Convert Guava Collections2.filter

Author: lredor

src/main/java/org/openrewrite/java/migrate/guava/NoGuavaCollections2Filter.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2024 the original author or authors.
+ * <p>
+ * 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
+ * <p>
+ * https://docs.moderne.io/licensing/moderne-source-available-license
+ * <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.openrewrite.ExecutionContext;
+import org.openrewrite.Preconditions;
+import org.openrewrite.Recipe;
+import org.openrewrite.TreeVisitor;
+import org.openrewrite.java.JavaIsoVisitor;
+import org.openrewrite.java.JavaTemplate;
+import org.openrewrite.java.MethodMatcher;
+import org.openrewrite.java.search.UsesMethod;
+import org.openrewrite.java.tree.J;
+
+import java.util.Set;
+
+import static java.util.Collections.singleton;
+
+public class NoGuavaCollections2Filter extends Recipe {
+    private static final MethodMatcher COLLECTIONS2_FILTER = new MethodMatcher("com.google.common.collect.Collections2 filter(java.util.Collection, com.google.common.base.Predicate)");
+
+    @Override
+    public String getDisplayName() {
+        return "Prefer `Collection.stream().filter(Predicate)`";
+    }
+
+    @Override
+    public String getDescription() {
+        return "Prefer `Collection.stream().filter(Predicate)` over `Collections2.filter(Collection, Predicate)`.";
+    }
+
+    @Override
+    public Set<String> getTags() {
+        return singleton("guava");
+    }
+
+    @Override
+    public TreeVisitor<?, ExecutionContext> getVisitor() {
+        return Preconditions.check(
+                new UsesMethod<>("com.google.common.collect.Collections2 filter(java.util.Collection, com.google.common.base.Predicate)"),
+                new JavaIsoVisitor<ExecutionContext>() {
+                    @Override
+                    public J.MethodInvocation visitMethodInvocation(J.MethodInvocation method, ExecutionContext ctx) {
+                        if (COLLECTIONS2_FILTER.matches(method)) {
+                            maybeRemoveImport("com.google.common.base.Predicate");
+                            maybeRemoveImport("com.google.common.collect.Collections2");
+                            maybeAddImport("java.util.function.Predicate");
+
+                            return JavaTemplate.builder("#{any(java.util.Collection)}.stream().filter(#{any(java.util.function.Predicate)}).toList()")
+                                    .build()
+                                    .apply(getCursor(),
+                                            method.getCoordinates().replace(),
+                                            method.getArguments().get(0),
+                                            method.getArguments().get(1));
+                        }
+                        return super.visitMethodInvocation(method, ctx);
+                    }
+                }
+        );
+    }
+}

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

@@ -27,6 +27,7 @@ tags:
 recipeList:
   - org.openrewrite.java.migrate.guava.NoGuavaJava11
   - org.openrewrite.java.migrate.guava.NoGuavaJava21
+  - org.openrewrite.java.migrate.guava.NoGuavaCollections2Filter
   - org.openrewrite.java.migrate.guava.NoGuavaCreateTempDir
   - org.openrewrite.java.migrate.guava.NoGuavaDirectExecutor
   - org.openrewrite.java.migrate.guava.NoGuavaInlineMeMethods

src/test/java/org/openrewrite/java/migrate/guava/NoGuavaCollections2FilterTest.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2024 the original author or authors.
+ * <p>
+ * 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
+ * <p>
+ * https://docs.moderne.io/licensing/moderne-source-available-license
+ * <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.DocumentExample;
+import org.openrewrite.InMemoryExecutionContext;
+import org.openrewrite.java.JavaParser;
+import org.openrewrite.test.RecipeSpec;
+import org.openrewrite.test.RewriteTest;
+
+import static org.openrewrite.java.Assertions.java;
+
+class NoGuavaCollections2FilterTest implements RewriteTest {
+
+    @Override
+    public void defaults(RecipeSpec spec) {
+        spec
+          .recipe(new NoGuavaCollections2Filter())
+          .parser(JavaParser.fromJavaVersion().classpathFromResources(new InMemoryExecutionContext(), "guava"));
+    }
+
+    @DocumentExample
+    @Test
+    void replaceSetsFilter() {
+        //language=java
+        rewriteRun(
+          java(
+            """
+              import java.util.ArrayList;
+              import java.util.Collection;
+              import java.util.Objects;
+
+              import com.google.common.base.Predicate;
+              import com.google.common.collect.Collections2;
+
+              class Test {
+                  public static Collection<Object> test() {
+                      Collection<Object> collection = new ArrayList<>();
+                      Predicate<Object> isNotNull = Objects::nonNull;
+                      return Collections2.filter(collection, isNotNull);
+                  }
+              }
+              """,
+            """
+              import java.util.ArrayList;
+              import java.util.Collection;
+              import java.util.Objects;
+
+              import com.google.common.base.Predicate;
+
+              class Test {
+                  public static Collection<Object> test() {
+                      Collection<Object> collection = new ArrayList<>();
+                      Predicate<Object> isNotNull = Objects::nonNull;
+                      return collection.stream().filter(isNotNull).toList();
+                  }
+              }
+              """
+          )
+        );
+    }
+}