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// Copyright (c) 2012 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 "base/android/jni_array.h"
#include "base/android/jni_android.h"
#include "base/android/jni_string.h"
#include "base/logging.h"
namespace base {
namespace android {
namespace {
// As |GetArrayLength| makes no guarantees about the returned value (e.g., it
// may be -1 if |array| is not a valid Java array), provide a safe wrapper
// that always returns a valid, non-negative size.
template <typename JavaArrayType>
size_t SafeGetArrayLength(JNIEnv* env, JavaArrayType jarray) {
DCHECK(jarray);
jsize length = env->GetArrayLength(jarray);
DCHECK_GE(length, 0) << "Invalid array length: " << length;
return static_cast<size_t>(std::max(0, length));
}
} // namespace
ScopedJavaLocalRef<jbyteArray> ToJavaByteArray(JNIEnv* env,
const uint8_t* bytes,
size_t len) {
jbyteArray byte_array = env->NewByteArray(len);
CheckException(env);
DCHECK(byte_array);
env->SetByteArrayRegion(
byte_array, 0, len, reinterpret_cast<const jbyte*>(bytes));
CheckException(env);
return ScopedJavaLocalRef<jbyteArray>(env, byte_array);
}
ScopedJavaLocalRef<jbyteArray> ToJavaByteArray(
JNIEnv* env,
const std::vector<uint8_t>& bytes) {
return ToJavaByteArray(env, bytes.data(), bytes.size());
}
ScopedJavaLocalRef<jintArray> ToJavaIntArray(
JNIEnv* env, const int* ints, size_t len) {
jintArray int_array = env->NewIntArray(len);
CheckException(env);
DCHECK(int_array);
env->SetIntArrayRegion(
int_array, 0, len, reinterpret_cast<const jint*>(ints));
CheckException(env);
return ScopedJavaLocalRef<jintArray>(env, int_array);
}
ScopedJavaLocalRef<jintArray> ToJavaIntArray(
JNIEnv* env, const std::vector<int>& ints) {
return ToJavaIntArray(env, ints.data(), ints.size());
}
ScopedJavaLocalRef<jlongArray> ToJavaLongArray(JNIEnv* env,
const int64_t* longs,
size_t len) {
jlongArray long_array = env->NewLongArray(len);
CheckException(env);
DCHECK(long_array);
env->SetLongArrayRegion(
long_array, 0, len, reinterpret_cast<const jlong*>(longs));
CheckException(env);
return ScopedJavaLocalRef<jlongArray>(env, long_array);
}
// Returns a new Java long array converted from the given int64_t array.
BASE_EXPORT ScopedJavaLocalRef<jlongArray> ToJavaLongArray(
JNIEnv* env,
const std::vector<int64_t>& longs) {
return ToJavaLongArray(env, longs.data(), longs.size());
}
// Returns a new Java float array converted from the given C++ float array.
BASE_EXPORT ScopedJavaLocalRef<jfloatArray> ToJavaFloatArray(
JNIEnv* env, const float* floats, size_t len) {
jfloatArray float_array = env->NewFloatArray(len);
CheckException(env);
DCHECK(float_array);
env->SetFloatArrayRegion(
float_array, 0, len, reinterpret_cast<const jfloat*>(floats));
CheckException(env);
return ScopedJavaLocalRef<jfloatArray>(env, float_array);
}
BASE_EXPORT ScopedJavaLocalRef<jfloatArray> ToJavaFloatArray(
JNIEnv* env,
const std::vector<float>& floats) {
return ToJavaFloatArray(env, floats.data(), floats.size());
}
ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfByteArray(
JNIEnv* env, const std::vector<std::string>& v) {
ScopedJavaLocalRef<jclass> byte_array_clazz = GetClass(env, "[B");
jobjectArray joa = env->NewObjectArray(v.size(),
byte_array_clazz.obj(), NULL);
CheckException(env);
for (size_t i = 0; i < v.size(); ++i) {
ScopedJavaLocalRef<jbyteArray> byte_array = ToJavaByteArray(
env, reinterpret_cast<const uint8_t*>(v[i].data()), v[i].length());
env->SetObjectArrayElement(joa, i, byte_array.obj());
}
return ScopedJavaLocalRef<jobjectArray>(env, joa);
}
ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfStrings(
JNIEnv* env, const std::vector<std::string>& v) {
ScopedJavaLocalRef<jclass> string_clazz = GetClass(env, "java/lang/String");
jobjectArray joa = env->NewObjectArray(v.size(), string_clazz.obj(), NULL);
CheckException(env);
for (size_t i = 0; i < v.size(); ++i) {
ScopedJavaLocalRef<jstring> item = ConvertUTF8ToJavaString(env, v[i]);
env->SetObjectArrayElement(joa, i, item.obj());
}
return ScopedJavaLocalRef<jobjectArray>(env, joa);
}
ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfStrings(
