MPD: java/Class.hxx Source File

MPD 0.20.18

Class.hxx
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1 /*
2 * Copyright (C) 2010-2011 Max Kellermann <max.kellermann@gmail.com>
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * - Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the
14 * distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
19 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
20 * FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
27 * OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #ifndef JAVA_CLASS_HXX
31 #define JAVA_CLASS_HXX
32
33 #include "Ref.hxx"
34
35 #include <assert.h>
36
37 namespace Java {
41 class Class : public Java::LocalRef<jclass> {
42 public:
43 Class(JNIEnv *env, jclass cls)
44 :LocalRef<jclass>(env, cls) {}
45
46 Class(JNIEnv *env, const char *name)
47 :LocalRef<jclass>(env, env->FindClass(name)) {}
48 };
49
53 class TrivialClass : public TrivialRef<jclass> {
54 public:
55 void Find(JNIEnv *env, const char *name) {
56 assert(env != nullptr);
57 assert(name != nullptr);
58
59 jclass cls = env->FindClass(name);
60 assert(cls != nullptr);
61
62 Set(env, cls);
63 env->DeleteLocalRef(cls);
64 }
65
66 bool FindOptional(JNIEnv *env, const char *name) {
67 assert(env != nullptr);
68 assert(name != nullptr);
69
70 jclass cls = env->FindClass(name);
71 if (cls == nullptr) {
72 env->ExceptionClear();
73 return false;
74 }
75
76 Set(env, cls);
77 env->DeleteLocalRef(cls);
78 return true;
79 }
80 };
81 }
82
83 #endif
Java::TrivialRef< jclass >::Set
void Set(JNIEnv *env, jclass _value)
Obtain a global reference on the specified object and store it.
Definition: Ref.hxx:145
Java::TrivialClass
Wrapper for a global "jclass" reference.
Definition: Class.hxx:53
Java::Class
Wrapper for a local "jclass" reference.
Definition: Class.hxx:41
Java::Class::Class
Class(JNIEnv *env, const char *name)
Definition: Class.hxx:46
Java::TrivialRef
Container for a global reference to a JNI object that gets initialised and deinitialised explicitly...
Definition: Ref.hxx:128
Java::TrivialClass::Find
void Find(JNIEnv *env, const char *name)
Definition: Class.hxx:55
Java::TrivialClass::FindOptional
bool FindOptional(JNIEnv *env, const char *name)
Definition: Class.hxx:66
Java::Class::Class
Class(JNIEnv *env, jclass cls)
Definition: Class.hxx:43
Ref.hxx
Java
Definition: Class.hxx:37
Java::LocalRef
Hold a local reference on a JNI object.
Definition: Ref.hxx:44
name
const Partition const char * name
Definition: Count.hxx:34