/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the COPYING file, which can be found at the root of the source code       *
 * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*
 *  For details of the HDF libraries, see the HDF Documentation at:
 *    http://hdfgroup.org/HDF5/doc/
 *
 */

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#include <jni.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "hdf5.h"
#include "h5util.h"
#include "h5dImp.h"

extern JavaVM *jvm;
extern jobject visit_callback;

#ifdef __cplusplus
  #ifdef _WINDOWS
    #include <direct.h>
  #endif
  #define CBENVPTR (cbenv)
  #define CBENVPAR
  #define JVMPTR (jvm)
  #define JVMPAR
  #define JVMPAR2
#else
  #define CBENVPTR (*cbenv)
  #define CBENVPAR cbenv,
  #define JVMPTR (*jvm)
  #define JVMPAR jvm
  #define JVMPAR2 jvm,
#endif

/********************/
/* Local Prototypes */
/********************/

static herr_t H5DreadVL_asstr (JNIEnv *env, hid_t did, hid_t tid, hid_t mem_sid, hid_t file_sid, hid_t xfer_plist_id, jobjectArray buf);
static herr_t H5DreadVL_str (JNIEnv *env, hid_t did, hid_t tid, hid_t mem_sid, hid_t file_sid, hid_t xfer_plist_id, jobjectArray buf);
static herr_t H5DreadVL_array (JNIEnv *env, hid_t did, hid_t tid, hid_t mem_sid, hid_t file_sid, hid_t xfer_plist_id, jobjectArray buf);
static herr_t H5DwriteVL_asstr (JNIEnv *env, hid_t did, hid_t tid, hid_t mem_sid, hid_t file_sid, hid_t xfer_plist_id, jobjectArray buf);
static herr_t H5DwriteVL_str (JNIEnv *env, hid_t did, hid_t tid, hid_t mem_sid, hid_t file_sid, hid_t xfer_plist_id, jobjectArray buf);
static herr_t H5DwriteVL_array (JNIEnv *env, hid_t did, hid_t tid, hid_t mem_sid, hid_t file_sid, hid_t xfer_plist_id, jobjectArray buf);

/********************/
/* Local Macros     */
/********************/

#define PIN_BYTE_ARRAY() { \
    if (isCriticalPinning) \
        buffP = (jbyte*)ENVPTR->GetPrimitiveArrayCritical(ENVPAR buf, &isCopy); \
    else \
        buffP = ENVPTR->GetByteArrayElements(ENVPAR buf, &isCopy); \
}

#define UNPIN_BYTE_ARRAY(mode) { \
    if (isCriticalPinning) \
        ENVPTR->ReleasePrimitiveArrayCritical(ENVPAR buf, buffP, mode); \
    else \
        ENVPTR->ReleaseByteArrayElements(ENVPAR buf, buffP, mode); \
}

#define PIN_SHORT_ARRAY() { \
    if (isCriticalPinning) \
        buffP = (jshort*)ENVPTR->GetPrimitiveArrayCritical(ENVPAR buf, &isCopy); \
    else \
        buffP = ENVPTR->GetShortArrayElements(ENVPAR buf, &isCopy); \
}

#define UNPIN_SHORT_ARRAY(mode) { \
    if (isCriticalPinning) \
        ENVPTR->ReleasePrimitiveArrayCritical(ENVPAR buf, buffP, mode); \
    else \
        ENVPTR->ReleaseShortArrayElements(ENVPAR buf, buffP, mode); \
}

#define PIN_INT_ARRAY() { \
    if (isCriticalPinning) \
        buffP = (jint*)ENVPTR->GetPrimitiveArrayCritical(ENVPAR buf, &isCopy); \
    else \
        buffP = ENVPTR->GetIntArrayElements(ENVPAR buf, &isCopy); \
}

#define UNPIN_INT_ARRAY(mode) { \
    if (isCriticalPinning) \
        ENVPTR->ReleasePrimitiveArrayCritical(ENVPAR buf, buffP, mode); \
    else \
        ENVPTR->ReleaseIntArrayElements(ENVPAR buf, buffP, mode); \
}

#define PIN_LONG_ARRAY() { \
    if (isCriticalPinning) \
        buffP = (jlong*)ENVPTR->GetPrimitiveArrayCritical(ENVPAR buf, &isCopy); \
    else \
        buffP = ENVPTR->GetLongArrayElements(ENVPAR buf,&isCopy); \
}

#define UNPIN_LONG_ARRAY(mode) { \
    if (isCriticalPinning) \
        ENVPTR->ReleasePrimitiveArrayCritical(ENVPAR buf, buffP, mode); \
    else \
        ENVPTR->ReleaseLongArrayElements(ENVPAR buf, buffP, mode); \
}

#define PIN_FLOAT_ARRAY() { \
    if (isCriticalPinning) \
        buffP = (jfloat*)ENVPTR->GetPrimitiveArrayCritical(ENVPAR buf, &isCopy); \
    else \
        buffP = ENVPTR->GetFloatArrayElements(ENVPAR buf, &isCopy); \
}

#define UNPIN_FLOAT_ARRAY(mode) { \
    if (isCriticalPinning) \
        ENVPTR->ReleasePrimitiveArrayCritical(ENVPAR buf, buffP, mode); \
    else \
        ENVPTR->ReleaseFloatArrayElements(ENVPAR buf, buffP, mode); \
}

#define PIN_DOUBLE_ARRAY() { \
    if (isCriticalPinning) \
        buffP = (jdouble*)ENVPTR->GetPrimitiveArrayCritical(ENVPAR buf, &isCopy); \
    else \
        buffP = ENVPTR->GetDoubleArrayElements(ENVPAR buf, &isCopy); \
}

#define UNPIN_DOUBLE_ARRAY(mode) { \
    if (isCriticalPinning) \
        ENVPTR->ReleasePrimitiveArrayCritical(ENVPAR buf, buffP, mode); \
    else \
        ENVPTR->ReleaseDoubleArrayElements(ENVPAR buf, buffP, mode); \
}

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    _H5Dcreate
 * Signature: (JLjava/lang/String;JJJ)J
 */
JNIEXPORT jlong JNICALL
Java_hdf_hdf5lib_H5__1H5Dcreate
    (JNIEnv *env, jclass clss, jlong loc_id, jstring name, jlong type_id,
          jlong space_id, jlong create_plist_id)
{
    hid_t       dset_id = -1;
    const char *fileName;

    PIN_JAVA_STRING(name, fileName);
    if (fileName != NULL) {
        dset_id = H5Dcreate2((hid_t)loc_id, fileName, (hid_t)type_id, (hid_t)space_id, H5P_DEFAULT, (hid_t)create_plist_id, H5P_DEFAULT);

        UNPIN_JAVA_STRING(name, fileName);

        if (dset_id < 0)
            h5libraryError(env);
    }

    return (jlong)dset_id;
} /* end Java_hdf_hdf5lib_H5__1H5Dcreate */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    _H5Dopen
 * Signature: (JLjava/lang/String;)J
 */
JNIEXPORT jlong JNICALL
Java_hdf_hdf5lib_H5__1H5Dopen
    (JNIEnv *env, jclass clss, jlong loc_id, jstring name)
{
    hid_t       dset_id = -1;
    const char *fileName;

    PIN_JAVA_STRING(name, fileName);
    if (fileName != NULL) {
        dset_id = H5Dopen2((hid_t)loc_id, fileName, H5P_DEFAULT);

        UNPIN_JAVA_STRING(name, fileName);
        if (dset_id < 0)
            h5libraryError(env);
    }

    return (jlong)dset_id;
} /* end Java_hdf_hdf5lib_H5__1H5Dopen */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    _H5Dget_space
 * Signature: (J)J
 */
JNIEXPORT jlong JNICALL
Java_hdf_hdf5lib_H5__1H5Dget_1space
    (JNIEnv *env, jclass clss, jlong dataset_id)
{
    hid_t retVal = -1;

    retVal = H5Dget_space((hid_t)dataset_id);
    if (retVal < 0)
        h5libraryError(env);

    return (jlong)retVal;
} /* end Java_hdf_hdf5lib_H5__1H5Dget_1space */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    _H5Dget_type
 * Signature: (J)J
 */
JNIEXPORT jlong JNICALL
Java_hdf_hdf5lib_H5__1H5Dget_1type
    (JNIEnv *env, jclass clss, jlong dataset_id)
{
    hid_t retVal = -1;

    retVal = H5Dget_type((hid_t)dataset_id);
    if (retVal < 0)
        h5libraryError(env);

