-
-
Notifications
You must be signed in to change notification settings - Fork 8.7k
/
xgboost4j.cpp
758 lines (695 loc) · 26.3 KB
/
xgboost4j.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
/*
Copyright (c) 2014 by Contributors
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 <cstdint>
#include <xgboost/c_api.h>
#include <xgboost/base.h>
#include <xgboost/logging.h>
#include "./xgboost4j.h"
#include <cstring>
#include <vector>
#include <string>
// helper functions
// set handle
void setHandle(JNIEnv *jenv, jlongArray jhandle, void* handle) {
#ifdef __APPLE__
long out = (long) handle;
#else
int64_t out = (int64_t) handle;
#endif
jenv->SetLongArrayRegion(jhandle, 0, 1, &out);
}
// global JVM
static JavaVM* global_jvm = nullptr;
// overrides JNI on load
jint JNI_OnLoad(JavaVM *vm, void *reserved) {
global_jvm = vm;
return JNI_VERSION_1_6;
}
XGB_EXTERN_C int XGBoost4jCallbackDataIterNext(
DataIterHandle data_handle,
XGBCallbackSetData* set_function,
DataHolderHandle set_function_handle) {
jobject jiter = static_cast<jobject>(data_handle);
JNIEnv* jenv;
int jni_status = global_jvm->GetEnv((void **)&jenv, JNI_VERSION_1_6);
if (jni_status == JNI_EDETACHED) {
global_jvm->AttachCurrentThread(reinterpret_cast<void **>(&jenv), nullptr);
} else {
CHECK(jni_status == JNI_OK);
}
try {
jclass iterClass = jenv->FindClass("java/util/Iterator");
jmethodID hasNext = jenv->GetMethodID(iterClass,
"hasNext", "()Z");
jmethodID next = jenv->GetMethodID(iterClass,
"next", "()Ljava/lang/Object;");
int ret_value;
if (jenv->CallBooleanMethod(jiter, hasNext)) {
ret_value = 1;
jobject batch = jenv->CallObjectMethod(jiter, next);
jclass batchClass = jenv->GetObjectClass(batch);
jlongArray joffset = (jlongArray)jenv->GetObjectField(
batch, jenv->GetFieldID(batchClass, "rowOffset", "[J"));
jfloatArray jlabel = (jfloatArray)jenv->GetObjectField(
batch, jenv->GetFieldID(batchClass, "label", "[F"));
jfloatArray jweight = (jfloatArray)jenv->GetObjectField(
batch, jenv->GetFieldID(batchClass, "weight", "[F"));
jintArray jindex = (jintArray)jenv->GetObjectField(
batch, jenv->GetFieldID(batchClass, "featureIndex", "[I"));
jfloatArray jvalue = (jfloatArray)jenv->GetObjectField(
batch, jenv->GetFieldID(batchClass, "featureValue", "[F"));
XGBoostBatchCSR cbatch;
cbatch.size = jenv->GetArrayLength(joffset) - 1;
cbatch.offset = jenv->GetLongArrayElements(joffset, 0);
if (jlabel != nullptr) {
cbatch.label = jenv->GetFloatArrayElements(jlabel, 0);
CHECK_EQ(jenv->GetArrayLength(jlabel), static_cast<long>(cbatch.size))
<< "batch.label.length must equal batch.numRows()";
} else {
cbatch.label = nullptr;
}
if (jweight != nullptr) {
cbatch.weight = jenv->GetFloatArrayElements(jweight, 0);
CHECK_EQ(jenv->GetArrayLength(jweight), static_cast<long>(cbatch.size))
<< "batch.weight.length must equal batch.numRows()";
} else {
cbatch.weight = nullptr;
}
long max_elem = cbatch.offset[cbatch.size];
cbatch.index = (int*) jenv->GetIntArrayElements(jindex, 0);
cbatch.value = jenv->GetFloatArrayElements(jvalue, 0);
CHECK_EQ(jenv->GetArrayLength(jindex), max_elem)
<< "batch.index.length must equal batch.offset.back()";
CHECK_EQ(jenv->GetArrayLength(jvalue), max_elem)
<< "batch.index.length must equal batch.offset.back()";
// cbatch is ready
CHECK_EQ((*set_function)(set_function_handle, cbatch), 0)
<< XGBGetLastError();
// release the elements.
