+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in 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.graph.impl;\r
+\r
+import java.util.List;\r
+\r
+import org.simantics.browsing.ui.content.Labeler.EnumerationModifier;\r
+import org.simantics.databoard.Bindings;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.RequestProcessor;\r
+import org.simantics.db.Session;\r
+import org.simantics.db.VirtualGraph;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.db.common.request.WriteRequest;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.variable.Variable;\r
+import org.simantics.db.layer0.variable.Variables;\r
+import org.simantics.db.request.Read;\r
+import org.simantics.utils.datastructures.Callback;\r
+import org.simantics.utils.ui.ErrorLogger;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class EnumerationVariableModifier3 implements EnumerationModifier {\r
+\r
+ protected final Session session;\r
+ protected final Variable variable;\r
+ protected final List<String> allowedValues;\r
+ protected final String defaultValue;\r
+\r
+ protected Throwable modifierFailed;\r
+\r
+ public EnumerationVariableModifier3(RequestProcessor processor, Variable variable, List<String> allowedValues) {\r
+\r
+ this.session = processor.getSession();\r
+ this.variable = variable;\r
+ this.allowedValues = allowedValues;\r
+ this.defaultValue = computeDefaultValue(processor, variable);\r
+ //System.err.println(this.defaultValue);\r
+ \r
+ }\r
+\r
+ protected String computeDefaultValue(RequestProcessor processor, final Variable variable) {\r
+ try {\r
+ return processor.syncRequest(new Read<String>() {\r
+ @Override\r
+ public String perform(ReadGraph graph) throws DatabaseException {\r
+ // System.err.println(variable.getURI(graph));\r
+ return variable.getValue(graph);//variable.getPossiblePropertyValue(graph, Variables.LABEL);\r
+ }\r
+ });\r
+ } catch (DatabaseException e) {\r
+ return "";\r
+ }\r
+ }\r
+\r
+ public class Write extends WriteRequest {\r
+\r
+ final private Variable variable;\r
+ final private String label;\r
+\r
+ public Write(Variable variable, String label) {\r
+ super((VirtualGraph)null);\r
+ this.variable = variable;\r
+ this.label = label;\r
+ }\r
+\r
+ @Override\r
+ public void perform(WriteGraph graph) throws DatabaseException {\r
+ variable.setValue(graph, label, Bindings.STRING);\r
+ }\r
+\r
+ }\r
+ \r
+ protected void doModify(final String label) {\r
+ session.asyncRequest(new Write(variable, label),\r
+ new Callback<DatabaseException>() {\r
+ @Override\r
+ public void run(DatabaseException parameter) {\r
+ if (parameter != null)\r
+ ErrorLogger.defaultLogError(parameter);\r
+ }\r
+ });\r
+ }\r
+\r
+ @Override\r
+ public String getValue() {\r
+ return defaultValue;\r
+ }\r
+\r
+ @Override\r
+ public String isValid(String label) {\r
+ if (modifierFailed != null)\r
+ return "Could not resolve validator for this value, modification denied. Reason: "\r
+ + modifierFailed.getMessage();\r
+ // Validity should already be enforced by the editing UI for\r
+ // enumerations.\r
+ return null;\r
+ }\r
+\r
+ @Override\r
+ public final void modify(String label) {\r
+ if (modifierFailed != null)\r
+ // Should never end up here, isValid should prevent it.\r
+ throw new Error("modifier failed: " + modifierFailed.getMessage());\r
+ doModify(label);\r
+ }\r
+\r
+ @Override\r
+ public List<String> getValues() {\r
+ return allowedValues;\r
+ }\r
+\r
+};\r