discard original working copy for class files

CsCherrYY · CsCherrYY · commit e88736a33def · 2023-01-09T15:30:43.000+08:00
Signed-off-by: Shi Chen &lt;chenshi@microsoft.com&gt;
diff --git a/org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/handlers/PasteEventHandler.java b/org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/handlers/PasteEventHandler.java
@@ -262,9 +262,11 @@ public static DocumentPasteEdit getMissingImportsWorkspaceEdit(PasteEventParams
 		tempUnit.applyTextEdit(new ReplaceEdit(offset, length, insertText), monitor);
 		if (originalDocumentUri != null) {
 			ICompilationUnit tempOriginalUnit = JDTUtils.resolveCompilationUnit(originalDocumentUri);
+			boolean isClassFile = false;
 			if (tempOriginalUnit == null) {
 				IClassFile classFile = JDTUtils.resolveClassFile(originalDocumentUri);
 				if (classFile != null) {
+					isClassFile = true;
 					tempOriginalUnit = classFile.getWorkingCopy(new WorkingCopyOwner() {
 					}, monitor);
 				}
@@ -284,7 +286,9 @@ public static DocumentPasteEdit getMissingImportsWorkspaceEdit(PasteEventParams
 					return candidates.toArray(new ImportCandidate[] {});
 				};
 			}
-			tempOriginalUnit.discardWorkingCopy();
+			if (isClassFile) {
+				tempOriginalUnit.discardWorkingCopy();
+			}
 		}
 		TextEdit edit = OrganizeImportsHandler.organizeImports(tempUnit, chooseFunc, true, monitor);
 		if (edit == null) {
