Issue #69: resolved removeViolationComments Bug

src/test/java/org/checkstyle/autofix/RemoveViolationComments.java

@@ -17,9 +17,8 @@
 
 package org.checkstyle.autofix;
 
+import java.util.ArrayList;
 import java.util.List;
-import java.util.Objects;
-import java.util.stream.Collectors;
 
 import org.openrewrite.ExecutionContext;
 import org.openrewrite.Recipe;
@@ -49,21 +48,32 @@ public TreeVisitor<?, ExecutionContext> getVisitor() {
     private static final class ViolationCommentRemover extends JavaIsoVisitor<ExecutionContext> {
         @Override
         public Space visitSpace(Space space, Space.Location loc, ExecutionContext ctx) {
-            final StringBuilder suffixAccumulator = new StringBuilder();
+            String suffixAccumulator = null;
+            final List<Comment> filteredComments = new ArrayList<>();
 
-            final List<Comment> filteredComments = space.getComments().stream()
-                    .map(comment -> {
-                        Comment result = comment;
-                        if (!comment.isMultiline() && comment instanceof TextComment) {
-                            final TextComment textComment = (TextComment) comment;
-                            if (textComment.getText().startsWith("violation")) {
-                                suffixAccumulator.append(textComment.getSuffix());
-                                result = null;
-                            }
+            for (Comment comment : space.getComments()) {
+                if (!comment.isMultiline() && comment instanceof TextComment) {
+                    final TextComment textComment = (TextComment) comment;
+                    if (textComment.getText().matches("\\s*(\\d+\\s*)?violation.*")) {
+                        if (filteredComments.isEmpty()) {
+                            suffixAccumulator = textComment.getSuffix();
                         }
-                        return result; })
-                    .filter(Objects::nonNull)
-                    .collect(Collectors.toList());
+                        else {
+                            final int lastIndex = filteredComments.size() - 1;
+                            final Comment previousComment = filteredComments.get(lastIndex);
+                            filteredComments.set(lastIndex,
+                                    previousComment.withSuffix(textComment.getSuffix()));
+                        }
+                    }
+                    else {
+                        filteredComments.add(comment);
+                    }
+
+                }
+                else {
+                    filteredComments.add(comment);
+                }
+            }
 
             Space result;
 
@@ -72,17 +82,8 @@ public Space visitSpace(Space space, Space.Location loc, ExecutionContext ctx) {
             }
             else {
                 result = space.withComments(filteredComments);
-                if (!suffixAccumulator.isEmpty()) {
-                    if (filteredComments.isEmpty()) {
-                        result = result.withWhitespace(suffixAccumulator.toString());
-                    }
-                    else {
-                        final Comment lastComment = filteredComments
-                                .get(filteredComments.size() - 1);
-                        filteredComments.set(filteredComments.size() - 1,
-                                lastComment.withSuffix(suffixAccumulator.toString()));
-                        result = space.withComments(filteredComments);
-                    }
+                if (suffixAccumulator != null) {
+                    result = result.withWhitespace(suffixAccumulator);
                 }
             }
             return super.visitSpace(result, loc, ctx);

src/test/java/org/checkstyle/autofix/recipe/RemoveViolationCommentsTest.java

@@ -0,0 +1,49 @@
+///////////////////////////////////////////////////////////////////////////////////////////////
+// checkstyle-openrewrite-recipes: Automatically fix Checkstyle violations with OpenRewrite.
+// Copyright (C) 2025 The Checkstyle OpenRewrite Recipes Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+///////////////////////////////////////////////////////////////////////////////////////////////
+
+package org.checkstyle.autofix.recipe;
+
+import static org.openrewrite.java.Assertions.java;
+
+import java.io.IOException;
+
+import org.checkstyle.autofix.InputClassRenamer;
+import org.checkstyle.autofix.RemoveViolationComments;
+import org.junit.jupiter.api.Test;
+import org.openrewrite.test.RewriteTest;
+
+import com.puppycrawl.tools.checkstyle.AbstractPathTestSupport;
+
+public class RemoveViolationCommentsTest extends AbstractPathTestSupport implements RewriteTest {
+
+    @Override
+    protected String getPackageLocation() {
+        return "org/checkstyle/autofix/recipe/removeviolationcomments/allcommentvariations";
+    }
+
+    @Test
+    void removeAllViolationCommentPatterns() throws IOException {
+        final String beforeCode = readFile(getPath("InputAllCommentVariations.java"));
+        final String afterCode = readFile(getPath("OutputAllCommentVariations.java"));
+
+        rewriteRun(
+                spec -> {
+                    spec.recipes(new InputClassRenamer(), new RemoveViolationComments());
+                }, java(beforeCode, afterCode)
+        );
+    }
+}

src/test/resources/org/checkstyle/autofix/recipe/removeviolationcomments/allcommentvariations/InputAllCommentVariations.java

@@ -0,0 +1,32 @@
+package org.checkstyle.autofix.recipe.removeviolationcomments.allcommentvariations;
+
+public class InputAllCommentVariations {
+
+    private int field1; // violation
+    private int field2; // 2 violation message
+    private int field3; //   violation
+    private int field4; //  3  violation text
+    private int field5; // violation - missing javadoc
+    private int field6; // 10 violation some descriptive text
+
+    /* This violation should not be removed - multiline */
+    private int field7; // this is not a violation
+    private int field8; // some regular comment
+
+    // Another regular comment
+    private int field9; // violation
+    // violation below
+    private int field10; // random comment
+    private int field11; // 25 violation
+    private int field12;
+    // violation above
+
+    /**
+     * Javadoc with violation word should stay
+     */
+    public void method() {
+        int local; // violation
+        // violation in standalone comment
+        int other; // normal comment
+    }
+}

src/test/resources/org/checkstyle/autofix/recipe/removeviolationcomments/allcommentvariations/OutputAllCommentVariations.java

@@ -0,0 +1,29 @@
+package org.checkstyle.autofix.recipe.removeviolationcomments.allcommentvariations;
+
+public class OutputAllCommentVariations {
+
+    private int field1;
+    private int field2;
+    private int field3;
+    private int field4;
+    private int field5;
+    private int field6;
+
+    /* This violation should not be removed - multiline */
+    private int field7; // this is not a violation
+    private int field8; // some regular comment
+
+    // Another regular comment
+    private int field9;
+    private int field10; // random comment
+    private int field11;
+    private int field12;
+
+    /**
+     * Javadoc with violation word should stay
+     */
+    public void method() {
+        int local;
+        int other; // normal comment
+    }
+}