jenv->ReleaseLongArrayElements(joffset, cbatch.offset, 0);
jenv->DeleteLocalRef(joffset);
if (jlabel != nullptr) {
jenv->ReleaseFloatArrayElements(jlabel, cbatch.label, 0);
jenv->DeleteLocalRef(jlabel);
}
if (jweight != nullptr) {
jenv->ReleaseFloatArrayElements(jweight, cbatch.weight, 0);
jenv->DeleteLocalRef(jweight);
}
jenv->ReleaseIntArrayElements(jindex, (jint*) cbatch.index, 0);
jenv->DeleteLocalRef(jindex);
jenv->ReleaseFloatArrayElements(jvalue, cbatch.value, 0);
jenv->DeleteLocalRef(jvalue);
jenv->DeleteLocalRef(batch);
jenv->DeleteLocalRef(batchClass);
ret_value = 1;
} else {
ret_value = 0;
}
jenv->DeleteLocalRef(iterClass);
// only detach if it is a async call.
if (jni_status == JNI_EDETACHED) {
global_jvm->DetachCurrentThread();
}
return ret_value;
} catch(dmlc::Error e) {
// only detach if it is a async call.
if (jni_status == JNI_EDETACHED) {
global_jvm->DetachCurrentThread();
}
LOG(FATAL) << e.what();
return -1;
}
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGBGetLastError
* Signature: ()Ljava/lang/String;
*/
JNIEXPORT jstring JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBGetLastError
(JNIEnv *jenv, jclass jcls) {
jstring jresult = 0;
const char* result = XGBGetLastError();
if (result != NULL) {
jresult = jenv->NewStringUTF(result);
}
return jresult;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGDMatrixCreateFromDataIter
* Signature: (Ljava/util/Iterator;Ljava/lang/String;[J)I
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGDMatrixCreateFromDataIter
(JNIEnv *jenv, jclass jcls, jobject jiter, jstring jcache_info, jlongArray jout) {
DMatrixHandle result;
const char* cache_info = nullptr;
if (jcache_info != nullptr) {
cache_info = jenv->GetStringUTFChars(jcache_info, 0);
}
int ret = XGDMatrixCreateFromDataIter(
jiter, XGBoost4jCallbackDataIterNext, cache_info, &result);
if (cache_info) {
jenv->ReleaseStringUTFChars(jcache_info, cache_info);
}
setHandle(jenv, jout, result);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGDMatrixCreateFromFile
* Signature: (Ljava/lang/String;I[J)I
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGDMatrixCreateFromFile
(JNIEnv *jenv, jclass jcls, jstring jfname, jint jsilent, jlongArray jout) {
DMatrixHandle result;
const char* fname = jenv->GetStringUTFChars(jfname, 0);
int ret = XGDMatrixCreateFromFile(fname, jsilent, &result);
if (fname) {
jenv->ReleaseStringUTFChars(jfname, fname);
}
setHandle(jenv, jout, result);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGDMatrixCreateFromCSREx
* Signature: ([J[J[F)J
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGDMatrixCreateFromCSREx
(JNIEnv *jenv, jclass jcls, jlongArray jindptr, jintArray jindices, jfloatArray jdata, jint jcol, jlongArray jout) {
DMatrixHandle result;
jlong* indptr = jenv->GetLongArrayElements(jindptr, 0);
jint* indices = jenv->GetIntArrayElements(jindices, 0);
jfloat* data = jenv->GetFloatArrayElements(jdata, 0);
bst_ulong nindptr = (bst_ulong)jenv->GetArrayLength(jindptr);
bst_ulong nelem = (bst_ulong)jenv->GetArrayLength(jdata);
jint ret = (jint) XGDMatrixCreateFromCSREx((size_t const *)indptr, (unsigned int const *)indices, (float const *)data, nindptr, nelem, jcol, &result);
setHandle(jenv, jout, result);
//Release
jenv->ReleaseLongArrayElements(jindptr, indptr, 0);
jenv->ReleaseIntArrayElements(jindices, indices, 0);
jenv->ReleaseFloatArrayElements(jdata, data, 0);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGDMatrixCreateFromCSCEx
