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JNIKiwixReader ctor taking a file descriptor

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... and a corresponding unit test
This commit is contained in:
Veloman Yunkan
2020-11-29 23:38:34 +04:00
committed by Emmanuel Engelhart
parent 98d69ef59b
commit 4d23e44de7
5 changed files with 69 additions and 1 deletions
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29
src/wrapper/java/kiwixreader.cpp
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@@ -45,6 +45,35 @@ JNIEXPORT jlong JNICALL Java_org_kiwix_kiwixlib_JNIKiwixReader_getNativeReader(
}
}
namespace
{
int jni2fd(const jobject& fdObj, JNIEnv* env)
{
jclass class_fdesc = env->FindClass("java/io/FileDescriptor");
jfieldID field_fd = env->GetFieldID(class_fdesc, "fd", "I");
return env->GetIntField(fdObj, field_fd);
}
} // unnamed namespace
JNIEXPORT jlong JNICALL Java_org_kiwix_kiwixlib_JNIKiwixReader_getNativeReaderByFD(
JNIEnv* env, jobject obj, jobject fdObj)
{
int fd = jni2fd(fdObj, env);
LOG("Attempting to create reader with fd: %d", fd);
Lock l;
try {
kiwix::Reader* reader = new kiwix::Reader(fd);
return reinterpret_cast<jlong>(new Handle<kiwix::Reader>(reader));
} catch (std::exception& e) {
LOG("Error opening ZIM file");
LOG(e.what());
return 0;
}
}
JNIEXPORT void JNICALL
Java_org_kiwix_kiwixlib_JNIKiwixReader_dispose(JNIEnv* env, jobject obj)
{