From 29da75dac2ae1ef47322e95d44a24ba0583997da Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mi=C5=82osz=20Sobczyk?= <miloszsobczyk@google.com>
Date: Thu, 26 Mar 2026 06:00:03 -0700
Subject: [PATCH] refactor: add precondition null check to SchemaUtils

PiperOrigin-RevId: 889790941
---
 core/src/main/java/com/google/adk/SchemaUtils.java | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/core/src/main/java/com/google/adk/SchemaUtils.java b/core/src/main/java/com/google/adk/SchemaUtils.java
index 644aa6ded..200865d33 100644
--- a/core/src/main/java/com/google/adk/SchemaUtils.java
+++ b/core/src/main/java/com/google/adk/SchemaUtils.java
@@ -17,6 +17,7 @@
 package com.google.adk;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
+import com.google.common.base.Preconditions;
 import com.google.genai.types.Schema;
 import com.google.genai.types.Type;
 import java.util.HashMap;
@@ -87,6 +88,7 @@ private static Boolean matchType(Object value, Schema schema, Boolean isInput) {
    * @throws IllegalArgumentException If the map does not match the schema.
    */
   public static void validateMapOnSchema(Map<String, Object> args, Schema schema, Boolean isInput) {
+    Preconditions.checkNotNull(isInput, "IsInput cannot be null");
     Map<String, Schema> properties = schema.properties().get();
     for (Entry<String, Object> arg : args.entrySet()) {
       // Check if the argument is in the schema.