Simplify booleans when a ternary is returned

src/main/java/org/openrewrite/java/template/processor/RefasterTemplateProcessor.java

@@ -437,6 +437,11 @@ public void visitBinary(JCTree.JCBinary jcBinary) {
                         super.visitBinary(jcBinary);
                     }
 
+                    @Override
+                    public void visitConditional(JCTree.JCConditional jcConditional) {
+                        found = true;
+                    }
+
                     @Override
                     public void visitUnary(JCTree.JCUnary jcUnary) {
                         found |= jcUnary.type.getTag() == TypeTag.BOOLEAN;

src/test/java/org/openrewrite/java/template/RefasterTemplateProcessorTest.java

@@ -43,6 +43,7 @@ class RefasterTemplateProcessorTest {
       "CharacterEscapeAnnotation",
       "MethodThrows",
       "NestedPreconditions",
+      "NewBufferedWriter",
       "UseStringIsEmpty",
       "SimplifyBooleans",
       "FindListAdd",

src/test/resources/refaster/NewBufferedWriter.java

@@ -0,0 +1,35 @@
+/*
+ * 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 foo;
+
+import com.google.errorprone.refaster.annotation.AfterTemplate;
+import com.google.errorprone.refaster.annotation.BeforeTemplate;
+
+import java.io.BufferedWriter;
+import java.io.IOException;
+
+class NewBufferedWriter {
+    @BeforeTemplate
+    BufferedWriter before(String f, Boolean b) throws IOException {
+        return new BufferedWriter(new java.io.FileWriter(f, b));
+    }
+
+    @AfterTemplate
+    BufferedWriter after(String f, Boolean b) throws IOException {
+        return java.nio.file.Files.newBufferedWriter(new java.io.File(f).toPath(), b ?
+                java.nio.file.StandardOpenOption.APPEND : java.nio.file.StandardOpenOption.CREATE);
+    }
+}

src/test/resources/refaster/NewBufferedWriterRecipe.java

@@ -0,0 +1,96 @@
+/*
+ * 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 foo;
+
+import org.jspecify.annotations.NullMarked;
+import org.openrewrite.ExecutionContext;
+import org.openrewrite.Preconditions;
+import org.openrewrite.Recipe;
+import org.openrewrite.TreeVisitor;
+import org.openrewrite.java.JavaParser;
+import org.openrewrite.java.JavaTemplate;
+import org.openrewrite.java.JavaVisitor;
+import org.openrewrite.java.search.*;
+import org.openrewrite.java.template.Primitive;
+import org.openrewrite.java.template.function.*;
+import org.openrewrite.java.template.internal.AbstractRefasterJavaVisitor;
+import org.openrewrite.java.tree.*;
+
+import javax.annotation.Generated;
+import java.util.*;
+
+import static org.openrewrite.java.template.internal.AbstractRefasterJavaVisitor.EmbeddingOption.*;
+
+/**
+ * OpenRewrite recipe created for Refaster template {@code NewBufferedWriter}.
+ */
+@SuppressWarnings("all")
+@NullMarked
+@Generated("org.openrewrite.java.template.processor.RefasterTemplateProcessor")
+public class NewBufferedWriterRecipe extends Recipe {
+
+    /**
+     * Instantiates a new instance.
+     */
+    public NewBufferedWriterRecipe() {}
+
+    @Override
+    public String getDisplayName() {
+        return "Refaster template `NewBufferedWriter`";
+    }
+
+    @Override
+    public String getDescription() {
+        return "Recipe created for the following Refaster template:\n```java\nclass NewBufferedWriter {\n    \n    @BeforeTemplate()\n    BufferedWriter before(String f, Boolean b) throws IOException {\n        return new BufferedWriter(new java.io.FileWriter(f, b));\n    }\n    \n    @AfterTemplate()\n    BufferedWriter after(String f, Boolean b) throws IOException {\n        return java.nio.file.Files.newBufferedWriter(new java.io.File(f).toPath(), b ? java.nio.file.StandardOpenOption.APPEND : java.nio.file.StandardOpenOption.CREATE);\n    }\n}\n```\n.";
+    }
+
+    @Override
+    public TreeVisitor<?, ExecutionContext> getVisitor() {
+        JavaVisitor<ExecutionContext> javaVisitor = new AbstractRefasterJavaVisitor() {
+            final JavaTemplate before = JavaTemplate
+                    .builder("new java.io.BufferedWriter(new java.io.FileWriter(#{f:any(java.lang.String)}, #{b:any(java.lang.Boolean)}))")
+                    .build();
+            final JavaTemplate after = JavaTemplate
+                    .builder("java.nio.file.Files.newBufferedWriter(new java.io.File(#{f:any(java.lang.String)}).toPath(), #{b:any(java.lang.Boolean)} ? java.nio.file.StandardOpenOption.APPEND : java.nio.file.StandardOpenOption.CREATE)")
+                    .build();
+
+            @Override
+            public J visitNewClass(J.NewClass elem, ExecutionContext ctx) {
+                JavaTemplate.Matcher matcher;
+                if ((matcher = before.matcher(getCursor())).find()) {
+                    maybeRemoveImport("java.io.FileWriter");
+                    return embed(
+                            after.apply(getCursor(), elem.getCoordinates().replace(), matcher.parameter(0), matcher.parameter(1)),
+                            getCursor(),
+                            ctx,
+                            SHORTEN_NAMES, SIMPLIFY_BOOLEANS
+                    );
+                }
+                return super.visitNewClass(elem, ctx);
+            }
+
+        };
+        return Preconditions.check(
+                Preconditions.and(
+                        new UsesType<>("java.io.BufferedWriter", true),
+                        new UsesType<>("java.io.FileWriter", true),
+                        new UsesMethod<>("java.io.BufferedWriter <constructor>(..)", true),
+                        new UsesMethod<>("java.io.FileWriter <constructor>(..)", true)
+                ),
+                javaVisitor
+        );
+    }
+}