* Signature: ([J[J[F)J
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGDMatrixCreateFromCSCEx
(JNIEnv *jenv, jclass jcls, jlongArray jindptr, jintArray jindices, jfloatArray jdata, jint jrow, jlongArray jout) {
DMatrixHandle result;
jlong* indptr = jenv->GetLongArrayElements(jindptr, NULL);
jint* indices = jenv->GetIntArrayElements(jindices, 0);
jfloat* data = jenv->GetFloatArrayElements(jdata, NULL);
bst_ulong nindptr = (bst_ulong)jenv->GetArrayLength(jindptr);
bst_ulong nelem = (bst_ulong)jenv->GetArrayLength(jdata);
jint ret = (jint) XGDMatrixCreateFromCSCEx((size_t const *)indptr, (unsigned int const *)indices, (float const *)data, nindptr, nelem, jrow, &result);
setHandle(jenv, jout, result);
//release
jenv->ReleaseLongArrayElements(jindptr, indptr, 0);
jenv->ReleaseIntArrayElements(jindices, indices, 0);
jenv->ReleaseFloatArrayElements(jdata, data, 0);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGDMatrixCreateFromMat
* Signature: ([FIIF)J
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGDMatrixCreateFromMat
(JNIEnv *jenv, jclass jcls, jfloatArray jdata, jint jnrow, jint jncol, jfloat jmiss, jlongArray jout) {
DMatrixHandle result;
jfloat* data = jenv->GetFloatArrayElements(jdata, 0);
bst_ulong nrow = (bst_ulong)jnrow;
bst_ulong ncol = (bst_ulong)jncol;
jint ret = (jint) XGDMatrixCreateFromMat((float const *)data, nrow, ncol, jmiss, &result);
setHandle(jenv, jout, result);
//release
jenv->ReleaseFloatArrayElements(jdata, data, 0);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGDMatrixSliceDMatrix
* Signature: (J[I)J
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGDMatrixSliceDMatrix
(JNIEnv *jenv, jclass jcls, jlong jhandle, jintArray jindexset, jlongArray jout) {
DMatrixHandle result;
DMatrixHandle handle = (DMatrixHandle) jhandle;
jint* indexset = jenv->GetIntArrayElements(jindexset, 0);
bst_ulong len = (bst_ulong)jenv->GetArrayLength(jindexset);
jint ret = (jint) XGDMatrixSliceDMatrix(handle, (int const *)indexset, len, &result);
setHandle(jenv, jout, result);
//release
jenv->ReleaseIntArrayElements(jindexset, indexset, 0);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGDMatrixFree
* Signature: (J)V
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGDMatrixFree
(JNIEnv *jenv, jclass jcls, jlong jhandle) {
DMatrixHandle handle = (DMatrixHandle) jhandle;
int ret = XGDMatrixFree(handle);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGDMatrixSaveBinary
* Signature: (JLjava/lang/String;I)V
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGDMatrixSaveBinary
(JNIEnv *jenv, jclass jcls, jlong jhandle, jstring jfname, jint jsilent) {
DMatrixHandle handle = (DMatrixHandle) jhandle;
const char* fname = jenv->GetStringUTFChars(jfname, 0);
int ret = XGDMatrixSaveBinary(handle, fname, jsilent);
if (fname) jenv->ReleaseStringUTFChars(jfname, (const char *)fname);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGDMatrixSetFloatInfo
* Signature: (JLjava/lang/String;[F)V
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGDMatrixSetFloatInfo
(JNIEnv *jenv, jclass jcls, jlong jhandle, jstring jfield, jfloatArray jarray) {
DMatrixHandle handle = (DMatrixHandle) jhandle;
const char* field = jenv->GetStringUTFChars(jfield, 0);
jfloat* array = jenv->GetFloatArrayElements(jarray, NULL);
bst_ulong len = (bst_ulong)jenv->GetArrayLength(jarray);
