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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_PAYMENTS_CONTENT_ANDROID_BYTE_BUFFER_HELPER_H_
#define COMPONENTS_PAYMENTS_CONTENT_ANDROID_BYTE_BUFFER_HELPER_H_
#include <jni.h>
#include <stdint.h>
#include <vector>
#include "base/android/jni_array.h"
#include "base/android/jni_bytebuffer.h"
#include "base/android/scoped_java_ref.h"
#include "base/check.h"
#include "mojo/public/cpp/bindings/struct_ptr.h"
namespace payments {
namespace android {
// Deserializes a java.nio.ByteBuffer into a native Mojo object. Returns true if
// deserialization is successful.
template <typename T>
bool DeserializeFromJavaByteBuffer(
JNIEnv* env,
const base::android::JavaRef<jobject>& jbuffer,
mojo::StructPtr<T>* out) {
DCHECK(out);
base::span<const uint8_t> native_buffer =
base::android::JavaByteBufferToSpan(env, jbuffer.obj());
return T::Deserialize(native_buffer.data(), native_buffer.size(), out);
}
// Deserializes a java.nio.ByteBuffer[] into a vector of native Mojo objects.
// The content of |out| is replaced. Returns true if all entries are
// deserialized successfully.
template <typename T>
bool DeserializeFromJavaByteBufferArray(
JNIEnv* env,
const base::android::JavaRef<jobjectArray>& jbuffers,
std::vector<mojo::StructPtr<T>>* out) {
DCHECK(out);
out->clear();
for (const auto& jbuffer : jbuffers.ReadElements<jobject>()) {
mojo::StructPtr<T> data;
if (!DeserializeFromJavaByteBuffer(env, jbuffer, &data)) {
out->clear();
return false;
}
out->push_back(std::move(data));
}
return true;
}
// Serializes a vector of native Mojo objects into a Java byte[][].
template <typename T>
base::android::ScopedJavaLocalRef<jobjectArray>
SerializeToJavaArrayOfByteArrays(JNIEnv* env,
const std::vector<mojo::StructPtr<T>>& input) {
std::vector<std::vector<uint8_t>> serialized_elements(input.size());
for (size_t i = 0; i < input.size(); i++) {
serialized_elements[i] = T::Serialize(&input[i]);
}
return base::android::ToJavaArrayOfByteArray(env, serialized_elements);
}
} // namespace android
} // namespace payments
#endif // COMPONENTS_PAYMENTS_CONTENT_ANDROID_BYTE_BUFFER_HELPER_H_
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