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
23
24 /*******************************************************************************
25 **
26 ** Function: JNI_OnLoad
27 **
28 ** Description: Register all JNI functions with Java Virtual Machine.
29 ** jvm: Java Virtual Machine.
30 ** reserved: Not used.
31 **
32 ** Returns: JNI version.
33 **
34 *******************************************************************************/
JNI_OnLoad(JavaVM * jvm,void *)35 jint JNI_OnLoad (JavaVM* jvm, void*)
36 {
37 ALOGD ("%s: enter", __FUNCTION__);
38 JNIEnv *e = NULL;
39
40 ALOGI("NFC Service: loading nci JNI");
41
42 // Check JNI version
43 if (jvm->GetEnv ((void **) &e, JNI_VERSION_1_6))
44 return JNI_ERR;
45
46 if (android::register_com_android_nfc_NativeNfcManager (e) == -1)
47 return JNI_ERR;
48 if (android::register_com_android_nfc_NativeLlcpServiceSocket (e) == -1)
49 return JNI_ERR;
50 if (android::register_com_android_nfc_NativeLlcpSocket (e) == -1)
51 return JNI_ERR;
52 if (android::register_com_android_nfc_NativeNfcTag (e) == -1)
53 return JNI_ERR;
54 if (android::register_com_android_nfc_NativeLlcpConnectionlessSocket (e) == -1)
55 return JNI_ERR;
56 if (android::register_com_android_nfc_NativeP2pDevice (e) == -1)
57 return JNI_ERR;
58 if (android::register_com_android_nfc_NativeNfcSecureElement (e) == -1)
59 return JNI_ERR;
60 ALOGD ("%s: exit", __FUNCTION__);
61 return JNI_VERSION_1_6;
62 }
63
64
65 namespace android
66 {
67
68
69 /*******************************************************************************
70 **
71 ** Function: nfc_jni_cache_object
72 **
73 ** Description:
74 **
75 ** Returns: Status code.
76 **
77 *******************************************************************************/
nfc_jni_cache_object(JNIEnv * e,const char * className,jobject * cachedObj)78 int nfc_jni_cache_object (JNIEnv *e, const char *className, jobject *cachedObj)
79 {
80 ScopedLocalRef<jclass> cls(e, e->FindClass(className));
81 if (cls.get() == NULL)
82 {
83 ALOGE("%s: find class error", __FUNCTION__);
84 return -1;
85 }
86
87 jmethodID ctor = e->GetMethodID(cls.get(), "<init>", "()V");
88 ScopedLocalRef<jobject> obj(e, e->NewObject(cls.get(), ctor));
89 if (obj.get() == NULL)
90 {
91 ALOGE("%s: create object error", __FUNCTION__);
92 return -1;
93 }
94
95 *cachedObj = e->NewGlobalRef(obj.get());
96 if (*cachedObj == NULL)
97 {
98 ALOGE("%s: global ref error", __FUNCTION__);
99 return -1;
100 }
101 return 0;
102 }
103
104
105 /*******************************************************************************
106 **
107 ** Function: nfc_jni_get_nfc_socket_handle
108 **
109 ** Description: Get the value of "mHandle" member variable.
110 ** e: JVM environment.
111 ** o: Java object.
112 **
113 ** Returns: Value of mHandle.
114 **
115 *******************************************************************************/
nfc_jni_get_nfc_socket_handle(JNIEnv * e,jobject o)116 int nfc_jni_get_nfc_socket_handle (JNIEnv *e, jobject o)
117 {
118 ScopedLocalRef<jclass> c(e, e->GetObjectClass(o));
119 jfieldID f = e->GetFieldID(c.get(), "mHandle", "I");
120 return e->GetIntField(o, f);
121 }
122
123
124 /*******************************************************************************
125 **
126 ** Function: nfc_jni_get_nat
127 **
128 ** Description: Get the value of "mNative" member variable.
129 ** e: JVM environment.
130 ** o: Java object.
131 **
132 ** Returns: Pointer to the value of mNative.
133 **
134 *******************************************************************************/
nfc_jni_get_nat(JNIEnv * e,jobject o)135 struct nfc_jni_native_data* nfc_jni_get_nat(JNIEnv *e, jobject o)
136 {
137 ScopedLocalRef<jclass> c(e, e->GetObjectClass(o));
138 jfieldID f = e->GetFieldID(c.get(), "mNative", "I");
139 /* Retrieve native structure address */
140 return (struct nfc_jni_native_data*) e->GetIntField(o, f);
141 }
142
143
144 } // namespace android
145