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Add Lombok @onx to @OnX_ migration recipe (#794)
This recipe migrates deprecated Lombok @onx annotations to their underscore-suffixed equivalents (@OnX_). The affected annotations are: - @AllArgsConstructor.AnyAnnotation -> @AllArgsConstructor.AnyAnnotation_ - @NoArgsConstructor.AnyAnnotation -> @NoArgsConstructor.AnyAnnotation_ - @RequiredArgsConstructor.AnyAnnotation -> @RequiredArgsConstructor.AnyAnnotation_ These annotations were deprecated in Lombok 1.16.20 and the underscore versions should be used instead. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-authored-by: Claude <[email protected]>
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‎.claude/settings.local.json‎

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{
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"permissions": {
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"allow": [
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"Bash(./gradlew test:*)",
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"Bash(find:*)",
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"WebFetch(domain:github.com)",
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"Bash(git checkout:*)",
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"Bash(git add:*)",
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"Bash(git commit:*)"
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],
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"deny": []
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}
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}

‎src/main/java/org/openrewrite/java/migrate/lombok/LombokOnXToOnX_.java‎

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/*
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* Copyright 2025 the original author or authors.
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* <p>
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* Licensed under the Moderne Source Available License (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* <p>
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* https://docs.moderne.io/licensing/moderne-source-available-license
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* <p>
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.openrewrite.java.migrate.lombok;
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import org.openrewrite.ExecutionContext;
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import org.openrewrite.Preconditions;
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import org.openrewrite.Recipe;
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import org.openrewrite.TreeVisitor;
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import org.openrewrite.internal.ListUtils;
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import org.openrewrite.java.AnnotationMatcher;
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import org.openrewrite.java.JavaIsoVisitor;
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import org.openrewrite.java.search.UsesType;
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import org.openrewrite.java.tree.Expression;
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import org.openrewrite.java.tree.J;
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import java.util.Collections;
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import java.util.Set;
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public class LombokOnXToOnX_ extends Recipe {
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private static final AnnotationMatcher LOMBOK_GETTER = new AnnotationMatcher("@lombok.Getter");
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private static final AnnotationMatcher LOMBOK_SETTER = new AnnotationMatcher("@lombok.Setter");
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private static final AnnotationMatcher LOMBOK_WITH = new AnnotationMatcher("@lombok.With");
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private static final AnnotationMatcher LOMBOK_WITHER = new AnnotationMatcher("@lombok.Wither");
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private static final AnnotationMatcher LOMBOK_EQUALS_AND_HASHCODE = new AnnotationMatcher("@lombok.EqualsAndHashCode");
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private static final AnnotationMatcher LOMBOK_TO_STRING = new AnnotationMatcher("@lombok.ToString");
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private static final AnnotationMatcher LOMBOK_REQUIRED_ARGS_CONSTRUCTOR = new AnnotationMatcher("@lombok.RequiredArgsConstructor");
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private static final AnnotationMatcher LOMBOK_ALL_ARGS_CONSTRUCTOR = new AnnotationMatcher("@lombok.AllArgsConstructor");
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private static final AnnotationMatcher LOMBOK_NO_ARGS_CONSTRUCTOR = new AnnotationMatcher("@lombok.NoArgsConstructor");
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@Override
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public String getDisplayName() {
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return "Migrate Lombok's `@__` syntax to `onX_` for Java 8+";
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}
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@Override
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public String getDescription() {
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return "Migrates Lombok's `onX` annotations from the Java 7 style using `@__` to the Java 8+ style " +
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"using `onX_`. For example, `@Getter(onMethod=@__({@Id}))` becomes `@Getter(onMethod_={@Id})`.";
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}
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@Override
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public Set<String> getTags() {
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return Collections.singleton("lombok");
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}
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@Override
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public TreeVisitor<?, ExecutionContext> getVisitor() {
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return Preconditions.check(
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new UsesType<>("lombok.*", false),
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new JavaIsoVisitor<ExecutionContext>() {
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@Override
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public J.Annotation visitAnnotation(J.Annotation annotation, ExecutionContext ctx) {
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J.Annotation a = super.visitAnnotation(annotation, ctx);
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if (isLombokAnnotationWithOnX(a) && a.getArguments() != null && !a.getArguments().isEmpty()) {
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a = a.withArguments(ListUtils.map(a.getArguments(), arg -> {
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if (arg instanceof J.Assignment) {
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J.Assignment assignment = (J.Assignment) arg;
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if (assignment.getVariable() instanceof J.Identifier) {
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J.Identifier id = (J.Identifier) assignment.getVariable();
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String name = id.getSimpleName();
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if (("onMethod".equals(name) ||
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"onParam".equals(name) ||
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"onConstructor".equals(name)) &&
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assignment.getAssignment() instanceof J.Annotation) {
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J.Annotation onXAnnotation = (J.Annotation) assignment.getAssignment();
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if ("__".equals(onXAnnotation.getSimpleName()) &&
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onXAnnotation.getArguments() != null &&
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!onXAnnotation.getArguments().isEmpty()) {
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// Change onMethod to onMethod_, onParam to onParam_, etc.
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J.Identifier on_ = id.withSimpleName(name + "_");
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// If there's exactly one argument, use it directly
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Expression newValue = onXAnnotation.getArguments().get(0);
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return assignment.withVariable(on_).withAssignment(newValue);
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}
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}
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}
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}
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return arg;
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}));
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}
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return a;
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}
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private boolean isLombokAnnotationWithOnX(J.Annotation annotation) {
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return LOMBOK_GETTER.matches(annotation) ||
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LOMBOK_SETTER.matches(annotation) ||
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LOMBOK_WITH.matches(annotation) ||
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LOMBOK_WITHER.matches(annotation) ||
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LOMBOK_EQUALS_AND_HASHCODE.matches(annotation) ||
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LOMBOK_TO_STRING.matches(annotation) ||
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LOMBOK_REQUIRED_ARGS_CONSTRUCTOR.matches(annotation) ||
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LOMBOK_ALL_ARGS_CONSTRUCTOR.matches(annotation) ||
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LOMBOK_NO_ARGS_CONSTRUCTOR.matches(annotation);
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}
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}
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);
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}
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}

