diff --git a/libnativeloader/Android.bp b/libnativeloader/Android.bp
index 3b77a9e..debc43f 100644
--- a/libnativeloader/Android.bp
+++ b/libnativeloader/Android.bp
@@ -30,6 +30,7 @@
         android: {
             srcs: [
                 "library_namespaces.cpp",
+                "native_loader_namespace.cpp",
                 "public_libraries.cpp",
             ],
             shared_libs: [
diff --git a/libnativeloader/README.md b/libnativeloader/README.md
new file mode 100644
index 0000000..46f6fdd
--- /dev/null
+++ b/libnativeloader/README.md
@@ -0,0 +1,84 @@
+libnativeloader
+===============================================================================
+
+Overview
+-------------------------------------------------------------------------------
+libnativeloader is responsible for loading native shared libraries (`*.so`
+files) inside the Android Runtime (ART). The native shared libraries could be
+app-provided JNI libraries or public native libraries like `libc.so` provided
+by the platform.
+
+The most typical use case of this library is calling `System.loadLibrary(name)`.
+When the method is called, the ART runtime delegates the call to this library
+along with the reference to the classloader where the call was made.  Then this
+library finds the linker namespace (named `classloader-namespace`) that is
+associated with the given classloader, and tries to load the requested library
+from the namespace. The actual searching, loading, and linking of the library
+is performed by the dynamic linker.
+
+The linker namespace is created when an APK is loaded into the process, and is
+associated with the classloader that loaded the APK. The linker namespace is
+configured so that only the JNI libraries embedded in the APK is accessible
+from the namespace, thus preventing an APK from loading JNI libraries of other
+APKs.
+
+The linker namespace is also configured differently depending on other
+characteristics of the APK such as whether or not the APK is bundled with the
+platform. In case of the unbundled, i.e., downloaded or updated APK, only the
+public native libraries that is listed in `/system/etc/public.libraries.txt`
+are available from the platform, whereas in case of the bundled, all libraries
+under `/system/lib` are available (i.e. shared). In case when the unbundled
+app is from `/vendor` or `/product` partition, the app is additionally provided
+with the [VNDK-SP](https://source.android.com/devices/architecture/vndk#sp-hal)
+libraries. As the platform is getting modularized with
+[APEX](https://android.googlesource.com/platform/system/apex/+/refs/heads/master/docs/README.md),
+some libraries are no longer provided from platform, but from the APEXes which
+have their own linker namespaces. For example, ICU libraries `libicuuc.so` and
+`libicui18n.so` are from the runtime APEX.
+
+The list of public native libraries is not static. The default set of libraries
+are defined in AOSP, but partners can extend it to include their own libraries.
+Currently, following extensions are available:
+
+- `/vendor/etc/public.libraries.txt`: libraries in `/vendor/lib` that are
+specific to the underlying SoC, e.g. GPU, DSP, etc.
+- `/{system|product}/etc/public.libraries-<companyname>.txt`: libraries in
+`/{system|system}/lib` that a device manufacturer has newly added. The
+libraries should be named as `lib<name>.<companyname>.so` as in
+`libFoo.acme.so`.
+
+Note that, due to the naming constraint requiring `.<companyname>.so` suffix, it
+is prohibited for a device manufacturer to expose an AOSP-defined private
+library, e.g. libgui.so, libart.so, etc., to APKs.
+
+Lastly, libnativeloader is responsible for abstracting the two types of the
+dynamic linker interface: `libdl.so` and `libnativebridge.so`. The former is
+for non-translated, e.g. ARM-on-ARM, libraries, while the latter is for
+loading libraries in a translated environment such as ARM-on-x86.
+
+Implementation
+-------------------------------------------------------------------------------
+Implementation wise, libnativeloader consists of four parts:
+
+- `native_loader.cpp`
+- `library_namespaces.cpp`
+- `native_loader_namespace.cpp`
+- `public_libraries.cpp`
+
+`native_loader.cpp` implements the public interface of this library. It is just
+a thin wrapper around `library_namespaces.cpp` and `native_loader_namespace.cpp`.
+
+`library_namespaces.cpp` implements the singleton class `LibraryNamespaces` which
+is a manager-like entity that is responsible for creating and configuring
+linker namespaces and finding an already created linker namespace for a given
+classloader.
+
+`native_loader_namesapces.cpp` implements the class `NativeLoaderNamespace` that
+models a linker namespace. It's main job is to abstract the two types of the
+dynamic linker interface so that other parts of this library do not have to know
+the differences of the interfaces.
+
+`public_libraries.cpp` is responsible for reading `*.txt` files for the public
+native libraries from the various partitions. It can be considered as a part of
+`LibraryNamespaces` but is separated from it to hide the details of the parsing
+routines.
diff --git a/libnativeloader/library_namespaces.cpp b/libnativeloader/library_namespaces.cpp
index 3839a15..f7f972f 100644
--- a/libnativeloader/library_namespaces.cpp
+++ b/libnativeloader/library_namespaces.cpp
@@ -22,12 +22,13 @@
 #include <string>
 #include <vector>
 
