1 files changed, 51 insertions, 0 deletions
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf/src/org/eclipse/papyrus/uml/alf/CachingDiagnostician.java b/plugins/uml/alf/org.eclipse.papyrus.uml.alf/src/org/eclipse/papyrus/uml/alf/CachingDiagnostician.java
new file mode 100644
index 00000000000..201a6574f32
--- /dev/null
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf/src/org/eclipse/papyrus/uml/alf/CachingDiagnostician.java
@@ -0,0 +1,51 @@
+/*****************************************************************************
+ * Copyright (c) 2014 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:
+ * 	Ed Seidewitz
+ *****************************************************************************/
+package org.eclipse.papyrus.uml.alf;
+
+import java.util.Map;
+
+import org.eclipse.emf.common.util.DiagnosticChain;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.ecore.EValidator;
+import org.eclipse.xtext.validation.CancelableDiagnostician;
+
+import com.google.inject.Inject;
+
+public class CachingDiagnostician extends CancelableDiagnostician {
+
+	private boolean caching = false;
+
+	@Inject
+	public CachingDiagnostician(Registry registry) {
+		super(registry);
+	}
+
+	public CachingDiagnostician() {
+		this(EValidator.Registry.INSTANCE);
+	}
+
+	@Override
+	public boolean validate(EObject eObject, DiagnosticChain diagnostics, Map<Object, Object> context) {
+		boolean result;
+		if (this.caching) {
+			result = super.validate(eObject, diagnostics, context);
+		} else {
+			this.caching = true;
+			result = super.validate(eObject, diagnostics, context);
+			this.caching = false;
+			RunTimeCaching.clearAll();
+		}
+		return result;
+	}
+
+}