Change Maven property java.version to 11

src/main/resources/META-INF/rewrite/java-version-11.yml

@@ -0,0 +1,33 @@
+#
+# Copyright 2022 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.
+#
+---
+type: specs.openrewrite.org/v1beta/recipe
+name: org.openrewrite.java.migrate.JavaVersion11
+displayName: Change Maven Java version property values to 11
+description: Change maven.compiler.source and maven.compiler.target values to 11.
+recipeList:
+  - org.openrewrite.maven.ChangePropertyValue:
+      key: java.version
+      newValue: 11
+      addIfMissing: false
+  - org.openrewrite.maven.ChangePropertyValue:
+      key: maven.compiler.source
+      newValue: 11
+      addIfMissing: false
+  - org.openrewrite.maven.ChangePropertyValue:
+      key: maven.compiler.target
+      newValue: 11
+      addIfMissing: false

src/main/resources/META-INF/rewrite/java8-to-java11.yml

@@ -45,3 +45,4 @@ recipeList:
   - org.openrewrite.java.migrate.javax.JavaxXmlStreamAPIs
   - org.openrewrite.java.migrate.wro4j.UpgradeWro4jMavenPluginVersion
   - org.openrewrite.java.migrate.jacoco.UpgradeJaCoCoMavenPluginVersion
+  - org.openrewrite.java.migrate.JavaVersion11

src/test/kotlin/org/openrewrite/java/migrate/JavaVersion11Test.kt

@@ -0,0 +1,91 @@
+/*
+ * Copyright 2022 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
+
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Test
+import org.openrewrite.Recipe
+import org.openrewrite.config.Environment
+import org.openrewrite.maven.MavenRecipeTest
+
+class JavaVersion11Test : MavenRecipeTest {
+    override val recipe: Recipe = Environment.builder()
+        .scanRuntimeClasspath("org.openrewrite.java.migrate")
+        .build()
+        .activateRecipes("org.openrewrite.java.migrate.JavaVersion11")
+
+    @Test
+    fun changeJavaVersion() = assertChanged(
+        before = """
+            <project>
+              <modelVersion>4.0.0</modelVersion>
+
+              <properties>
+                <java.version>1.8</java.version>
+              </properties>
+
+              <groupId>com.mycompany.app</groupId>
+              <artifactId>my-app</artifactId>
+              <version>1</version>
+            </project>
+        """,
+        after = """
+            <project>
+              <modelVersion>4.0.0</modelVersion>
+
+              <properties>
+                <java.version>11</java.version>
+              </properties>
+
+              <groupId>com.mycompany.app</groupId>
+              <artifactId>my-app</artifactId>
+              <version>1</version>
+            </project>
+        """
+    )
+
+    @Test
+    fun changeMavenCompiler() = assertChanged(
+        before = """
+            <project>
+              <modelVersion>4.0.0</modelVersion>
+
+              <properties>
+                <maven.compiler.source>1.8</maven.compiler.source>
+                <maven.compiler.target>1.8</maven.compiler.target>
+              </properties>
+
+              <groupId>com.mycompany.app</groupId>
+              <artifactId>my-app</artifactId>
+              <version>1</version>
+            </project>
+        """,
+        after = """
+            <project>
+              <modelVersion>4.0.0</modelVersion>
+
+              <properties>
+                <maven.compiler.source>11</maven.compiler.source>
+                <maven.compiler.target>11</maven.compiler.target>
+              </properties>
+
+              <groupId>com.mycompany.app</groupId>
+              <artifactId>my-app</artifactId>
+              <version>1</version>
+            </project>
+        """
+    )
+}