-#include "android-base/file.h"
-#include "android-base/logging.h"
-#include "android-base/macros.h"
-#include "android-base/properties.h"
-#include "android-base/strings.h"
-#include "nativehelper/ScopedUtfChars.h"
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/macros.h>
+#include <android-base/properties.h>
+#include <android-base/strings.h>
+#include <nativehelper/ScopedUtfChars.h>
+
 #include "nativeloader/dlext_namespaces.h"
 #include "public_libraries.h"
 #include "utils.h"
@@ -41,8 +42,6 @@
 // vendor and system namespaces.
 constexpr const char* kVendorNamespaceName = "sphal";
 constexpr const char* kVndkNamespaceName = "vndk";
-constexpr const char* kDefaultNamespaceName = "default";
-constexpr const char* kPlatformNamespaceName = "platform";
 constexpr const char* kRuntimeNamespaceName = "runtime";
 
 // classloader-namespace is a linker namespace that is created for the loaded
@@ -167,34 +166,13 @@
 
   LOG_ALWAYS_FATAL_IF(found, "There is already a namespace associated with this classloader");
 
-  uint64_t namespace_type = ANDROID_NAMESPACE_TYPE_ISOLATED;
-  if (is_shared) {
-    namespace_type |= ANDROID_NAMESPACE_TYPE_SHARED;
-  }
-
-  if (target_sdk_version < 24) {
-    namespace_type |= ANDROID_NAMESPACE_TYPE_GREYLIST_ENABLED;
-  }
-
-  NativeLoaderNamespace* parent_ns = FindParentNamespaceByClassLoader(env, class_loader);
-
-  bool is_native_bridge = false;
-
-  if (parent_ns != nullptr) {
-    is_native_bridge = !parent_ns->is_android_namespace();
-  } else if (!library_path.empty()) {
-    is_native_bridge = NativeBridgeIsPathSupported(library_path.c_str());
-  }
-
   std::string system_exposed_libraries = default_public_libraries();
   const char* namespace_name = kClassloaderNamespaceName;
-  android_namespace_t* vndk_ns = nullptr;
+  bool unbundled_vendor_or_product_app = false;
   if ((apk_origin == APK_ORIGIN_VENDOR ||
        (apk_origin == APK_ORIGIN_PRODUCT && target_sdk_version > 29)) &&
       !is_shared) {
-    LOG_FATAL_IF(is_native_bridge,
-                 "Unbundled vendor / product apk must not use translated architecture");
-
+    unbundled_vendor_or_product_app = true;
     // For vendor / product apks, give access to the vendor / product lib even though
     // they are treated as unbundled; the libs and apks are still bundled
     // together in the vendor / product partition.
@@ -214,22 +192,12 @@
         origin_partition = "unknown";
         origin_lib_path = "";
     }
-
-    LOG_FATAL_IF(is_native_bridge, "Unbundled %s apk must not use translated architecture",
-                 origin_partition);
-
     library_path = library_path + ":" + origin_lib_path;
     permitted_path = permitted_path + ":" + origin_lib_path;
 
     // Also give access to LLNDK libraries since they are available to vendors
     system_exposed_libraries = system_exposed_libraries + ":" + llndk_libraries().c_str();
 
