1 /*
2 * Copyright 2010, The Android Open Source Project
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 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26
27 #include "config.h"
28 #include "JavaNPObjectV8.h"
29
30 #if ENABLE(JAVA_BRIDGE)
31
32 #include "JNIUtilityPrivate.h"
33 #include "JavaClassV8.h"
34 #include "JavaFieldV8.h"
35 #include "JavaInstanceV8.h"
36 #include "JavaMethod.h"
37 #include "JavaValueV8.h"
38 #include "npruntime_impl.h"
39
40 namespace JSC {
41
42 namespace Bindings {
43
AllocJavaNPObject(NPP,NPClass *)44 static NPObject* AllocJavaNPObject(NPP, NPClass*)
45 {
46 JavaNPObject* obj = static_cast<JavaNPObject*>(malloc(sizeof(JavaNPObject)));
47 if (!obj)
48 return 0;
49 memset(obj, 0, sizeof(JavaNPObject));
50 return reinterpret_cast<NPObject*>(obj);
51 }
52
FreeJavaNPObject(NPObject * npobj)53 static void FreeJavaNPObject(NPObject* npobj)
54 {
55 JavaNPObject* obj = reinterpret_cast<JavaNPObject*>(npobj);
56 obj->m_instance = 0; // free does not call the destructor
57 free(obj);
58 }
59
60 static NPClass JavaNPObjectClass = {
61 NP_CLASS_STRUCT_VERSION,
62 AllocJavaNPObject, // allocate,
63 FreeJavaNPObject, // free,
64 0, // invalidate
65 JavaNPObjectHasMethod,
66 JavaNPObjectInvoke,
67 0, // invokeDefault,
68 JavaNPObjectHasProperty,
69 JavaNPObjectGetProperty,
70 0, // setProperty
71 0, // removeProperty
72 0, // enumerate
73 0 // construct
74 };
75
JavaInstanceToNPObject(JavaInstance * instance)76 NPObject* JavaInstanceToNPObject(JavaInstance* instance)
77 {
78 JavaNPObject* object = reinterpret_cast<JavaNPObject*>(_NPN_CreateObject(0, &JavaNPObjectClass));
79 object->m_instance = instance;
80 return reinterpret_cast<NPObject*>(object);
81 }
82
83 // Returns null if obj is not a wrapper of JavaInstance
ExtractJavaInstance(NPObject * obj)84 JavaInstance* ExtractJavaInstance(NPObject* obj)
85 {
86 if (obj->_class == &JavaNPObjectClass)
87 return reinterpret_cast<JavaNPObject*>(obj)->m_instance.get();
88 return 0;
89 }
90
JavaNPObjectHasMethod(NPObject * obj,NPIdentifier identifier)91 bool JavaNPObjectHasMethod(NPObject* obj, NPIdentifier identifier)
92 {
93 JavaInstance* instance = ExtractJavaInstance(obj);
94 if (!instance)
95 return false;
96 NPUTF8* name = _NPN_UTF8FromIdentifier(identifier);
97 if (!name)
98 return false;
99
100 instance->begin();
101 bool result = (instance->getClass()->methodsNamed(name).size() > 0);
102 instance->end();
103
104 // TODO: use NPN_MemFree
105 free(name);
106
107 return result;
108 }
109
JavaNPObjectInvoke(NPObject * obj,NPIdentifier identifier,const NPVariant * args,uint32_t argCount,NPVariant * result)110 bool JavaNPObjectInvoke(NPObject* obj, NPIdentifier identifier, const NPVariant* args, uint32_t argCount, NPVariant* result)
111 {
112 JavaInstance* instance = ExtractJavaInstance(obj);
113 if (!instance)
114 return false;
115 NPUTF8* name = _NPN_UTF8FromIdentifier(identifier);
116 if (!name)
117 return false;
118
119 instance->begin();
120
121 MethodList methodList = instance->getClass()->methodsNamed(name);
122 // TODO: use NPN_MemFree
123 free(name);
124
125 // Try to find a good match for the overloaded method. The
126 // fundamental problem is that JavaScript doesn't have the
127 // notion of method overloading and Java does. We could
128 // get a bit more sophisticated and attempt to do some
129 // type checking as well as checking the number of parameters.
130 size_t numMethods = methodList.size();
131 JavaMethod* aMethod;
132 JavaMethod* jMethod = 0;
133 for (size_t methodIndex = 0; methodIndex < numMethods; methodIndex++) {
134 aMethod = methodList[methodIndex];
135 if (aMethod->numParameters() == static_cast<int>(argCount)) {
136 jMethod = aMethod;
137 break;
138 }
139 }
140 if (!jMethod) {
141 instance->end();
142 return false;
143 }
144
145 JavaValue* jArgs = new JavaValue[argCount];
146 for (unsigned int i = 0; i < argCount; i++)
147 jArgs[i] = convertNPVariantToJavaValue(args[i], jMethod->parameterAt(i));
148
149 // ANDROID
150 bool exceptionOccurred;
151 JavaValue jResult = instance->invokeMethod(jMethod, jArgs, exceptionOccurred);
152 instance->end();
153 delete[] jArgs;
154
155 if (exceptionOccurred)
156 return false;
157 // END ANDROID
158
159 VOID_TO_NPVARIANT(*result);
160 convertJavaValueToNPVariant(jResult, result);
161 return true;
162 }
163
JavaNPObjectHasProperty(NPObject * obj,NPIdentifier identifier)164 bool JavaNPObjectHasProperty(NPObject* obj, NPIdentifier identifier)
165 {
166 JavaInstance* instance = ExtractJavaInstance(obj);
167 if (!instance)
168 return false;
169 NPUTF8* name = _NPN_UTF8FromIdentifier(identifier);
170 if (!name)
171 return false;
172 instance->begin();
173 bool result = instance->getClass()->fieldNamed(name);
174 instance->end();
175 free(name);
176 return result;
177 }
178
JavaNPObjectGetProperty(NPObject * obj,NPIdentifier identifier,NPVariant * result)179 bool JavaNPObjectGetProperty(NPObject* obj, NPIdentifier identifier, NPVariant* result)
180 {
181 VOID_TO_NPVARIANT(*result);
182 JavaInstance* instance = ExtractJavaInstance(obj);
183 if (!instance)
184 return false;
185 NPUTF8* name = _NPN_UTF8FromIdentifier(identifier);
186 if (!name)
187 return false;
188
189 instance->begin();
190 JavaField* field = instance->getClass()->fieldNamed(name);
191 free(name); // TODO: use NPN_MemFree
192 if (!field) {
193 instance->end();
194 return false;
195 }
196
197 #if PLATFORM(ANDROID)
198 // JSC does not seem to support returning object properties so we emulate that
199 // behaviour here.
200 JavaValue value;
201 #else
202 JavaValue value = instance->getField(field);
203 #endif // PLATFORM(ANDROID)
204 instance->end();
205
206 convertJavaValueToNPVariant(value, result);
207
208 return true;
209 }
210
211 } // namespace Bindings
212
213 } // namespace JSC
214
215 #endif // ENABLE(JAVA_BRIDGE)
216