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
17 #include "NfcJniUtil.h"
18
19 #include <errno.h>
20
21 #include <log/log.h>
22
23 #include <JNIHelp.h>
24 #include <ScopedLocalRef.h>
25 #include "RoutingManager.h"
26
27 /*******************************************************************************
28 **
29 ** Function: JNI_OnLoad
30 **
31 ** Description: Register all JNI functions with Java Virtual Machine.
32 ** jvm: Java Virtual Machine.
33 ** reserved: Not used.
34 **
35 ** Returns: JNI version.
36 **
37 *******************************************************************************/
JNI_OnLoad(JavaVM * jvm,void *)38 jint JNI_OnLoad (JavaVM* jvm, void*)
39 {
40 ALOGV("%s: enter", __func__);
41 JNIEnv *e = NULL;
42
43 ALOGI("NFC Service: loading nci JNI");
44
45 // Check JNI version
46 if (jvm->GetEnv ((void **) &e, JNI_VERSION_1_6))
47 return JNI_ERR;
48
49 if (android::register_com_android_nfc_NativeNfcManager (e) == -1)
50 return JNI_ERR;
51 if (android::register_com_android_nfc_NativeLlcpServiceSocket (e) == -1)
52 return JNI_ERR;
53 if (android::register_com_android_nfc_NativeLlcpSocket (e) == -1)
54 return JNI_ERR;
55 if (android::register_com_android_nfc_NativeNfcTag (e) == -1)
56 return JNI_ERR;
57 if (android::register_com_android_nfc_NativeLlcpConnectionlessSocket (e) == -1)
58 return JNI_ERR;
59 if (android::register_com_android_nfc_NativeP2pDevice (e) == -1)
60 return JNI_ERR;
61 if (RoutingManager::getInstance().registerJniFunctions (e) == -1)
62 return JNI_ERR;
63 ALOGV("%s: exit", __func__);
64 return JNI_VERSION_1_6;
65 }
66
67
68 namespace android
69 {
70
71
72 /*******************************************************************************
73 **
74 ** Function: nfc_jni_cache_object
75 **
76 ** Description:
77 **
78 ** Returns: Status code.
79 **
80 *******************************************************************************/
nfc_jni_cache_object(JNIEnv * e,const char * className,jobject * cachedObj)81 int nfc_jni_cache_object (JNIEnv *e, const char *className, jobject *cachedObj)
82 {
83 ScopedLocalRef<jclass> cls(e, e->FindClass(className));
84 if (cls.get() == NULL)
85 {
86 ALOGE("%s: find class error", __func__);
87 return -1;
88 }
89
90 jmethodID ctor = e->GetMethodID(cls.get(), "<init>", "()V");
91 ScopedLocalRef<jobject> obj(e, e->NewObject(cls.get(), ctor));
92 if (obj.get() == NULL)
93 {
94 ALOGE("%s: create object error", __func__);
95 return -1;
96 }
97
98 *cachedObj = e->NewGlobalRef(obj.get());
99 if (*cachedObj == NULL)
100 {
101 ALOGE("%s: global ref error", __func__);
102 return -1;
103 }
104 return 0;
105 }
106
107
108 /*******************************************************************************
109 **
110 ** Function: nfc_jni_get_nfc_socket_handle
111 **
112 ** Description: Get the value of "mHandle" member variable.
113 ** e: JVM environment.
114 ** o: Java object.
115 **
116 ** Returns: Value of mHandle.
117 **
118 *******************************************************************************/
nfc_jni_get_nfc_socket_handle(JNIEnv * e,jobject o)119 int nfc_jni_get_nfc_socket_handle (JNIEnv *e, jobject o)
120 {
121 ScopedLocalRef<jclass> c(e, e->GetObjectClass(o));
122 jfieldID f = e->GetFieldID(c.get(), "mHandle", "I");
123 return e->GetIntField(o, f);
124 }
125
126
127 /*******************************************************************************
128 **
129 ** Function: nfc_jni_get_nat
130 **
131 ** Description: Get the value of "mNative" member variable.
132 ** e: JVM environment.
133 ** o: Java object.
134 **
135 ** Returns: Pointer to the value of mNative.
136 **
137 *******************************************************************************/
nfc_jni_get_nat(JNIEnv * e,jobject o)138 struct nfc_jni_native_data* nfc_jni_get_nat(JNIEnv *e, jobject o)
139 {
140 ScopedLocalRef<jclass> c(e, e->GetObjectClass(o));
141 jfieldID f = e->GetFieldID(c.get(), "mNative", "J");
142 /* Retrieve native structure address */
143 return (struct nfc_jni_native_data*) e->GetLongField(o, f);
144 }
145
146
147 /*******************************************************************************
148 **
149 ** Function nfc_jni_cache_object_local
150 **
151 ** Description Allocates a java object and calls it's constructor
152 **
153 ** Returns -1 on failure, 0 on success
154 **
155 *******************************************************************************/
nfc_jni_cache_object_local(JNIEnv * e,const char * className,jobject * cachedObj)156 int nfc_jni_cache_object_local (JNIEnv *e, const char *className, jobject *cachedObj)
157 {
158 ScopedLocalRef<jclass> cls(e, e->FindClass(className));
159 if(cls.get() == NULL)
160 {
161 ALOGE("%s: find class error", __func__);
162 return -1;
163 }
164
165 jmethodID ctor = e->GetMethodID(cls.get(), "<init>", "()V");
166 jobject obj = e->NewObject(cls.get(), ctor);
167 if (obj == NULL)
168 {
169 ALOGE("%s: create object error", __func__);
170 return -1;
171 }
172
173 *cachedObj = obj;
174 if (*cachedObj == NULL)
175 {
176 ALOGE("%s: global ref error", __func__);
177 return -1;
178 }
179 return 0;
180 }
181
182
183 } // namespace android
184