-    // Give access to VNDK-SP libraries from the 'vndk' namespace.
-    vndk_ns = android_get_exported_namespace(kVndkNamespaceName);
-    if (vndk_ns == nullptr) {
-      ALOGW("Cannot find \"%s\" namespace for %s apks", kVndkNamespaceName, origin_partition);
-    }
-
     // Different name is useful for debugging
     namespace_name = kVendorClassloaderNamespaceName;
     ALOGD("classloader namespace configured for unbundled %s apk. library_path=%s",
@@ -241,120 +209,56 @@
       system_exposed_libraries = system_exposed_libraries + ':' + extended_public_libraries();
     }
   }
-  std::string runtime_exposed_libraries = runtime_public_libraries();
 
-  NativeLoaderNamespace native_loader_ns;
-  if (!is_native_bridge) {
-    // The platform namespace is called "default" for binaries in /system and
-    // "platform" for those in the Runtime APEX. Try "platform" first since
-    // "default" always exists.
-    android_namespace_t* platform_ns = android_get_exported_namespace(kPlatformNamespaceName);
-    if (platform_ns == nullptr) {
-      platform_ns = android_get_exported_namespace(kDefaultNamespaceName);
-    }
-
-    android_namespace_t* android_parent_ns;
-    if (parent_ns != nullptr) {
-      android_parent_ns = parent_ns->get_android_ns();
-    } else {
-      // Fall back to the platform namespace if no parent is found.
-      android_parent_ns = platform_ns;
-    }
-
-    android_namespace_t* ns =
-        android_create_namespace(namespace_name, nullptr, library_path.c_str(), namespace_type,
-                                 permitted_path.c_str(), android_parent_ns);
-    if (ns == nullptr) {
-      *error_msg = dlerror();
-      return nullptr;
-    }
-
-    // Note that when vendor_ns is not configured this function will return nullptr
-    // and it will result in linking vendor_public_libraries_ to the default namespace
-    // which is expected behavior in this case.
-    android_namespace_t* vendor_ns = android_get_exported_namespace(kVendorNamespaceName);
-
-    android_namespace_t* runtime_ns = android_get_exported_namespace(kRuntimeNamespaceName);
-
-    if (!android_link_namespaces(ns, platform_ns, system_exposed_libraries.c_str())) {
-      *error_msg = dlerror();
-      return nullptr;
-    }
-
-    // Runtime apex does not exist in host, and under certain build conditions.
-    if (runtime_ns != nullptr) {
-      if (!android_link_namespaces(ns, runtime_ns, runtime_exposed_libraries.c_str())) {
-        *error_msg = dlerror();
-        return nullptr;
-      }
-    }
-
-    if (vndk_ns != nullptr && !vndksp_libraries().empty()) {
-      // vendor apks are allowed to use VNDK-SP libraries.
-      if (!android_link_namespaces(ns, vndk_ns, vndksp_libraries().c_str())) {
-        *error_msg = dlerror();
-        return nullptr;
-      }
-    }
-
-    if (!vendor_public_libraries().empty()) {
-      if (!android_link_namespaces(ns, vendor_ns, vendor_public_libraries().c_str())) {
-        *error_msg = dlerror();
-        return nullptr;
-      }
-    }
-
-    native_loader_ns = NativeLoaderNamespace(ns);
-  } else {
-    // Same functionality as in the branch above, but calling through native bridge.
-
-    native_bridge_namespace_t* platform_ns =
-        NativeBridgeGetExportedNamespace(kPlatformNamespaceName);
-    if (platform_ns == nullptr) {
-      platform_ns = NativeBridgeGetExportedNamespace(kDefaultNamespaceName);
-    }
-
-    native_bridge_namespace_t* native_bridge_parent_namespace;
-    if (parent_ns != nullptr) {
-      native_bridge_parent_namespace = parent_ns->get_native_bridge_ns();
-    } else {
-      native_bridge_parent_namespace = platform_ns;
-    }
-
-    native_bridge_namespace_t* ns =
-        NativeBridgeCreateNamespace(namespace_name, nullptr, library_path.c_str(), namespace_type,
-                                    permitted_path.c_str(), native_bridge_parent_namespace);
-    if (ns == nullptr) {
-      *error_msg = NativeBridgeGetError();
-      return nullptr;
-    }
-
-    native_bridge_namespace_t* vendor_ns = NativeBridgeGetExportedNamespace(kVendorNamespaceName);
-    native_bridge_namespace_t* runtime_ns = NativeBridgeGetExportedNamespace(kRuntimeNamespaceName);
-
-    if (!NativeBridgeLinkNamespaces(ns, platform_ns, system_exposed_libraries.c_str())) {
-      *error_msg = NativeBridgeGetError();
-      return nullptr;
-    }
-
-    // Runtime apex does not exist in host, and under certain build conditions.
-    if (runtime_ns != nullptr) {
-      if (!NativeBridgeLinkNamespaces(ns, runtime_ns, runtime_exposed_libraries.c_str())) {
-        *error_msg = NativeBridgeGetError();
-        return nullptr;
-      }
-    }
-    if (!vendor_public_libraries().empty()) {
-      if (!NativeBridgeLinkNamespaces(ns, vendor_ns, vendor_public_libraries().c_str())) {
-        *error_msg = NativeBridgeGetError();
-        return nullptr;
-      }
-    }
-
-    native_loader_ns = NativeLoaderNamespace(ns);
+  // Create the app namespace
+  NativeLoaderNamespace* parent_ns = FindParentNamespaceByClassLoader(env, class_loader);
+  auto app_ns =
+      NativeLoaderNamespace::Create(namespace_name, library_path, permitted_path, parent_ns,
+                                    is_shared, target_sdk_version < 24 /* is_greylist_enabled */);
+  if (app_ns.IsNil()) {
+    *error_msg = app_ns.GetError();
+    return nullptr;
   }
 
