AboutJavaVersion

src/main/java/org/openrewrite/java/migrate/search/AboutJavaVersion.java

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+/*
+ * Copyright 2021 the original author or authors.
+ * <p>
+ * 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
+ * <p>
+ * https://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.java.migrate.search;
+
+import lombok.EqualsAndHashCode;
+import lombok.Value;
+import org.openrewrite.ExecutionContext;
+import org.openrewrite.Option;
+import org.openrewrite.Recipe;
+import org.openrewrite.TreeVisitor;
+import org.openrewrite.internal.lang.Nullable;
+import org.openrewrite.java.JavaIsoVisitor;
+import org.openrewrite.java.marker.JavaVersion;
+import org.openrewrite.java.search.UsesType;
+import org.openrewrite.java.tree.JavaSourceFile;
+
+@Value
+@EqualsAndHashCode(callSuper = false)
+public class AboutJavaVersion extends Recipe {
+    @Option(required = false,
+            description = "Only mark the Java version when this type is in use.",
+            example = "lombok.val")
+    @Nullable
+    String whenUsesType;
+
+    @Override
+    public String getDisplayName() {
+        return "List calculated information about Java version on source files";
+    }
+
+    @Override
+    public String getDescription() {
+        return super.getDescription();
+    }
+
+    @Override
+    protected @Nullable TreeVisitor<?, ExecutionContext> getSingleSourceApplicableTest() {
+        return whenUsesType == null ? null : new UsesType<>(whenUsesType);
+    }
+
+    @Override
+    protected TreeVisitor<?, ExecutionContext> getVisitor() {
+        return new JavaIsoVisitor<ExecutionContext>() {
+            @Override
+            public JavaSourceFile visitJavaSourceFile(JavaSourceFile cu, ExecutionContext executionContext) {
+                return cu.getMarkers().findFirst(JavaVersion.class)
+                        .map(version -> (JavaSourceFile) cu.withMarkers(cu.getMarkers()
+                                .searchResult("Java version: " + version.getMajorVersion())))
+                        .orElse(cu);
+            }
+        };
+    }
+}

src/main/java/org/openrewrite/java/migrate/search/package-info.java

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+/*
+ * Copyright 2021 the original author or authors.
+ * <p>
+ * 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
+ * <p>
+ * https://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.
+ */
+@NonNullApi
+@NonNullFields
+package org.openrewrite.java.migrate.search;
+
+import org.openrewrite.internal.lang.NonNullApi;
+import org.openrewrite.internal.lang.NonNullFields;

src/test/java/org/openrewrite/java/migrate/search/AboutJavaVersionTest.java

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+/*
+ * Copyright 2021 the original author or authors.
+ * <p>
+ * 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
+ * <p>
+ * https://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.java.migrate.search;
+
+import org.junit.jupiter.api.Test;
+import org.openrewrite.java.marker.JavaVersion;
+import org.openrewrite.test.RewriteTest;
+
+import java.util.UUID;
+
+import static org.openrewrite.java.Assertions.java;
+
+public class AboutJavaVersionTest implements RewriteTest {
+
+    @Test
+    void aboutJavaVersion() {
+        rewriteRun(
+          spec -> spec.recipe(new AboutJavaVersion(null)),
+          java(
+            //language=java
+            """
+                  class Test {
+                  }
+              """,
+            //language=java
+            """
+                  /*~~(Java version: 11)~~>*/class Test {
+                  }
+              """,
+            spec -> spec.markers(new JavaVersion(UUID.randomUUID(), "me", "me", "11.0.15+10", "11.0.15+10"))
+          )
+        );
+    }
+}