Internal changes/optimizations

PiperOrigin-RevId: 635516715

java/core/src/main/java/com/google/protobuf/ExtensionRegistryFactory.java

@@ -48,7 +48,8 @@ final class ExtensionRegistryFactory {
   }
 
   static boolean isFullRegistry(ExtensionRegistryLite registry) {
-    return EXTENSION_REGISTRY_CLASS != null
+    return !Protobuf.assumeLiteRuntime
+        && EXTENSION_REGISTRY_CLASS != null
         && EXTENSION_REGISTRY_CLASS.isAssignableFrom(registry.getClass());
   }
 

java/core/src/main/java/com/google/protobuf/ExtensionSchemas.java

@@ -13,6 +13,9 @@ final class ExtensionSchemas {
   private static final ExtensionSchema<?> FULL_SCHEMA = loadSchemaForFullRuntime();
 
   private static ExtensionSchema<?> loadSchemaForFullRuntime() {
+    if (Protobuf.assumeLiteRuntime) {
+      return null;
+    }
     try {
       Class<?> clazz = Class.forName("com.google.protobuf.ExtensionSchemaFull");
       return (ExtensionSchema) clazz.getDeclaredConstructor().newInstance();

java/core/src/main/java/com/google/protobuf/ListFieldSchemas.java

@@ -21,6 +21,9 @@ final class ListFieldSchemas {
   }
 
   private static ListFieldSchema loadSchemaForFullRuntime() {
+    if (Protobuf.assumeLiteRuntime) {
+      return null;
+    }
     try {
       Class<?> clazz = Class.forName("com.google.protobuf.ListFieldSchemaFull");
       return (ListFieldSchema) clazz.getDeclaredConstructor().newInstance();

java/core/src/main/java/com/google/protobuf/MapFieldSchemas.java

@@ -21,6 +21,9 @@ final class MapFieldSchemas {
   }
 
   private static MapFieldSchema loadSchemaForFullRuntime() {
+    if (Protobuf.assumeLiteRuntime) {
+      return null;
+    }
     try {
       Class<?> clazz = Class.forName("com.google.protobuf.MapFieldSchemaFull");
       return (MapFieldSchema) clazz.getDeclaredConstructor().newInstance();

java/core/src/main/java/com/google/protobuf/NewInstanceSchemas.java

@@ -21,6 +21,9 @@ final class NewInstanceSchemas {
   }
 
   private static NewInstanceSchema loadSchemaForFullRuntime() {
+    if (Protobuf.assumeLiteRuntime) {
+      return null;
+    }
     try {
       Class<?> clazz = Class.forName("com.google.protobuf.NewInstanceSchemaFull");
       return (NewInstanceSchema) clazz.getDeclaredConstructor().newInstance();

java/core/src/main/java/com/google/protobuf/SchemaUtil.java

@@ -38,6 +38,7 @@ final class SchemaUtil {
     // TODO decide if we're keeping support for Full in schema classes and handle this
     // better.
     if (!GeneratedMessageLite.class.isAssignableFrom(messageType)
+        && !Protobuf.assumeLiteRuntime
         && GENERATED_MESSAGE_CLASS != null
         && !GENERATED_MESSAGE_CLASS.isAssignableFrom(messageType)) {
       throw new IllegalArgumentException(
@@ -781,6 +782,9 @@ final class SchemaUtil {
   }
 
   private static Class<?> getGeneratedMessageClass() {
+    if (Protobuf.assumeLiteRuntime) {
+      return null;
+    }
     try {
       // TODO decide if we're keeping support for Full in schema classes and handle
       // this better.
@@ -791,6 +795,9 @@ final class SchemaUtil {
   }
 
   private static Class<?> getUnknownFieldSetSchemaClass() {
+    if (Protobuf.assumeLiteRuntime) {
+      return null;
+    }
     try {
       return Class.forName("com.google.protobuf.UnknownFieldSetSchema");
     } catch (Throwable e) {