java_info.c
上传用户:tsgydb
上传日期:2007-04-14
资源大小:10674k
文件大小:26k
- /*-
- * 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_info.c,v 11.18 2000/10/28 13:09:39 dda Exp $";
- #endif /* not lint */
- #include <jni.h>
- #include <errno.h>
- #include <stdlib.h>
- #include <string.h>
- #include "db.h"
- #include "db_int.h"
- #include "java_util.h"
- /****************************************************************
- *
- * Callback functions
- *
- */
- static void Db_feedback_callback(DB *db, int opcode, int percent)
- {
- DB_JAVAINFO *dbinfo;
- DB_ASSERT(db != NULL);
- dbinfo = (DB_JAVAINFO *)db->cj_internal;
- dbji_call_feedback(dbinfo, db, dbinfo->jdbref_, opcode, percent);
- }
- static int Db_append_recno_callback(DB *db, DBT *dbt, db_recno_t recno)
- {
- DB_JAVAINFO *dbinfo;
- dbinfo = (DB_JAVAINFO *)db->cj_internal;
- return (dbji_call_append_recno(dbinfo, db, dbinfo->jdbref_, dbt, recno));
- }
- static int Db_bt_compare_callback(DB *db, const DBT *dbt1, const DBT *dbt2)
- {
- DB_JAVAINFO *dbinfo;
- dbinfo = (DB_JAVAINFO *)db->cj_internal;
- return (dbji_call_bt_compare(dbinfo, db, dbinfo->jdbref_, dbt1, dbt2));
- }
- static size_t Db_bt_prefix_callback(DB *db, const DBT *dbt1, const DBT *dbt2)
- {
- DB_JAVAINFO *dbinfo;
- dbinfo = (DB_JAVAINFO *)db->cj_internal;
- return (dbji_call_bt_prefix(dbinfo, db, dbinfo->jdbref_, dbt1, dbt2));
- }
- static int Db_dup_compare_callback(DB *db, const DBT *dbt1, const DBT *dbt2)
- {
- DB_JAVAINFO *dbinfo;
- dbinfo = (DB_JAVAINFO *)db->cj_internal;
- return (dbji_call_dup_compare(dbinfo, db, dbinfo->jdbref_, dbt1, dbt2));
- }
- static u_int32_t Db_h_hash_callback(DB *db, const void *data, u_int32_t len)
- {
- DB_JAVAINFO *dbinfo;
- dbinfo = (DB_JAVAINFO *)db->cj_internal;
- return (dbji_call_h_hash(dbinfo, db, dbinfo->jdbref_, data, len));
- }
- static void DbEnv_feedback_callback(DB_ENV *dbenv, int opcode, int percent)
- {
- DB_ENV_JAVAINFO *dbinfo;
- DB_ASSERT(dbenv != NULL);
- dbinfo = (DB_ENV_JAVAINFO *)dbenv->cj_internal;
- dbjie_call_feedback(dbinfo, dbenv, dbinfo->jenvref_, opcode, percent);
- }
- static int DbEnv_recovery_init_callback(DB_ENV *dbenv)
- {
- DB_ENV_JAVAINFO *dbinfo;
- dbinfo = (DB_ENV_JAVAINFO *)dbenv->cj_internal;
- return (dbjie_call_recovery_init(dbinfo, dbenv, dbinfo->jenvref_));
- }
- static int DbEnv_tx_recover_callback(DB_ENV *dbenv, DBT *dbt,
- DB_LSN *lsn, db_recops recops)
- {
- DB_ENV_JAVAINFO *dbinfo;
- DB_ASSERT(dbenv != NULL);
- dbinfo = (DB_ENV_JAVAINFO *)dbenv->cj_internal;
- return dbjie_call_tx_recover(dbinfo, dbenv, dbinfo->jenvref_, dbt,
- lsn, recops);
- }
- /****************************************************************
- *
- * Implementation of class DBT_javainfo
- *
- */
- DBT_JAVAINFO *
- dbjit_construct()
- {
- DBT_JAVAINFO *dbjit;
- dbjit = (DBT_JAVAINFO *)malloc(sizeof(DBT_JAVAINFO));
- memset(dbjit, 0, sizeof(DBT_JAVAINFO));
- return (dbjit);
- }
- void dbjit_destroy(DBT_JAVAINFO *dbjit)
- {
- /* Sanity check:
- * We cannot delete the global ref because we don't have a JNIEnv.