-  namespaces_.push_back(std::make_pair(env->NewWeakGlobalRef(class_loader), native_loader_ns));
+  // ... and link to other namespaces to allow access to some public libraries
+  bool is_bridged = app_ns.IsBridged();
+
+  auto platform_ns = NativeLoaderNamespace::GetPlatformNamespace(is_bridged);
+  if (!app_ns.Link(platform_ns, system_exposed_libraries)) {
+    *error_msg = app_ns.GetError();
+    return nullptr;
+  }
+
+  auto runtime_ns = NativeLoaderNamespace::GetExportedNamespace(kRuntimeNamespaceName, is_bridged);
+  // Runtime apex does not exist in host, and under certain build conditions.
+  if (!runtime_ns.IsNil()) {
+    if (!app_ns.Link(runtime_ns, runtime_public_libraries())) {
+      *error_msg = app_ns.GetError();
+      return nullptr;
+    }
+  }
+
+  // Give access to VNDK-SP libraries from the 'vndk' namespace.
+  if (unbundled_vendor_or_product_app && !vndksp_libraries().empty()) {
+    auto vndk_ns = NativeLoaderNamespace::GetExportedNamespace(kVndkNamespaceName, is_bridged);
+    if (!vndk_ns.IsNil() && !app_ns.Link(vndk_ns, vndksp_libraries())) {
+      *error_msg = app_ns.GetError();
+      return nullptr;
+    }
+  }
+
+  // Note that when vendor_ns is not configured, vendor_ns.IsNil() will be true
+  // and it will result in linking to the default namespace which is expected
+  // behavior in this case.
+  if (!vendor_public_libraries().empty()) {
+    auto vendor_ns = NativeLoaderNamespace::GetExportedNamespace(kVendorNamespaceName, is_bridged);
+    if (!app_ns.Link(vendor_ns, vendor_public_libraries())) {
+      *error_msg = dlerror();
+      return nullptr;
+    }
+  }
+
+  namespaces_.push_back(std::make_pair(env->NewWeakGlobalRef(class_loader), app_ns));
 
   return &(namespaces_.back().second);
 }
diff --git a/libnativeloader/library_namespaces.h b/libnativeloader/library_namespaces.h
index 103cfac..fd46cdc 100644
--- a/libnativeloader/library_namespaces.h
+++ b/libnativeloader/library_namespaces.h
@@ -25,8 +25,7 @@
 #include <list>
 #include <string>
 
-#include "jni.h"
-#include "utils.h"
+#include <jni.h>
 
 namespace android::nativeloader {
 
diff --git a/libnativeloader/native_loader.cpp b/libnativeloader/native_loader.cpp
index eeee077..0c29324 100644
--- a/libnativeloader/native_loader.cpp
+++ b/libnativeloader/native_loader.cpp
@@ -14,9 +14,10 @@
  * limitations under the License.
  */
 
