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      1 /*
      2  * Copyright (C) 2003, 2008, 2010 Apple Inc. All rights reserved.
      3  * Copyright 2010, The Android Open Source Project
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *  * Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  *  * Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #ifndef JavaInstanceV8_h
     28 #define JavaInstanceV8_h
     29 
     30 #include "npruntime.h"
     31 
     32 #include <JavaVM/jni.h>
     33 #include <wtf/RefCounted.h>
     34 #include <wtf/RefPtr.h>
     35 
     36 using namespace WTF;
     37 
     38 namespace JSC {
     39 
     40 namespace Bindings {
     41 
     42 class JavaClass;
     43 
     44 class JObjectWrapper {
     45 friend class RefPtr<JObjectWrapper>;
     46 friend class JavaField;
     47 friend class JavaInstance;
     48 
     49 public:
     50     jobject instance() const { return m_instance; }
     51     void setInstance(jobject instance) { m_instance = instance; }
     52 
     53     void ref() { m_refCount++; }
     54     void deref()
     55     {
     56         if (!(--m_refCount))
     57             delete this;
     58     }
     59 
     60 protected:
     61     JObjectWrapper(jobject);
     62     ~JObjectWrapper();
     63 
     64     jobject m_instance;
     65 
     66 private:
     67     JNIEnv* m_env;
     68     unsigned int m_refCount;
     69 };
     70 
     71 class JavaInstance : public RefCounted<JavaInstance> {
     72 public:
     73     JavaInstance(jobject instance);
     74     virtual ~JavaInstance();
     75 
     76     JavaClass* getClass() const;
     77 
     78     bool invokeMethod(const char* name, const NPVariant* args, int argsCount, NPVariant* result);
     79 
     80     jobject javaInstance() const { return m_instance->m_instance; }
     81 
     82     // These functions are called before and after the main entry points into
     83     // the native implementations.  They can be used to establish and cleanup
     84     // any needed state.
     85     void begin() { virtualBegin(); }
     86     void end() { virtualEnd(); }
     87 
     88 protected:
     89     RefPtr<JObjectWrapper> m_instance;
     90     mutable JavaClass* m_class;
     91 
     92     virtual void virtualBegin();
     93     virtual void virtualEnd();
     94 };
     95 
     96 } // namespace Bindings
     97 
     98 } // namespace JSC
     99 
    100 #endif // JavaInstanceV8_h
    101