- */
- if (dbjit->array_ != NULL) {
- fprintf(stderr, "object is not freedn");
- }
- /* Extra paranoia */
- memset(dbjit, 0, sizeof(DB_JAVAINFO));
- free(dbjit);
- }
- void dbjit_release(DBT_JAVAINFO *dbjit, JNIEnv *jnienv)
- {
- if (dbjit->array_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbjit->array_);
- dbjit->array_ = NULL;
- }
- }
- /****************************************************************
- *
- * Implementation of class DB_ENV_JAVAINFO
- *
- */
- /* create/initialize an object */
- DB_ENV_JAVAINFO *
- dbjie_construct(JNIEnv *jnienv,
- jobject default_errcall,
- int is_dbopen)
- {
- DB_ENV_JAVAINFO *dbjie;
- dbjie = (DB_ENV_JAVAINFO *)malloc(sizeof(DB_ENV_JAVAINFO));
- memset(dbjie, 0, sizeof(DB_ENV_JAVAINFO));
- dbjie->is_dbopen_ = is_dbopen;
- if ((*jnienv)->GetJavaVM(jnienv, &dbjie->javavm_) != 0) {
- free(dbjie);
- report_exception(jnienv, "cannot get Java VM", 0, 0);
- return (NULL);
- }
- /* The default error call just prints to the 'System.err'
- * stream. If the user does set_errcall to null, we'll
- * want to have a reference to set it back to.
- *
- * Why do we have always set db_errcall to our own callback?
- * Because it makes the interaction between setting the
- * error prefix, error stream, and user's error callback
- * that much easier.
- */
- dbjie->default_errcall_ = NEW_GLOBAL_REF(jnienv, default_errcall);
- dbjie->errcall_ = NEW_GLOBAL_REF(jnienv, default_errcall);
- return (dbjie);
- }
- /* release all objects held by this this one */
- void dbjie_dealloc(DB_ENV_JAVAINFO *dbjie, JNIEnv *jnienv)
- {
- if (dbjie->recovery_init_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbjie->recovery_init_);
- dbjie->recovery_init_ = NULL;
- }
- if (dbjie->feedback_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbjie->feedback_);
- dbjie->feedback_ = NULL;
- }
- if (dbjie->tx_recover_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbjie->tx_recover_);
- dbjie->tx_recover_ = NULL;
- }
- if (dbjie->errcall_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbjie->errcall_);
- dbjie->errcall_ = NULL;
- }
- if (dbjie->default_errcall_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbjie->default_errcall_);
- dbjie->default_errcall_ = NULL;
- }
- if (dbjie->conflict_ != NULL) {
- free(dbjie->conflict_);
- dbjie->conflict_ = NULL;
- }
- if (dbjie->errpfx_ != NULL) {
- free(dbjie->errpfx_);
- dbjie->errpfx_ = NULL;
- }
- }
- /* free this object, releasing anything allocated on its behalf */
- void dbjie_destroy(DB_ENV_JAVAINFO *dbjie, JNIEnv *jnienv)
- {
- dbjie_dealloc(dbjie, jnienv);
- /* Extra paranoia */
- memset(dbjie, 0, sizeof(DB_ENV_JAVAINFO));
- free(dbjie);
- }
- /* Attach to the current thread that is running and
- * return that. We use the java virtual machine
- * that we saved in the constructor.
- */
- JNIEnv *
- dbjie_get_jnienv(DB_ENV_JAVAINFO *dbjie)
- {
- /* Note:
- * Different versions of the JNI disagree on the signature
- * for AttachCurrentThread. The most recent documentation
- * seems to say that (JNIEnv **) is correct, but newer
- * JNIs seem to use (void **), oddly enough.
- */
- #ifdef JNI_VERSION_1_2
- void *attachret = 0;
- #else
- JNIEnv *attachret = 0;
- #endif
- /* This should always succeed, as we are called via
- * some Java activity. I think therefore I am (a thread).
- */
- if ((*dbjie->javavm_)->AttachCurrentThread(dbjie->javavm_, &attachret, 0) != 0)
- return (0);
- return ((JNIEnv *)attachret);
- }
- jstring
- dbjie_get_errpfx(DB_ENV_JAVAINFO *dbjie, JNIEnv *jnienv)
- {
- return (get_java_string(jnienv, dbjie->errpfx_));
- }
- void
- dbjie_set_errcall(DB_ENV_JAVAINFO *dbjie, JNIEnv *jnienv, jobject new_errcall)
- {
- /* If the new_errcall is null, we'll set the error call
- * to the default one.