-#include "nativeloader/native_loader.h"
 #define LOG_TAG "nativeloader"
 
+#include "nativeloader/native_loader.h"
+
 #include <dlfcn.h>
 #include <sys/types.h>
 
@@ -25,16 +26,17 @@
 #include <string>
 #include <vector>
 
-#include "android-base/file.h"
-#include "android-base/macros.h"
-#include "android-base/strings.h"
+#include <android-base/file.h>
+#include <android-base/macros.h>
+#include <android-base/strings.h>
+#include <nativebridge/native_bridge.h>
+#include <nativehelper/ScopedUtfChars.h>
+
 #ifdef __ANDROID__
+#include <log/log.h>
 #include "library_namespaces.h"
-#include "log/log.h"
 #include "nativeloader/dlext_namespaces.h"
 #endif
-#include "nativebridge/native_bridge.h"
-#include "nativehelper/ScopedUtfChars.h"
 
 namespace android {
 
@@ -220,25 +222,12 @@
 #if defined(__ANDROID__)
 void* OpenNativeLibraryInNamespace(NativeLoaderNamespace* ns, const char* path,
                                    bool* needs_native_bridge, char** error_msg) {
-  if (ns->is_android_namespace()) {
-    android_dlextinfo extinfo;
-    extinfo.flags = ANDROID_DLEXT_USE_NAMESPACE;
-    extinfo.library_namespace = ns->get_android_ns();
-
-    void* handle = android_dlopen_ext(path, RTLD_NOW, &extinfo);
-    if (handle == nullptr) {
-      *error_msg = strdup(dlerror());
-    }
-    *needs_native_bridge = false;
-    return handle;
-  } else {
-    void* handle = NativeBridgeLoadLibraryExt(path, RTLD_NOW, ns->get_native_bridge_ns());
-    if (handle == nullptr) {
-      *error_msg = strdup(NativeBridgeGetError());
-    }
-    *needs_native_bridge = true;
-    return handle;
+  void* handle = ns->Load(path);
+  if (handle == nullptr) {
+    *error_msg = ns->GetError();
   }
+  *needs_native_bridge = ns->IsBridged();
+  return handle;
 }
 
 // native_bridge_namespaces are not supported for callers of this function.
@@ -247,10 +236,9 @@
 android_namespace_t* FindNamespaceByClassLoader(JNIEnv* env, jobject class_loader) {
   std::lock_guard<std::mutex> guard(g_namespaces_mutex);
   NativeLoaderNamespace* ns = g_namespaces->FindNamespaceByClassLoader(env, class_loader);
-  if (ns != nullptr) {
-    return ns->is_android_namespace() ? ns->get_android_ns() : nullptr;
+  if (ns != nullptr && !ns->IsBridged()) {
+    return ns->ToRawAndroidNamespace();
   }
-
   return nullptr;
 }
 
