Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.modeling.ui / src / org / simantics / modeling / ui / diagram / monitor / MonitorValue.java

diff --git a/bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/diagram/monitor/MonitorValue.java b/bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/diagram/monitor/MonitorValue.java
new file mode 100644 (file)
index 0000000..4bcf2a0
--- /dev/null
+++ b/bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/diagram/monitor/MonitorValue.java
@@ -0,0 +1,47 @@
+/*******************************************************************************\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.modeling.ui.diagram.monitor;\r
+\r
+import org.simantics.basicexpression.Expressions;\r
+import org.simantics.basicexpression.analysis.ExpressionException;\r
+import org.simantics.common.format.Formatter;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.common.request.TernaryRead;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.variable.Variable;\r
+import org.simantics.utils.ui.ErrorLogger;\r
+\r
+final public class MonitorValue extends TernaryRead<String, Formatter, Variable, String> {\r
+\r
+    public MonitorValue(String expression, Formatter formatter, Variable variable) {\r
+        super(expression, formatter, variable);\r
+    }\r
+\r
+    @Override\r
+    public String perform(ReadGraph graph) throws DatabaseException {\r
+        if (parameter == null)\r
+            return null;\r
+\r
+        MonitorExpressionVisitor visitor = new MonitorExpressionVisitor(graph, parameter2, parameter3);\r
+        try {\r
+            Expressions.evaluate(parameter, visitor);\r
+            Object result = visitor.getResult();\r
+            if (result instanceof Throwable)\r
+                return ((Throwable) result).getLocalizedMessage();\r
+            return result != null ? result.toString() : "null";\r
+        } catch (ExpressionException e) {\r
+            ErrorLogger.defaultLogError(e);\r
+            return e.getMessage();\r
+        }\r
+    }\r
+\r
+}\r