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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1997, 1998, 1999, 2000
* Sleepycat Software. All rights reserved.
*/
#include "db_config.h"
#ifndef lint
static const char revid[] = "$Id: java_Dbt.c,v 11.10 2000/10/25 19:54:55 dda Exp $";
#endif /* not lint */
#include <jni.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "db.h"
#include "java_util.h"
#include "com_sleepycat_db_Dbt.h"
JAVADB_RW_ACCESS(Dbt, jint, size, DBT, size)
JAVADB_RW_ACCESS(Dbt, jint, ulen, DBT, ulen)
JAVADB_RW_ACCESS(Dbt, jint, dlen, DBT, dlen)
JAVADB_RW_ACCESS(Dbt, jint, doff, DBT, doff)
JAVADB_RW_ACCESS(Dbt, jint, flags, DBT, flags)
JNIEXPORT void JNICALL Java_com_sleepycat_db_Dbt_init
(JNIEnv *jnienv, jobject jthis)
{
DBT_JAVAINFO *dbtji;
dbtji = dbjit_construct();
set_private_dbobj(jnienv, name_DBT, jthis, dbtji);
}
JNIEXPORT void JNICALL Java_com_sleepycat_db_Dbt_internal_1set_1data
(JNIEnv *jnienv, jobject jthis, jbyteArray array)
{
DBT_JAVAINFO *db_this;
db_this = get_DBT_JAVAINFO(jnienv, jthis);
if (verify_non_null(jnienv, db_this)) {
/* If we previously allocated an array for java,
* must release reference.
*/
dbjit_release(db_this, jnienv);
/* Make the array a global ref,
* it won't be GC'd till we release it.
*/
if (array)
array = (jbyteArray)NEW_GLOBAL_REF(jnienv, array);
db_this->array_ = array;
}
}
JNIEXPORT jbyteArray JNICALL Java_com_sleepycat_db_Dbt_get_1data
(JNIEnv *jnienv, jobject jthis)
{
DBT_JAVAINFO *db_this;
jbyteArray arr;
int len;
db_this = get_DBT_JAVAINFO(jnienv, jthis);
if (verify_non_null(jnienv, db_this)) {
/* XXX this will copy the data on each call to get_data,
* even if it is unchanged.
*/
if (db_this->create_array_ != 0) {
/* XXX we should reuse the existing array if we can */
len = db_this->dbt.size;
if (db_this->array_ != NULL)
DELETE_GLOBAL_REF(jnienv, db_this->array_);
arr = (*jnienv)->NewByteArray(jnienv, len);
db_this->array_ =
(jbyteArray)NEW_GLOBAL_REF(jnienv, arr);
(*jnienv)->SetByteArrayRegion(jnienv, arr, 0, len,
db_this->dbt.data);
}
return (db_this->array_);
}
return (0);
}
JNIEXPORT void JNICALL Java_com_sleepycat_db_Dbt_set_1offset
(JNIEnv *jnienv, jobject jthis, jint offset)
{
DBT_JAVAINFO *db_this;
db_this = get_DBT_JAVAINFO(jnienv, jthis);
if (verify_non_null(jnienv, db_this)) {
db_this->offset_ = offset;
}
}
JNIEXPORT jint JNICALL Java_com_sleepycat_db_Dbt_get_1offset
(JNIEnv *jnienv, jobject jthis)
{
DBT_JAVAINFO *db_this;
db_this = get_DBT_JAVAINFO(jnienv, jthis);
if (verify_non_null(jnienv, db_this)) {
return db_this->offset_;
}
return (0);
}
JNIEXPORT void JNICALL Java_com_sleepycat_db_Dbt_set_1recno_1key_1data(JNIEnv *jnienv, jobject jthis, jint value)
{
JDBT jdbt;
if (jdbt_lock(&jdbt, jnienv, jthis, inOp) != 0)
goto out;
if (!jdbt.dbt->dbt.data ||
jdbt.java_array_len_ < sizeof(db_recno_t)) {
char buf[200];
sprintf(buf, "set_recno_key_data error: %p %p %d %d",
&jdbt.dbt->dbt, jdbt.dbt->dbt.data,
jdbt.dbt->dbt.ulen, sizeof(db_recno_t));
report_exception(jnienv, buf, 0, 0);
}
else {
*(db_recno_t*)(jdbt.dbt->dbt.data) = value;
}
out:
jdbt_unlock(&jdbt, jnienv);
}
JNIEXPORT jint JNICALL Java_com_sleepycat_db_Dbt_get_1recno_1key_1data(JNIEnv *jnienv, jobject jthis)
{
jint ret;
JDBT jdbt;
ret = 0;
/* Although this is kind of like "retrieve", we don't support
* DB_DBT_MALLOC for this operation, so we tell jdbt_lock
* that is not a retrieve.
*/
if (jdbt_lock(&jdbt, jnienv, jthis, inOp) != 0)
goto out;
if (!jdbt.dbt->dbt.data ||
jdbt.java_array_len_ < sizeof(db_recno_t)) {
char buf[200];
sprintf(buf, "get_recno_key_data error: %p %p %d %d",
&jdbt.dbt->dbt, jdbt.dbt->dbt.data,
jdbt.dbt->dbt.ulen, sizeof(db_recno_t));
report_exception(jnienv, buf, 0, 0);
}
else {
ret = *(db_recno_t*)(jdbt.dbt->dbt.data);
}
out:
jdbt_unlock(&jdbt, jnienv);
return (ret);
}
JNIEXPORT void JNICALL Java_com_sleepycat_db_Dbt_finalize
(JNIEnv *jnienv, jobject jthis)
{
DBT_JAVAINFO *dbtji;
dbtji = get_DBT_JAVAINFO(jnienv, jthis);
if (dbtji) {
/* Free any data related to DBT here */
dbjit_release(dbtji, jnienv);
/* Extra paranoia */
memset(dbtji, 0, sizeof(DBT_JAVAINFO));
free(dbtji);
}
}
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