1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
/*
* Copyright (C) 2003 Apple Computer, Inc. All rights reserved.
* Copyright 2009, The Android Open Source Project
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "jni_runtime.h"
#include "jni_utility.h"
using namespace JSC::Bindings;
JavaParameter::JavaParameter (JNIEnv *env, jstring type)
{
_type = JavaString (env, type);
_JNIType = JNITypeFromClassName (_type.UTF8String());
}
JavaField::JavaField (JNIEnv *env, jobject aField)
{
// Get field type
jobject fieldType = callJNIMethod<jobject>(aField, "getType", "()Ljava/lang/Class;");
jstring fieldTypeName = (jstring)callJNIMethod<jobject>(fieldType, "getName", "()Ljava/lang/String;");
_type = JavaString(env, fieldTypeName);
_JNIType = JNITypeFromClassName (_type.UTF8String());
// Get field name
jstring fieldName = (jstring)callJNIMethod<jobject>(aField, "getName", "()Ljava/lang/String;");
_name = JavaString(env, fieldName);
_field = new JObjectWrapper(aField);
}
JavaMethod::JavaMethod (JNIEnv *env, jobject aMethod)
{
// Get return type
jobject returnType = callJNIMethod<jobject>(aMethod, "getReturnType", "()Ljava/lang/Class;");
jstring returnTypeName = (jstring)callJNIMethod<jobject>(returnType, "getName", "()Ljava/lang/String;");
_returnType =JavaString (env, returnTypeName);
_JNIReturnType = JNITypeFromClassName (_returnType.UTF8String());
env->DeleteLocalRef (returnType);
env->DeleteLocalRef (returnTypeName);
// Get method name
jstring methodName = (jstring)callJNIMethod<jobject>(aMethod, "getName", "()Ljava/lang/String;");
_name = JavaString (env, methodName);
env->DeleteLocalRef (methodName);
// Get parameters
jarray jparameters = (jarray)callJNIMethod<jobject>(aMethod, "getParameterTypes", "()[Ljava/lang/Class;");
_numParameters = env->GetArrayLength (jparameters);
_parameters = new JavaParameter[_numParameters];
int i;
for (i = 0; i < _numParameters; i++) {
jobject aParameter = env->GetObjectArrayElement ((jobjectArray)jparameters, i);
jstring parameterName = (jstring)callJNIMethod<jobject>(aParameter, "getName", "()Ljava/lang/String;");
_parameters[i] = JavaParameter(env, parameterName);
env->DeleteLocalRef (aParameter);
env->DeleteLocalRef (parameterName);
}
env->DeleteLocalRef (jparameters);
// Created lazily.
_signature = 0;
_methodID = 0;
jclass modifierClass = env->FindClass("java/lang/reflect/Modifier");
int modifiers = callJNIMethod<jint>(aMethod, "getModifiers", "()I");
_isStatic = (bool)callJNIStaticMethod<jboolean>(modifierClass, "isStatic", "(I)Z", modifiers);
env->DeleteLocalRef(modifierClass);
}
JavaMethod::~JavaMethod()
{
if (_signature)
free(_signature);
delete [] _parameters;
};
class SignatureBuilder {
public:
explicit SignatureBuilder(int init_size) {
if (init_size <= 0)
init_size = 16;
size_ = init_size;
length_ = 0;
storage_ = (char*)malloc(size_ * sizeof(char));
}
~SignatureBuilder() {
free(storage_);
}
void append(const char* s) {
int l = strlen(s);
expandIfNeeded(l);
memcpy(storage_ + length_, s, l);
length_ += l;
}
// JNI method signatures use '/' between components of a class name, but
// we get '.' between components from the reflection API.
void appendClassName(const char* className) {
int l = strlen(className);
expandIfNeeded(l);
char* sp = storage_ + length_;
const char* cp = className;
while (*cp) {
if (*cp == '.')
*sp = '/';
else
*sp = *cp;
cp++;
sp++;
}
length_ += l;
}
// make a duplicated copy of the content.
char* ascii() {
if (length_ == 0)
return NULL;
storage_[length_] = '\0';
return strndup(storage_, length_);
}
private:
void expandIfNeeded(int l) {
// expand storage if needed
if (l + length_ >= size_) {
int new_size = 2 * size_;
if (l + length_ >= new_size)
new_size = l + length_ + 1;
char* new_storage = (char*)malloc(new_size * sizeof(char));
memcpy(new_storage, storage_, length_);
size_ = new_size;
free(storage_);
storage_ = new_storage;
}
}
int size_;
int length_;
char* storage_;
};
const char *JavaMethod::signature() const
{
if (!_signature) {
SignatureBuilder signatureBuilder(64);
signatureBuilder.append("(");
for (int i = 0; i < _numParameters; i++) {
JavaParameter* aParameter = parameterAt(i);
JNIType _JNIType = aParameter->getJNIType();
if (_JNIType == array_type)
signatureBuilder.appendClassName(aParameter->type());
else {
signatureBuilder.append(signatureFromPrimitiveType(_JNIType));
if (_JNIType == object_type) {
signatureBuilder.appendClassName(aParameter->type());
signatureBuilder.append(";");
}
}
}
signatureBuilder.append(")");
const char *returnType = _returnType.UTF8String();
if (_JNIReturnType == array_type) {
signatureBuilder.appendClassName(returnType);
} else {
signatureBuilder.append(signatureFromPrimitiveType(_JNIReturnType));
if (_JNIReturnType == object_type) {
signatureBuilder.appendClassName(returnType);
signatureBuilder.append(";");
}
}
_signature = signatureBuilder.ascii();
}
return _signature;
}
JNIType JavaMethod::JNIReturnType() const
{
return _JNIReturnType;
}
jmethodID JavaMethod::methodID (jobject obj) const
{
if (_methodID == 0) {
_methodID = getMethodID (obj, _name.UTF8String(), signature());
}
return _methodID;
}
|