int ret = XGDMatrixSetFloatInfo(handle, field, (float const *)array, len);
//release
if (field) jenv->ReleaseStringUTFChars(jfield, field);
jenv->ReleaseFloatArrayElements(jarray, array, 0);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGDMatrixSetUIntInfo
* Signature: (JLjava/lang/String;[I)V
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGDMatrixSetUIntInfo
(JNIEnv *jenv, jclass jcls, jlong jhandle, jstring jfield, jintArray jarray) {
DMatrixHandle handle = (DMatrixHandle) jhandle;
const char* field = jenv->GetStringUTFChars(jfield, 0);
jint* array = jenv->GetIntArrayElements(jarray, NULL);
bst_ulong len = (bst_ulong)jenv->GetArrayLength(jarray);
int ret = XGDMatrixSetUIntInfo(handle, (char const *)field, (unsigned int const *)array, len);
//release
if (field) jenv->ReleaseStringUTFChars(jfield, (const char *)field);
jenv->ReleaseIntArrayElements(jarray, array, 0);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGDMatrixSetGroup
* Signature: (J[I)V
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGDMatrixSetGroup
(JNIEnv * jenv, jclass jcls, jlong jhandle, jintArray jarray) {
DMatrixHandle handle = (DMatrixHandle) jhandle;
jint* array = jenv->GetIntArrayElements(jarray, NULL);
bst_ulong len = (bst_ulong)jenv->GetArrayLength(jarray);
int ret = XGDMatrixSetGroup(handle, (unsigned int const *)array, len);
//release
jenv->ReleaseIntArrayElements(jarray, array, 0);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGDMatrixGetFloatInfo
* Signature: (JLjava/lang/String;)[F
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGDMatrixGetFloatInfo
(JNIEnv *jenv, jclass jcls, jlong jhandle, jstring jfield, jobjectArray jout) {
DMatrixHandle handle = (DMatrixHandle) jhandle;
const char* field = jenv->GetStringUTFChars(jfield, 0);
bst_ulong len;
float *result;
int ret = XGDMatrixGetFloatInfo(handle, field, &len, (const float**) &result);
if (field) jenv->ReleaseStringUTFChars(jfield, field);
jsize jlen = (jsize) len;
jfloatArray jarray = jenv->NewFloatArray(jlen);
jenv->SetFloatArrayRegion(jarray, 0, jlen, (jfloat *) result);
jenv->SetObjectArrayElement(jout, 0, (jobject) jarray);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGDMatrixGetUIntInfo
* Signature: (JLjava/lang/String;)[I
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGDMatrixGetUIntInfo
(JNIEnv *jenv, jclass jcls, jlong jhandle, jstring jfield, jobjectArray jout) {
DMatrixHandle handle = (DMatrixHandle) jhandle;
const char* field = jenv->GetStringUTFChars(jfield, 0);
bst_ulong len;
unsigned int *result;
int ret = (jint) XGDMatrixGetUIntInfo(handle, field, &len, (const unsigned int **) &result);
if (field) jenv->ReleaseStringUTFChars(jfield, field);
jsize jlen = (jsize) len;
jintArray jarray = jenv->NewIntArray(jlen);
jenv->SetIntArrayRegion(jarray, 0, jlen, (jint *) result);
jenv->SetObjectArrayElement(jout, 0, jarray);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGDMatrixNumRow
* Signature: (J)J
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGDMatrixNumRow
(JNIEnv *jenv, jclass jcls, jlong jhandle, jlongArray jout) {
DMatrixHandle handle = (DMatrixHandle) jhandle;
bst_ulong result[1];
int ret = (jint) XGDMatrixNumRow(handle, result);
jenv->SetLongArrayRegion(jout, 0, 1, (const jlong *) result);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGBoosterCreate
* Signature: ([J)J
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBoosterCreate
