--- /dev/null
+/*******************************************************************************\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 org.simantics.browsing.ui.common.modifiers.AbstractEnumerationModifier;\r
+import org.simantics.browsing.ui.common.modifiers.EnumeratedValue;\r
+import org.simantics.browsing.ui.common.modifiers.Enumeration;\r
+import org.simantics.db.Session;\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.utils.ObjectUtils;\r
+\r
+/**\r
+ * A graph resource based EnumerationModifier utility implementation.\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+public abstract class GraphEnumerationModifierBase<T> extends AbstractEnumerationModifier<T> {\r
+\r
+ protected final Session session;\r
+\r
+ public GraphEnumerationModifierBase(Session session, Enumeration<T> enumeration, T value) {\r
+ this(session, enumeration, enumeration.find(value));\r
+ }\r
+\r
+ public GraphEnumerationModifierBase(Session session, Enumeration<T> enumeration, EnumeratedValue<T> value) {\r
+ super(enumeration, value);\r
+ if (session == null)\r
+ throw new NullPointerException("null session");\r
+ this.session = session;\r
+ }\r
+\r
+ @Override\r
+ protected void modifyWithObject(final T oldEnumObject, final T enumObject) {\r
+ if (ObjectUtils.objectEquals(oldEnumObject, enumObject))\r
+ return;\r
+\r
+ try {\r
+ session.getSession().syncRequest(new WriteRequest() {\r
+ @Override\r
+ public void perform(WriteGraph graph) throws DatabaseException {\r
+// System.out.println("old enum object: " + oldEnumObject);\r
+// System.out.println("enum object: " + enumObject);\r
+ modifyWithObject(graph, oldEnumObject, enumObject);\r
+ }\r
+ });\r
+ } catch (DatabaseException e) {\r
+ handleException(e);\r
+ }\r
+ }\r
+\r
+ /**\r
+ * Implement this modifier to perform database modifications.\r
+ * \r
+ * @param graph\r
+ * @param oldEnumObject\r
+ * @param enumObject\r
+ */\r
+ protected abstract void modifyWithObject(WriteGraph graph, T oldEnumObject, T enumObject) throws DatabaseException;\r
+\r
+ /**\r
+ * Client overridable handler for possible exceptions that may occur while\r
+ * performing the database modifications.\r
+ * \r
+ * <p>\r
+ * This default implementation merely forwards the exception as a runtime\r
+ * exception.\r
+ * \r
+ * @param e\r
+ */\r
+ protected void handleException(DatabaseException e) {\r
+ throw new RuntimeException(e);\r
+ }\r
+\r
+\r
+}\r