1 files changed, 43 insertions, 0 deletions
diff --git a/src/main/java/com/code_intelligence/jazzer/mutation/annotation/proto/WithDefaultInstance.java b/src/main/java/com/code_intelligence/jazzer/mutation/annotation/proto/WithDefaultInstance.java
new file mode 100644
index 00000000..e26d73a2
--- /dev/null
+++ b/src/main/java/com/code_intelligence/jazzer/mutation/annotation/proto/WithDefaultInstance.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2023 Code Intelligence GmbH
+ *
+ * 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
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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 com.code_intelligence.jazzer.mutation.annotation.proto;
+
+import static java.lang.annotation.ElementType.TYPE_USE;
+import static java.lang.annotation.RetentionPolicy.RUNTIME;
+
+import com.code_intelligence.jazzer.mutation.annotation.AppliesTo;
+import com.google.protobuf.DynamicMessage;
+import com.google.protobuf.Message;
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+/**
+ * Provides a default instance to use as the base for mutations of the annotated {@link Message} or
+ * {@link DynamicMessage.Builder}.
+ */
+@Target(TYPE_USE)
+@Retention(RUNTIME)
+@AppliesTo(subClassesOf = {Message.class, Message.Builder.class})
+public @interface WithDefaultInstance {
+  /**
+   * The fully qualified name of a static method (e.g.
+   * {@code com.example.MyClass#getDefaultInstance}) with return type assignable to
+   * {@link com.google.protobuf.Message}, which returns a default instance that mutations should be
+   * based on.
+   */
+  String value();
+}