(JNIEnv *jenv, jclass jcls, jlongArray jhandles, jlongArray jout) {
std::vector<DMatrixHandle> handles;
if (jhandles != nullptr) {
size_t len = jenv->GetArrayLength(jhandles);
jlong *cjhandles = jenv->GetLongArrayElements(jhandles, 0);
for (size_t i = 0; i < len; ++i) {
handles.push_back((DMatrixHandle) cjhandles[i]);
}
jenv->ReleaseLongArrayElements(jhandles, cjhandles, 0);
}
BoosterHandle result;
int ret = XGBoosterCreate(dmlc::BeginPtr(handles), handles.size(), &result);
setHandle(jenv, jout, result);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGBoosterFree
* Signature: (J)V
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBoosterFree
(JNIEnv *jenv, jclass jcls, jlong jhandle) {
BoosterHandle handle = (BoosterHandle) jhandle;
return XGBoosterFree(handle);
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGBoosterSetParam
* Signature: (JLjava/lang/String;Ljava/lang/String;)V
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBoosterSetParam
(JNIEnv *jenv, jclass jcls, jlong jhandle, jstring jname, jstring jvalue) {
BoosterHandle handle = (BoosterHandle) jhandle;
const char* name = jenv->GetStringUTFChars(jname, 0);
const char* value = jenv->GetStringUTFChars(jvalue, 0);
int ret = XGBoosterSetParam(handle, name, value);
//release
if (name) jenv->ReleaseStringUTFChars(jname, name);
if (value) jenv->ReleaseStringUTFChars(jvalue, value);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGBoosterUpdateOneIter
* Signature: (JIJ)V
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBoosterUpdateOneIter
(JNIEnv *jenv, jclass jcls, jlong jhandle, jint jiter, jlong jdtrain) {
BoosterHandle handle = (BoosterHandle) jhandle;
DMatrixHandle dtrain = (DMatrixHandle) jdtrain;
return XGBoosterUpdateOneIter(handle, jiter, dtrain);
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGBoosterBoostOneIter
* Signature: (JJ[F[F)V
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBoosterBoostOneIter
(JNIEnv *jenv, jclass jcls, jlong jhandle, jlong jdtrain, jfloatArray jgrad, jfloatArray jhess) {
BoosterHandle handle = (BoosterHandle) jhandle;
DMatrixHandle dtrain = (DMatrixHandle) jdtrain;
jfloat* grad = jenv->GetFloatArrayElements(jgrad, 0);
jfloat* hess = jenv->GetFloatArrayElements(jhess, 0);
bst_ulong len = (bst_ulong)jenv->GetArrayLength(jgrad);
int ret = XGBoosterBoostOneIter(handle, dtrain, grad, hess, len);
//release
jenv->ReleaseFloatArrayElements(jgrad, grad, 0);
jenv->ReleaseFloatArrayElements(jhess, hess, 0);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGBoosterEvalOneIter
* Signature: (JI[J[Ljava/lang/String;)Ljava/lang/String;
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBoosterEvalOneIter
(JNIEnv *jenv, jclass jcls, jlong jhandle, jint jiter, jlongArray jdmats, jobjectArray jevnames, jobjectArray jout) {
BoosterHandle handle = (BoosterHandle) jhandle;
std::vector<DMatrixHandle> dmats;
std::vector<std::string> evnames;
std::vector<const char*> evchars;
size_t len = static_cast<size_t>(jenv->GetArrayLength(jdmats));
// put handle from jhandles to chandles
jlong* cjdmats = jenv->GetLongArrayElements(jdmats, 0);
for (size_t i = 0; i < len; ++i) {
dmats.push_back((DMatrixHandle) cjdmats[i]);
jstring jevname = (jstring)jenv->GetObjectArrayElement(jevnames, i);
const char *s =jenv->GetStringUTFChars(jevname, 0);
evnames.push_back(std::string(s, jenv->GetStringLength(jevname)));
if (s != nullptr) jenv->ReleaseStringUTFChars(jevname, s);
}
