Fixes corruption of e4xmi files when class is renamed

The corruption happens in a setup with a top level Maven project and plug-in projects in sub directories (eg bundles). If the name of a Java handler class is renamed in the Java file
the e4xmi file is found twice with
        full workspace path
        plug-in project path
This leads to 2 changes in one e4xmi file with the same text, offset and length.
If the old and new names are of different length the corruption occurs.
This fix skips the change if it is already included for renaming.

Author: p-O-q

e4tools/bundles/org.eclipse.e4.tools.emf.editor3x/META-INF/MANIFEST.MF

@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %Bundle-Name
 Bundle-SymbolicName: org.eclipse.e4.tools.emf.editor3x;singleton:=true
-Bundle-Version: 4.10.200.qualifier
+Bundle-Version: 4.10.300.qualifier
 Bundle-RequiredExecutionEnvironment: JavaSE-21
 Require-Bundle: org.eclipse.ui;bundle-version="3.6.0",
  org.eclipse.core.runtime;bundle-version="3.29.0",

e4tools/bundles/org.eclipse.e4.tools.emf.editor3x/src/org/eclipse/e4/tools/emf/editor3x/refactorparticipants/RefactorParticipantDelegate.java

@@ -15,6 +15,7 @@
  ******************************************************************************/
 package org.eclipse.e4.tools.emf.editor3x.refactorparticipants;
 
+import java.net.URI;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -62,6 +63,9 @@ public static CompositeChange createChange(IProgressMonitor pProgressMonitor, fi
 			@Override
 			public boolean acceptPatternMatch(TextSearchMatchAccess matchAccess) throws CoreException {
 				final IFile file = matchAccess.getFile();
+				if (isFileAlreadyIncluded(file)) {
+					return false;
+				}
 				TextFileChange change = changes.get(file);
 
 				if (change == null) {
@@ -105,6 +109,22 @@ public boolean acceptPatternMatch(TextSearchMatchAccess matchAccess) throws Core
 						edit));
 				return true;
 			}
+
+			/**
+			 * Tests whether the given file is already included in the
+			 * {@code changes} map.
+			 *
+			 * @param file
+			 *            a file to be tested
+			 * @return true if the file has a location URI and is already
+			 *         included in the {@code changes} map otherwise false
+			 */
+			private boolean isFileAlreadyIncluded(IFile file) {
+				final URI uri = file.getLocationURI();
+				return uri != null
+						&& changes.entrySet().stream().anyMatch(
+								e -> uri.equals(e.getKey().getLocationURI()));
+			}
 		};
 
 		CompositeChange result;