1 files changed, 110 insertions, 0 deletions
diff --git a/plugins/uml/org.eclipse.papyrus.uml.compare/src/org/eclipse/papyrus/compare/element/ElementContentMatchEngine.java b/plugins/uml/org.eclipse.papyrus.uml.compare/src/org/eclipse/papyrus/compare/element/ElementContentMatchEngine.java
new file mode 100644
index 00000000000..ea453ef58fb
--- /dev/null
+++ b/plugins/uml/org.eclipse.papyrus.uml.compare/src/org/eclipse/papyrus/compare/element/ElementContentMatchEngine.java
@@ -0,0 +1,110 @@
+/*****************************************************************************
+ * 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:
+ *  Tatiana Fesenko (CEA LIST) - Initial API and implementation
+ *
+ *****************************************************************************/
+package org.eclipse.papyrus.compare.element;
+
+import org.eclipse.emf.compare.FactoryException;
+import org.eclipse.emf.compare.match.engine.AbstractSimilarityChecker;
+import org.eclipse.emf.compare.match.statistic.MetamodelFilter;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.ecore.resource.Resource;
+import org.eclipse.papyrus.compare.match.PapyrusMatchEngine;
+
+/**
+ * The implementation of MatchEngine to compare two arbitrary elements, not nesseserily diagrams 
+ */
+public class ElementContentMatchEngine extends PapyrusMatchEngine {
+
+	/** The my left. */
+	private final EObject myLeft;
+
+	/** The my right. */
+	private final EObject myRight;
+
+	/**
+	 * Instantiates a new element content match engine.
+	 *
+	 * @param left the left
+	 * @param right the right
+	 */
+	public ElementContentMatchEngine(EObject left, EObject right) {
+		this.myLeft = left;
+		this.myRight = right;
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.papyrus.compare.match.PapyrusMatchEngine#prepareChecker()
+	 */
+	@Override
+	protected AbstractSimilarityChecker prepareChecker() {
+		return new AlwaysSimilarChecker(filter, super.prepareChecker());
+	}
+
+	/**
+	 * The Class AlwaysSimilarChecker.
+	 */
+	private class AlwaysSimilarChecker extends AbstractSimilarityChecker {
+
+		/** The delegate. */
+		private AbstractSimilarityChecker delegate;
+
+		/**
+		 * Instantiates a new always similar checker.
+		 *
+		 * @param filter the filter
+		 * @param fallback the fallback
+		 */
+		public AlwaysSimilarChecker(MetamodelFilter filter, AbstractSimilarityChecker fallback) {
+			super(filter);
+			this.delegate = fallback;
+		}
+
+		/* (non-Javadoc)
+		 * @see org.eclipse.emf.compare.match.engine.AbstractSimilarityChecker#isSimilar(org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecore.EObject)
+		 */
+		/** 
+		 * The standard AbstractSimilarityChecker checks the parent of the elements, 
+		 * thus, compared elements won't be considered similar. 
+		 * To avoid this problem this method always returns true 
+		 **/
+		@Override
+		public boolean isSimilar(EObject obj1, EObject obj2) throws FactoryException {
+			return true;
+		}
+
+		/* (non-Javadoc)
+		 * @see org.eclipse.emf.compare.match.engine.AbstractSimilarityChecker#init(org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecore.EObject)
+		 */
+		@Override
+		public void init(EObject leftObject, EObject rightObject) throws FactoryException {
+			delegate.init(leftObject, rightObject);
+		}
+
+		/* (non-Javadoc)
+		 * @see org.eclipse.emf.compare.match.engine.AbstractSimilarityChecker#init(org.eclipse.emf.ecore.resource.Resource, org.eclipse.emf.ecore.resource.Resource)
+		 */
+		@Override
+		public void init(Resource leftResource, Resource rightResource) throws FactoryException {
+			delegate.init(leftResource, rightResource);
+		}
+
+		/* (non-Javadoc)
+		 * @see org.eclipse.emf.compare.match.engine.AbstractSimilarityChecker#absoluteMetric(org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecore.EObject)
+		 */
+		@Override
+		public double absoluteMetric(EObject obj1, EObject obj2) throws FactoryException {
+			return delegate.absoluteMetric(obj1, obj2);
+		}
+	}
+
+}