- */
- if (new_errcall == NULL)
- new_errcall = dbjie->default_errcall_;
- DELETE_GLOBAL_REF(jnienv, dbjie->errcall_);
- dbjie->errcall_ = NEW_GLOBAL_REF(jnienv, new_errcall);
- }
- void
- dbjie_set_errpfx(DB_ENV_JAVAINFO *dbjie, JNIEnv *jnienv, jstring errpfx)
- {
- if (dbjie->errpfx_ != NULL)
- free(dbjie->errpfx_);
- if (errpfx)
- dbjie->errpfx_ = get_c_string(jnienv, errpfx);
- else
- dbjie->errpfx_ = NULL;
- }
- void
- dbjie_set_conflict(DB_ENV_JAVAINFO *dbjie, unsigned char *newarr)
- {
- if (dbjie->conflict_)
- free(dbjie->conflict_);
- dbjie->conflict_ = newarr;
- }
- void dbjie_set_feedback_object(DB_ENV_JAVAINFO *dbjie, JNIEnv *jnienv,
- DB_ENV *dbenv, jobject jfeedback)
- {
- int err;
- if (dbjie->feedback_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbjie->feedback_);
- }
- if (jfeedback == NULL) {
- if ((err = dbenv->set_feedback(dbenv, NULL)) != 0)
- report_exception(jnienv, "set_feedback failed",
- err, 0);
- }
- else {
- if ((err = dbenv->set_feedback(dbenv,
- DbEnv_feedback_callback)) != 0)
- report_exception(jnienv, "set_feedback failed",
- err, 0);
- }
- dbjie->feedback_ = NEW_GLOBAL_REF(jnienv, jfeedback);
- }
- void dbjie_call_feedback(DB_ENV_JAVAINFO *dbjie, DB_ENV *dbenv, jobject jenv,
- int opcode, int percent)
- {
- JNIEnv *jnienv;
- jclass feedback_class;
- jmethodID id;
- COMPQUIET(dbenv, NULL);
- jnienv = dbjie_get_jnienv(dbjie);
- if (jnienv == NULL) {
- fprintf(stderr, "Cannot attach to current thread!n");
- return;
- }
- feedback_class = get_class(jnienv, name_DbEnvFeedback);
- id = (*jnienv)->GetMethodID(jnienv, feedback_class,
- "feedback",
- "(Lcom/sleepycat/db/DbEnv;II)V");
- if (!id) {
- fprintf(stderr, "Cannot find callback classn");
- return;
- }
- (*jnienv)->CallVoidMethod(jnienv, dbjie->feedback_, id,
- jenv, (jint)opcode, (jint)percent);
- }
- void dbjie_set_recovery_init_object(DB_ENV_JAVAINFO *dbjie,
- JNIEnv *jnienv, DB_ENV *dbenv,
- jobject jrecovery_init)
- {
- int err;
- if (dbjie->recovery_init_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbjie->recovery_init_);
- }
- if (jrecovery_init == NULL) {
- if ((err = dbenv->set_recovery_init(dbenv, NULL)) != 0)
- report_exception(jnienv, "set_recovery_init failed",
- err, 0);
- }
- else {
- if ((err = dbenv->set_recovery_init(dbenv,
- DbEnv_recovery_init_callback)) != 0)
- report_exception(jnienv, "set_recovery_init failed",
- err, 0);
- }
- dbjie->recovery_init_ = NEW_GLOBAL_REF(jnienv, jrecovery_init);
- }
- int dbjie_call_recovery_init(DB_ENV_JAVAINFO *dbjie, DB_ENV *dbenv,
- jobject jenv)
- {
- JNIEnv *jnienv;
- jclass recovery_init_class;
- jmethodID id;
- COMPQUIET(dbenv, NULL);
- jnienv = dbjie_get_jnienv(dbjie);
- if (jnienv == NULL) {
- fprintf(stderr, "Cannot attach to current thread!n");
- return (EINVAL);
- }
- recovery_init_class = get_class(jnienv, name_DbRecoveryInit);
- id = (*jnienv)->GetMethodID(jnienv, recovery_init_class,
- "recovery_init",
- "(Lcom/sleepycat/db/DbEnv;)V");
- if (!id) {
- fprintf(stderr, "Cannot find callback classn");
- return (EINVAL);
- }
- return (*jnienv)->CallIntMethod(jnienv, dbjie->recovery_init_,
- id, jenv);
- }
- void dbjie_set_tx_recover_object(DB_ENV_JAVAINFO *dbjie, JNIEnv *jnienv,
- DB_ENV *dbenv, jobject jtx_recover)
- {
- int err;