    return (jlong)retVal;
} /* end Java_hdf_hdf5lib_H5__1H5Dget_1type */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    _H5Dget_create_plist
 * Signature: (J)J
 */
JNIEXPORT jlong JNICALL
Java_hdf_hdf5lib_H5__1H5Dget_1create_1plist
    (JNIEnv *env, jclass clss, jlong dataset_id)
{
    hid_t retVal = -1;

    retVal = H5Dget_create_plist((hid_t)dataset_id);
    if (retVal < 0)
        h5libraryError(env);

    return (jlong)retVal;
} /* end Java_hdf_hdf5lib_H5__1H5Dget_1create_1plist */

static htri_t
H5Tdetect_variable_str
    (hid_t tid) {
    htri_t ret_val = 0;

    if (H5Tget_class(tid) == H5T_COMPOUND) {
        unsigned i;
        unsigned nm = (unsigned)H5Tget_nmembers(tid);
        for(i = 0; i < nm; i++) {
            htri_t status = 0;
            hid_t mtid = 0;
            if((mtid = H5Tget_member_type(tid, i)) < 0)
                return -1; /* exit immediately on error */
            if((status = H5Tdetect_variable_str(mtid)) < 0)
                return status; /* exit immediately on error */
            ret_val |= status;
            H5Tclose (mtid);
        } /* end for */
    } /* end if */
    else
        ret_val = H5Tis_variable_str(tid);

    return ret_val;
} /* end H5Tdetect_variable_str */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dread
 * Signature: (JJJJJ[BZ)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dread
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jbyteArray buf, jboolean isCriticalPinning)
{
    herr_t   status = -1;
    jbyte   *buffP;
    jboolean isCopy;
    htri_t data_class;

    if (buf == NULL) {
        h5nullArgument(env, "H5Dread:  buf is NULL");
    } /* end if */
    else if((data_class = H5Tdetect_class(mem_type_id, H5T_VLEN)) < 0) {
        h5JNIFatalError(env, "H5Dread: H5Tdetect_class() failed");
    } /* end else if */
    else  if(data_class == 1) {
        h5badArgument(env, "H5Dread:  buf does not support variable length type");
    } /* end else if */
    else {
        /* recursive detect any vlen string in type (compound, array ...) */
        if((data_class = H5Tdetect_variable_str(mem_type_id)) < 0) {
            h5JNIFatalError(env, "H5Dread: H5Tdetect_variable_str() failed");
        } /* end if */
        else  if(data_class == 1) {
            h5badArgument(env, "H5Dread:  buf does not support variable length type");
        } /* end else if */
        else {
            PIN_BYTE_ARRAY();

            if (buffP == NULL) {
                h5JNIFatalError(env, "H5Dread:  buf not pinned");
            } /* end if */
            else {
                status = H5Dread((hid_t)dataset_id, (hid_t)mem_type_id, (hid_t)mem_space_id,
                                (hid_t)file_space_id, (hid_t)xfer_plist_id, buffP);

                if (status < 0) {
                    UNPIN_BYTE_ARRAY(JNI_ABORT);
                    h5libraryError(env);
                } /* end if */
                else {
                    UNPIN_BYTE_ARRAY(0); /* update java buffer for return */
                } /* end else */
            } /* end else */
        } /* end else */
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dread */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dwrite
 * Signature: (JJJJJ[BZ)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dwrite
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jbyteArray buf, jboolean isCriticalPinning)
{
    herr_t   status = -1;
    jbyte   *buffP;
    jboolean isCopy;
    htri_t data_class;

    if (buf == NULL) {
        h5nullArgument(env, "H5Dwrite:  buf is NULL");
    } /* end if */
    else if((data_class = H5Tdetect_class(mem_type_id, H5T_VLEN)) < 0) {
        h5JNIFatalError(env, "H5Dwrite: H5Tdetect_class() failed");
    } /* end else if */
    else  if(data_class == 1) {
        h5badArgument(env, "H5Dwrite:  buf does not support variable length type");
    } /* end else if */
    else {
        /* recursive detect any vlen string in type (compound, array ...) */
        if((data_class = H5Tdetect_variable_str(mem_type_id)) < 0) {
            h5JNIFatalError(env, "H5Dwrite: H5Tdetect_variable_str() failed");
        } /* end if */
        else  if(data_class == 1) {
            h5badArgument(env, "H5Dwrite:  buf does not support variable length type");
        } /* end else if */
        else {
            PIN_BYTE_ARRAY();
            if (buffP == NULL) {
                h5JNIFatalError(env, "H5Dwrite:  buf not pinned");
            } /* end if */
            else {
                status = H5Dwrite((hid_t)dataset_id, (hid_t)mem_type_id, (hid_t)mem_space_id,
                                (hid_t)file_space_id, (hid_t)xfer_plist_id, buffP);

                UNPIN_BYTE_ARRAY(JNI_ABORT); /* no need to update buffer */

                if (status < 0)
                    h5libraryError(env);
            } /* end else */
        } /* end else */
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dwrite */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    _H5Dclose
 * Signature: (J)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5__1H5Dclose
    (JNIEnv *env, jclass clss, jlong dataset_id)
{
    herr_t retVal = -1;

    retVal = H5Dclose((hid_t)dataset_id);

    if (retVal < 0)
        h5libraryError(env);

    return (jint)retVal;
} /* end Java_hdf_hdf5lib_H5__1H5Dclose */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dget_storage_size
 * Signature: (J)J
 */
JNIEXPORT jlong JNICALL
Java_hdf_hdf5lib_H5_H5Dget_1storage_1size
    (JNIEnv *env, jclass clss, jlong dataset_id)
{
    hsize_t retVal = (hsize_t)-1;

    if (dataset_id < 0) {
        h5badArgument(env, "H5Dget_storage_size: not a dataset");
    } /* end if */
    else {
        retVal = H5Dget_storage_size((hid_t)dataset_id);
    } /* end else */

    return (jlong)retVal;
} /* end Java_hdf_hdf5lib_H5_H5Dget_1storage_1size */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dvlen_reclaim
 * Signature: (JJJ[B)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dvlen_1reclaim
    (JNIEnv *env, jclass clss, jlong type_id, jlong space_id,
          jlong xfer_plist_id, jbyteArray buf)
{
    herr_t   status = -1;
    jbyte   *byteP;
    jboolean isCopy;

    if (buf == NULL) {
        h5nullArgument(env, "H5Dvlen_reclaim:  buf is NULL");
    } /* end if */
    else {
        byteP = ENVPTR->GetByteArrayElements(ENVPAR buf, &isCopy);
        if (byteP == NULL) {
            h5JNIFatalError(env, "H5Dvlen_reclaim:  buf not pinned");
        } /* end if */
        else {
            status = H5Dvlen_reclaim((hid_t)type_id, (hid_t)space_id, (hid_t)xfer_plist_id, byteP);

            ENVPTR->ReleaseByteArrayElements(ENVPAR buf, byteP, JNI_ABORT);

            if (status < 0)
                h5libraryError(env);
        } /* end else */
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dvlen_1reclaim */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dread_short
 * Signature: (JJJJJ[SZ)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dread_1short
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jshortArray buf, jboolean isCriticalPinning)
{
    herr_t   status = -1;
    jshort  *buffP;
    jboolean isCopy;
    htri_t data_class;

    if (buf == NULL) {
        h5nullArgument(env, "H5Dread_short:  buf is NULL");
    } /* end if */
    else if((data_class = H5Tdetect_class(mem_type_id, H5T_VLEN)) < 0) {
        h5JNIFatalError(env, "H5Dread: H5Tdetect_class() failed");
    } /* end else if */
    else  if(data_class == 1) {
        h5badArgument(env, "H5Dread_short:  buf does not support variable length type");
    } /* end else if */
    else {
        /* recursive detect any vlen string in type (compound, array ...) */
        if((data_class = H5Tdetect_variable_str(mem_type_id)) < 0) {
            h5JNIFatalError(env, "H5Dread_short: H5Tdetect_variable_str() failed");
        } /* end if */
        else  if(data_class == 1) {
            h5badArgument(env, "H5Dread_short:  buf does not support variable length type");
        } /* end else if */
        else {
            PIN_SHORT_ARRAY();
            if (buffP == NULL) {
                h5JNIFatalError(env, "H5Dread_short:  buf not pinned");
            } /* end if */
            else {
                status = H5Dread((hid_t)dataset_id, (hid_t)mem_type_id, (hid_t)mem_space_id,
                                (hid_t)file_space_id, (hid_t)xfer_plist_id, buffP);

                if (status < 0) {
                    UNPIN_SHORT_ARRAY(JNI_ABORT);
                    h5libraryError(env);
                } /* end if */
                else {
                    UNPIN_SHORT_ARRAY(0);
                } /* end else */
            } /* end else */
        } /* end else */
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dread_1short */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dwrite_short
 * Signature: (JJJJJ[SZ)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dwrite_1short
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jshortArray buf, jboolean isCriticalPinning)
{
    herr_t   status = -1;
    jshort  *buffP;
    jboolean isCopy;
    htri_t data_class;

