Add NoGuavaByteStreams Refaster recipe using Java 9+

build.gradle.kts

@@ -60,3 +60,16 @@ dependencies {
     testRuntimeOnly("org.codehaus.groovy:groovy:latest.release")
     testRuntimeOnly(gradleApi())
 }
+
+// Add a source set for refaster rules that allows for Java 9+ syntax
+sourceSets {
+    val refaster = create("refaster") {
+        java {
+            compileClasspath += sourceSets.main.get().output + sourceSets.main.get().compileClasspath
+            runtimeClasspath += sourceSets.main.get().output + sourceSets.main.get().runtimeClasspath
+            annotationProcessorPath += sourceSets.main.get().annotationProcessorPath
+        }
+    }
+    sourceSets.test.get().compileClasspath += refaster.output
+    sourceSets.test.get().runtimeClasspath += refaster.output
+}

src/main/resources/META-INF/rewrite/no-guava.yml

@@ -75,6 +75,7 @@ tags:
   - java11
 recipeList:
   - org.openrewrite.java.migrate.guava.NoGuava
+  - org.openrewrite.java.migrate.guava.NoGuavaByteStreamsRecipes
   - org.openrewrite.java.migrate.guava.PreferJavaUtilObjectsRequireNonNullElse
 ---
 type: specs.openrewrite.org/v1beta/recipe

src/refaster/java/org/openrewrite/java/migrate/guava/NoGuavaByteStreams.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright 2024 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.guava;
+
+import com.google.common.io.ByteStreams;
+import com.google.errorprone.refaster.annotation.AfterTemplate;
+import com.google.errorprone.refaster.annotation.BeforeTemplate;
+import org.openrewrite.java.template.RecipeDescriptor;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+@RecipeDescriptor(name = "No Guava ByteStreams",
+        description = "Replaces Guava ByteStreams with Java 9+ alternatives.",
+        tags = "guava")
+public class NoGuavaByteStreams {
+    private NoGuavaByteStreams() {
+    }
+
+    @RecipeDescriptor(
+            name = "ByteStreams#copy",
+            description = "Replaces Guava `ByteStreams.copy` with `InputStream.transferTo`.",
+            tags = "guava")
+    static final class InputStreamTransferTo {
+        @BeforeTemplate
+        long before(InputStream in, OutputStream out) throws IOException {
+            return ByteStreams.copy(in, out);
+        }
+
+        @AfterTemplate
+        long after(InputStream in, OutputStream out) throws IOException {
+            return in.transferTo(out);
+        }
+    }
+
+    @RecipeDescriptor(
+            name = "ByteStreams#toByteArray",
+            description = "Replaces Guava `ByteStreams.toByteArray` with `InputStream.readAllBytes`.",
+            tags = "guava")
+    static final class InputStreamReadAllBytes {
+        @BeforeTemplate
+        byte[] before(InputStream in) throws IOException {
+            return ByteStreams.toByteArray(in);
+        }
+
+        @AfterTemplate
+        byte[] after(InputStream in) throws IOException {
+            return in.readAllBytes();
+        }
+    }
+}

src/test/java/org/openrewrite/java/migrate/guava/NoGuavaByteStreamsTest.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright 2024 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.guava;
+
+import org.junit.jupiter.api.Test;
+import org.openrewrite.java.JavaParser;
+import org.openrewrite.test.RecipeSpec;
+import org.openrewrite.test.RewriteTest;
+
+import static org.openrewrite.java.Assertions.java;
+
+class NoGuavaByteStreamsTest implements RewriteTest {
+    @Override
+    public void defaults(RecipeSpec spec) {
+        spec
+          .recipe(new NoGuavaByteStreamsRecipes())
+          .parser(JavaParser.fromJavaVersion().classpath("guava"));
+    }
+
+    @Test
+    void replace() {
+        rewriteRun(
+          //language=java
+          java(
+            """
+              import com.google.common.io.ByteStreams;
+              import java.io.ByteArrayInputStream;
+              import java.io.ByteArrayOutputStream;
+              import java.io.IOException;
+
+              class InputStreamRulesTest {
+                long testInputStreamTransferTo() throws IOException {
+                  return ByteStreams.copy(new ByteArrayInputStream(new byte[0]), new ByteArrayOutputStream());
+                }
+                byte[] testInputStreamReadAllBytes() throws IOException {
+                  return ByteStreams.toByteArray(new ByteArrayInputStream(new byte[0]));
+                }
+              }
+              """,
+            """
+              import java.io.ByteArrayInputStream;
+              import java.io.ByteArrayOutputStream;
+              import java.io.IOException;
+
+              class InputStreamRulesTest {
+                long testInputStreamTransferTo() throws IOException {
+                  return new ByteArrayInputStream(new byte[0]).transferTo(new ByteArrayOutputStream());
+                }
+                byte[] testInputStreamReadAllBytes() throws IOException {
+                  return new ByteArrayInputStream(new byte[0]).readAllBytes();
+                }
+              }
+              """
+          )
+        );
+    }
+}