/*
* Copyright (c) 2016 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <jni.h>
#include "vppjni_env.h"
// Head of the class registration list.
static vppjni_class_t *class_head;
// Head of the class registration list.
static vppjni_field_t *field_head;
void vppjni_init_register_class(vppjni_class_t *ptr)
{
vppjni_class_t **where = &class_head;
while (*where != NULL) {
where = &((*where)->next);
}
*where = ptr;
}
void vppjni_register_field(vppjni_field_t *ptr) {
vppjni_field_t **where = &field_head;
while (*where != NULL) {
where = &((*where)->next);
}
*where = ptr;
}
jobject vppjni_init_new_object(JNIEnv *env, const vppjni_class_t *ptr, va_list ap) {
jobject obj = (*env)->NewObjectV(env, ptr->jclass, ptr->jinit, ap);
if ((*env)->ExceptionCheck(env)) {
(*env)->ExceptionDescribe(env);
return NULL;
}
return obj;
}
int vppjni_env_init(JNIEnv *env)
{
vppjni_class_t *cwlk;
vppjni_field_t *fwlk;
for (cwlk = class_head; cwlk != NULL; cwlk = cwlk->next) {
jclass cls;
jmethodID method;
cls = (*env)->FindClass(env, cwlk->fqcn);
if ((*env)->ExceptionCheck(env)) {
(*env)->ExceptionDescribe(env);
vppjni_uninit(env);
return JNI_ERR;
}
method = (*env)->GetMethodID(env, cls, "<init>", cwlk->init_sig);
if ((*env)->ExceptionCheck(env)) {
(*env)->ExceptionDescribe(env);
vppjni_uninit(env);
return JNI_ERR;
}
cwlk->jclass = (*env)->NewGlobalRef(env, cls);
if (cwlk->jclass == NULL) {
vppjni_uninit(env);
return JNI_ERR;
}
cwlk->jinit = method;
}
for (fwlk = field_head; fwlk != NULL; fwlk = fwlk->next) {
fwlk->jfield = (*env)->GetFieldID(env, fwlk->clsref->jclass, fwlk->name, fwlk->type);
if ((*env)->ExceptionCheck(env)) {
(*env)->ExceptionDescribe(env);
vppjni_uninit(env);
return JNI_ERR;
}
}
return 0;
}
void vppjni_env_uninit(JNIEnv *env) {
vppjni_class_t *cwlk;
vppjni_field_t *fwlk;
for (fwlk = field_head; fwlk != NULL; fwlk = fwlk->next) {
fwlk->jfield = NULL;
}
for (cwlk = class_head; cwlk != NULL; cwlk = cwlk->next) {
if (cwlk->jclass != NULL ) {
(*env)->DeleteGlobalRef(env, cwlk->jclass);
}
cwlk->jclass = NULL;
cwlk->jinit = NULL;
}
}