Chris@37: /*
Chris@37:     jVamp
Chris@37: 
Chris@37:     A Java host interface for Vamp audio analysis plugins
Chris@37: 
Chris@37:     Centre for Digital Music, Queen Mary, University of London.
Chris@37:     Copyright 2012 Chris Cannam and QMUL.
Chris@37:   
Chris@37:     Permission is hereby granted, free of charge, to any person
Chris@37:     obtaining a copy of this software and associated documentation
Chris@37:     files (the "Software"), to deal in the Software without
Chris@37:     restriction, including without limitation the rights to use, copy,
Chris@37:     modify, merge, publish, distribute, sublicense, and/or sell copies
Chris@37:     of the Software, and to permit persons to whom the Software is
Chris@37:     furnished to do so, subject to the following conditions:
Chris@37: 
Chris@37:     The above copyright notice and this permission notice shall be
Chris@37:     included in all copies or substantial portions of the Software.
Chris@37: 
Chris@37:     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
Chris@37:     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
Chris@37:     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
Chris@37:     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
Chris@37:     ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
Chris@37:     CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
Chris@37:     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Chris@37: 
Chris@37:     Except as contained in this notice, the names of the Centre for
Chris@37:     Digital Music; Queen Mary, University of London; and Chris Cannam
Chris@37:     shall not be used in advertising or otherwise to promote the sale,
Chris@37:     use or other dealings in this Software without prior written
Chris@37:     authorization.
Chris@37: */
Chris@0: 
Chris@55: #ifndef JVAMP_HANDLE_H_INCLUDED
Chris@55: #define JVAMP_HANDLE_H_INCLUDED
Chris@0: 
Chris@0: inline jfieldID getHandleField(JNIEnv *env, jobject obj)
Chris@0: {
Chris@0:     jclass c = env->GetObjectClass(obj);
Chris@0:     return env->GetFieldID(c, "nativeHandle", "J");
Chris@0: }
Chris@0: 
Chris@0: template <typename T>
Chris@0: T *getHandle(JNIEnv *env, jobject obj)
Chris@0: {
Chris@0:     jlong handle = env->GetLongField(obj, getHandleField(env, obj));
Chris@0:     return reinterpret_cast<T *>(handle);
Chris@0: }
Chris@0: 
Chris@0: template <typename T>
Chris@0: void setHandle(JNIEnv *env, jobject obj, T *t)
Chris@0: {
Chris@0:     jlong handle = reinterpret_cast<jlong>(t);
Chris@0:     env->SetLongField(obj, getHandleField(env, obj), handle);
Chris@0: }
Chris@0: 
Chris@0: #endif