bundles/org.simantics.modeling/src/org/simantics/modeling/adapters/SCLCheckedStateRule.java

   1 /*******************************************************************************
   2  * Copyright (c) 2019 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  *     Semantum Oy - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.modeling.adapters;
  13
  14 import org.simantics.browsing.ui.CheckedState;
  15 import org.simantics.browsing.ui.model.check.CheckedStateRule;
  16 import org.simantics.db.ReadGraph;
  17 import org.simantics.db.Resource;
  18 import org.simantics.db.exception.DatabaseException;
  19 import org.simantics.db.layer0.variable.Variable;
  20 import org.simantics.db.layer0.variable.VariableOrResource;
  21 import org.simantics.db.layer0.variable.Variables;
  22 import org.simantics.modeling.ModelingResources;
  23 import org.simantics.scl.runtime.SCLContext;
  24 import org.simantics.scl.runtime.function.Function1;
  25 import org.slf4j.Logger;
  26 import org.slf4j.LoggerFactory;
  27
  28 public class SCLCheckedStateRule implements CheckedStateRule {
  29
  30     private static final Logger LOGGER = LoggerFactory.getLogger(SCLCheckedStateRule.class);
  31
  32     private Resource rule;
  33
  34     public SCLCheckedStateRule(ReadGraph graph, Resource rule) {
  35         this.rule = rule;
  36     }
  37
  38     @Override
  39     public boolean isCompatible(Class<?> contentType) {
  40         return contentType.equals(Resource.class) || contentType.equals(Variable.class);
  41     }
  42
  43     @Override
  44     public CheckedState getCheckedState(ReadGraph graph, Object content) throws DatabaseException {
  45
  46         ModelingResources MOD = ModelingResources.getInstance(graph);
  47
  48         Variable ruleVariable = Variables.getVariable(graph, rule);
  49
  50         Function1<Object,CheckedState> getLabels = ruleVariable.getPossiblePropertyValue(graph, MOD.SCLCheckedStateRule_getState);
  51         if(getLabels == null) {
  52             LOGGER.warn("Didn't find value for subject={}, predicate={}.", rule, ModelingResources.URIs.SCLCheckedStateRule_getState);
  53             return CheckedState.NOT_CHECKED;
  54         }
  55
  56         SCLContext sclContext = SCLContext.getCurrent();
  57         Object oldGraph = sclContext.get("graph");
  58         try {
  59             sclContext.put("graph", graph);
  60             return getLabels.apply(VariableOrResource.make(content));
  61         } catch (Throwable t) {
  62             LOGGER.error("Calculating checked state failed.", t);
  63             throw new DatabaseException(t);
  64         } finally {
  65             sclContext.put("graph", oldGraph);
  66         }
  67
  68     }
  69
  70 }