    if (buf == NULL ) {
        h5nullArgument(env, "H5Dwrite_short:  buf is NULL");
    } /* end if */
    else if((data_class = H5Tdetect_class(mem_type_id, H5T_VLEN)) < 0) {
        h5JNIFatalError(env, "H5Dwrite_short: H5Tdetect_class() failed");
    } /* end else if */
    else  if(data_class == 1) {
        h5badArgument(env, "H5Dwrite_short:  buf does not support variable length type");
    } /* end else if */
    else {
        /* recursive detect any vlen string in type (compound, array ...) */
        if((data_class = H5Tdetect_variable_str(mem_type_id)) < 0) {
            h5JNIFatalError(env, "H5Dwrite_short: H5Tdetect_variable_str() failed");
        } /* end if */
        else  if(data_class == 1) {
            h5badArgument(env, "H5Dwrite_short:  buf does not support variable length type");
        } /* end else if */
        else {
            PIN_SHORT_ARRAY();
            if (buffP == NULL) {
                h5JNIFatalError(env, "H5Dwrite_short:  buf not pinned");
            } /* end if */
            else {
                status = H5Dwrite((hid_t)dataset_id, (hid_t)mem_type_id, (hid_t)mem_space_id,
                                (hid_t)file_space_id, (hid_t)xfer_plist_id, buffP);

                UNPIN_SHORT_ARRAY(JNI_ABORT);

                if (status < 0)
                    h5libraryError(env);
            } /* end else */
        } /* end else */
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dwrite_1short */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dread_int
 * Signature: (JJJJJ[IZ)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dread_1int
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jintArray buf, jboolean isCriticalPinning)
{
    herr_t   status = -1;
    jint    *buffP;
    jboolean isCopy;
    htri_t data_class;

    if (buf == NULL) {
        h5nullArgument(env, "H5Dread_int:  buf is NULL");
    } /* end if */
    else if((data_class = H5Tdetect_class(mem_type_id, H5T_VLEN)) < 0) {
        h5JNIFatalError(env, "H5Dread_int: H5Tdetect_class() failed");
    } /* end else if */
    else  if(data_class == 1) {
        h5badArgument(env, "H5Dread_int:  buf does not support variable length type");
    } /* end else if */
    else {
        /* recursive detect any vlen string in type (compound, array ...) */
        if((data_class = H5Tdetect_variable_str(mem_type_id)) < 0) {
            h5JNIFatalError(env, "H5Dread_int: H5Tdetect_variable_str() failed");
        } /* end if */
        else  if(data_class == 1) {
            h5badArgument(env, "H5Dread_int:  buf does not support variable length type");
        } /* end else if */
        else {
            PIN_INT_ARRAY();
            if (buffP == NULL) {
                h5JNIFatalError(env, "H5Dread_int:  buf not pinned");
            } /* end if */
            else {
                status = H5Dread((hid_t)dataset_id, (hid_t)mem_type_id, (hid_t)mem_space_id,
                                (hid_t)file_space_id, (hid_t)xfer_plist_id, buffP);

                if (status < 0) {
                    UNPIN_INT_ARRAY(JNI_ABORT);
                    h5libraryError(env);
                } /* end if */
                else {
                    UNPIN_INT_ARRAY(0);
                } /* end else */
            } /* end else */
        } /* end else */
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dread_1int */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dwrite_int
 * Signature: (JJJJJ[IZ)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dwrite_1int
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jintArray buf, jboolean isCriticalPinning)
{
    herr_t   status = -1;
    jint    *buffP;
    jboolean isCopy;
    htri_t data_class;

    if (buf == NULL) {
        h5nullArgument(env, "H5Dwrite_int:  buf is NULL");
    } /* end if */
    else if((data_class = H5Tdetect_class(mem_type_id, H5T_VLEN)) < 0) {
        h5JNIFatalError(env, "H5Dwrite_int: H5Tdetect_class() failed");
    } /* end else if */
    else  if(data_class == 1) {
        h5badArgument(env, "H5Dwrite_int:  buf does not support variable length type");
    } /* end else if */
    else {
        /* recursive detect any vlen string in type (compound, array ...) */
        if((data_class = H5Tdetect_variable_str(mem_type_id)) < 0) {
            h5JNIFatalError(env, "H5Dwrite_int: H5Tdetect_variable_str() failed");
        } /* end if */
        else  if(data_class == 1) {
            h5badArgument(env, "H5Dwrite_int:  buf does not support variable length type");
        } /* end else if */
        else {
            PIN_INT_ARRAY();
            if (buffP == NULL) {
                h5JNIFatalError(env, "H5Dwrite_int:  buf not pinned");
            } /* end if */
            else {
                status = H5Dwrite((hid_t)dataset_id, (hid_t)mem_type_id, (hid_t)mem_space_id,
                                (hid_t)file_space_id, (hid_t)xfer_plist_id, buffP);

                UNPIN_INT_ARRAY(JNI_ABORT);

                if (status < 0)
                    h5libraryError(env);
            } /* end else */
        } /* end else */
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dwrite_1int */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dread_long
 * Signature: (JJJJJ[JZ)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dread_1long
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jlongArray buf, jboolean isCriticalPinning)
{
    herr_t   status = -1;
    jlong   *buffP;
    jboolean isCopy;
    htri_t data_class;

    if (buf == NULL) {
        h5nullArgument(env, "H5Dread_long:  buf is NULL");
    } /* end if */
    else if((data_class = H5Tdetect_class(mem_type_id, H5T_VLEN)) < 0) {
        h5JNIFatalError(env, "H5Dread_long: H5Tdetect_class() failed");
    } /* end else if */
    else  if(data_class == 1) {
        h5badArgument(env, "H5Dread_long:  buf does not support variable length type");
    } /* end else if */
    else {
        /* recursive detect any vlen string in type (compound, array ...) */
        if((data_class = H5Tdetect_variable_str(mem_type_id)) < 0) {
            h5JNIFatalError(env, "H5Dread_long: H5Tdetect_variable_str() failed");
        } /* end if */
        else  if(data_class == 1) {
            h5badArgument(env, "H5Dread_long:  buf does not support variable length type");
        } /* end else if */
        else {
            PIN_LONG_ARRAY();
            if (buffP == NULL) {
                h5JNIFatalError(env, "H5Dread_long:  buf not pinned");
            } /* end if */
            else {
                status = H5Dread((hid_t)dataset_id, (hid_t)mem_type_id, (hid_t)mem_space_id,
                                (hid_t)file_space_id, (hid_t)xfer_plist_id, buffP);

                if (status < 0) {
                    UNPIN_LONG_ARRAY(JNI_ABORT);
                    h5libraryError(env);
                } /* end if */
                else {
                    UNPIN_LONG_ARRAY(0);
                } /* end else */
            } /* end else */
        } /* end else */
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dread_1long */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dwrite_long
 * Signature: (JJJJJ[JZ)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dwrite_1long
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jlongArray buf, jboolean isCriticalPinning)
{
    herr_t   status = -1;
    jlong   *buffP;
    jboolean isCopy;
    htri_t data_class;

    if (buf == NULL) {
        h5nullArgument(env, "H5Dwrite_long:  buf is NULL");
    } /* end if */
    else if((data_class = H5Tdetect_class(mem_type_id, H5T_VLEN)) < 0) {
        h5JNIFatalError(env, "H5Dwrite_long: H5Tdetect_class() failed");
    } /* end else if */
    else  if(data_class == 1) {
        h5badArgument(env, "H5Dwrite_long:  buf does not support variable length type");
    } /* end else if */
    else {
        /* recursive detect any vlen string in type (compound, array ...) */
        if((data_class = H5Tdetect_variable_str(mem_type_id)) < 0) {
            h5JNIFatalError(env, "H5Dwrite_long: H5Tdetect_variable_str() failed");
        } /* end if */
        else  if(data_class == 1) {
            h5badArgument(env, "H5Dwrite_long:  buf does not support variable length type");
        } /* end else if */
        else {
            PIN_LONG_ARRAY();
            if (buffP == NULL) {
                h5JNIFatalError(env, "H5Dwrite_long:  buf not pinned");
            } /* end if */
            else {
                status = H5Dwrite((hid_t)dataset_id, (hid_t)mem_type_id, (hid_t)mem_space_id,
                                (hid_t)file_space_id, (hid_t)xfer_plist_id, buffP);

