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/*
 * Copyright 2024 the original author or authors.
 * 

* Licensed under the Moderne Source Available License (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at *

* https://docs.moderne.io/licensing/moderne-source-available-license *

* 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.openrewrite.staticanalysis; import org.openrewrite.ExecutionContext; import org.openrewrite.Preconditions; import org.openrewrite.Recipe; import org.openrewrite.TreeVisitor; import org.openrewrite.internal.ListUtils; import org.openrewrite.java.JavaIsoVisitor; import org.openrewrite.java.JavaVisitor; import org.openrewrite.java.search.FindRepeatableAnnotations; import org.openrewrite.java.tree.J; import java.util.ArrayList; import java.util.List; public class UnwrapRepeatableAnnotations extends Recipe { @Override public String getDisplayName() { return "Unwrap `@Repeatable` annotations"; } @Override public String getDescription() { return "Java 8 introduced the concept of `@Repeatable` annotations, " + "making the wrapper annotation unnecessary."; } @Override public TreeVisitor getVisitor() { return Preconditions.check(new FindRepeatableAnnotations(), new JavaIsoVisitor() { @Override public J.MethodDeclaration visitMethodDeclaration(J.MethodDeclaration method, ExecutionContext ctx) { J.MethodDeclaration m = super.visitMethodDeclaration(method, ctx); List ann = unwrap(m.getLeadingAnnotations()); if (ann.isEmpty()) { return m; } return maybeAutoFormat(m, m.withLeadingAnnotations(ann), ann.get(ann.size() - 1), ctx, getCursor().getParentOrThrow()); } @Override public J.ClassDeclaration visitClassDeclaration(J.ClassDeclaration classDecl, ExecutionContext ctx) { J.ClassDeclaration c = super.visitClassDeclaration(classDecl, ctx); List ann = unwrap(c.getLeadingAnnotations()); if (ann.isEmpty()) { return c; } return maybeAutoFormat(c, c.withLeadingAnnotations(ann), ann.get(ann.size() - 1), ctx, getCursor().getParentOrThrow()); } @Override public J.VariableDeclarations visitVariableDeclarations(J.VariableDeclarations multiVariable, ExecutionContext ctx) { J.VariableDeclarations v = super.visitVariableDeclarations(multiVariable, ctx); List ann = unwrap(v.getLeadingAnnotations()); if (ann.isEmpty()) { return v; } return maybeAutoFormat(v, v.withLeadingAnnotations(ann), ann.get(ann.size() - 1), ctx, getCursor().getParentOrThrow()); } private List unwrap(List annotations) { return ListUtils.flatMap(annotations, a -> { List unwrapped = new ArrayList<>(1); new JavaVisitor() { @Override public J visitAnnotation(J.Annotation annotation, Integer p) { if (annotation != a && FindRepeatableAnnotations.isRepeatable(annotation.getType())) { unwrapped.add(annotation); } return super.visitAnnotation(annotation, p); } }.visit(a, 0); return unwrapped.isEmpty() ? a : unwrapped; }); } }); } }





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