1 files changed, 48 insertions, 0 deletions
diff --git a/plugins/org.eclipse.emf.compare.rcp.ui/src/org/eclipse/emf/compare/rcp/ui/mergeviewer/item/provider/IMergeViewerItemProvider.java b/plugins/org.eclipse.emf.compare.rcp.ui/src/org/eclipse/emf/compare/rcp/ui/mergeviewer/item/provider/IMergeViewerItemProvider.java
new file mode 100644
index 000000000..694b136fd
--- /dev/null
+++ b/plugins/org.eclipse.emf.compare.rcp.ui/src/org/eclipse/emf/compare/rcp/ui/mergeviewer/item/provider/IMergeViewerItemProvider.java
@@ -0,0 +1,48 @@
+/*******************************************************************************
+ * Copyright (c) 2016 EclipseSource Muenchen GmbH and others.
+ * 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:
+ *     Stefan Dirix - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.emf.compare.rcp.ui.mergeviewer.item.provider;
+
+import java.util.List;
+
+import org.eclipse.emf.compare.rcp.ui.mergeviewer.item.IMergeViewerItem;
+
+/**
+ * The contract for providers responsible for determining root elements in merge viewers. Typically these are
+ * {@link IMergeViewerItem}s but they not necessarily have to be.
+ * 
+ * @author Stefan Dirix <sdirix@eclipsesource.com>
+ * @since 4.4
+ */
+public interface IMergeViewerItemProvider extends IOptionalProvider {
+
+	/**
+	 * Determine the root merge viewer items for the given {@code object}.
+	 * 
+	 * @param object
+	 *            the {@link Object} for which the root merge viewer items are to be determined.
+	 * @param configuration
+	 *            the {@link IMergeViewerItemProviderConfiguration}.
+	 * @return a list of the root elements.
+	 */
+	public List<Object> getMergeViewerItems(Object object,
+			IMergeViewerItemProviderConfiguration configuration);
+
+	/**
+	 * Determine the merge viewer item which shall be selected.
+	 * 
+	 * @param object
+	 *            the {@link Object} for which the selected merge viewer item is to be determined.
+	 * @param configuration
+	 *            the {@link IMergeViewerItemProviderConfiguration}.
+	 * @return the merge viewer item to select.
+	 */
+	public Object getItemToSelect(Object object, IMergeViewerItemProviderConfiguration configuration);
+}