- if (dbjie->tx_recover_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbjie->tx_recover_);
- }
- if (jtx_recover == NULL) {
- if ((err = dbenv->set_tx_recover(dbenv, NULL)) != 0)
- report_exception(jnienv, "set_tx_recover failed",
- err, 0);
- }
- else {
- if ((err = dbenv->set_tx_recover(dbenv,
- DbEnv_tx_recover_callback)) != 0)
- report_exception(jnienv, "set_tx_recover failed",
- err, 0);
- }
- dbjie->tx_recover_ = NEW_GLOBAL_REF(jnienv, jtx_recover);
- }
- int dbjie_call_tx_recover(DB_ENV_JAVAINFO *dbjie, DB_ENV *dbenv, jobject jenv,
- DBT *dbt, DB_LSN *lsn, int recops)
- {
- JNIEnv *jnienv;
- jclass tx_recover_class;
- jmethodID id;
- jobject jdbt;
- jobject jlsn;
- COMPQUIET(dbenv, NULL);
- jnienv = dbjie_get_jnienv(dbjie);
- if (jnienv == NULL) {
- fprintf(stderr, "Cannot attach to current thread!n");
- return (0);
- }
- tx_recover_class = get_class(jnienv, name_DbTxnRecover);
- id = (*jnienv)->GetMethodID(jnienv, tx_recover_class,
- "tx_recover",
- "(Lcom/sleepycat/db/DbEnv;"
- "Lcom/sleepycat/db/Dbt;"
- "Lcom/sleepycat/db/DbLsn;"
- "I)I");
- if (!id) {
- fprintf(stderr, "Cannot find callback classn");
- return (0);
- }
- if (dbt == NULL)
- jdbt = NULL;
- else
- jdbt = get_Dbt(jnienv, dbt);
- if (lsn == NULL)
- jlsn = NULL;
- else
- jlsn = get_DbLsn(jnienv, *lsn);
- return (*jnienv)->CallIntMethod(jnienv, dbjie->tx_recover_, id, jenv,
- jdbt, jlsn, recops);
- }
- jobject dbjie_get_errcall(DB_ENV_JAVAINFO *dbjie)
- {
- return (dbjie->errcall_);
- }
- int dbjie_is_dbopen(DB_ENV_JAVAINFO *dbjie)
- {
- return (dbjie->is_dbopen_);
- }
- /****************************************************************
- *
- * Implementation of class DB_JAVAINFO
- *
- */
- DB_JAVAINFO *dbji_construct(JNIEnv *jnienv, jint flags)
- {
- DB_JAVAINFO *dbji;
- dbji = (DB_JAVAINFO *)malloc(sizeof(DB_JAVAINFO));
- memset(dbji, 0, sizeof(DB_JAVAINFO));
- if ((*jnienv)->GetJavaVM(jnienv, &dbji->javavm_) != 0) {
- report_exception(jnienv, "cannot get Java VM", 0, 0);
- free(dbji);
- return (NULL);
- }
- dbji->construct_flags_ = flags;
- return (dbji);
- }
- void
- dbji_dealloc(DB_JAVAINFO *dbji, JNIEnv *jnienv)
- {
- if (dbji->append_recno_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbji->append_recno_);
- dbji->append_recno_ = NULL;
- }
- if (dbji->bt_compare_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbji->bt_compare_);
- dbji->bt_compare_ = NULL;
- }
- if (dbji->bt_prefix_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbji->bt_prefix_);
- dbji->bt_prefix_ = NULL;
- }
- if (dbji->dup_compare_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbji->dup_compare_);
- dbji->dup_compare_ = NULL;
- }
- if (dbji->feedback_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbji->feedback_);
- dbji->feedback_ = NULL;
- }
- if (dbji->h_hash_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbji->h_hash_);
- dbji->h_hash_ = NULL;
- }
- }
- void
- dbji_destroy(DB_JAVAINFO *dbji, JNIEnv *jnienv)
- {
- dbji_dealloc(dbji, jnienv);
- free(dbji);
- }
- JNIEnv *dbji_get_jnienv(DB_JAVAINFO *dbji)
- {
- /* Note:
- * Different versions of the JNI disagree on the signature
- * for AttachCurrentThread. The most recent documentation
- * seems to say that (JNIEnv **) is correct, but newer
- * JNIs seem to use (void **), oddly enough.