jenv->ReleaseLongArrayElements(jdmats, cjdmats, 0);
for (size_t i = 0; i < len; ++i) {
evchars.push_back(evnames[i].c_str());
}
const char* result;
int ret = XGBoosterEvalOneIter(handle, jiter,
dmlc::BeginPtr(dmats),
dmlc::BeginPtr(evchars),
len, &result);
jstring jinfo = nullptr;
if (result != nullptr) {
jinfo = jenv->NewStringUTF(result);
}
jenv->SetObjectArrayElement(jout, 0, jinfo);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGBoosterPredict
* Signature: (JJIJ)[F
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBoosterPredict
(JNIEnv *jenv, jclass jcls, jlong jhandle, jlong jdmat, jint joption_mask, jint jntree_limit, jobjectArray jout) {
BoosterHandle handle = (BoosterHandle) jhandle;
DMatrixHandle dmat = (DMatrixHandle) jdmat;
bst_ulong len;
float *result;
int ret = XGBoosterPredict(handle, dmat, joption_mask, (unsigned int) jntree_limit, &len, (const float **) &result);
jsize jlen = (jsize) len;
jfloatArray jarray = jenv->NewFloatArray(jlen);
jenv->SetFloatArrayRegion(jarray, 0, jlen, (jfloat *) result);
jenv->SetObjectArrayElement(jout, 0, jarray);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGBoosterLoadModel
* Signature: (JLjava/lang/String;)V
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBoosterLoadModel
(JNIEnv *jenv, jclass jcls, jlong jhandle, jstring jfname) {
BoosterHandle handle = (BoosterHandle) jhandle;
const char* fname = jenv->GetStringUTFChars(jfname, 0);
int ret = XGBoosterLoadModel(handle, fname);
if (fname) jenv->ReleaseStringUTFChars(jfname,fname);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGBoosterSaveModel
* Signature: (JLjava/lang/String;)V
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBoosterSaveModel
(JNIEnv *jenv, jclass jcls, jlong jhandle, jstring jfname) {
BoosterHandle handle = (BoosterHandle) jhandle;
const char* fname = jenv->GetStringUTFChars(jfname, 0);
int ret = XGBoosterSaveModel(handle, fname);
if (fname) jenv->ReleaseStringUTFChars(jfname, fname);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGBoosterLoadModelFromBuffer
* Signature: (J[B)I
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBoosterLoadModelFromBuffer
(JNIEnv *jenv, jclass jcls, jlong jhandle, jbyteArray jbytes) {
BoosterHandle handle = (BoosterHandle) jhandle;
jbyte* buffer = jenv->GetByteArrayElements(jbytes, 0);
int ret = XGBoosterLoadModelFromBuffer(
handle, buffer, jenv->GetArrayLength(jbytes));
jenv->ReleaseByteArrayElements(jbytes, buffer, 0);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGBoosterGetModelRaw
* Signature: (J[[B)I
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBoosterGetModelRaw
(JNIEnv * jenv, jclass jcls, jlong jhandle, jobjectArray jout) {
BoosterHandle handle = (BoosterHandle) jhandle;
bst_ulong len = 0;
const char* result;
int ret = XGBoosterGetModelRaw(handle, &len, &result);
if (result) {
jbyteArray jarray = jenv->NewByteArray(len);
jenv->SetByteArrayRegion(jarray, 0, len, (jbyte*)result);
jenv->SetObjectArrayElement(jout, 0, jarray);
}
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGBoosterDumpModel
* Signature: (JLjava/lang/String;I)[Ljava/lang/String;
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBoosterDumpModel
(JNIEnv *jenv, jclass jcls, jlong jhandle, jstring jfmap, jint jwith_stats, jobjectArray jout) {
BoosterHandle handle = (BoosterHandle) jhandle;
const char *fmap = jenv->GetStringUTFChars(jfmap, 0);
bst_ulong len = 0;
char **result;
