Add utility methods to MergeViewerSide

Change-Id: I25fdfd19c8306271aa827422fc4611d6cf38033c

1 files changed, 23 insertions, 0 deletions

diff --git a/plugins/org.eclipse.emf.compare.rcp.ui/src/org/eclipse/emf/compare/rcp/ui/internal/mergeviewer/IMergeViewer.java b/plugins/org.eclipse.emf.compare.rcp.ui/src/org/eclipse/emf/compare/rcp/ui/internal/mergeviewer/IMergeViewer.java
index 337c98457..2d4afd4bc 100644
--- a/plugins/org.eclipse.emf.compare.rcp.ui/src/org/eclipse/emf/compare/rcp/ui/internal/mergeviewer/IMergeViewer.java
+++ b/plugins/org.eclipse.emf.compare.rcp.ui/src/org/eclipse/emf/compare/rcp/ui/internal/mergeviewer/IMergeViewer.java
@@ -12,6 +12,7 @@ package org.eclipse.emf.compare.rcp.ui.internal.mergeviewer;
 
 import java.util.Collection;
 
+import org.eclipse.emf.compare.DifferenceSource;
 import org.eclipse.emf.compare.rcp.ui.internal.structuremergeviewer.filters.IDifferenceFilter;
 import org.eclipse.emf.compare.rcp.ui.internal.structuremergeviewer.groups.IDifferenceGroupProvider;
 import org.eclipse.jface.viewers.IInputSelectionProvider;
@@ -106,5 +107,27 @@ public interface IMergeViewer extends IInputSelectionProvider {
 					throw new IllegalStateException(); // happy compiler :)
 			}
 		}
+
+		public static MergeViewerSide getValueFrom(DifferenceSource source) {
+			switch (source) {
+				case LEFT:
+					return LEFT;
+				case RIGHT:
+					return RIGHT;
+				default:
+					throw new IllegalStateException();
+			}
+		}
+
+		public DifferenceSource convertToDifferenceSource() {
+			switch (this) {
+				case LEFT:
+					return DifferenceSource.LEFT;
+				case RIGHT:
+					return DifferenceSource.RIGHT;
+				default:
+					throw new IllegalStateException();
+			}
+		}
 	}
 }