Issue 98 - Use the libadblockplus update mechanism

src/org/adblockplus/libadblockplus/UpdateAvailableCallback.java

Index: src/org/adblockplus/libadblockplus/UpdateAvailableCallback.java
===================================================================
new file mode 100644
--- /dev/null
+++ b/src/org/adblockplus/libadblockplus/UpdateAvailableCallback.java
@@ -0,0 +1,66 @@
+/*
+ * This file is part of Adblock Plus <http://adblockplus.org/>,
+ * Copyright (C) 2006-2014 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 UpdateAvailableCallback implements Disposable
+{
+  private final Disposer disposer;
+  protected final long ptr;
+
+  static
+  {
+    System.loadLibrary("adblockplus-jni");
+    registerNatives();
+  }
+
+  public UpdateAvailableCallback()
+  {
+    this.ptr = ctor(this);
+    this.disposer = new Disposer(this, new DisposeWrapper(this.ptr));
+  }
+
+  public abstract void updateAvailableCallback(String url);
+
+  @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);
+}