chore: improve jacoco coverage report

PiperOrigin-RevId: 743913479

Author: sararob

pom.xml

@@ -302,6 +302,9 @@
               <formats>
                 <format>HTML</format>
               </formats>
+              <excludes>
+                <exclude>com/google/genai/types/AutoValue_*.class</exclude>
+              </excludes>
             </configuration>
           </execution>
         </executions>

src/main/java/com/google/genai/ExcludeFromGeneratedCoverageReport.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2025 Google LLC
+ *
+ * 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
+ *
+ *      https://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.google.genai;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Annotation to exclude a method or constructor from the Jacoco coverage report.
+ *
+ * <p>Jacoco will exclude methods that have an annotation with the word "generated" in it.
+ */
+@Retention(RetentionPolicy.CLASS)
+@Target({ElementType.METHOD, ElementType.CONSTRUCTOR, ElementType.TYPE})
+@interface ExcludeFromGeneratedCoverageReport {}