From ef5e9d4c56880e6bd6936aef0de8f1c4001445e8 Mon Sep 17 00:00:00 2001
From: tsantalis <tsantalis@gmail.com>
Date: Sun, 15 Dec 2024 16:49:51 -0500
Subject: [PATCH] Further pushing optimize(TreeSet<UMLClassRenameDiff> diffSet)

https://github.com/checkstyle/checkstyle/commit/7ddc532f01361e832f6ebd32c399f20918f5a388
---
 .../gr/uom/java/xmi/diff/UMLModelDiff.java    | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/main/java/gr/uom/java/xmi/diff/UMLModelDiff.java b/src/main/java/gr/uom/java/xmi/diff/UMLModelDiff.java
index 90357b58e6..2a8f3deff2 100644
--- a/src/main/java/gr/uom/java/xmi/diff/UMLModelDiff.java
+++ b/src/main/java/gr/uom/java/xmi/diff/UMLModelDiff.java
@@ -1129,6 +1129,7 @@ private TreeSet<UMLClassRenameDiff> optimize(TreeSet<UMLClassRenameDiff> diffSet
 			TreeSet<UMLClassRenameDiff> identicalStatementDiffSet = new TreeSet<UMLClassRenameDiff>(new ClassRenameComparator());
 			TreeSet<UMLClassRenameDiff> identicalSignatureDiffSet = new TreeSet<UMLClassRenameDiff>(new ClassRenameComparator());
 			TreeSet<UMLClassRenameDiff> identicalPackageDeclarationDocDiffSet = new TreeSet<UMLClassRenameDiff>(new ClassRenameComparator());
+			TreeMap<Integer, TreeSet<UMLClassRenameDiff>> matchingStatementMap = new TreeMap<Integer, TreeSet<UMLClassRenameDiff>>();
 			for(UMLClassRenameDiff diff : diffSet) {
 				if(diff.getOriginalClass().getPackageDeclarationJavadoc() != null && diff.getNextClass().getPackageDeclarationJavadoc() != null) {
 					if(diff.getOriginalClass().getPackageDeclarationJavadoc().getFullText().equals(diff.getNextClass().getPackageDeclarationJavadoc().getFullText())) {
@@ -1146,6 +1147,7 @@ private TreeSet<UMLClassRenameDiff> optimize(TreeSet<UMLClassRenameDiff> diffSet
 				int identicalSignatures = 0;
 				int identicalStatementSignatures = 0;
 				int totalStatements = 0;
+				int matchingStatements = 0;
 				if(operations1.size() == operations2.size()) {
 					for(int i=0; i<operations1.size(); i++) {
 						UMLOperation op1 = operations1.get(i);
@@ -1169,12 +1171,27 @@ private TreeSet<UMLClassRenameDiff> optimize(TreeSet<UMLClassRenameDiff> diffSet
 								}
 							}
 						}
+						else if(op1.getBody() != null && op2.getBody() != null) {
+							List<String> rep1 = op1.getBody().stringRepresentation();
+							List<String> rep2 = op2.getBody().stringRepresentation();
+							if(rep1.containsAll(rep2) || rep2.containsAll(rep1)) {
+								matchingStatements += Math.min(rep1.size(), rep2.size());
+							}
+						}
 						String actualSignature1 = op1.getActualSignature();
 						String actualSignature2 = op2.getActualSignature();
 						if(actualSignature1 != null && actualSignature2 != null && actualSignature1.equals(actualSignature2)) {
 							identicalSignatures++;
 						}
 					}
+					if(matchingStatementMap.containsKey(matchingStatements)) {
+						matchingStatementMap.get(matchingStatements).add(diff);
+					}
+					else {
+						TreeSet<UMLClassRenameDiff> set = new TreeSet<UMLClassRenameDiff>(new ClassRenameComparator());
+						set.add(diff);
+						matchingStatementMap.put(matchingStatements, set);
+					}
 				}
 				if(identicalBodies == operations1.size()) {
 					identicalBodyDiffSet.add(diff);
@@ -1198,6 +1215,10 @@ else if(identicalBodyDiffSet.size() < diffSet.size() && identicalStatementDiffSe
 			if(identicalPackageDeclarationDocDiffSet.size() == 1) {
 				return identicalPackageDeclarationDocDiffSet;
 			}
+			Map.Entry<Integer, TreeSet<UMLClassRenameDiff>> entry = matchingStatementMap.lastEntry();
+			if(entry != null && entry.getValue().size() == 1) {
+				return entry.getValue();
+			}
 		}
 		return diffSet;
 	}