- */
- #ifdef JNI_VERSION_1_2
- void *attachret = 0;
- #else
- JNIEnv *attachret = 0;
- #endif
- /* This should always succeed, as we are called via
- * some Java activity. I think therefore I am (a thread).
- */
- if ((*dbji->javavm_)->AttachCurrentThread(dbji->javavm_, &attachret, 0) != 0)
- return (0);
- return ((JNIEnv *)attachret);
- }
- jint dbji_get_flags(DB_JAVAINFO *dbji)
- {
- return (dbji->construct_flags_);
- }
- void dbji_set_feedback_object(DB_JAVAINFO *dbji, JNIEnv *jnienv,
- DB *db, jobject jfeedback)
- {
- jclass feedback_class;
- if (dbji->feedback_method_id_ == NULL) {
- feedback_class = get_class(jnienv, name_DbFeedback);
- dbji->feedback_method_id_ =
- (*jnienv)->GetMethodID(jnienv, feedback_class,
- "feedback",
- "(Lcom/sleepycat/db/Db;II)V");
- if (dbji->feedback_method_id_ != NULL) {
- /* XXX
- * We should really have a better way
- * to translate this to a Java exception class.
- * In theory, it shouldn't happen.
- */
- report_exception(jnienv, "Cannot find callback method",
- EFAULT, 0);
- return;
- }
- }
- if (dbji->feedback_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbji->feedback_);
- }
- if (jfeedback == NULL) {
- db->set_feedback(db, NULL);
- }
- else {
- db->set_feedback(db, Db_feedback_callback);
- }
- dbji->feedback_ = NEW_GLOBAL_REF(jnienv, jfeedback);
- }
- void dbji_call_feedback(DB_JAVAINFO *dbji, DB *db, jobject jdb,
- int opcode, int percent)
- {
- JNIEnv *jnienv;
- COMPQUIET(db, NULL);
- jnienv = dbji_get_jnienv(dbji);
- if (jnienv == NULL) {
- fprintf(stderr, "Cannot attach to current thread!n");
- return;
- }
- DB_ASSERT(dbji->feedback_method_id_ != NULL);
- (*jnienv)->CallVoidMethod(jnienv, dbji->feedback_,
- dbji->feedback_method_id_,
- jdb, (jint)opcode, (jint)percent);
- }
- void dbji_set_append_recno_object(DB_JAVAINFO *dbji, JNIEnv *jnienv,
- DB *db, jobject jcallback)
- {
- jclass append_recno_class;
- if (dbji->append_recno_method_id_ == NULL) {
- append_recno_class = get_class(jnienv, name_DbAppendRecno);
- dbji->append_recno_method_id_ =
- (*jnienv)->GetMethodID(jnienv, append_recno_class,
- "db_append_recno",
- "(Lcom/sleepycat/db/Db;"
- "Lcom/sleepycat/db/Dbt;I)V");
- if (dbji->append_recno_method_id_ == NULL) {
- /* XXX
- * We should really have a better way
- * to translate this to a Java exception class.
- * In theory, it shouldn't happen.
- */
- report_exception(jnienv, "Cannot find callback method",
- EFAULT, 0);
- return;
- }
- }
- if (dbji->append_recno_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbji->append_recno_);
- }
- if (jcallback == NULL) {
- db->set_append_recno(db, NULL);
- }
- else {
- db->set_append_recno(db, Db_append_recno_callback);
- }
- dbji->append_recno_ = NEW_GLOBAL_REF(jnienv, jcallback);
- }
- extern int dbji_call_append_recno(DB_JAVAINFO *dbji, DB *db, jobject jdb,
- DBT *dbt, jint recno)
- {
- JNIEnv *jnienv;
- jobject jdbt;
- DBT_JAVAINFO *dbtji;
- jbyteArray arr;
- unsigned int arraylen;
- unsigned char *data;
- COMPQUIET(db, NULL);
- jnienv = dbji_get_jnienv(dbji);
- if (jnienv == NULL) {
- fprintf(stderr, "Cannot attach to current thread!n");
- return (0);
- }
- /* XXX
- * We should have a pool of Dbt objects used for this purpose
- * instead of creating new ones each time. Because of
- * multithreading, we may need an arbitrary number (more than two).
- * We might also have a byte arrays that grow as needed,
- * so we don't need to allocate those either.
