public WriterBasedGenerator(IOContext ctxt, int features, ObjectCodec codec, Writer w) {
   super(features, codec);
   _ioContext = ctxt;
   _writer = w;
   _outputBuffer = ctxt.allocConcatBuffer();
   _outputEnd = _outputBuffer.length;
 }
 @Override
 protected void _releaseBuffers() {
   char[] buf = _outputBuffer;
   if (buf != null) {
     _outputBuffer = null;
     _ioContext.releaseConcatBuffer(buf);
   }
 }
  @Override
  public void close() throws IOException {
    super.close();

    /* 05-Dec-2008, tatu: To add [JACKSON-27], need to close open
     *   scopes.
     */
    // First: let's see that we still have buffers...
    if (_outputBuffer != null && isEnabled(Feature.AUTO_CLOSE_JSON_CONTENT)) {
      while (true) {
        JsonStreamContext ctxt = getOutputContext();
        if (ctxt.inArray()) {
          writeEndArray();
        } else if (ctxt.inObject()) {
          writeEndObject();
        } else {
          break;
        }
      }
    }
    _flushBuffer();

    /* 25-Nov-2008, tatus: As per [JACKSON-16] we are not to call close()
     *   on the underlying Reader, unless we "own" it, or auto-closing
     *   feature is enabled.
     *   One downside: when using UTF8Writer, underlying buffer(s)
     *   may not be properly recycled if we don't close the writer.
     */
    if (_ioContext.isResourceManaged() || isEnabled(Feature.AUTO_CLOSE_TARGET)) {
      _writer.close();
    } else {
      // If we can't close it, we should at least flush
      _writer.flush();
    }
    // Internal buffer(s) generator has can now be released as well
    _releaseBuffers();
  }