device/usb/usb_configuration_android.cc

// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "device/usb/usb_configuration_android.h"

#include "device/usb/usb_interface_android.h"
#include "jni/ChromeUsbConfiguration_jni.h"

using base::android::ScopedJavaLocalRef;

namespace device {

// static
bool UsbConfigurationAndroid::RegisterJNI(JNIEnv* env) {
  return RegisterNativesImpl(env);  // Generated in ChromeUsbConfiguration_jni.h
}

// static
UsbConfigDescriptor UsbConfigurationAndroid::Convert(
    JNIEnv* env,
    const base::android::JavaRef<jobject>& usb_configuration) {
  ScopedJavaLocalRef<jobject> wrapper =
      Java_ChromeUsbConfiguration_create(env, usb_configuration.obj());

  UsbConfigDescriptor config(
      Java_ChromeUsbConfiguration_getConfigurationValue(env, wrapper.obj()),
      Java_ChromeUsbConfiguration_isSelfPowered(env, wrapper.obj()),
      Java_ChromeUsbConfiguration_isRemoteWakeup(env, wrapper.obj()),
      Java_ChromeUsbConfiguration_getMaxPower(env, wrapper.obj()));

  ScopedJavaLocalRef<jobjectArray> interfaces =
      Java_ChromeUsbConfiguration_getInterfaces(env, wrapper.obj());
  jsize count = env->GetArrayLength(interfaces.obj());
  config.interfaces.reserve(count);
  for (jsize i = 0; i < count; ++i) {
    ScopedJavaLocalRef<jobject> interface(
        env, env->GetObjectArrayElement(interfaces.obj(), i));
    config.interfaces.push_back(UsbInterfaceAndroid::Convert(env, interface));
  }

  return config;
}

}  // namespace device