- *
- * Note, we do not set the 'create_array_' flag as on other
- * callbacks as we are creating the array here.
- */
- jdbt = create_default_object(jnienv, name_DBT);
- dbtji = get_DBT_JAVAINFO(jnienv, jdbt);
- memcpy(&dbtji->dbt, dbt, sizeof(DBT));
- dbtji->dbt.data = NULL;
- arr = (*jnienv)->NewByteArray(jnienv, dbt->size);
- (*jnienv)->SetByteArrayRegion(jnienv, arr, 0, dbt->size,
- (jbyte *)dbt->data);
- dbtji->array_ = (jbyteArray)NEW_GLOBAL_REF(jnienv, arr);
- DB_ASSERT(dbji->append_recno_method_id_ != NULL);
- (*jnienv)->CallVoidMethod(jnienv, dbji->append_recno_,
- dbji->append_recno_method_id_,
- jdb, jdbt, recno);
- /* The underlying C API requires that an errno be returned
- * on error. Java users know nothing of errnos, so we
- * allow them to throw exceptions instead. We leave the
- * exception in place and return DB_JAVA_CALLBACK to the C API
- * that called us. Eventually the DB->get will fail and
- * when java prepares to throw an exception in
- * report_exception(), this will be spotted as a special case,
- * and the original exception will be preserved.
- *
- * Note: we have sometimes noticed strange behavior with
- * exceptions under Linux 1.1.7 JVM. (i.e. multiple calls
- * to ExceptionOccurred() may report different results).
- * Currently we don't know of any problems related to this
- * in our code, but if it pops up in the future, users are
- * encouranged to get a more recent JVM.
- */
- if ((*jnienv)->ExceptionOccurred(jnienv) != NULL)
- return (DB_JAVA_CALLBACK);
- if (dbtji->array_ == NULL) {
- report_exception(jnienv, "Dbt.data is null", 0, 0);
- return (EFAULT);
- }
- arraylen = (*jnienv)->GetArrayLength(jnienv, dbtji->array_);
- if (dbtji->offset_ < 0 ) {
- report_exception(jnienv, "Dbt.offset illegal", 0, 0);
- return (EFAULT);
- }
- if (dbt->ulen + dbtji->offset_ > arraylen) {
- report_exception(jnienv,
- "Dbt.ulen + Dbt.offset greater than array length", 0, 0);
- return (EFAULT);
- }
- data = (*jnienv)->GetByteArrayElements(jnienv, dbtji->array_,
- (jboolean *)0);
- dbt->data = data + dbtji->offset_;
- return (0);
- }
- void dbji_set_bt_compare_object(DB_JAVAINFO *dbji, JNIEnv *jnienv,
- DB *db, jobject jcompare)
- {
- jclass bt_compare_class;
- if (dbji->bt_compare_method_id_ == NULL) {
- bt_compare_class = get_class(jnienv, name_DbBtreeCompare);
- dbji->bt_compare_method_id_ =
- (*jnienv)->GetMethodID(jnienv, bt_compare_class,
- "bt_compare",
- "(Lcom/sleepycat/db/Db;"
- "Lcom/sleepycat/db/Dbt;"
- "Lcom/sleepycat/db/Dbt;)I");
- if (dbji->bt_compare_method_id_ == NULL) {
- /* XXX
- * We should really have a better way
- * to translate this to a Java exception class.
- * In theory, it shouldn't happen.
- */
- report_exception(jnienv, "Cannot find callback method",
- EFAULT, 0);
- return;
- }
- }
- if (dbji->bt_compare_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbji->bt_compare_);
- }
- if (jcompare == NULL) {
- db->set_bt_compare(db, NULL);
- }
- else {
- db->set_bt_compare(db, Db_bt_compare_callback);
- }
- dbji->bt_compare_ = NEW_GLOBAL_REF(jnienv, jcompare);
- }
- int dbji_call_bt_compare(DB_JAVAINFO *dbji, DB *db, jobject jdb,
- const DBT *dbt1, const DBT *dbt2)
- {
- JNIEnv *jnienv;
- jobject jdbt1, jdbt2;
- DBT_JAVAINFO *dbtji1, *dbtji2;
- COMPQUIET(db, NULL);
- jnienv = dbji_get_jnienv(dbji);
- if (jnienv == NULL) {
- fprintf(stderr, "Cannot attach to current thread!n");
- return (0);
- }
- /* XXX
- * We should have a pool of Dbt objects used for this purpose
- * instead of creating new ones each time. Because of
- * multithreading, we may need an arbitrary number (more than two).
