assimp/port/jAssimp/jni_bridge/JNIEnvironment.cpp

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/*
---------------------------------------------------------------------------
Open Asset Import Library (ASSIMP)
---------------------------------------------------------------------------
Copyright (c) 2006-2008, ASSIMP Development Team
All rights reserved.
Redistribution and use of this software in source and binary forms,
with or without modification, are permitted provided that the following
conditions are met:
* Redistributions of source code must retain the above
copyright notice, this list of conditions and the
following disclaimer.
* 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.
* Neither the name of the ASSIMP team, nor the names of its
contributors may be used to endorse or promote products
derived from this software without specific prior
written permission of the ASSIMP Development Team.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"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 THE COPYRIGHT
OWNER 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.
---------------------------------------------------------------------------
*/
/** @file Implementation of the JNI API for jAssimp */
#if (defined ASSIMP_JNI_EXPORT)
#include "JNIEnvironment.h"
#include "JNILogger.h"
using namespace Assimp;
namespace Assimp {
namespace JNIBridge {
/*static*/ jclass JNIEnvironment::Class_java_lang_String = 0;
/*static*/ jmethodID JNIEnvironment::MID_String_getBytes = 0;
/*static*/ jmethodID JNIEnvironment::MID_String_init = 0;
// ------------------------------------------------------------------------------------------------
bool JNIEnvironment::AttachToCurrentThread (JNIEnv* pcEnv)
{
ai_assert(NULL != pcEnv);
// first initialize some members
if (0 == Class_java_lang_String)
{
if( 0 == (Class_java_lang_String = pcEnv->FindClass("java.lang.String")))
return false;
}
if (0 == MID_String_getBytes)
{
if( 0 == (MID_String_getBytes = pcEnv->GetStaticMethodID(
Class_java_lang_String,"getBytes","()[byte")))
return false;
}
if (0 == MID_String_init)
{
if( 0 == (MID_String_init = pcEnv->GetStaticMethodID(
Class_java_lang_String,"String","([byte)V")))
return false;
}
// now initialize the thread-local storage
if (NULL == this->ptr.get())
{
// attach to the current thread
JavaVM* vm;
pcEnv->GetJavaVM(&vm);
vm->AttachCurrentThread((void **) &pcEnv, NULL);
this->ptr.reset(new JNIThreadData(pcEnv));
}
// increase the reference counter
else this->ptr->m_iNumRef++;
// attach the logger
((JNILogDispatcher*)DefaultLogger::get())->OnAttachToCurrentThread(this->ptr.get());
return true;
}
// ------------------------------------------------------------------------------------------------
bool JNIEnvironment::DetachFromCurrentThread ()
{
ai_assert(NULL != pcEnv);
// detach the logger
((JNILogDispatcher*)DefaultLogger::get())->OnDetachFromCurrentThread(this->ptr.get());
// decrease the reference counter
if (NULL != this->ptr.get())
{
this->ptr->m_iNumRef--;
if (0 == this->ptr->m_iNumRef)
{
JavaVM* vm;
this->ptr->m_pcEnv->GetJavaVM(&vm);
vm->DetachCurrentThread();
}
}
return true;
}
// ------------------------------------------------------------------------------------------------
JNIThreadData* JNIEnvironment::GetThread()
{
ai_assert(NULL != this->ptr.get());
return this->ptr.get();
}
// ------------------------------------------------------------------------------------------------
jstring JNU_NewStringNative(JNIEnv *env, const char *str)
{
jstring result;
jbyteArray bytes = 0;
int len;
if (env->EnsureLocalCapacity( 2) < 0)
{
return NULL; /* out of memory error */
}
len = strlen(str);
bytes = env->NewByteArray(len);
if (bytes != NULL)
{
env->SetByteArrayRegion(bytes, 0, len,
(jbyte *)str);
result = (jstring)env->NewObject(JNIEnvironment::Class_java_lang_String,
JNIEnvironment::MID_String_init, bytes);
env->DeleteLocalRef(bytes);
return result;
} /* else fall through */
return NULL;
}
// ------------------------------------------------------------------------------------------------
char *JNU_GetStringNativeChars(JNIEnv *env, jstring jstr)
{
jbyteArray bytes = 0;
jthrowable exc;
char *result = 0;
if (env->EnsureLocalCapacity(2) < 0)
{
return 0; /* out of memory error */
}
bytes = (jbyteArray)env->CallObjectMethod(jstr,JNIEnvironment::MID_String_getBytes);
exc = env->ExceptionOccurred();
if (!exc)
{
jint len = env->GetArrayLength(bytes);
result = (char *)malloc(len + 1);
if (result == 0)
{
env->DeleteLocalRef(bytes);
return 0;
}
env->GetByteArrayRegion(bytes, 0, len,
(jbyte *)result);
result[len] = 0; /* NULL-terminate */
}
else
{
env->DeleteLocalRef(exc);
}
env->DeleteLocalRef(bytes);
return result;
}
};};
#endif // ! JNI only