Hendrik/xgboost
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[jvm-packages] Implement new save_raw in jvm-packages. (#7570)

Browse Source 
* New `toByteArray` that accepts a parameter for format.
This commit is contained in:
Jiaming Yuan
2022-01-19 16:00:14 +08:00
committed by GitHub
parent b4ec1682c6
commit ac7a36367c
8 changed files with 56 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
jvm-packages/xgboost4j/src/native/xgboost4j.cpp
View File

@@ -662,20 +662,25 @@ JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBoosterLoadModel
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGBoosterGetModelRaw
* Signature: (J[[B)I
* Method: XGBoosterSaveModelToBuffer
* Signature: (JLjava/lang/String;[[B)I
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBoosterGetModelRaw
(JNIEnv * jenv, jclass jcls, jlong jhandle, jobjectArray jout) {
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBoosterSaveModelToBuffer
(JNIEnv * jenv, jclass jcls, jlong jhandle, jstring jformat, jobjectArray jout) {
BoosterHandle handle = (BoosterHandle) jhandle;
const char *format = jenv->GetStringUTFChars(jformat, 0);
bst_ulong len = 0;
const char* result;
int ret = XGBoosterGetModelRaw(handle, &len, &result);
JVM_CHECK_CALL(ret);
const char *result{nullptr};
xgboost::Json config {xgboost::Object{}};
config["format"] = std::string{format};
std::string config_str;
xgboost::Json::Dump(config, &config_str);
int ret = XGBoosterSaveModelToBuffer(handle, config_str.c_str(), &len, &result);
JVM_CHECK_CALL(ret);
if (result) {
jbyteArray jarray = jenv->NewByteArray(len);
jenv->SetByteArrayRegion(jarray, 0, len, (jbyte*)result);
jenv->SetByteArrayRegion(jarray, 0, len, (jbyte *)result);
jenv->SetObjectArrayElement(jout, 0, jarray);
}
return ret;