Issue 5556 - make C++ implementation of LogSystem manageable only by JsEngine

libadblockplus-android/src/org/adblockplus/libadblockplus/LogSystem.java

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 package org.adblockplus.libadblockplus;
 
-public abstract class LogSystem implements Disposable
+public interface LogSystem
 {
-  private final Disposer disposer;
-  protected final long ptr;
-
-  static
-  {
-    System.loadLibrary("adblockplus-jni");
-    registerNatives();
-  }
-
-  public LogSystem()
-  {
-    this.ptr = ctor(this);
-    this.disposer = new Disposer(this, new DisposeWrapper(this.ptr));
-  }
-
-  public static enum LogLevel
+  enum LogLevel
   {
     TRACE, LOG, INFO, WARN, ERROR;
   }
 
-  public abstract void logCallback(LogLevel level, String message, String source);
-
-  @Override
-  public void dispose()
-  {
-    this.disposer.dispose();
-  }
-
-  private final static class DisposeWrapper implements Disposable
-  {
-    private final long ptr;
-
-    public DisposeWrapper(final long ptr)
-    {
-      this.ptr = ptr;
-    }
-
-    @Override
-    public void dispose()
-    {
-      dtor(this.ptr);
-    }
-  }
-
-  private final static native void registerNatives();
-
-  private final static native long ctor(Object callbackObject);
-
-  private final static native void dtor(long ptr);
+  void logCallback(LogLevel level, String message, String source);
 }