                UNPIN_LONG_ARRAY(JNI_ABORT);
                if (status < 0)
                    h5libraryError(env);
            } /* end else */
        } /* end else */
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dwrite_1long */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dread_float
 * Signature: (JJJJJ[FZ)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dread_1float
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jfloatArray buf, jboolean isCriticalPinning)
{
    herr_t   status = -1;
    jfloat  *buffP;
    jboolean isCopy;
    htri_t data_class;

    if (buf == NULL) {
        h5nullArgument(env, "H5Dread_float:  buf is NULL");
    } /* end if */
    else if((data_class = H5Tdetect_class(mem_type_id, H5T_VLEN)) < 0) {
        h5JNIFatalError(env, "H5Dread_float: H5Tdetect_class() failed");
    } /* end else if */
    else  if(data_class == 1) {
        h5badArgument(env, "H5Dread_float:  buf does not support variable length type");
    } /* end else if */
    else {
        /* recursive detect any vlen string in type (compound, array ...) */
        if((data_class = H5Tdetect_variable_str(mem_type_id)) < 0) {
            h5JNIFatalError(env, "H5Dread_float: H5Tdetect_variable_str() failed");
        } /* end if */
        else  if(data_class == 1) {
            h5badArgument(env, "H5Dread_float:  buf does not support variable length type");
        } /* end else if */
        else {
            PIN_FLOAT_ARRAY();
            if (buffP == NULL) {
                h5JNIFatalError(env, "H5Dread_float:  buf not pinned");
            } /* end if */
            else {
                status = H5Dread((hid_t)dataset_id, (hid_t)mem_type_id, (hid_t)mem_space_id,
                                (hid_t)file_space_id, (hid_t)xfer_plist_id, buffP);

                if (status < 0) {
                    UNPIN_FLOAT_ARRAY(JNI_ABORT);
                    h5libraryError(env);
                } /* end if */
                else {
                    UNPIN_FLOAT_ARRAY(0);
                } /* end else */
            } /* end else */
        } /* end else */
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dread_1float */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dwrite_float
 * Signature: (JJJJJ[FZ)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dwrite_1float
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jfloatArray buf, jboolean isCriticalPinning)
{
    herr_t   status = -1;
    jfloat  *buffP;
    jboolean isCopy;
    htri_t data_class;

    if (buf == NULL) {
        h5nullArgument(env, "H5Dwrite_float:  buf is NULL");
    } /* end if */
    else if((data_class = H5Tdetect_class(mem_type_id, H5T_VLEN)) < 0) {
        h5JNIFatalError(env, "H5Dwrite_float: H5Tdetect_class() failed");
    } /* end else if */
    else  if(data_class == 1) {
        h5badArgument(env, "H5Dwrite_float:  buf does not support variable length type");
    } /* end else if */
    else {
        /* recursive detect any vlen string in type (compound, array ...) */
        if((data_class = H5Tdetect_variable_str(mem_type_id)) < 0) {
            h5JNIFatalError(env, "H5Dwrite_float: H5Tdetect_variable_str() failed");
        } /* end if */
        else  if(data_class == 1) {
            h5badArgument(env, "H5Dwrite_float:  buf does not support variable length type");
        } /* end else if */
        else {
            PIN_FLOAT_ARRAY();
            if (buffP == NULL) {
                h5JNIFatalError(env, "H5Dwrite_float:  buf not pinned");
            } /* end if */
            else {
                status = H5Dwrite((hid_t)dataset_id, (hid_t)mem_type_id, (hid_t)mem_space_id,
                                (hid_t)file_space_id, (hid_t)xfer_plist_id, buffP);

                UNPIN_FLOAT_ARRAY(JNI_ABORT);
                if (status < 0)
                    h5libraryError(env);
            } /* end else */
        } /* end else */
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dwrite_1float */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dread_double
 * Signature: (JJJJJ[DZ)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dread_1double
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jdoubleArray buf, jboolean isCriticalPinning)
{
    herr_t   status = -1;
    jdouble *buffP;
    jboolean isCopy;
    htri_t data_class;

    if (buf == NULL) {
        h5nullArgument(env, "H5Dread_double:  buf is NULL");
    } /* end if */
    else if((data_class = H5Tdetect_class(mem_type_id, H5T_VLEN)) < 0) {
        h5JNIFatalError(env, "H5Dread_double: H5Tdetect_class() failed");
    } /* end else if */
    else  if(data_class == 1) {
        h5badArgument(env, "H5Dread_double:  buf does not support variable length type");
    } /* end else if */
    else {
        /* recursive detect any vlen string in type (compound, array ...) */
        if((data_class = H5Tdetect_variable_str(mem_type_id)) < 0) {
            h5JNIFatalError(env, "H5Dread_double: H5Tdetect_variable_str() failed");
        } /* end if */
        else  if(data_class == 1) {
            h5badArgument(env, "H5Dread_double:  buf does not support variable length type");
        } /* end else if */
        else {
            PIN_DOUBLE_ARRAY();
            if (buffP == NULL) {
                h5JNIFatalError(env, "H5Dread_double:  buf not pinned");
            } /* end if */
            else {
                status = H5Dread((hid_t)dataset_id, (hid_t)mem_type_id, (hid_t)mem_space_id,
                                (hid_t)file_space_id, (hid_t)xfer_plist_id, buffP);

                if (status < 0) {
                    UNPIN_DOUBLE_ARRAY(JNI_ABORT);
                    h5libraryError(env);
                } /* end if */
                else {
                    UNPIN_DOUBLE_ARRAY(0);
                } /* end else */
            } /* end else */
        } /* end else */
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dread_1double */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dwrite_double
 * Signature: (JJJJJ[DZ)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dwrite_1double
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jdoubleArray buf, jboolean isCriticalPinning)
{
    herr_t   status = -1;
    jdouble *buffP;
    jboolean isCopy;
    htri_t data_class;

    if (buf == NULL) {
        h5nullArgument(env, "H5Dwrite_double:  buf is NULL");
    } /* end if */
    else if((data_class = H5Tdetect_class(mem_type_id, H5T_VLEN)) < 0) {
        h5JNIFatalError(env, "H5Dwrite_double: H5Tdetect_class() failed");
    } /* end else if */
    else  if(data_class == 1) {
        h5badArgument(env, "H5Dwrite_double:  buf does not support variable length type");
    } /* end else if */
    else {
        /* recursive detect any vlen string in type (compound, array ...) */
        if((data_class = H5Tdetect_variable_str(mem_type_id)) < 0) {
            h5JNIFatalError(env, "H5Dwrite_double: H5Tdetect_variable_str() failed");
        } /* end if */
        else  if(data_class == 1) {
            h5badArgument(env, "H5Dwrite_double:  buf does not support variable length type");
        } /* end else if */
        else {
            PIN_DOUBLE_ARRAY();
            if (buffP == NULL) {
                h5JNIFatalError(env, "H5Dwrite_double:  buf not pinned");
            } /* end if */
            else {
                status = H5Dwrite((hid_t)dataset_id, (hid_t)mem_type_id, (hid_t)mem_space_id,
                                (hid_t)file_space_id, (hid_t)xfer_plist_id, buffP);

                UNPIN_DOUBLE_ARRAY(JNI_ABORT);
                if (status < 0)
                    h5libraryError(env);
            } /* end else */
        } /* end else */
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dwrite_1double */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dread_string
 * Signature: (JJJJJ[Ljava/lang/String;)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dread_1string
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jobjectArray j_buf)
{
    herr_t  status = -1;
    char   *c_buf;
    char   *cstr;
    size_t  str_len;
    jsize   i;
    jsize   n;
    size_t  pos;
    jstring jstr;

    c_buf = cstr = NULL;
    if (j_buf == NULL) {
        h5nullArgument(env, "H5Dread_string:  buf is NULL");
    } /* end if */
    else if ((n = ENVPTR->GetArrayLength(ENVPAR j_buf)) <= 0) {
        h5nullArgument(env, "H5Dread_string:  buf length <= 0");
    } /* end else if */
    else if ((str_len = H5Tget_size((hid_t)mem_type_id)) <=0) {
        h5libraryError(env);
    } /* end else if */
    else {
        if ((cstr = (char*)HDmalloc(str_len + 1)) == NULL) {
            h5JNIFatalError(env, "H5Dread_string: memory allocation failed.");
        } /* end if */
        else {
            if ((c_buf = (char*)HDmalloc((size_t)n * str_len)) == NULL) {
                if (cstr)
                    HDfree(cstr);
                cstr = NULL;
                h5JNIFatalError(env, "H5Dread_string: memory allocation failed.");
            } /* end if */
            else {
                status = H5Dread((hid_t)dataset_id, (hid_t)mem_type_id, (hid_t)mem_space_id,
                                (hid_t)file_space_id, (hid_t)xfer_plist_id, c_buf);