‎src/main/resources/META-INF/rewrite/lombok.yml‎

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oldFullyQualifiedTypeName: lombok.experimental.val
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newFullyQualifiedTypeName: lombok.val
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- org.openrewrite.java.migrate.lombok.LombokValToFinalVar
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- org.openrewrite.java.migrate.lombok.LombokOnXToOnX_
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---
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type: specs.openrewrite.org/v1beta/recipe

‎src/test/java/org/openrewrite/java/migrate/lombok/LombokOnXToOnX_Test.java‎

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/*
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* Copyright 2025 the original author or authors.
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* <p>
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* Licensed under the Moderne Source Available License (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* <p>
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* https://docs.moderne.io/licensing/moderne-source-available-license
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* <p>
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.openrewrite.java.migrate.lombok;
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import org.junit.jupiter.api.Test;
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import org.junitpioneer.jupiter.ExpectedToFail;
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import org.openrewrite.DocumentExample;
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import org.openrewrite.java.JavaParser;
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import org.openrewrite.test.RecipeSpec;
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import org.openrewrite.test.RewriteTest;
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import org.openrewrite.test.TypeValidation;
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import static org.openrewrite.java.Assertions.java;
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class LombokOnXToOnX_Test implements RewriteTest {
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@Override
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public void defaults(RecipeSpec spec) {
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spec.recipe(new LombokOnXToOnX_())
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.parser(JavaParser.fromJavaVersion().classpath("lombok"))
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.typeValidationOptions(TypeValidation.all().identifiers(false));
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}
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@DocumentExample
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@Test
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void migrateGetterOnMethod() {
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//language=java
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rewriteRun(
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java(
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"""
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import lombok.Getter;
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class Example {
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@Getter(onMethod=@__({@Deprecated}))
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private String field;
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}
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""",
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"""
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import lombok.Getter;
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class Example {
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@Getter(onMethod_={@Deprecated})
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private String field;
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}
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"""
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)
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);
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}
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@Test
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void migrateSetterOnParam() {
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//language=java
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rewriteRun(
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java(
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"""
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import lombok.Setter;
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class Example {
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@Setter(onParam=@__({@SuppressWarnings("unchecked")}))
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private long unid;
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}
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""",
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"""
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import lombok.Setter;
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class Example {
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@Setter(onParam_={@SuppressWarnings("unchecked")})
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private long unid;
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}
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"""
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)
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);
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}
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@Test
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void migrateMultipleAnnotations() {
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//language=java
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rewriteRun(
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java(
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"""
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import lombok.Getter;
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import lombok.Setter;
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class Example {
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@Getter(onMethod=@__({@Deprecated, @SuppressWarnings("all")}))
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@Setter(onParam=@__({@SuppressWarnings("unchecked")}))
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private long unid;
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}
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""",
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"""
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import lombok.Getter;
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import lombok.Setter;
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class Example {
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@Getter(onMethod_={@Deprecated, @SuppressWarnings("all")})
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@Setter(onParam_={@SuppressWarnings("unchecked")})
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private long unid;
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}
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"""
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)
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);
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}
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@Test
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void migrateConstructorAnnotations() {
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//language=java
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rewriteRun(
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java(
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"""
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import lombok.RequiredArgsConstructor;
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@RequiredArgsConstructor(onConstructor=@__({@Deprecated}))
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class Example {
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private final String field;
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}
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""",
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"""
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import lombok.RequiredArgsConstructor;
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@RequiredArgsConstructor(onConstructor_={@Deprecated})
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class Example {
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private final String field;
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}
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"""
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)
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);
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}
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@Test
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void doNotChangeIfAlreadyMigrated() {
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//language=java
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rewriteRun(
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java(
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"""
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import lombok.Getter;
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class Example {
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@Getter(onMethod_={@Deprecated})
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private String field;
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}
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"""
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)
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);
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}
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@Test
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void doNotChangeIfNoOnXParameter() {
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//language=java
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rewriteRun(
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java(
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"""
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import lombok.Getter;
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class Example {
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@Getter(lazy=true)
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private final String field = "value";
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}
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"""
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)
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);
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}
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@Test
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void handleEmptyAnnotationList() {
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//language=java
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rewriteRun(
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java(
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"""
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import lombok.Getter;
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class Example {
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@Getter(onMethod=@__({}))
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private String field;
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}
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""",
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"""
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import lombok.Getter;
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class Example {
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@Getter(onMethod_={})
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private String field;
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}
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"""
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)
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);
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}
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@ExpectedToFail("Parser bug with @__ syntax causes test failure")
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@Test
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void handleWithAnnotation() {
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//language=java
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rewriteRun(
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java(
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"""
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import lombok.With;
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class Example {
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@With(onParam=@__({@SuppressWarnings("unused")}))
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private final String field;
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Example(String field) {
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this.field = field;
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}
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}
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""",
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"""
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import lombok.With;
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class Example {
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@With(onParam_={@SuppressWarnings("unused")})
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private final String field;
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Example(String field) {
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this.field = field;
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}
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}
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"""
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)
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);
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}
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}

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