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/*
Copyright (c) 2007-2009 FastMQ Inc.
This file is part of 0MQ.
0MQ is free software; you can redistribute it and/or modify it under
the terms of the Lesser GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
0MQ is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Lesser GNU General Public License for more details.
You should have received a copy of the Lesser GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include "zmq.h"
#include "org_zmq_Message.h"
static jfieldID msg_handle_fid = NULL;
static void
raise_exception (JNIEnv *env, int err)
{
// Get exception class.
jclass exception_class = env->FindClass ("java/lang/Exception");
assert (exception_class);
// Get text description of the exception.
const char *err_msg = strerror (err);
// Raise the exception.
int rc = env->ThrowNew (exception_class, err_msg);
assert (rc == 0);
// Free the local ref.
env->DeleteLocalRef (exception_class);
}
JNIEXPORT void JNICALL
Java_org_zmq_Message_construct (JNIEnv *env, jobject obj)
{
if (msg_handle_fid == NULL) {
jclass cls = env->GetObjectClass (obj);
assert (cls != NULL);
msg_handle_fid = env->GetFieldID (cls, "msgHandle", "J");
assert (msg_handle_fid != NULL);
env->DeleteLocalRef (cls);
}
zmq_msg_t *msg = (zmq_msg_t*) malloc (sizeof (zmq_msg_t));
if (msg == NULL) {
raise_exception (env, ENOMEM);
return;
}
int rc = zmq_msg_init (msg);
assert (rc == 0);
env->SetLongField (obj, msg_handle_fid, (jlong) msg);
}
JNIEXPORT void JNICALL
Java_org_zmq_Message_constructWithData (JNIEnv *env, jobject obj,
jbyteArray payload)
{
if (msg_handle_fid == NULL) {
jclass cls = env->GetObjectClass (obj);
assert (cls != NULL);
msg_handle_fid = env->GetFieldID (cls, "msgHandle", "J");
assert (msg_handle_fid != NULL);
env->DeleteLocalRef (cls);
}
zmq_msg_t *msg = (zmq_msg_t*) malloc (sizeof (zmq_msg_t));
if (msg == NULL) {
raise_exception (env, ENOMEM);
return;
}
jsize array_size = env->GetArrayLength (payload);
jbyte *array_data = env->GetByteArrayElements (payload, NULL);
int rc = zmq_msg_init_size (msg, array_size);
assert (rc == 0);
memcpy (zmq_msg_data (msg), array_data, array_size);
env->ReleaseByteArrayElements (payload, array_data, JNI_ABORT);
env->SetLongField (obj, msg_handle_fid, (jlong) msg);
}
JNIEXPORT void JNICALL
Java_org_zmq_Message_finalize (JNIEnv *env, jobject obj)
{
zmq_msg_t *msg = (zmq_msg_t*) env->GetLongField (obj, msg_handle_fid);
assert (msg);
int rc = zmq_msg_close (msg);
assert (rc == 0);
free (msg);
}
JNIEXPORT jbyteArray JNICALL
Java_org_zmq_Message_getMsgPayload (JNIEnv *env, jobject obj)
{
zmq_msg_t *msg = (zmq_msg_t*) env->GetLongField (obj, msg_handle_fid);
assert (msg);
jsize msg_size = zmq_msg_size (msg);
jbyte *msg_data = (jbyte*) zmq_msg_data (msg);
jbyteArray payload = env->NewByteArray (msg_size);
if (payload == NULL)
return NULL;
env->SetByteArrayRegion (payload, 0, msg_size, msg_data);
assert (!env->ExceptionCheck ());
return payload;
}
JNIEXPORT jint JNICALL
Java_org_zmq_Message_getMsgType (JNIEnv *env, jobject obj)
{
zmq_msg_t *msg = (zmq_msg_t*) env->GetLongField (obj, msg_handle_fid);
assert (msg);
return (jint) zmq_msg_type (msg);
}
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