diff --git a/libnativeloader/native_loader_namespace.cpp b/libnativeloader/native_loader_namespace.cpp
new file mode 100644
index 0000000..90f730c
--- /dev/null
+++ b/libnativeloader/native_loader_namespace.cpp
@@ -0,0 +1,130 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#define LOG_TAG "nativeloader"
+
+#include "native_loader_namespace.h"
+
+#include <dlfcn.h>
+
+#include <functional>
+
+#include <android-base/strings.h>
+#include <log/log.h>
+#include <nativebridge/native_bridge.h>
+
+#include "nativeloader/dlext_namespaces.h"
+
+namespace android {
+
+namespace {
+
+constexpr const char* kDefaultNamespaceName = "default";
+constexpr const char* kPlatformNamespaceName = "platform";
+
+}  // namespace
+
+NativeLoaderNamespace NativeLoaderNamespace::GetExportedNamespace(const std::string& name,
+                                                                  bool is_bridged) {
+  if (!is_bridged) {
+    return NativeLoaderNamespace(name, android_get_exported_namespace(name.c_str()));
+  } else {
+    return NativeLoaderNamespace(name, NativeBridgeGetExportedNamespace(name.c_str()));
+  }
+}
+
+char* NativeLoaderNamespace::GetError() const {
+  if (!IsBridged()) {
+    return strdup(dlerror());
+  } else {
+    return strdup(NativeBridgeGetError());
+  }
+}
+
+// The platform namespace is called "default" for binaries in /system and
+// "platform" for those in the Runtime APEX. Try "platform" first since
+// "default" always exists.
+NativeLoaderNamespace NativeLoaderNamespace::GetPlatformNamespace(bool is_bridged) {
+  NativeLoaderNamespace ns = GetExportedNamespace(kPlatformNamespaceName, is_bridged);
+  if (ns.IsNil()) {
+    ns = GetExportedNamespace(kDefaultNamespaceName, is_bridged);
+  }
+  return ns;
+}
+
+NativeLoaderNamespace NativeLoaderNamespace::Create(const std::string& name,
+                                                    const std::string& search_paths,
+                                                    const std::string& permitted_paths,
+                                                    const NativeLoaderNamespace* parent,
+                                                    bool is_shared, bool is_greylist_enabled) {
+  bool is_bridged = false;
+  if (parent != nullptr) {
+    is_bridged = parent->IsBridged();
+  } else if (!search_paths.empty()) {
+    is_bridged = NativeBridgeIsPathSupported(search_paths.c_str());
+  }
+
+  // Fall back to the platform namespace if no parent is set.
+  const NativeLoaderNamespace& effective_parent =
+      parent != nullptr ? *parent : GetPlatformNamespace(is_bridged);
+
+  uint64_t type = ANDROID_NAMESPACE_TYPE_ISOLATED;
+  if (is_shared) {
+    type |= ANDROID_NAMESPACE_TYPE_SHARED;
+  }
+  if (is_greylist_enabled) {
+    type |= ANDROID_NAMESPACE_TYPE_GREYLIST_ENABLED;
+  }
+
+  if (!is_bridged) {
+    android_namespace_t* raw =
+        android_create_namespace(name.c_str(), nullptr, search_paths.c_str(), type,
+                                 permitted_paths.c_str(), effective_parent.ToRawAndroidNamespace());
+    return NativeLoaderNamespace(name, raw);
+  } else {
+    native_bridge_namespace_t* raw = NativeBridgeCreateNamespace(
+        name.c_str(), nullptr, search_paths.c_str(), type, permitted_paths.c_str(),
+        effective_parent.ToRawNativeBridgeNamespace());
+    return NativeLoaderNamespace(name, raw);
+  }
+}
+
+bool NativeLoaderNamespace::Link(const NativeLoaderNamespace& target,
+                                 const std::string& shared_libs) const {
+  LOG_ALWAYS_FATAL_IF(shared_libs.empty(), "empty share lib when linking %s to %s",
+                      this->name().c_str(), target.name().c_str());
+  if (!IsBridged()) {
+    return android_link_namespaces(this->ToRawAndroidNamespace(), target.ToRawAndroidNamespace(),
+                                   shared_libs.c_str());
+  } else {
+    return NativeBridgeLinkNamespaces(this->ToRawNativeBridgeNamespace(),
+                                      target.ToRawNativeBridgeNamespace(), shared_libs.c_str());
+  }
+}
+
+void* NativeLoaderNamespace::Load(const std::string& lib_name) const {
+  if (!IsBridged()) {
+    android_dlextinfo extinfo;
+    extinfo.flags = ANDROID_DLEXT_USE_NAMESPACE;
+    extinfo.library_namespace = this->ToRawAndroidNamespace();
+    return android_dlopen_ext(lib_name.c_str(), RTLD_NOW, &extinfo);
+  } else {
+    return NativeBridgeLoadLibraryExt(lib_name.c_str(), RTLD_NOW,
+                                      this->ToRawNativeBridgeNamespace());
+  }
+}
+
+}  // namespace android
diff --git a/libnativeloader/native_loader_namespace.h b/libnativeloader/native_loader_namespace.h
index b983a2d..1575f8c 100644
--- a/libnativeloader/native_loader_namespace.h
+++ b/libnativeloader/native_loader_namespace.h
@@ -16,13 +16,14 @@
 #pragma once
 #if defined(__ANDROID__)
 
