/* 
    * Copyright (C) 2016 Hobrasoft s.r.o.
    *
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU Affero General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
    *
    * This program 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 Affero General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   */
  package cz.hobrasoft.pdfmu.operation;
  
  import cz.hobrasoft.pdfmu.TextOutput;
  import cz.hobrasoft.pdfmu.WritingMapper;
  import cz.hobrasoft.pdfmu.jackson.Result;
  import cz.hobrasoft.pdfmu.jackson.RpcResponse;
  import java.io.IOException;
  import java.util.logging.Logger;
  
  public abstract class OperationCommon implements Operation {
  
      private WritingMapper wm = null;
      protected TextOutput to = new TextOutput(); // Discard messages by default
      private static final Logger logger = Logger.getLogger(OperationCommon.class.getName());
  
      @Override
      public void setWritingMapper(WritingMapper wm) {
          this.wm = wm;
      }
  
      protected void writeResult(Result result) {
          // Discard value if mapper was not set
          if (wm != null) {
              RpcResponse response = new RpcResponse(result);
              try {
                  wm.writeValue(response);
              } catch (IOException ex) {
                  logger.severe(String.format("Cannot write JSON document: %s", ex));
              }
          }
      }
  
      @Override
      public void setTextOutput(TextOutput to) {
          this.to = to;
      }
  }