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/**
* Author: Sven Gothel <sgothel@jausoft.com>
* Copyright (c) 2020 Gothel Software e.K.
* Copyright (c) 2020 ZAFENA AB
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package direct_bt.tinyb;
import org.tinyb.BluetoothFactory;
public abstract class DBTNativeDownlink
{
protected long nativeInstance;
private boolean isValid;
static {
BluetoothFactory.checkInitialized();
}
protected DBTNativeDownlink(final long nativeInstance)
{
this.nativeInstance = nativeInstance;
isValid = true;
initNativeJavaObject(nativeInstance);
}
protected final boolean isValid() { return isValid; }
@Override
protected void finalize()
{
delete();
}
/**
* Deletes the native instance in the following order
* <ol>
* <li>Removes this java reference from the native instance</li>
* <li>Deletes the native instance via {@link #deleteImpl()}</li>
* <li>Sets the nativeInstance := 0</li>
* </ol>
*/
public synchronized void delete() {
if (!isValid) {
return;
}
isValid = false;
deleteNativeJavaObject(nativeInstance);
deleteImpl();
nativeInstance = 0;
}
/**
* Called from native JavaUplink dtor -> JavaGlobalObj dtor,
* i.e. native instance destructed in native land.
*/
private synchronized void notifyDeleted() {
isValid = false;
nativeInstance = 0;
// System.err.println("***** notifyDeleted: "+getClass().getSimpleName()+": valid "+isValid+" -> false, handle 0x"+Long.toHexString(nativeInstance)+" -> null: "+toString());
}
/**
* Deletes the native instance.
* <p>
* Called via {@link #delete()} and at this point this java reference
* has been removed from the native instance.
* </p>
*/
protected abstract void deleteImpl();
private native void initNativeJavaObject(final long nativeInstance);
private native void deleteNativeJavaObject(final long nativeInstance);
}
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