                if (status < 0) {
                    if (cstr)
                        HDfree(cstr);
                    cstr = NULL;
                    if (c_buf)
                        HDfree(c_buf);
                    c_buf = NULL;
                    h5libraryError(env);
                } /* end if */
                else {
                    pos = 0;
                    for (i = 0; i < n; i++) {
                        HDmemcpy(cstr, c_buf+pos, str_len);
                        cstr[str_len] = '\0';
                        jstr = ENVPTR->NewStringUTF(ENVPAR cstr);
                        ENVPTR->SetObjectArrayElement(ENVPAR j_buf, i, jstr);
                        pos += str_len;
                    } /* end for */
                } /* end else */

                if (c_buf)
                    HDfree(c_buf);
            } /* end else cbuf allocation*/

            if (cstr)
                HDfree(cstr);
        } /* end else cstr allocation*/
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dread_1string */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dwrite_string
 * Signature: (JJJJJ[Ljava/lang/String;)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dwrite_1string
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jobjectArray j_buf)
{
    herr_t  status = -1;
    char   *c_buf;
    jsize  str_len;
    jsize   i;
    jsize   n;

    if (j_buf == NULL) {
        h5nullArgument(env, "H5Dwrite_string:  buf is NULL");
    } /* end if */
    else if ((n = ENVPTR->GetArrayLength(ENVPAR j_buf)) <= 0) {
        h5nullArgument(env, "H5Dwrite_string:  buf length <= 0");
    } /* end else if */
    else if ((str_len = (jsize)H5Tget_size((hid_t)mem_type_id)) <=0) {
        h5libraryError(env);
    } /* end else if */
    else {
        if ((c_buf = (char*)HDmalloc((size_t)n * (size_t)str_len)) == NULL) {
            h5JNIFatalError(env, "H5Dwrite_string: memory allocation failed.");
        } /* end if */
        else {
            for (i = 0; i < n; i++) {
                jstring obj = (jstring)ENVPTR->GetObjectArrayElement(ENVPAR (jobjectArray)j_buf, i);
                if (obj != 0) {
                    jsize length = ENVPTR->GetStringUTFLength(ENVPAR obj);
                    const char *utf8 = ENVPTR->GetStringUTFChars(ENVPAR obj, 0);

                    if (utf8) {
                        strncpy(&c_buf[i * str_len], utf8, str_len);
                    } /* end if */

                    ENVPTR->ReleaseStringUTFChars(ENVPAR obj, utf8);
                    ENVPTR->DeleteLocalRef(ENVPAR obj);
                } /* end if */
            } /* end for */

            status = H5Dwrite((hid_t)dataset_id, (hid_t)mem_type_id, (hid_t)mem_space_id,
                            (hid_t)file_space_id, (hid_t)xfer_plist_id, c_buf);

            if (c_buf)
                HDfree(c_buf);
            c_buf = NULL;

            if (status < 0) {
                h5libraryError(env);
            } /* end if */
        } /* end else */
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dwrite_1string */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5DreadVL
 * Signature: (JJJJJ[Ljava/lang/String;)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5DreadVL
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jobjectArray buf)
{
    herr_t  status = -1;
    htri_t  isStr = 0;
    htri_t  isVlenStr = 0;
    htri_t  isComplex = 0;

    if (buf == NULL) {
        h5nullArgument(env, "H5DreadVL:  buf is NULL");
    } /* end if */
    else {
        isStr = H5Tdetect_class((hid_t)mem_type_id, H5T_STRING);
        if (H5Tget_class((hid_t)mem_type_id) == H5T_COMPOUND) {
            unsigned i;
            int nm = H5Tget_nmembers(mem_type_id);
            for(i = 0; i <nm; i++) {
                hid_t nested_tid = H5Tget_member_type((hid_t)mem_type_id, i);
                isComplex = H5Tdetect_class((hid_t)nested_tid, H5T_COMPOUND) ||
                            H5Tdetect_class((hid_t)nested_tid, H5T_VLEN);
                H5Tclose(nested_tid);
            }
        }
        else if (H5Tget_class((hid_t)mem_type_id) == H5T_VLEN) {
            isVlenStr = 1; /* strings created by H5Tvlen_create(H5T_C_S1) */
        }
        if (isStr == 0 || isComplex>0 || isVlenStr) {
            status = H5DreadVL_asstr(env, (hid_t)dataset_id, (hid_t)mem_type_id,
                                        (hid_t)mem_space_id, (hid_t)file_space_id,
                                        (hid_t)xfer_plist_id, buf);
        }
        else if (isStr > 0) {
            status = H5DreadVL_str(env, (hid_t)dataset_id, (hid_t)mem_type_id,
                                        (hid_t)mem_space_id, (hid_t)file_space_id,
                                        (hid_t)xfer_plist_id, buf);
        }
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dread_1VL */

herr_t
H5DreadVL_asstr
    (JNIEnv *env, hid_t did, hid_t tid, hid_t mem_sid, hid_t file_sid, hid_t xfer_plist_id, jobjectArray buf)
{
    jint    i;
    jint    n;
    jstring jstr;
    h5str_t h5str;
    hvl_t  *rdata;
    size_t  size;
    size_t  max_len = 0;
    herr_t  status = -1;

    /* Get size of string array */
    n = ENVPTR->GetArrayLength(ENVPAR buf);
    /* we will need to read n number of hvl_t structures */
    rdata = (hvl_t*)HDcalloc((size_t)n, sizeof(hvl_t));
    if (rdata == NULL) {
        h5JNIFatalError(env, "H5DreadVL_asstr:  failed to allocate buff for read");
    } /* end if */
    else {
        status = H5Dread(did, tid, mem_sid, file_sid, xfer_plist_id, rdata);

        if (status < 0) {
            H5Dvlen_reclaim(tid, mem_sid, xfer_plist_id, rdata);
            HDfree(rdata);
            h5JNIFatalError(env, "H5DreadVL_asstr: failed to read data");
        } /* end if */
        else {
            /* calculate the largest size of all the hvl_t structures read */
            max_len = 1;
            for (i=0; i < n; i++) {
                if ((rdata + i)->len > max_len)
                    max_len = (rdata + i)->len;
            }

            /* create one malloc to hold largest element */
            size = H5Tget_size(tid) * max_len;
            HDmemset(&h5str, 0, sizeof(h5str_t));
            h5str_new(&h5str, 4 * size);

            if (h5str.s == NULL) {
                H5Dvlen_reclaim(tid, mem_sid, xfer_plist_id, rdata);
                HDfree(rdata);
                h5JNIFatalError(env, "H5DreadVL_asstr:  failed to allocate buf");
            } /* end if */
            else {
                H5T_class_t tclass = H5Tget_class(tid);
                /* convert each element to char string */
                for (i=0; i < n; i++) {
                    h5str.s[0] = '\0';
                    h5str_vlsprintf(&h5str, did, tid, rdata+i, 0);
                    jstr = ENVPTR->NewStringUTF(ENVPAR h5str.s);
                    ENVPTR->SetObjectArrayElement(ENVPAR buf, i, jstr);
                } /* end for */
                h5str_free(&h5str);

                H5Dvlen_reclaim(tid, mem_sid, xfer_plist_id, rdata);
                HDfree(rdata);
            } /* end else */
        } /* end else */
    } /* end else */

    return status;
}

/**
 *  Read VLEN data into array of arrays.
 *  Object[] buf contains VL arrays of data points
 *  Currently only deal with variable length of atomic data types
 */
/* old version */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dread_VLStrings
 * Signature: (JJJJJ[Ljava/lang/String;)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dread_1VLStrings
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jobjectArray buf)
{
    herr_t  status = -1;
    htri_t  isVlenStr=0;

    if (buf == NULL) {
        h5nullArgument(env, "H5Dread_VLStrings:  buf is NULL");
    } /* end if */
    else {
        isVlenStr = H5Tdetect_class((hid_t)mem_type_id, H5T_STRING);

        if (isVlenStr) {
            status = H5DreadVL_str(env, (hid_t)dataset_id, (hid_t)mem_type_id,
                                        (hid_t)mem_space_id, (hid_t)file_space_id,
                                        (hid_t)xfer_plist_id, buf);
        } /* end if */
        else
            h5badArgument(env, "H5Dread_VLStrings: type is not variable length String");
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dread_1VLStrings */

herr_t
H5DreadVL_str
    (JNIEnv *env, hid_t did, hid_t tid, hid_t mem_sid, hid_t file_sid, hid_t xfer_plist_id, jobjectArray buf)
{
    char  **strs;
    jstring jstr;
    jint    i;
    jint    n;
    herr_t  status = -1;

    n = ENVPTR->GetArrayLength(ENVPAR buf);
    strs =(char**)HDcalloc((size_t)n, sizeof(char*));

    if (strs == NULL) {
        h5JNIFatalError(env, "H5DreadVL_str:  failed to allocate buff for read variable length strings");
    } /* end if */
    else {
        status = H5Dread(did, tid, mem_sid, file_sid, xfer_plist_id, strs);

        if (status < 0) {
            H5Dvlen_reclaim(tid, mem_sid, xfer_plist_id, strs);
            HDfree(strs);
            h5JNIFatalError(env, "H5DreadVL_str: failed to read variable length strings");
        } /* end if */
        else {
            for (i=0; i < n; i++) {
                jstr = ENVPTR->NewStringUTF(ENVPAR strs[i]);
                ENVPTR->SetObjectArrayElement(ENVPAR buf, i, jstr);
                H5free_memory (strs[i]);
            } /* end for */

