--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2010, 2011 Association for Decentralized Information Management in\r
+ * Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.browsing.ui.model.check;\r
+\r
+import org.simantics.browsing.ui.BuiltinKeys;\r
+import org.simantics.browsing.ui.CheckedState;\r
+import org.simantics.browsing.ui.NodeContext;\r
+import org.simantics.browsing.ui.model.InvalidContribution;\r
+import org.simantics.browsing.ui.model.nodetypes.NodeType;\r
+import org.simantics.browsing.ui.model.tests.Test;\r
+import org.simantics.browsing.ui.model.visuals.VisualsContribution;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+\r
+/**\r
+ * Produces images for nodes of given node type.\r
+ * @author Hannu Niemistö\r
+ */\r
+public class CheckedStateContribution extends VisualsContribution {\r
+ \r
+ CheckedStateRule stateRule;\r
+ \r
+ public CheckedStateContribution(NodeType nodeType, Test test, CheckedStateRule stateRule, double priority) throws InvalidContribution {\r
+ super(nodeType, test, priority);\r
+ if(!stateRule.isCompatible(\r
+ nodeType.getContentType()\r
+ ))\r
+ throw new InvalidContribution("image rule is not compatible with the content type.");\r
+ this.stateRule = stateRule;\r
+ } \r
+ \r
+ /**\r
+ * Returns a image for the node or null, if contribution is\r
+ * not suitable for the input.\r
+ */\r
+ public CheckedState getCheckedState(ReadGraph graph, NodeContext context) {\r
+ Object content = context.getConstant(BuiltinKeys.INPUT);\r
+ try {\r
+ if(test == null || test.test(graph, content))\r
+ return stateRule.getCheckedState(graph, content);\r
+ else\r
+ return null;\r
+ } catch(DatabaseException e) {\r
+ // TODO reconsider\r
+ return null;\r
+ }\r
+ }\r
+}\r