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