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/*
* Copyright (C) 2015 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.
*/
#include "com_android_tools_aapt2_Aapt2Jni.h"
#include <algorithm>
#include <memory>
#include <utility>
#include <vector>
#include "android-base/logging.h"
#include "ScopedUtfChars.h"
#include "Diagnostics.h"
#include "util/Util.h"
using android::StringPiece;
namespace aapt {
extern int Compile(const std::vector<StringPiece>& args, IDiagnostics* iDiagnostics);
extern int Link(const std::vector<StringPiece>& args, IDiagnostics* iDiagnostics);
}
/*
* Converts a java List<String> into C++ vector<ScopedUtfChars>.
*/
static std::vector<ScopedUtfChars> list_to_utfchars(JNIEnv *env, jobject obj) {
std::vector<ScopedUtfChars> converted;
// Call size() method on the list to know how many elements there are.
jclass list_cls = env->GetObjectClass(obj);
jmethodID size_method_id = env->GetMethodID(list_cls, "size", "()I");
CHECK(size_method_id != 0);
jint size = env->CallIntMethod(obj, size_method_id);
CHECK(size >= 0);
// Now, iterate all strings in the list
// (note: generic erasure means get() return an Object)
jmethodID get_method_id = env->GetMethodID(list_cls, "get", "(I)Ljava/lang/Object;");
CHECK(get_method_id != 0);
for (jint i = 0; i < size; i++) {
// Call get(i) to get the string in the ith position.
jobject string_obj_uncast = env->CallObjectMethod(obj, get_method_id, i);
CHECK(string_obj_uncast != nullptr);
jstring string_obj = static_cast<jstring>(string_obj_uncast);
converted.push_back(ScopedUtfChars(env, string_obj));
}
return converted;
}
/*
* Extracts all StringPiece from the ScopedUtfChars instances.
*
* The returned pieces can only be used while the original ones have not been
* destroyed.
*/
static std::vector<StringPiece> extract_pieces(const std::vector<ScopedUtfChars> &strings) {
std::vector<StringPiece> pieces;
std::for_each(
strings.begin(), strings.end(),
[&pieces](const ScopedUtfChars &p) { pieces.push_back(p.c_str()); });
return pieces;
}
class JniDiagnostics : public aapt::IDiagnostics {
public:
JniDiagnostics(JNIEnv* env, jobject diagnostics_obj)
: env_(env), diagnostics_obj_(diagnostics_obj) {
mid_ = NULL;
}
void Log(Level level, aapt::DiagMessageActual& actual_msg) override {
jint level_value;
switch (level) {
case Level::Error:
level_value = 3;
break;
case Level::Warn:
level_value = 2;
break;
case Level::Note:
level_value = 1;
break;
}
jstring message = env_->NewStringUTF(actual_msg.message.c_str());
jstring path = env_->NewStringUTF(actual_msg.source.path.c_str());
jlong line = -1;
if (actual_msg.source.line) {
line = actual_msg.source.line.value();
}
if (!mid_) {
jclass diagnostics_cls = env_->GetObjectClass(diagnostics_obj_);
mid_ = env_->GetMethodID(diagnostics_cls, "log", "(ILjava/lang/String;JLjava/lang/String;)V");
}
env_->CallVoidMethod(diagnostics_obj_, mid_, level_value, path, line, message);
}
private:
JNIEnv* env_;
jobject diagnostics_obj_;
jmethodID mid_;
DISALLOW_COPY_AND_ASSIGN(JniDiagnostics);
};
JNIEXPORT jint JNICALL Java_com_android_tools_aapt2_Aapt2Jni_nativeCompile(
JNIEnv* env, jclass aapt_obj, jobject arguments_obj, jobject diagnostics_obj) {
std::vector<ScopedUtfChars> compile_args_jni =
list_to_utfchars(env, arguments_obj);
std::vector<StringPiece> compile_args = extract_pieces(compile_args_jni);
JniDiagnostics diagnostics(env, diagnostics_obj);
return aapt::Compile(compile_args, &diagnostics);
}
JNIEXPORT jint JNICALL Java_com_android_tools_aapt2_Aapt2Jni_nativeLink(JNIEnv* env,
jclass aapt_obj,
jobject arguments_obj,
jobject diagnostics_obj) {
std::vector<ScopedUtfChars> link_args_jni =
list_to_utfchars(env, arguments_obj);
std::vector<StringPiece> link_args = extract_pieces(link_args_jni);
JniDiagnostics diagnostics(env, diagnostics_obj);
return aapt::Link(link_args, &diagnostics);
}
JNIEXPORT void JNICALL Java_com_android_tools_aapt2_Aapt2Jni_ping(
JNIEnv *env, jclass aapt_obj) {
// This is just a dummy method to see if the library has been loaded.
}
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