1 files changed, 115 insertions, 0 deletions
diff --git a/plugins/facet/org.eclipse.papyrus.emf.facet.util.ui/src/org/eclipse/papyrus/emf/facet/util/ui/internal/exported/displaysync/SynchronizedObject.java b/plugins/facet/org.eclipse.papyrus.emf.facet.util.ui/src/org/eclipse/papyrus/emf/facet/util/ui/internal/exported/displaysync/SynchronizedObject.java
new file mode 100644
index 00000000000..6302ad4defe
--- /dev/null
+++ b/plugins/facet/org.eclipse.papyrus.emf.facet.util.ui/src/org/eclipse/papyrus/emf/facet/util/ui/internal/exported/displaysync/SynchronizedObject.java
@@ -0,0 +1,115 @@
+/*******************************************************************************
+ * Copyright (c) 2011 Mia-Software.
+ * 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:
+ *    Grégoire Dupé (Mia-Software) - Bug 365808 - [Unit Test Failure][0.2/4.2][0.2/3.8] org.eclipse.emf.facet.widgets.nattable.tests.NatTableAPITests
+ *    Grégoire Dupé (Mia-Software) - Bug 367153 - synchronization utilities
+ *    Gregoire Dupe (Mia-Software) - Bug 369987 - [Restructuring][Table] Switch to the new customization and facet framework
+ *    Grégoire Dupé (Mia-Software) - Bug 387470 - [EFacet][Custom] Editors
+ *******************************************************************************/
+package org.eclipse.emf.facet.util.ui.internal.exported.displaysync;
+
+import org.eclipse.swt.widgets.Display;
+
+/**
+ * <ul>
+ * <li>syncExecWithResult (has return type, throws exception)
+ * <li>safeSyncExec (has return type, no exception)
+ * <li>voidSyncExec (no return type, throws exception)
+ * <li>voidExceptionFreeRunnable (no return type, no exception)
+ * </ul>
+ */
+public class SynchronizedObject<O extends Object> {
+
+	private final O object;
+	private final Thread widgetThread;
+	private final Display display;
+
+	public SynchronizedObject(final O object, final Display display) {
+		this.object = object;
+		this.display = display;
+		this.widgetThread = this.display.getThread();
+	}
+	
+	protected final <T, E extends Exception> T syncExecWithResult(
+			final IRunnable<T, E> runnable) throws E {
+		T result;
+		if (this.widgetThread == Thread.currentThread()) {
+			result = runnable.run();
+		} else {
+			final ExceptionHandler exceptionHandler = new ExceptionHandler();
+			final Object[] resultHandler = new Object[1];
+			this.display.syncExec(new java.lang.Runnable() {
+				public void run() {
+					try {
+						resultHandler[0] = runnable.run();
+					} catch (final Exception e) {
+						exceptionHandler.setException(e);
+					}
+
+				}
+			});
+			if (exceptionHandler.getException() != null) {
+				@SuppressWarnings("unchecked")
+				// @SuppressWarnings("unchecked") This cast is safe because
+				// "exceptionHandler" contains an exception thrown by "runnable"
+				// and
+				// "runnable" throws by definition a instance of E
+				final E castException = (E) exceptionHandler.getException();
+				throw castException;
+			}
+			@SuppressWarnings("unchecked")
+			// @SuppressWarnings("unchecked") This cast is safe because
+			// "resultHandler" contains a value returned by "runnable" and
+			// "runnable" returns by definition a instance of T
+			final T tmpResult = (T) resultHandler[0];
+			result = tmpResult;
+		}
+		return result;
+	}
+	
+	protected class ExceptionHandler {
+
+		private Exception exception;
+
+		public Exception getException() {
+			return this.exception;
+		}
+
+		public void setException(final Exception exception) {
+			this.exception = exception;
+		}
+	}
+
+	protected final <E extends Exception> void voidSyncExec(
+			final AbstractVoidRunnable<E> runnable) throws E {
+		this.syncExecWithResult(runnable);
+	}
+
+	protected final <T> T safeSyncExec(
+			final AbstractExceptionFreeRunnable<T> runnable) {
+		try {
+			return this.syncExecWithResult(runnable);
+		} catch (final Exception e) {
+			throw new DisplaySyncRuntimeException(e);
+		}
+	}
+
+	protected final void voidExceptionFreeRunnable(
+			final AbstractVoidExceptionFreeRunnable runnable) {
+		try {
+			this.syncExecWithResult(runnable);
+		} catch (final Exception e) {
+			throw new DisplaySyncRuntimeException(e);
+		}
+	}
+	
+	public O getSynchronizedObject() {
+		return this.object;
+	}
+
+}