            /*
            for repeatedly reading a dataset with a large number of strs (e.g., 1,000,000 strings,
            H5Dvlen_reclaim() may crash on Windows because the Java GC will not be able to collect
            free space in time. Instead, use "H5free_memory(strs[i])" above to free individual strings
            after it is done.
            H5Dvlen_reclaim(tid, mem_sid, xfer_plist_id, strs);
            */

            HDfree(strs);
        } /* end else */
    } /* end else */

    return status;
} /* end H5DreadVL_str */


/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5DwriteVL
 * Signature: (JJJJJ[Ljava/lang/String;)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5DwriteVL
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jobjectArray buf)
{
    herr_t  status = -1;
    htri_t  isStr = 0;
    htri_t  isVlenStr = 0;
    htri_t  isComplex = 0;

    if (buf == NULL) {
        h5nullArgument(env, "H5DwriteVL:  buf is NULL");
    } /* end if */
    else {
        isStr = H5Tdetect_class((hid_t)mem_type_id, H5T_STRING);
        if (H5Tget_class((hid_t)mem_type_id) == H5T_COMPOUND) {
            unsigned i;
            int nm = H5Tget_nmembers(mem_type_id);
            for(i = 0; i <nm; i++) {
                hid_t nested_tid = H5Tget_member_type((hid_t)mem_type_id, i);
                isComplex = H5Tdetect_class((hid_t)nested_tid, H5T_COMPOUND) ||
                            H5Tdetect_class((hid_t)nested_tid, H5T_VLEN);
                H5Tclose(nested_tid);
            }
        }
        else if (H5Tget_class((hid_t)mem_type_id) == H5T_VLEN) {
            isVlenStr = 1; /* strings created by H5Tvlen_create(H5T_C_S1) */
        }
        if (isStr == 0 || isComplex>0 || isVlenStr) {
            h5unimplemented(env, "H5DwriteVL: VL types, which are not string type, not implemented");
            status = -1;
#ifdef notdef
            status = H5DwriteVL_asstr(env, (hid_t)dataset_id, (hid_t)mem_type_id,
                                        (hid_t)mem_space_id, (hid_t)file_space_id,
                                        (hid_t)xfer_plist_id, buf);
#endif
        }
        else if (isStr > 0) {
            status = H5DwriteVL_str(env, (hid_t)dataset_id, (hid_t)mem_type_id,
                                        (hid_t)mem_space_id, (hid_t)file_space_id,
                                        (hid_t)xfer_plist_id, buf);
        }
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dwrite_1VL */

herr_t
H5DwriteVL_asstr
    (JNIEnv *env, hid_t did, hid_t tid, hid_t mem_sid, hid_t file_sid, hid_t xfer_plist_id, jobjectArray buf)
{
    herr_t  status = -1;
    hvl_t  *wdata;
    jsize   size;
    jint    i;
    jint    n;

    /* Get size of string array */
    n = ENVPTR->GetArrayLength(ENVPAR buf);
    wdata = (hvl_t*)HDcalloc((size_t)n, sizeof(hvl_t));

    if (wdata == NULL) {
        h5JNIFatalError(env, "H5DwriteVL_asstr:  failed to allocate buff for write");
    } /* end if */
    else {
        for (i = 0; i < n; ++i) {
            jstring obj = (jstring) ENVPTR->GetObjectArrayElement(ENVPAR (jobjectArray)buf, i);
            if (obj != 0) {
                jsize length = ENVPTR->GetStringUTFLength(ENVPAR obj);
                const char *utf8 = ENVPTR->GetStringUTFChars(ENVPAR obj, 0);

                if (utf8) {
                    h5str_vlconvert(utf8, did, tid, wdata+i, 0);
                } /* end if */

                ENVPTR->ReleaseStringUTFChars(ENVPAR obj, utf8);
                ENVPTR->DeleteLocalRef(ENVPAR obj);
            } /* end if */
        } /* end for (i = 0; i < size; ++i) */

        status = H5Dwrite(did, tid, mem_sid, file_sid, xfer_plist_id, wdata);

        /* now free memory*/
        for (i = 0; i < n; i++) {
            if(wdata+i) {
                HDfree(wdata+i);
            } /* end if */
        } /* end for */
        HDfree(wdata);

        if (status < 0)
            h5libraryError(env);
    } /* end else */

    return status;
} /* end H5DwriteVL_asstr */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dwrite_VLStrings
 * Signature: (JJJJJ[Ljava/lang/String;)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dwrite_1VLStrings
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
          jlong file_space_id, jlong xfer_plist_id, jobjectArray buf)
{
    herr_t  status = -1;
    htri_t  isVlenStr=0;

    if (buf == NULL) {
        h5nullArgument(env, "H5Dwrite_VLStrings:  buf is NULL");
    } /* end if */
    else {
        isVlenStr = H5Tis_variable_str((hid_t)mem_type_id);

        if (isVlenStr) {
            status = H5DwriteVL_str(env, (hid_t)dataset_id, (hid_t)mem_type_id,
                                        (hid_t)mem_space_id, (hid_t)file_space_id,
                                        (hid_t)xfer_plist_id, buf);
        } /* end if */
        else
            h5badArgument(env, "H5Dwrite_VLStrings: type is not variable length String");
    } /* end else */

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dwrite_1VLStrings */

herr_t
H5DwriteVL_str
    (JNIEnv *env, hid_t dataset_id, hid_t mem_type_id, hid_t mem_space_id, hid_t file_space_id, hid_t xfer_plist_id, jobjectArray buf)
{
    herr_t  status = -1;
    char  **wdata;
    jsize   size;
    jsize    i;

    size = ENVPTR->GetArrayLength(ENVPAR (jarray) buf);
    wdata = (char**)HDmalloc((size_t)size * sizeof (char*));

    if (!wdata) {
        h5JNIFatalError(env, "H5DwriteVL_str:  cannot allocate buffer");
    } /* end if */
    else {
        HDmemset(wdata, 0, (size_t)size * sizeof(char*));
        for (i = 0; i < size; ++i) {
            jstring obj = (jstring) ENVPTR->GetObjectArrayElement(ENVPAR (jobjectArray)buf, i);
            if (obj != 0) {
                jsize length = ENVPTR->GetStringUTFLength(ENVPAR obj);
                const char *utf8 = ENVPTR->GetStringUTFChars(ENVPAR obj, 0);

                if (utf8) {
                    wdata[i] = (char*)HDmalloc((size_t)length + 1);
                    if (wdata[i]) {
                        HDmemset(wdata[i], 0, (size_t)length + 1);
                        HDstrncpy(wdata[i], utf8, (size_t)length + 1);
                    } /* end if */
                } /* end if */

                ENVPTR->ReleaseStringUTFChars(ENVPAR obj, utf8);
                ENVPTR->DeleteLocalRef(ENVPAR obj);
            } /* end if */
        } /* end for (i = 0; i < size; ++i) */

        status = H5Dwrite(dataset_id, mem_type_id, mem_space_id, file_space_id, xfer_plist_id, wdata);

        /* now free memory*/
        for (i = 0; i < size; i++) {
            if(wdata[i]) {
                HDfree(wdata[i]);
            } /* end if */
        } /* end for */
        HDfree(wdata);

        if (status < 0)
            h5libraryError(env);
    } /* end else */

    return status;
} /* end H5DwriteVL_str */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dread_reg_ref
 * Signature: (JJJJJ[Ljava/lang/String;)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dread_1reg_1ref
    (JNIEnv *env, jclass clss,
        jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
        jlong file_space_id, jlong xfer_plist_id, jobjectArray buf)
{
    herr_t    status = -1;
    h5str_t   h5str;
    size_t    size;
    hdset_reg_ref_t *ref_data;
    jint      i;
    jint      n;
    jstring   jstr;

    hid_t region = -1;
    hid_t did = (hid_t) dataset_id;
    hid_t tid = (hid_t) mem_type_id;
    hid_t mem_sid = (hid_t) mem_space_id;
    hid_t file_sid = (hid_t) file_space_id;

    n = ENVPTR->GetArrayLength(ENVPAR buf);
    size = sizeof(hdset_reg_ref_t); /*H5Tget_size(tid);*/
    ref_data = (hdset_reg_ref_t*)HDmalloc(size * (size_t)n);

    if (ref_data == NULL) {
        h5JNIFatalError(env, "H5Dread_reg_ref:  failed to allocate buff for read");
        return -1;
    } /* end if */

    status = H5Dread(did, tid, mem_sid, file_sid, xfer_plist_id, ref_data);

    if (status < 0) {
        HDfree(ref_data);
        h5JNIFatalError(env, "H5Dread_reg_ref: failed to read data");
        return -1;
    } /* end if */

