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
|
/**
* @copyright
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
* ====================================================================
* @endcopyright
*/
#ifndef SVN_JAVAHL_JNIWRAPPER_STACK_HPP
#define SVN_JAVAHL_JNIWRAPPER_STACK_HPP
#ifdef SVN_JAVAHL_DEBUG
# ifndef SVN_JAVAHL_ASSERT_EXCEPTION_THROWN
# include <cassert>
# define SVN_JAVAHL_ASSERT_EXCEPTION_THROWN(E) \
assert((E).ExceptionCheck())
# endif // SVN_JAVAHL_ASSERT_EXCEPTION_THROWN
#else
# define SVN_JAVAHL_ASSERT_EXCEPTION_THROWN(E)
# endif // SVN_JAVAHL_DEBUG
#include "../JNIStackElement.h"
#include "jni_env.hpp"
#include "jni_exception.hpp"
#include "svn_error.h"
/**
* Boilerplate for the native method implementation entry point.
*
* Every native method implementation should start by invoking this
* macro to initialize the logging stack element and begin the
* try/catch block of the function body.
*
* @param C The name of the Java class that declares this method.
* @param M The (Java) name of the method.
*
* This macro expects two additional parameters to be available
* (either as function arguments or local variables):
* @c JNIEnv* @a jenv and @c jobject @a jthis.
*
* @since New in 1.9.
*/
#define SVN_JAVAHL_JNI_TRY(C, M) \
::JNIStackElement st_ac_ke_le_me_nt_(jenv, #C, #M, jthis); \
try
/**
* Boilerplate for the native method implementation entry point.
*
* Initializes local variable named @a V as a pointer to an instance
* of the native-bound class @a C.
*
* @since New in 1.9.
*/
#define SVN_JAVAHL_GET_BOUND_OBJECT(C, V) \
C* const V = C::get_self(::Java::Env(jenv), jthis)
/**
* Boilerplate for the native method implementation entry point.
*
* Like #SVN_JAVAHL_JNI_TRY, but for static methods where the @c jthis
* argument is not available.
*
* This macro expects two additional parameters to be available
* (either as function arguments or local variables):
* @c JNIEnv* @a jenv and @c jclass @a jclazz.
*
* @since New in 1.9.
*/
#define SVN_JAVAHL_JNI_TRY_STATIC(C, M) \
::JNIStackElement st_ac_ke_le_me_nt_(jenv, #C, #M, jclazz); \
try
/**
* Boilerplate for the native method implementation exit point.
*
* Every native method implementation should end by invoking this
* macro to close the try/catch block of the function body and handle
* any exceptions thrown by the method implementation.
*
* This boilerplate variant converts C++ exceptions to the Java
* exception type @a X, but retains exceptions that are already in
* progress.
*
* @since New in 1.9.
*/
#define SVN_JAVAHL_JNI_CATCH_TO_EXCEPTION(X) \
catch (const ::Java::SignalExceptionThrown&) \
{ \
SVN_JAVAHL_ASSERT_EXCEPTION_THROWN(::Java::Env(jenv)); \
} \
catch (const ::std::exception& ex) \
{ \
X(::Java::Env(jenv)).throw_java_exception(ex.what()); \
} \
catch (...) \
{ \
const char* const msg = Java::unknown_cxx_exception_message(); \
X(::Java::Env(jenv)).throw_java_exception(msg); \
}
/**
* Boilerplate for the native method implementation exit point.
*
* Invokes #SVN_JAVAHL_JNI_CATCH_TO_EXCEPTION to throw a
* @c RuntimeException.
*
* @since New in 1.9.
*/
#define SVN_JAVAHL_JNI_CATCH \
SVN_JAVAHL_JNI_CATCH_TO_EXCEPTION(::Java::RuntimeException)
/**
* Invocation wrapper for functions that return an @c svn_error_t *.
*
* @param E A wrapped environment (@c Java::Env) instance.
* @param S The statement to execute in the checked context.
*
* @since New in 1.9.
*/
#define SVN_JAVAHL_CHECK(E, S) \
do { \
svn_error_t* const ja_va_hl_err_te_mp_ = (S); \
if (ja_va_hl_err_te_mp_) \
::Java::handle_svn_error((E), ja_va_hl_err_te_mp_); \
} while(0)
/**
* Invocation wrapper for calling Java methods that may throw an
* exception from within a native callback that is expected to return
* an @c svn_error_t*.
*
* @param E A wrapped environment (@c Java::Env) instance.
* @param C A Subversion or APR error code.
* @param S The statement to execute in the checked context.
*
* @since New in 1.9.
*/
#define SVN_JAVAHL_CATCH(E, C, S) \
try \
{ \
S; \
} \
catch (const ::Java::SignalExceptionThrown&) \
{ \
SVN_JAVAHL_ASSERT_EXCEPTION_THROWN((E)); \
return Java::caught_java_exception_error((C)); \
} \
catch (const ::std::exception& ex) \
{ \
const char* const msg = ex.what(); \
::Java::RuntimeException((E)).throw_java_exception(msg); \
return svn_error_create((C), NULL, msg); \
} \
catch (...) \
{ \
const char* const msg = Java::unknown_cxx_exception_message(); \
::Java::RuntimeException((E)).throw_java_exception(msg); \
return svn_error_create((C), NULL, msg); \
}
/**
* Exception checker for the oldstyle implementation that does not use
* the @c Java::Env environment wrapper.
*
* @param E A wrapped environment (@c Java::Env) instance.
*
* @since New in 1.9.
*/
#define SVN_JAVAHL_OLDSTYLE_EXCEPTION_CHECK(E) \
do { \
if ((E).ExceptionCheck()) \
throw ::Java::SignalExceptionThrown(); \
} while(0)
namespace Java {
/**
* Handle an error @a err returned from a native function and throws
* an appropriate Java exception.
*
* @since New in 1.9.
*/
void handle_svn_error(Env env, svn_error_t* err);
/**
* Return a localized error string for an unknown C++ exception.
*
* @since New in 1.9.
*/
const char* unknown_cxx_exception_message() throw();
/**
* Create an svn_error_t for a caught Java exception.
*
* @since New in 1.9.
*/
svn_error_t* caught_java_exception_error(apr_status_t status) throw();
} // namespace Java
#endif // SVN_JAVAHL_JNIWRAPPER_STACK_HPP
|