int ret = XGBoosterDumpModel(handle, fmap, jwith_stats, &len, (const char ***) &result);
jsize jlen = (jsize) len;
jobjectArray jinfos = jenv->NewObjectArray(jlen, jenv->FindClass("java/lang/String"), jenv->NewStringUTF(""));
for(int i=0 ; i<jlen; i++) {
jenv->SetObjectArrayElement(jinfos, i, jenv->NewStringUTF((const char*) result[i]));
}
jenv->SetObjectArrayElement(jout, 0, jinfos);
if (fmap) jenv->ReleaseStringUTFChars(jfmap, (const char *)fmap);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGBoosterLoadRabitCheckpoint
* Signature: (J[I)I
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBoosterLoadRabitCheckpoint
(JNIEnv *jenv , jclass jcls, jlong jhandle, jintArray jout) {
BoosterHandle handle = (BoosterHandle) jhandle;
int version;
int ret = XGBoosterLoadRabitCheckpoint(handle, &version);
jint jversion = version;
jenv->SetIntArrayRegion(jout, 0, 1, &jversion);
return ret;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: XGBoosterSaveRabitCheckpoint
* Signature: (J)I
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_XGBoosterSaveRabitCheckpoint
(JNIEnv *jenv, jclass jcls, jlong jhandle) {
BoosterHandle handle = (BoosterHandle) jhandle;
return XGBoosterSaveRabitCheckpoint(handle);
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: RabitInit
* Signature: ([Ljava/lang/String;)I
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_RabitInit
(JNIEnv *jenv, jclass jcls, jobjectArray jargs) {
std::vector<std::string> args;
std::vector<char*> argv;
bst_ulong len = (bst_ulong)jenv->GetArrayLength(jargs);
for (bst_ulong i = 0; i < len; ++i) {
jstring arg = (jstring)jenv->GetObjectArrayElement(jargs, i);
const char *s = jenv->GetStringUTFChars(arg, 0);
args.push_back(std::string(s, jenv->GetStringLength(arg)));
if (s != nullptr) jenv->ReleaseStringUTFChars(arg, s);
if (args.back().length() == 0) args.pop_back();
}
for (size_t i = 0; i < args.size(); ++i) {
argv.push_back(&args[i][0]);
}
RabitInit(args.size(), dmlc::BeginPtr(argv));
return 0;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: RabitFinalize
* Signature: ()I
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_RabitFinalize
(JNIEnv *jenv, jclass jcls) {
RabitFinalize();
return 0;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: RabitTrackerPrint
* Signature: (Ljava/lang/String;)I
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_RabitTrackerPrint
(JNIEnv *jenv, jclass jcls, jstring jmsg) {
std::string str(jenv->GetStringUTFChars(jmsg, 0),
jenv->GetStringLength(jmsg));
RabitTrackerPrint(str.c_str());
return 0;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: RabitGetRank
* Signature: ([I)I
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_RabitGetRank
(JNIEnv *jenv, jclass jcls, jintArray jout) {
jint rank = RabitGetRank();
jenv->SetIntArrayRegion(jout, 0, 1, &rank);
return 0;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: RabitGetWorldSize
* Signature: ([I)I
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_RabitGetWorldSize
(JNIEnv *jenv, jclass jcls, jintArray jout) {
jint out = RabitGetWorldSize();
jenv->SetIntArrayRegion(jout, 0, 1, &out);
return 0;
}
/*
* Class: ml_dmlc_xgboost4j_java_XGBoostJNI
* Method: RabitVersionNumber
* Signature: ([I)I
*/
JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_RabitVersionNumber
(JNIEnv *jenv, jclass jcls, jintArray jout) {
jint out = RabitVersionNumber();
jenv->SetIntArrayRegion(jout, 0, 1, &out);
return 0;
}