegacyProperties(sc, props);
  78         }
  79
  80         return null;
  81     }
  82
  83
  84     private void resetVariableProperties(ISessionContext sc, final List<Variable> vars) {
  85         // TODO: how to do this generically using only variables? How to remove a property value to let it be asserted again?
  86         sc.getSession().asyncRequest(new WriteRequest() {
  87             @Override
  88             public void perform(WriteGraph graph) throws DatabaseException {
  89                 CommentMetadata cm = graph.getMetadata(CommentMetadata.class);
  90                 for (Variable v : vars) {
  91 //                    Variable predicate = v.getPossiblePropertyValue(graph, Variables.PREDICATE);
  92 //                    if (predicate == null)
  93 //                        continue;
  94 //                    Resource predicateResource = predicate.getPossiblePropertyValue(graph, Variables.REPRESENTS);
  95 //                    if (predicateResource == null)
  96 //                        continue;
  97                         Resource predicateResource = v.getPossiblePredicateResource(graph);
  98                         if (predicateResource == null)
  99                                 continue;
 100                     Variable parent = v.getParent(graph);
 101                     if (parent == null)
 102                         continue;
 103                     Resource parentResource = parent.getPossibleRepresents(graph);
 104                     if (parentResource == null)
 105                         continue;
 106
 107 //                    System.out.println(parent.getURI(graph));
 108 //                    System.out.println(predicate.getURI(graph));
 109 //                    System.out.println(v.getURI(graph));
 110
 111                     graph.denyValue(parentResource, predicateResource);
 112                     cm.add("Restored default value for property " + NameUtils.getSafeName(graph, predicateResource));
 113                 }
 114                 graph.addMetadata(cm);
 115             }
 116         }, new Callback<DatabaseException>() {
 117             @Override
 118             public void run(DatabaseException parameter) {
 119                 if (parameter != null)
 120                     ErrorLogger.defaultLogError("Failed to restore default property values, see exception for details.", parameter);
 121             }
 122         });
 123     }
 124
 125     private boolean resetLegacyProperties(ISessionContext sc, final List<IProperty> props) {
 126         // Dry run to see if there's anything to remove before writing.
 127         boolean changes = false;
 128         for (IProperty cp : props) {
 129             if (IProperty.DIRECT.contains(cp.getType())) {
 130                 changes = true;
 131                 break;
 132             }
 133         }
 134         if (changes) {
 135             sc.getSession().asyncRequest(new WriteRequest() {
 136                 @Override
 137                 public void perform(WriteGraph graph) throws DatabaseException {
 138                     for (IProperty cp : props) {
 139                         if (IProperty.DIRECT.contains(cp.getType())) {
 140                             Resource[] data = cp.getData(Resource[].class);
 141                             graph.denyStatement(data[0], data[1], data[2]);
 142                         }
 143                     }
 144                 }
 145             }, new Callback<DatabaseException>() {
 146                 @Override
 147                 public void run(DatabaseException parameter) {
 148                     if (parameter != null)
 149                         ErrorLogger.defaultLogError("Failed to restore default property values, see exception for details.", parameter);
 150                 }
 151             });
 152         }
 153         return changes;
 154     }
 155
 156 }