diff --git a/src/main/java/org/openrewrite/staticanalysis/ReplaceCollectToListWithToList.java b/src/main/java/org/openrewrite/staticanalysis/ReplaceCollectToListWithToList.java new file mode 100644 index 000000000..de3db13c3 --- /dev/null +++ b/src/main/java/org/openrewrite/staticanalysis/ReplaceCollectToListWithToList.java @@ -0,0 +1,92 @@ +/* + * Copyright 2025 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.java.JavaTemplate; +import org.openrewrite.java.JavaVisitor; +import org.openrewrite.java.MethodMatcher; +import org.openrewrite.java.search.UsesJavaVersion; +import org.openrewrite.java.search.UsesMethod; +import org.openrewrite.java.tree.J; + +import java.time.Duration; + +/** + * Replaces Stream.collect(Collectors.toList()) with Stream.toList() + *
+ * [POC] rewrite-maven-plugin: Introduce OpenRewrite by Moderne
+ * Modernize codebase with Java improvements
+ * suppression request
+ *
+ */
+public class ReplaceCollectToListWithToList extends Recipe {
+
+ private static final MethodMatcher COLLECT_TO_LIST = new MethodMatcher("java.util.stream.Stream collect(java.util.stream.Collector)");
+
+ @Override
+ public String getDisplayName() {
+ return "Replace `Stream.collect(collectors.toList())` with `Stream.toList()`";
+ }
+
+ @Override
+ public String getDescription() {
+ return "Replace Java 11 `Stream.collect(Collectors.toList())` with Java 16+ `Stream.toList()` for more concise syntax and an unmodifiable return value.";
+ }
+
+ @Override
+ public Duration getEstimatedEffortPerOccurrence() {
+ return Duration.ofMinutes(1);
+ }
+
+ @Override
+ public TreeVisitor, ExecutionContext> getVisitor() {
+ return Preconditions.check(Preconditions.and(
+ new UsesJavaVersion<>(16),
+ new UsesMethod<>(COLLECT_TO_LIST)),
+ new JavaVisitor
+ * 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.junit.jupiter.api.Test;
+import org.openrewrite.test.RecipeSpec;
+import org.openrewrite.test.RewriteTest;
+
+import static org.openrewrite.java.Assertions.java;
+import static org.openrewrite.java.Assertions.version;
+
+class InvertReplaceCollectToListWithToListTest implements RewriteTest {
+
+ @Override
+ public void defaults(RecipeSpec spec) {
+ spec.recipe(new ReplaceCollectToListWithToList());
+ }
+
+ @DocumentExample
+ @Test
+ void replacesCollectToList() {
+ rewriteRun(
+ version(
+ //language=java
+ java(
+ """
+ package com.example;
+
+ import java.util.stream.Collectors;
+ import java.util.stream.Stream;
+
+ class Example {
+ public void test() {
+ Stream.of().collect(Collectors.toList());
+ }
+ }
+ """,
+ """
+ package com.example;
+
+ import java.util.stream.Stream;
+
+ class Example {
+ public void test() {
+ Stream.of().toList();
+ }
+ }
+ """),
+ 17));
+ }
+
+ @Test
+ void replacesCollectToListKeepImport() {
+ rewriteRun(
+ version(
+ //language=java
+ java(
+ """
+ package com.example;
+
+ import java.util.List;
+ import java.util.stream.Collector;
+ import java.util.stream.Collectors;
+ import java.util.stream.Stream;
+
+ class Example {
+ public void test() {
+ Collector