-#include <dlfcn.h>
+#include <string>
+#include <variant>
+#include <vector>
 
-#include "android-base/logging.h"
-#include "android/dlext.h"
-#include "log/log.h"
-#include "nativebridge/native_bridge.h"
-#include "utils.h"
+#include <android-base/logging.h>
+#include <android/dlext.h>
+#include <log/log.h>
+#include <nativebridge/native_bridge.h>
 
 namespace android {
 
@@ -31,34 +32,40 @@
 // x86). Instances of this class are managed by LibraryNamespaces object.
 struct NativeLoaderNamespace {
  public:
-  NativeLoaderNamespace() : android_ns_(nullptr), native_bridge_ns_(nullptr) {}
-
-  explicit NativeLoaderNamespace(android_namespace_t* ns)
-      : android_ns_(ns), native_bridge_ns_(nullptr) {}
-
-  explicit NativeLoaderNamespace(native_bridge_namespace_t* ns)
-      : android_ns_(nullptr), native_bridge_ns_(ns) {}
+  // TODO(return with errors)
+  static NativeLoaderNamespace Create(const std::string& name, const std::string& search_paths,
+                                      const std::string& permitted_paths,
+                                      const NativeLoaderNamespace* parent, bool is_shared,
+                                      bool is_greylist_enabled);
 
   NativeLoaderNamespace(NativeLoaderNamespace&&) = default;
   NativeLoaderNamespace(const NativeLoaderNamespace&) = default;
   NativeLoaderNamespace& operator=(const NativeLoaderNamespace&) = default;
 
-  android_namespace_t* get_android_ns() const {
-    CHECK(native_bridge_ns_ == nullptr);
-    return android_ns_;
+  android_namespace_t* ToRawAndroidNamespace() const { return std::get<0>(raw_); }
+  native_bridge_namespace_t* ToRawNativeBridgeNamespace() const { return std::get<1>(raw_); }
+
+  std::string name() const { return name_; }
+  bool IsBridged() const { return raw_.index() == 1; }
+  bool IsNil() const {
+    return IsBridged() ? std::get<1>(raw_) == nullptr : std::get<0>(raw_) == nullptr;
   }
 
-  native_bridge_namespace_t* get_native_bridge_ns() const {
-    CHECK(android_ns_ == nullptr);
-    return native_bridge_ns_;
-  }
+  bool Link(const NativeLoaderNamespace& target, const std::string& shared_libs) const;
+  void* Load(const std::string& lib_name) const;
+  char* GetError() const;
 
-  bool is_android_namespace() const { return native_bridge_ns_ == nullptr; }
+  static NativeLoaderNamespace GetExportedNamespace(const std::string& name, bool is_bridged);
+  static NativeLoaderNamespace GetPlatformNamespace(bool is_bridged);
 
  private:
-  // Only one of them can be not null
-  android_namespace_t* android_ns_;
-  native_bridge_namespace_t* native_bridge_ns_;
+  explicit NativeLoaderNamespace(const std::string& name, android_namespace_t* ns)
+      : name_(name), raw_(ns) {}
+  explicit NativeLoaderNamespace(const std::string& name, native_bridge_namespace_t* ns)
+      : name_(name), raw_(ns) {}
+
+  std::string name_;
+  std::variant<android_namespace_t*, native_bridge_namespace_t*> raw_;
 };
 
 }  // namespace android
diff --git a/libnativeloader/public_libraries.cpp b/libnativeloader/public_libraries.cpp
index 64fedae..c205eb1 100644
--- a/libnativeloader/public_libraries.cpp
+++ b/libnativeloader/public_libraries.cpp
@@ -14,19 +14,21 @@
  * limitations under the License.
  */
 
-#include "public_libraries.h"
 #define LOG_TAG "nativeloader"
 
+#include "public_libraries.h"
+
 #include <dirent.h>
 
 #include <algorithm>
 #include <memory>
 
-#include "android-base/file.h"
-#include "android-base/logging.h"
-#include "android-base/properties.h"
-#include "android-base/strings.h"
-#include "log/log.h"
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/properties.h>
+#include <android-base/strings.h>
+#include <log/log.h>
+
 #include "utils.h"
 
 namespace android::nativeloader {