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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_ANDROID_JNI_ARRAY_H_
#define BASE_ANDROID_JNI_ARRAY_H_
#include <jni.h>
#include <stddef.h>
#include <stdint.h>
#include <ostream>
#include <string>
#include <vector>
#include "base/android/scoped_java_ref.h"
#include "base/check_op.h"
#include "base/containers/span.h"
namespace base::android {
// 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.
// Returns the length of Java array.
template <typename JavaArrayType>
BASE_EXPORT size_t SafeGetArrayLength(JNIEnv* env,
const JavaRef<JavaArrayType>& jarray) {
DCHECK(jarray);
jsize length = env->GetArrayLength(jarray.obj());
DCHECK_GE(length, 0) << "Invalid array length: " << length;
return static_cast<size_t>(std::max(0, length));
}
// Returns a new Java byte array converted from the given bytes array.
BASE_EXPORT ScopedJavaLocalRef<jbyteArray> ToJavaByteArray(JNIEnv* env,
const uint8_t* bytes,
size_t len);
BASE_EXPORT ScopedJavaLocalRef<jbyteArray> ToJavaByteArray(
JNIEnv* env,
base::span<const uint8_t> bytes);
// Returns a new Java byte array converted from the given string. No UTF-8
// conversion is performed.
BASE_EXPORT ScopedJavaLocalRef<jbyteArray> ToJavaByteArray(
JNIEnv* env,
const std::string& str);
// Returns a new Java boolean array converted from the given bool array.
BASE_EXPORT ScopedJavaLocalRef<jbooleanArray>
ToJavaBooleanArray(JNIEnv* env, const bool* bools, size_t len);
// Returns a new Java int array converted from the given int array.
BASE_EXPORT ScopedJavaLocalRef<jintArray> ToJavaIntArray(
JNIEnv* env, const int* ints, size_t len);
BASE_EXPORT ScopedJavaLocalRef<jintArray> ToJavaIntArray(
JNIEnv* env,
base::span<const int> ints);
// Returns a new Java long array converted from the given int64_t array.
BASE_EXPORT ScopedJavaLocalRef<jlongArray> ToJavaLongArray(JNIEnv* env,
const int64_t* longs,
size_t len);
BASE_EXPORT ScopedJavaLocalRef<jlongArray> ToJavaLongArray(
JNIEnv* env,
base::span<const int64_t> longs);
// 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);
BASE_EXPORT ScopedJavaLocalRef<jfloatArray> ToJavaFloatArray(
JNIEnv* env,
base::span<const float> floats);
// Returns a new Java double array converted from the given C++ double array.
BASE_EXPORT ScopedJavaLocalRef<jdoubleArray>
ToJavaDoubleArray(JNIEnv* env, const double* doubles, size_t len);
BASE_EXPORT ScopedJavaLocalRef<jdoubleArray> ToJavaDoubleArray(
JNIEnv* env,
base::span<const double> doubles);
// Returns a new clazz[] with the content of |v|.
BASE_EXPORT ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfObjects(
JNIEnv* env,
ScopedJavaLocalRef<jclass> clazz,
base::span<const ScopedJavaLocalRef<jobject>> v);
// Returns a new Object[] with the content of |v|.
BASE_EXPORT ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfObjects(
JNIEnv* env,
base::span<const ScopedJavaLocalRef<jobject>> v);
BASE_EXPORT ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfObjects(
JNIEnv* env,
base::span<const ScopedJavaGlobalRef<jobject>> v);
// Returns a new Type[] with the content of |v|.
BASE_EXPORT ScopedJavaLocalRef<jobjectArray> ToTypedJavaArrayOfObjects(
JNIEnv* env,
base::span<const ScopedJavaLocalRef<jobject>> v,
const JavaRef<jclass>& type);
BASE_EXPORT ScopedJavaLocalRef<jobjectArray> ToTypedJavaArrayOfObjects(
JNIEnv* env,
base::span<const ScopedJavaGlobalRef<jobject>> v,
const JavaRef<jclass>& type);
// Returns a array of Java byte array converted from |v|.
BASE_EXPORT ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfByteArray(
JNIEnv* env,
base::span<const std::string> v);
BASE_EXPORT ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfByteArray(
JNIEnv* env,
base::span<const std::vector<uint8_t>> v);
BASE_EXPORT ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfStrings(
JNIEnv* env,
base::span<const std::string> v);
BASE_EXPORT ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfStrings(
JNIEnv* env,
base::span<const std::u16string> v);
BASE_EXPORT ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfStringArray(
JNIEnv* env,
base::span<const std::vector<std::string>> v);
BASE_EXPORT ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfStringArray(
JNIEnv* env,
base::span<const std::vector<std::u16string>> v);
// Converts a Java string array to a native array.