- * We might also have a byte arrays that grow as needed,
- * so we don't need to allocate those either.
- */
- jdbt1 = create_default_object(jnienv, name_DBT);
- jdbt2 = create_default_object(jnienv, name_DBT);
- dbtji1 = get_DBT_JAVAINFO(jnienv, jdbt1);
- memcpy(&dbtji1->dbt, dbt1, sizeof(DBT));
- dbtji1->create_array_ = 1;
- dbtji2 = get_DBT_JAVAINFO(jnienv, jdbt2);
- memcpy(&dbtji2->dbt, dbt2, sizeof(DBT));
- dbtji2->create_array_ = 1;
- DB_ASSERT(dbji->bt_compare_method_id_ != NULL);
- return (*jnienv)->CallIntMethod(jnienv, dbji->bt_compare_,
- dbji->bt_compare_method_id_,
- jdb, jdbt1, jdbt2);
- }
- void dbji_set_bt_prefix_object(DB_JAVAINFO *dbji, JNIEnv *jnienv,
- DB *db, jobject jprefix)
- {
- jclass bt_prefix_class;
- if (dbji->bt_prefix_method_id_ == NULL) {
- bt_prefix_class = get_class(jnienv, name_DbBtreePrefix);
- dbji->bt_prefix_method_id_ =
- (*jnienv)->GetMethodID(jnienv, bt_prefix_class,
- "bt_prefix",
- "(Lcom/sleepycat/db/Db;"
- "Lcom/sleepycat/db/Dbt;"
- "Lcom/sleepycat/db/Dbt;)I");
- if (dbji->bt_prefix_method_id_ == NULL) {
- /* XXX
- * We should really have a better way
- * to translate this to a Java exception class.
- * In theory, it shouldn't happen.
- */
- report_exception(jnienv, "Cannot find callback method",
- EFAULT, 0);
- return;
- }
- }
- if (dbji->bt_prefix_ != NULL) {
- DELETE_GLOBAL_REF(jnienv, dbji->bt_prefix_);
- }
- if (jprefix == NULL) {
- db->set_bt_prefix(db, NULL);
- }
- else {
- db->set_bt_prefix(db, Db_bt_prefix_callback);
- }
- dbji->bt_prefix_ = NEW_GLOBAL_REF(jnienv, jprefix);
- }
- size_t dbji_call_bt_prefix(DB_JAVAINFO *dbji, DB *db, jobject jdb,
- const DBT *dbt1, const DBT *dbt2)
- {
- JNIEnv *jnienv;
- jobject jdbt1, jdbt2;
- DBT_JAVAINFO *dbtji1, *dbtji2;
- COMPQUIET(db, NULL);
- jnienv = dbji_get_jnienv(dbji);
- if (jnienv == NULL) {
- fprintf(stderr, "Cannot attach to current thread!n");
- return (0);
- }
- /* XXX
- * We should have a pool of Dbt objects used for this purpose
- * instead of creating new ones each time. Because of
- * multithreading, we may need an arbitrary number (more than two).
- * We might also have a byte arrays that grow as needed,
- * so we don't need to allocate those either.
- */
- jdbt1 = create_default_object(jnienv, name_DBT);
- jdbt2 = create_default_object(jnienv, name_DBT);
- dbtji1 = get_DBT_JAVAINFO(jnienv, jdbt1);
- memcpy(&dbtji1->dbt, dbt1, sizeof(DBT));
- dbtji1->create_array_ = 1;
- dbtji2 = get_DBT_JAVAINFO(jnienv, jdbt2);
- memcpy(&dbtji2->dbt, dbt2, sizeof(DBT));
- dbtji2->create_array_ = 1;
- DB_ASSERT(dbji->bt_prefix_method_id_ != NULL);
- return (size_t)(*jnienv)->CallIntMethod(jnienv, dbji->bt_prefix_,
- dbji->bt_prefix_method_id_,
- jdb, jdbt1, jdbt2);
- }
- void dbji_set_dup_compare_object(DB_JAVAINFO *dbji, JNIEnv *jnienv,
- DB *db, jobject jcompare)
- {
- jclass dup_compare_class;
- if (dbji->dup_compare_method_id_ == NULL) {
- dup_compare_class = get_class(jnienv, name_DbDupCompare);
- dbji->dup_compare_method_id_ =
- (*jnienv)->GetMethodID(jnienv, dup_compare_class,
- "dup_compare",
- "(Lcom/sleepycat/db/Db;"
- "Lcom/sleepycat/db/Dbt;"
- "Lcom/sleepycat/db/Dbt;)I");
- if (dbji->dup_compare_method_id_ == NULL) {
- /* XXX
- * We should really have a better way
- * to translate this to a Java exception class.
