/*******************************************************************************
* Copyright (c) 2007, 2012 Association for Decentralized Information Management
* in Industry THTH ry.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* VTT Technical Research Centre of Finland - initial API and implementation
*******************************************************************************/
package org.simantics.modeling.ui.property;
import org.eclipse.core.expressions.PropertyTester;
import org.simantics.DatabaseJob;
import org.simantics.Simantics;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.Session;
import org.simantics.db.common.request.UniqueRead;
import org.simantics.db.common.utils.RequestUtil;
import org.simantics.db.exception.DatabaseException;
import org.simantics.layer0.Layer0;
import org.simantics.structural.stubs.StructuralResource2;
import org.simantics.ui.SimanticsUI;
import org.simantics.ui.utils.ResourceAdaptionUtils;
/**
* A JFace property tester extension for the Eclipse command framework that is
* meant for working with Simantics database {@link Resource} instances.
*
*
* This tester expects to receive IStructuredSelections that contain Resource
* instances.
*
*
* It supports testing of the following properties:
*
*
* @author Tuukka Lehtonen
*/
public class ComponentTypePropertyTester extends PropertyTester {
/**
* Tests to see if the input Resource is part of a structural component
* type.
*/
private static final String PART_OF = "partOf";
@Override
public boolean test(final Object receiver, final String property, final Object[] args, final Object expectedValue) {
final Resource resource = ResourceAdaptionUtils.toSingleResource(receiver);
if (resource == null)
return false;
Session session = Simantics.peekSession();
if (session == null)
return false;
if (DatabaseJob.inProgress())
return false;
try {
return RequestUtil.trySyncRequest(
session,
SimanticsUI.UI_THREAD_REQUEST_START_TIMEOUT,
SimanticsUI.UI_THREAD_REQUEST_EXECUTION_TIMEOUT,
false,
new UniqueRead() {
@Override
public Boolean perform(ReadGraph g) throws DatabaseException {
return Boolean.valueOf(doTest(g, resource, property, args, expectedValue));
}
});
} catch (DatabaseException | InterruptedException e) {
// Purposefully not logging these exceptions, there might be way too
// many even under normal circumstances.
// TODO: add debug tracing options controlling the printing of these exceptions
return false;
}
}
private boolean doTest(ReadGraph graph, Resource resource, String property, Object[] args, Object expectedValue) throws DatabaseException {
if (PART_OF.equals(property)) {
boolean expected = parseBoolean(expectedValue, true);
boolean is = partOfComponentType(graph, resource) != null;
return is == expected;
}
return false;
}
private Resource partOfComponentType(ReadGraph graph, Resource resource) throws DatabaseException {
Layer0 L0 = Layer0.getInstance(graph);
StructuralResource2 STR = StructuralResource2.getInstance(graph);
Resource componentType = null;
for (Resource curComponent = resource; true;) {
componentType = graph.getPossibleObject(curComponent, STR.Defines);
if (componentType != null) {
return componentType;
}
curComponent = graph.getPossibleObject(curComponent, L0.PartOf);
if (curComponent == null)
break;
}
return null;
}
boolean parseBoolean(Object value, boolean defaultValue) {
if (value instanceof Boolean)
return (Boolean) value;
if (value instanceof String)
return Boolean.parseBoolean((String) value);
return defaultValue;
}
}