1 files changed, 63 insertions, 0 deletions
diff --git a/plugins/core/org.eclipse.papyrus.properties.runtime/src/org/eclipse/papyrus/properties/runtime/modelhandler/emf/TransactionUtil.java b/plugins/core/org.eclipse.papyrus.properties.runtime/src/org/eclipse/papyrus/properties/runtime/modelhandler/emf/TransactionUtil.java
new file mode 100644
index 00000000000..fd8b0f71007
--- /dev/null
+++ b/plugins/core/org.eclipse.papyrus.properties.runtime/src/org/eclipse/papyrus/properties/runtime/modelhandler/emf/TransactionUtil.java
@@ -0,0 +1,63 @@
+/*****************************************************************************
+ * Copyright (c) 2010 CEA LIST.
+ *    
+ * 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:
+ *  Remi Schnekenburger (CEA LIST) remi.schnekenburger@cea.fr - Initial API and implementation
+ *****************************************************************************/
+package org.eclipse.papyrus.properties.runtime.modelhandler.emf;
+
+import org.eclipse.emf.transaction.Transaction;
+import org.eclipse.emf.transaction.TransactionalEditingDomain;
+import org.eclipse.emf.transaction.impl.InternalTransaction;
+import org.eclipse.emf.transaction.impl.InternalTransactionalEditingDomain;
+
+
+/**
+ * Utility class for transactions
+ */
+public class TransactionUtil {
+
+	/**
+	 * Checks if the current active transaction is a Write transaction or not
+	 * unprotected transaction are not considered write transaction
+	 * 
+	 * @param internalEditingDomain
+	 *        the current internal editing domain, on which transaction are run
+	 * @param includeUnprotected
+	 *        <code>boolean</code> value that if <code>true</code> will consider unprotected
+	 *        transactions when determining if a write transaction is in progress.
+	 * @param otherThread
+	 *        <code>boolean</code> value that if <code>true</code>, will verify whether there is
+	 *        an active transaction only when on a different thread then the caller. This is useful to determine if a
+	 *        deadlock scenario will occur.
+	 * @return <code>true</code> if the current active transaction is a write transaction
+	 */
+	public static boolean isReadTransactionInProgress(TransactionalEditingDomain internalEditingDomain, boolean includeUnprotected, boolean otherThread) {
+		if(!(internalEditingDomain instanceof InternalTransactionalEditingDomain)) {
+			return false;
+		}
+
+		InternalTransaction transaction = ((InternalTransactionalEditingDomain)internalEditingDomain).getActiveTransaction();
+		if(transaction != null && transaction.isReadOnly()) {
+			if(includeUnprotected) {
+				Object unprotectedMode = transaction.getOptions().get(Transaction.OPTION_UNPROTECTED);
+				if(Boolean.FALSE.equals(unprotectedMode)) {
+					return false;
+				}
+			}
+
+			if(otherThread && Thread.currentThread() != transaction.getOwner())
+				return true;
+			else if(!otherThread) {
+				return true;
+			}
+			return true;
+		}
+		return false;
+	}
+}