JNIEnv* env, const std::vector<string16>& v) {
ScopedJavaLocalRef<jclass> string_clazz = GetClass(env, "java/lang/String");
jobjectArray joa = env->NewObjectArray(v.size(), string_clazz.obj(), NULL);
CheckException(env);
for (size_t i = 0; i < v.size(); ++i) {
ScopedJavaLocalRef<jstring> item = ConvertUTF16ToJavaString(env, v[i]);
env->SetObjectArrayElement(joa, i, item.obj());
}
return ScopedJavaLocalRef<jobjectArray>(env, joa);
}
void AppendJavaStringArrayToStringVector(JNIEnv* env,
jobjectArray array,
std::vector<string16>* out) {
DCHECK(out);
if (!array)
return;
size_t len = SafeGetArrayLength(env, array);
size_t back = out->size();
out->resize(back + len);
for (size_t i = 0; i < len; ++i) {
ScopedJavaLocalRef<jstring> str(env,
static_cast<jstring>(env->GetObjectArrayElement(array, i)));
ConvertJavaStringToUTF16(env, str.obj(), &((*out)[back + i]));
}
}
void AppendJavaStringArrayToStringVector(JNIEnv* env,
jobjectArray array,
std::vector<std::string>* out) {
DCHECK(out);
if (!array)
return;
size_t len = SafeGetArrayLength(env, array);
size_t back = out->size();
out->resize(back + len);
for (size_t i = 0; i < len; ++i) {
ScopedJavaLocalRef<jstring> str(env,
static_cast<jstring>(env->GetObjectArrayElement(array, i)));
ConvertJavaStringToUTF8(env, str.obj(), &((*out)[back + i]));
}
}
void AppendJavaByteArrayToByteVector(JNIEnv* env,
jbyteArray byte_array,
std::vector<uint8_t>* out) {
DCHECK(out);
if (!byte_array)
return;
size_t len = SafeGetArrayLength(env, byte_array);
if (!len)
return;
size_t back = out->size();
out->resize(back + len);
env->GetByteArrayRegion(byte_array, 0, len,
reinterpret_cast<int8_t*>(&(*out)[back]));
}
void JavaByteArrayToByteVector(JNIEnv* env,
jbyteArray byte_array,
std::vector<uint8_t>* out) {
DCHECK(out);
DCHECK(byte_array);
out->clear();
AppendJavaByteArrayToByteVector(env, byte_array, out);
}
void JavaIntArrayToIntVector(JNIEnv* env,
jintArray int_array,
std::vector<int>* out) {
DCHECK(out);
size_t len = SafeGetArrayLength(env, int_array);
out->resize(len);
if (!len)
return;
// TODO(jdduke): Use |out->data()| for pointer access after switch to libc++,
// both here and in the other conversion routines. See crbug.com/427718.
env->GetIntArrayRegion(int_array, 0, len, &(*out)[0]);
}
void JavaLongArrayToInt64Vector(JNIEnv* env,
jlongArray long_array,
std::vector<int64_t>* out) {
DCHECK(out);
std::vector<jlong> temp;
JavaLongArrayToLongVector(env, long_array, &temp);
out->resize(0);
out->insert(out->begin(), temp.begin(), temp.end());
}
void JavaLongArrayToLongVector(JNIEnv* env,
jlongArray long_array,
std::vector<jlong>* out) {
DCHECK(out);
size_t len = SafeGetArrayLength(env, long_array);
out->resize(len);
if (!len)
return;
env->GetLongArrayRegion(long_array, 0, len, &(*out)[0]);
}
void JavaFloatArrayToFloatVector(JNIEnv* env,
jfloatArray float_array,
std::vector<float>* out) {
DCHECK(out);
size_t len = SafeGetArrayLength(env, float_array);
out->resize(len);
if (!len)
return;
env->GetFloatArrayRegion(float_array, 0, len, &(*out)[0]);
}
void JavaArrayOfByteArrayToStringVector(
JNIEnv* env,
jobjectArray array,
std::vector<std::string>* out) {
DCHECK(out);
size_t len = SafeGetArrayLength(env, array);
out->resize(len);
for (size_t i = 0; i < len; ++i) {
ScopedJavaLocalRef<jbyteArray> bytes_array(
env, static_cast<jbyteArray>(
env->GetObjectArrayElement(array, i)));
jsize bytes_len = env->GetArrayLength(bytes_array.obj());
jbyte* bytes = env->GetByteArrayElements(bytes_array.obj(), nullptr);
(*out)[i].assign(reinterpret_cast<const char*>(bytes), bytes_len);
env->ReleaseByteArrayElements(bytes_array.obj(), bytes, JNI_ABORT);
}
}
void JavaArrayOfIntArrayToIntVector(
JNIEnv* env,
jobjectArray array,
std::vector<std::vector<int>>* out) {
DCHECK(out);
size_t len = SafeGetArrayLength(env, array);
out->resize(len);
for (size_t i = 0; i < len; ++i) {
ScopedJavaLocalRef<jintArray> int_array(
env, static_cast<jintArray>(env->GetObjectArrayElement(array, i)));
JavaIntArrayToIntVector(env, int_array.obj(), &((*out)[i]));
}
}
} // namespace android
} // namespace base
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