- * In theory, it shouldn't happen.
- */
- report_exception(jnienv, "Cannot find callback method",
- EFAULT, 0);
- return;
- }
- }
- if (dbji->dup_compare_ != NULL)
- DELETE_GLOBAL_REF(jnienv, dbji->dup_compare_);
- if (jcompare == NULL)
- db->set_dup_compare(db, NULL);
- else
- db->set_dup_compare(db, Db_dup_compare_callback);
- dbji->dup_compare_ = NEW_GLOBAL_REF(jnienv, jcompare);
- }
- int dbji_call_dup_compare(DB_JAVAINFO *dbji, DB *db, jobject jdb,
- const DBT *dbt1, const DBT *dbt2)
- {
- JNIEnv *jnienv;
- jobject jdbt1, jdbt2;
- DBT_JAVAINFO *dbtji1, *dbtji2;
- COMPQUIET(db, NULL);
- jnienv = dbji_get_jnienv(dbji);
- if (jnienv == NULL) {
- fprintf(stderr, "Cannot attach to current thread!n");
- return (0);
- }
- /* XXX
- * We should have a pool of Dbt objects used for this purpose
- * instead of creating new ones each time. Because of
- * multithreading, we may need an arbitrary number (more than two).
- * We might also have a byte arrays that grow as needed,
- * so we don't need to allocate those either.
- */
- jdbt1 = create_default_object(jnienv, name_DBT);
- jdbt2 = create_default_object(jnienv, name_DBT);
- dbtji1 = get_DBT_JAVAINFO(jnienv, jdbt1);
- memcpy(&dbtji1->dbt, dbt1, sizeof(DBT));
- dbtji1->create_array_ = 1;
- dbtji2 = get_DBT_JAVAINFO(jnienv, jdbt2);
- memcpy(&dbtji2->dbt, dbt2, sizeof(DBT));
- dbtji2->create_array_ = 1;
- DB_ASSERT(dbji->dup_compare_method_id_ != NULL);
- return (*jnienv)->CallIntMethod(jnienv, dbji->dup_compare_,
- dbji->dup_compare_method_id_,
- jdb, jdbt1, jdbt2);
- }
- void dbji_set_h_hash_object(DB_JAVAINFO *dbji, JNIEnv *jnienv,
- DB *db, jobject jhash)
- {
- jclass h_hash_class;
- if (dbji->h_hash_method_id_ == NULL) {
- h_hash_class = get_class(jnienv, name_DbHash);
- dbji->h_hash_method_id_ =
- (*jnienv)->GetMethodID(jnienv, h_hash_class,
- "hash",
- "(Lcom/sleepycat/db/Db;"
- "[BI)I");
- if (dbji->h_hash_method_id_ == NULL) {
- /* XXX
- * We should really have a better way
- * to translate this to a Java exception class.
- * In theory, it shouldn't happen.
- */
- report_exception(jnienv, "Cannot find callback method",
- EFAULT, 0);
- return;
- }
- }
- if (dbji->h_hash_ != NULL)
- DELETE_GLOBAL_REF(jnienv, dbji->h_hash_);
- if (jhash == NULL)
- db->set_h_hash(db, NULL);
- else
- db->set_h_hash(db, Db_h_hash_callback);
- dbji->h_hash_ = NEW_GLOBAL_REF(jnienv, jhash);
- }
- int dbji_call_h_hash(DB_JAVAINFO *dbji, DB *db, jobject jdb,
- const void *data, int len)
- {
- JNIEnv *jnienv;
- jbyteArray jarray;
- COMPQUIET(db, NULL);
- jnienv = dbji_get_jnienv(dbji);
- if (jnienv == NULL) {
- fprintf(stderr, "Cannot attach to current thread!n");
- return (0);
- }
- DB_ASSERT(dbji->h_hash_method_id_ != NULL);
- jarray = (*jnienv)->NewByteArray(jnienv, len);
- (*jnienv)->SetByteArrayRegion(jnienv, jarray, 0, len, (void *)data);
- return (*jnienv)->CallIntMethod(jnienv, dbji->h_hash_,
- dbji->h_hash_method_id_,
- jdb, jarray, len);
- }