    HDmemset(&h5str, 0, sizeof(h5str_t));
    h5str_new(&h5str, 1024);
    for (i=0; i<n; i++) {
        h5str.s[0] = '\0';
        h5str_sprintf(&h5str, did, tid, ref_data[i], 0, 0);
        jstr = ENVPTR->NewStringUTF(ENVPAR h5str.s);

        ENVPTR->SetObjectArrayElement(ENVPAR buf, i, jstr);
    } /* end for */

    h5str_free(&h5str);
    HDfree(ref_data);

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dread_1reg_1ref */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dread_reg_ref_data
 * Signature: (JJJJJ[Ljava/lang/String;)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dread_1reg_1ref_1data
    (JNIEnv *env, jclass clss,
        jlong dataset_id, jlong mem_type_id, jlong mem_space_id,
        jlong file_space_id, jlong xfer_plist_id, jobjectArray buf)
{
    herr_t    status = -1;
    h5str_t   h5str;
    size_t    size;
    hdset_reg_ref_t *ref_data;
    jint      i;
    jint      n;
    jstring   jstr;

    hid_t        region_obj;
    H5S_sel_type region_type;

    hid_t region = -1;
    hid_t did = (hid_t) dataset_id;
    hid_t tid = (hid_t) mem_type_id;
    hid_t mem_sid = (hid_t) mem_space_id;
    hid_t file_sid = (hid_t) file_space_id;

    n = ENVPTR->GetArrayLength(ENVPAR buf);
    size = sizeof(hdset_reg_ref_t); /*H5Tget_size(tid);*/
    ref_data = (hdset_reg_ref_t*)HDmalloc(size * (size_t)n);

    if (ref_data == NULL) {
        h5JNIFatalError(env, "H5Dread_reg_ref_data:  failed to allocate buff for read");
        return -1;
    } /* end if */

    status = H5Dread(did, tid, mem_sid, file_sid, xfer_plist_id, ref_data);

    if (status < 0) {
        HDfree(ref_data);
        h5JNIFatalError(env, "H5Dread_reg_ref_data: failed to read data");
        return -1;
    } /* end if */

    HDmemset(&h5str, 0, sizeof(h5str_t));
    h5str_new(&h5str, 1024);
    for (i=0; i<n; i++) {
        h5str.s[0] = '\0';

        /* get name of the dataset the region reference points to using H5Rget_name */
        region_obj = H5Rdereference2(did, H5P_DEFAULT, H5R_DATASET_REGION, ref_data[i]);
        if (region_obj >= 0) {
            region = H5Rget_region(did, H5R_DATASET_REGION, ref_data[i]);
            if (region >= 0) {
                region_type = H5Sget_select_type(region);
                if(region_type==H5S_SEL_POINTS) {
                    h5str_dump_region_points_data(&h5str, region, region_obj);
                } /* end if */
                else {
                    h5str_dump_region_blocks_data(&h5str, region, region_obj);
                } /* end else */

                H5Sclose(region);
            } /* end if */
            H5Dclose(region_obj);
        } /* end if */
        jstr = ENVPTR->NewStringUTF(ENVPAR h5str.s);

        ENVPTR->SetObjectArrayElement(ENVPAR buf, i, jstr);
    } /* end for */

    h5str_free(&h5str);
    HDfree(ref_data);

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Dread_1reg_1ref_1data */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    _H5Dcreate2
 * Signature: (JLjava/lang/String;JJJJJ)J
 */
JNIEXPORT jlong JNICALL
Java_hdf_hdf5lib_H5__1H5Dcreate2
    (JNIEnv *env, jclass clss, jlong loc_id, jstring name, jlong type_id,
          jlong space_id, jlong link_plist_id, jlong create_plist_id, jlong access_plist_id)
{
    hid_t       dset_id = -1;
    const char *fileName;

    PIN_JAVA_STRING(name, fileName);
    if (fileName != NULL) {
        dset_id = H5Dcreate2((hid_t)loc_id, fileName, (hid_t)type_id, (hid_t)space_id, (hid_t)link_plist_id, (hid_t)create_plist_id, (hid_t)access_plist_id);

        UNPIN_JAVA_STRING(name, fileName);
        if (dset_id < 0)
            h5libraryError(env);
    }

    return (jlong)dset_id;
} /* end Java_hdf_hdf5lib_H5__1H5Dcreate2 */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    _H5Dopen2
 * Signature: (JLjava/lang/String;J)J
 */
JNIEXPORT jlong JNICALL
Java_hdf_hdf5lib_H5__1H5Dopen2
    (JNIEnv *env, jclass clss, jlong loc_id, jstring name, jlong access_plist)
{
    hid_t       dset_id = -1;
    const char *fileName;

    PIN_JAVA_STRING(name, fileName);
    if (fileName != NULL) {
        dset_id = H5Dopen2((hid_t)loc_id, fileName, (hid_t)access_plist);

        UNPIN_JAVA_STRING(name, fileName);
        if (dset_id < 0)
            h5libraryError(env);
    }

    return (jlong)dset_id;
} /* end Java_hdf_hdf5lib_H5__1H5Dopen2 */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    _H5Dcreate_anon
 * Signature: (JJJJJ)J
 */
JNIEXPORT jlong JNICALL
Java_hdf_hdf5lib_H5__1H5Dcreate_1anon
    (JNIEnv *env, jclass clss, jlong loc_id, jlong type_id, jlong space_id, jlong dcpl_id, jlong dapl_id)
{
    hid_t dset_id = -1;

    dset_id = H5Dcreate_anon((hid_t)loc_id, (hid_t)type_id, (hid_t)space_id, (hid_t)dcpl_id, (hid_t)dapl_id);
    if (dset_id < 0)
        h5libraryError(env);

    return (jlong)dset_id;
} /* end Java_hdf_hdf5lib_H5__1H5Dcreate_1anon */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dget_space_status
 * Signature: (J)I;
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Dget_1space_1status
    (JNIEnv *env, jclass clss, jlong loc_id)
{
    H5D_space_status_t space_status = H5D_SPACE_STATUS_ERROR;

    if (H5Dget_space_status((hid_t)loc_id, &space_status) < 0)
        h5libraryError(env);

    return (jint)space_status;
} /* end Java_hdf_hdf5lib_H5_H5Dget_1space_1status */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dget_access_plist
 * Signature: (J)J
 */
JNIEXPORT jlong JNICALL
Java_hdf_hdf5lib_H5_H5Dget_1access_1plist
    (JNIEnv *env, jclass clss, jlong loc_id)
{
    hid_t retVal = -1;

    retVal = H5Dget_access_plist((hid_t)loc_id);
    if (retVal < 0)
        h5libraryError(env);

    return (jlong)retVal;
} /* end Java_hdf_hdf5lib_H5_H5Dget_1access_1plist */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dget_offset
 * Signature: (J)J
 */
JNIEXPORT jlong JNICALL
Java_hdf_hdf5lib_H5_H5Dget_1offset
    (JNIEnv *env, jclass clss, jlong loc_id)
{
    haddr_t offset = HADDR_UNDEF;

    offset = H5Dget_offset((hid_t)loc_id);
    if (offset == HADDR_UNDEF)
        h5libraryError(env);

    return (jlong)offset;
} /* end Java_hdf_hdf5lib_H5_H5Dget_1offset */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dvlen_get_buf_size
 * Signature: (JJJ)J
 */
JNIEXPORT jlong JNICALL
Java_hdf_hdf5lib_H5_H5Dvlen_1get_1buf_1size
    (JNIEnv *env, jclass clss, jlong dataset_id, jlong type_id, jlong space_id)
{
  hsize_t sz = 0;

  if (H5Dvlen_get_buf_size((hid_t)dataset_id, (hid_t)type_id, (hid_t)space_id, &sz) < 0)
      h5libraryError(env);

