1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16#include "NfcJniUtil.h"
17
18#include <cutils/log.h>
19#include <errno.h>
20#include <JNIHelp.h>
21#include <ScopedLocalRef.h>
22#include "RoutingManager.h"
23
24
25/*******************************************************************************
26**
27** Function:        JNI_OnLoad
28**
29** Description:     Register all JNI functions with Java Virtual Machine.
30**                  jvm: Java Virtual Machine.
31**                  reserved: Not used.
32**
33** Returns:         JNI version.
34**
35*******************************************************************************/
36jint JNI_OnLoad (JavaVM* jvm, void*)
37{
38    ALOGD ("%s: enter", __FUNCTION__);
39    JNIEnv *e = NULL;
40
41    ALOGI("NFC Service: loading nci JNI");
42
43    // Check JNI version
44    if (jvm->GetEnv ((void **) &e, JNI_VERSION_1_6))
45        return JNI_ERR;
46
47    if (android::register_com_android_nfc_NativeNfcManager (e) == -1)
48        return JNI_ERR;
49    if (android::register_com_android_nfc_NativeLlcpServiceSocket (e) == -1)
50        return JNI_ERR;
51    if (android::register_com_android_nfc_NativeLlcpSocket (e) == -1)
52        return JNI_ERR;
53    if (android::register_com_android_nfc_NativeNfcTag (e) == -1)
54        return JNI_ERR;
55    if (android::register_com_android_nfc_NativeLlcpConnectionlessSocket (e) == -1)
56        return JNI_ERR;
57    if (android::register_com_android_nfc_NativeP2pDevice (e) == -1)
58        return JNI_ERR;
59    if (RoutingManager::getInstance().registerJniFunctions (e) == -1)
60        return JNI_ERR;
61    ALOGD ("%s: exit", __FUNCTION__);
62    return JNI_VERSION_1_6;
63}
64
65
66namespace android
67{
68
69
70/*******************************************************************************
71**
72** Function:        nfc_jni_cache_object
73**
74** Description:
75**
76** Returns:         Status code.
77**
78*******************************************************************************/
79int nfc_jni_cache_object (JNIEnv *e, const char *className, jobject *cachedObj)
80{
81    ScopedLocalRef<jclass> cls(e, e->FindClass(className));
82    if (cls.get() == NULL)
83    {
84        ALOGE("%s: find class error", __FUNCTION__);
85        return -1;
86    }
87
88    jmethodID ctor = e->GetMethodID(cls.get(), "<init>", "()V");
89    ScopedLocalRef<jobject> obj(e, e->NewObject(cls.get(), ctor));
90    if (obj.get() == NULL)
91    {
92       ALOGE("%s: create object error", __FUNCTION__);
93       return -1;
94    }
95
96    *cachedObj = e->NewGlobalRef(obj.get());
97    if (*cachedObj == NULL)
98    {
99        ALOGE("%s: global ref error", __FUNCTION__);
100        return -1;
101    }
102    return 0;
103}
104
105
106/*******************************************************************************
107**
108** Function:        nfc_jni_get_nfc_socket_handle
109**
110** Description:     Get the value of "mHandle" member variable.
111**                  e: JVM environment.
112**                  o: Java object.
113**
114** Returns:         Value of mHandle.
115**
116*******************************************************************************/
117int nfc_jni_get_nfc_socket_handle (JNIEnv *e, jobject o)
118{
119    ScopedLocalRef<jclass> c(e, e->GetObjectClass(o));
120    jfieldID f = e->GetFieldID(c.get(), "mHandle", "I");
121    return e->GetIntField(o, f);
122}
123
124
125/*******************************************************************************
126**
127** Function:        nfc_jni_get_nat
128**
129** Description:     Get the value of "mNative" member variable.
130**                  e: JVM environment.
131**                  o: Java object.
132**
133** Returns:         Pointer to the value of mNative.
134**
135*******************************************************************************/
136struct nfc_jni_native_data* nfc_jni_get_nat(JNIEnv *e, jobject o)
137{
138   ScopedLocalRef<jclass> c(e, e->GetObjectClass(o));
139   jfieldID f = e->GetFieldID(c.get(), "mNative", "J");
140   /* Retrieve native structure address */
141   return (struct nfc_jni_native_data*) e->GetLongField(o, f);
142}
143
144
145/*******************************************************************************
146**
147** Function         nfc_jni_cache_object_local
148**
149** Description      Allocates a java object and calls it's constructor
150**
151** Returns          -1 on failure, 0 on success
152**
153*******************************************************************************/
154int nfc_jni_cache_object_local (JNIEnv *e, const char *className, jobject *cachedObj)
155{
156    ScopedLocalRef<jclass> cls(e, e->FindClass(className));
157    if(cls.get() == NULL)
158    {
159        ALOGE ("%s: find class error", __FUNCTION__);
160        return -1;
161    }
162
163    jmethodID ctor = e->GetMethodID(cls.get(), "<init>", "()V");
164    jobject obj = e->NewObject(cls.get(), ctor);
165    if (obj == NULL)
166    {
167       ALOGE ("%s: create object error", __FUNCTION__);
168       return -1;
169    }
170
171    *cachedObj = obj;
172    if (*cachedObj == NULL)
173    {
174        ALOGE ("%s: global ref error", __FUNCTION__);
175        return -1;
176    }
177    return 0;
178}
179
180
181} // namespace android
182