1 files changed, 10 insertions, 0 deletions
diff --git a/java/core/src/main/java/com/google/protobuf/Internal.java b/java/core/src/main/java/com/google/protobuf/Internal.java
index 3b4a0412..c234559c 100644
--- a/java/core/src/main/java/com/google/protobuf/Internal.java
+++ b/java/core/src/main/java/com/google/protobuf/Internal.java
@@ -60,6 +60,16 @@ public final class Internal {
   static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1");
 
   /**
+   * Throws an appropriate {@link NullPointerException} if the given objects is {@code null}.
+   */
+  static <T> T checkNotNull(T obj, String message) {
+    if (obj == null) {
+      throw new NullPointerException(message);
+    }
+    return obj;
+  }
+
+  /**
    * Helper called by generated code to construct default values for string
    * fields.
    * <p>