BASE_EXPORT void AppendJavaStringArrayToStringVector(
JNIEnv* env,
const JavaRef<jobjectArray>& array,
std::vector<std::u16string>* out);
BASE_EXPORT void AppendJavaStringArrayToStringVector(
JNIEnv* env,
const JavaRef<jobjectArray>& array,
std::vector<std::string>* out);
// Appends the Java bytes in |bytes_array| onto the end of |out|.
BASE_EXPORT void AppendJavaByteArrayToByteVector(
JNIEnv* env,
const JavaRef<jbyteArray>& byte_array,
std::vector<uint8_t>* out);
// Replaces the content of |out| with the Java bytes in |byte_array|.
BASE_EXPORT void JavaByteArrayToByteVector(
JNIEnv* env,
const JavaRef<jbyteArray>& byte_array,
std::vector<uint8_t>* out);
// Copy the contents of java |byte_array| into |dest|. The span must be larger
// than or equal to the array.
// Returns the number of bytes copied.
BASE_EXPORT size_t
JavaByteArrayToByteSpan(JNIEnv* env,
const JavaRef<jbyteArray>& byte_array,
base::span<uint8_t> dest);
// Replaces the content of |out| with the Java bytes in |byte_array|. No UTF-8
// conversion is performed.
BASE_EXPORT void JavaByteArrayToString(JNIEnv* env,
const JavaRef<jbyteArray>& byte_array,
std::string* out);
// Replaces the content of |out| with the Java booleans in |boolean_array|.
BASE_EXPORT void JavaBooleanArrayToBoolVector(
JNIEnv* env,
const JavaRef<jbooleanArray>& boolean_array,
std::vector<bool>* out);
// Replaces the content of |out| with the Java ints in |int_array|.
BASE_EXPORT void JavaIntArrayToIntVector(JNIEnv* env,
const JavaRef<jintArray>& int_array,
std::vector<int>* out);
// Replaces the content of |out| with the Java longs in |long_array|.
BASE_EXPORT void JavaLongArrayToInt64Vector(
JNIEnv* env,
const JavaRef<jlongArray>& long_array,
std::vector<int64_t>* out);
// Replaces the content of |out| with the Java longs in |long_array|.
BASE_EXPORT void JavaLongArrayToLongVector(
JNIEnv* env,
const JavaRef<jlongArray>& long_array,
std::vector<jlong>* out);
// Replaces the content of |out| with the Java floats in |float_array|.
BASE_EXPORT void JavaFloatArrayToFloatVector(
JNIEnv* env,
const JavaRef<jfloatArray>& float_array,
std::vector<float>* out);
// Replaces the content of |out| with the Java doubles in |double_array|.
BASE_EXPORT void JavaDoubleArrayToDoubleVector(
JNIEnv* env,
const JavaRef<jdoubleArray>& double_array,
std::vector<double>* out);
// Assuming |array| is an byte[][] (array of byte arrays), replaces the
// content of |out| with the corresponding vector of strings. No UTF-8
// conversion is performed.
BASE_EXPORT void JavaArrayOfByteArrayToStringVector(
JNIEnv* env,
const JavaRef<jobjectArray>& array,
std::vector<std::string>* out);
// Assuming |array| is an byte[][] (array of byte arrays), replaces the
// content of |out| with the corresponding vector of vector of uint8. No UTF-8
// conversion is performed.
BASE_EXPORT void JavaArrayOfByteArrayToBytesVector(
JNIEnv* env,
const JavaRef<jobjectArray>& array,
std::vector<std::vector<uint8_t>>* out);
// Assuming |array| is an String[][] (array of String arrays), replaces the
// content of |out| with the corresponding vector of string vectors.
BASE_EXPORT void Java2dStringArrayTo2dStringVector(
JNIEnv* env,
const JavaRef<jobjectArray>& array,
std::vector<std::vector<std::string>>* out);
// Assuming |array| is an String[][] (array of String arrays), replaces the
// content of |out| with the corresponding vector of string vectors. No UTF-8
// conversion is performed.
BASE_EXPORT void Java2dStringArrayTo2dStringVector(
JNIEnv* env,
const JavaRef<jobjectArray>& array,
std::vector<std::vector<std::u16string>>* out);
// Assuming |array| is an int[][] (array of int arrays), replaces the
// contents of |out| with the corresponding vectors of ints.
BASE_EXPORT void JavaArrayOfIntArrayToIntVector(
JNIEnv* env,
const JavaRef<jobjectArray>& array,
std::vector<std::vector<int>>* out);
} // namespace base::android
#endif // BASE_ANDROID_JNI_ARRAY_H_
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