  return (jlong)sz;
} /* end Java_hdf_hdf5lib_H5_H5Dvlen_1get_1buf_1size_1long */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dfill
 * Signature: ([BJ[BJJ)V
 */
JNIEXPORT void JNICALL
Java_hdf_hdf5lib_H5_H5Dfill
    (JNIEnv *env, jclass clss, jbyteArray fill, jlong fill_type_id, jbyteArray buf, jlong buf_type_id, jlong space_id)
{
    herr_t    status;
    jbyte    *fillP;
    jbyte    *buffP;
    jboolean  isCopy1;
    jboolean  isCopy2;


    if (buf == NULL) {
        h5nullArgument(env, "H5Dfill:  buf is NULL");
    } /* end if */
    else {
        buffP = ENVPTR->GetByteArrayElements(ENVPAR buf, &isCopy2);
        if (buffP == NULL) {
            h5JNIFatalError(env, "H5Dfill:  buf not pinned");
        } /* end if */
        else {
            if(fill) {
                fillP = ENVPTR->GetByteArrayElements(ENVPAR fill, &isCopy1);
                if (fillP == NULL) {
                    ENVPTR->ReleaseByteArrayElements(ENVPAR buf, buffP, JNI_ABORT);
                    h5JNIFatalError( env, "H5Dfill:  fill not pinned");
                    return;
                } /* end if */
            } /* end if */
            else
                fillP = NULL;

            status = H5Dfill((const void*)fillP, (hid_t)fill_type_id, (void*)buffP, (hid_t)buf_type_id, (hid_t)space_id);
            if(fillP) {
                /* free the buffer without copying back */
                ENVPTR->ReleaseByteArrayElements(ENVPAR fill, fillP, JNI_ABORT);
            } /* end if */
            if (status < 0) {
                ENVPTR->ReleaseByteArrayElements(ENVPAR buf, buffP, JNI_ABORT);
                h5libraryError(env);
            } /* end if */
            else {
                if (isCopy2 == JNI_TRUE) {
                    ENVPTR->ReleaseByteArrayElements(ENVPAR buf, buffP, 0);
                } /* end if */
            } /* end else */
        }
    }
} /* end Java_hdf_hdf5lib_H5_H5Dfill */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dset_extent
 * Signature: (J[J)V
 */
JNIEXPORT void JNICALL
Java_hdf_hdf5lib_H5_H5Dset_1extent
    (JNIEnv *env, jclass clss, jlong loc_id, jlongArray buf)
{
    herr_t    status;
    hsize_t  *dims;
    jlong    *buffP;
    jsize     rank;
    jboolean  isCopy;
    int       i = 0;

    if (buf == NULL) {
        h5nullArgument(env, "H5Dset_extent:  buf is NULL");
    } /* end if */
    else {
        rank = ENVPTR->GetArrayLength(ENVPAR buf);
        if (rank <= 0) {
            h5JNIFatalError(env, "H5Dset_extent:  rank <=0");
        } /* end if */
        else {
            buffP = ENVPTR->GetLongArrayElements(ENVPAR buf, &isCopy);
            if (buffP == NULL) {
                h5JNIFatalError( env, "H5Dset_extent:  buf not pinned");
            } /* end if */
            else {
                dims = (hsize_t*)HDmalloc((size_t)rank * sizeof(hsize_t));
                for (i = 0; i< rank; i++)
                    dims[i] = (hsize_t)buffP[i];

                status = H5Dset_extent((hid_t)loc_id, (hsize_t*)dims);

                HDfree (dims);

                /* free the buffer without copying back */
                ENVPTR->ReleaseLongArrayElements(ENVPAR buf, buffP, JNI_ABORT);

                if (status < 0) {
                    h5libraryError(env);
                } /* end if */
            } /* end else */
        } /* end else */
    }
} /* end Java_hdf_hdf5lib_H5_H5Dset_1extent */

static herr_t
H5D_iterate_cb
    (void* elem, hid_t elem_id, unsigned ndim, const hsize_t *point, void *op_data) {
    JNIEnv    *cbenv;
    jint       status;
    jclass     cls;
    jmethodID  mid;
    jbyteArray elemArray;
    jlongArray pointArray;
    jsize      size;

    if(JVMPTR->AttachCurrentThread(JVMPAR2 (void**)&cbenv, NULL) != 0) {
        JVMPTR->DetachCurrentThread(JVMPAR);
        return -1;
    } /* end if */
    cls = CBENVPTR->GetObjectClass(CBENVPAR visit_callback);
    if (cls == 0) {
       JVMPTR->DetachCurrentThread(JVMPAR);
       return -1;
    } /* end if */
    mid = CBENVPTR->GetMethodID(CBENVPAR cls, "callback", "([BJI[JLhdf/hdf5lib/callbacks/H5D_iterate_t;)I");
    if (mid == 0) {
        JVMPTR->DetachCurrentThread(JVMPAR);
        return -1;
    } /* end if */

    if (elem == NULL) {
        JVMPTR->DetachCurrentThread(JVMPAR);
        return -1;
    } /* end if */
    if (point == NULL) {
        JVMPTR->DetachCurrentThread(JVMPAR);
        return -1;
    } /* end if */

    size = (jsize)H5Tget_size(elem_id);
    elemArray = CBENVPTR->NewByteArray(CBENVPAR size);
    if (elemArray == NULL) {
        JVMPTR->DetachCurrentThread(JVMPAR);
        return -1;
    } /* end if */
    CBENVPTR->SetByteArrayRegion(CBENVPAR elemArray, 0, size, (jbyte *)elem);

    pointArray = CBENVPTR->NewLongArray(CBENVPAR 2);
    if (pointArray == NULL) {
        JVMPTR->DetachCurrentThread(JVMPAR);
        return -1;
    } /* end if */
    CBENVPTR->SetLongArrayRegion(CBENVPAR pointArray, 0, 2, (const jlong *)point);

    status = CBENVPTR->CallIntMethod(CBENVPAR visit_callback, mid, (void*)elemArray, elem_id, ndim, pointArray, op_data);

    CBENVPTR->GetByteArrayRegion(CBENVPAR elemArray, 0, size, (jbyte *)elem);

    JVMPTR->DetachCurrentThread(JVMPAR);

    return status;
} /* end H5D_iterate_cb */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Diterate
 * Signature: ([BJJLjava/lang/Object;Ljava/lang/Object;)I
 */
JNIEXPORT jint JNICALL
Java_hdf_hdf5lib_H5_H5Diterate
    (JNIEnv *env, jclass clss, jbyteArray buf, jlong buf_type, jlong space,
          jobject callback_op, jobject op_data)
{
    herr_t        status = -1;
    jboolean      isCopy;
    jbyte        *buffP;

    ENVPTR->GetJavaVM(ENVPAR &jvm);
    visit_callback = callback_op;

    if (op_data == NULL) {
        h5nullArgument(env,  "H5Diterate:  op_data is NULL");
    } /* end if */
    else if (callback_op == NULL) {
        h5nullArgument(env,  "H5Diterate:  callback_op is NULL");
    } /* end if */
    else if (buf == NULL) {
        h5nullArgument(env,  "H5Diterate:  buf is NULL");
    } /* end if */
    else {
        buffP = ENVPTR->GetByteArrayElements(ENVPAR buf, &isCopy);
        if (buffP == NULL) {
            h5JNIFatalError(env, "H5Diterate:  buf not pinned");
        } /* end if */
        else {
            status = H5Diterate((void*)buffP, (hid_t)buf_type, (hid_t)space, (H5D_operator_t)H5D_iterate_cb, (void*)op_data);

            if (status < 0) {
            ENVPTR->ReleaseByteArrayElements(ENVPAR buf, buffP, JNI_ABORT);
            h5libraryError(env);
            } /* end if */
            else {
                if (isCopy == JNI_TRUE) {
                    ENVPTR->ReleaseByteArrayElements(ENVPAR buf, buffP, 0);
                } /* end if */
            } /* end else */
        } /* end else */
    }

    return (jint)status;
} /* end Java_hdf_hdf5lib_H5_H5Diterate */

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Dflush
 * Signature: (J)V
 */
JNIEXPORT void JNICALL
Java_hdf_hdf5lib_H5_H5Dflush
    (JNIEnv *env, jclass clss, jlong loc_id)
{
    if (H5Dflush((hid_t)loc_id) < 0)
        h5libraryError(env);
}

/*
 * Class:     hdf_hdf5lib_H5
 * Method:    H5Drefresh
 * Signature: (J)V
 */
JNIEXPORT void JNICALL
Java_hdf_hdf5lib_H5_H5Drefresh
    (JNIEnv *env, jclass clss, jlong loc_id)
{
    if (H5Drefresh((hid_t)loc_id) < 0)
        h5libraryError(env);
}



#ifdef __cplusplus
} /* end extern "C" */
#endif /* __cplusplus */
