package org.apache.samoa.moa.tasks;

/*
 * #%L
 * SAMOA
 * %%
 * Copyright (C) 2014 - 2015 Apache Software Foundation
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

/**
 * Class that represents a null monitor.
 * 
 * @author Richard Kirkby (rkirkby@cs.waikato.ac.nz)
 * @version $Revision: 7 $
 */
public class NullMonitor implements TaskMonitor {

  @Override
  public void setCurrentActivity(String activityDescription,
      double fracComplete) {
  }

  @Override
  public void setCurrentActivityDescription(String activity) {
  }

  @Override
  public void setCurrentActivityFractionComplete(double fracComplete) {
  }

  @Override
  public boolean taskShouldAbort() {
    return false;
  }

  @Override
  public String getCurrentActivityDescription() {
    return null;
  }

  @Override
  public double getCurrentActivityFractionComplete() {
    return -1.0;
  }

  @Override
  public boolean isPaused() {
    return false;
  }

  @Override
  public boolean isCancelled() {
    return false;
  }

  @Override
  public void requestCancel() {
  }

  @Override
  public void requestPause() {
  }

  @Override
  public void requestResume() {
  }

  @Override
  public Object getLatestResultPreview() {
    return null;
  }

  @Override
  public void requestResultPreview() {
  }

  @Override
  public boolean resultPreviewRequested() {
    return false;
  }

  @Override
  public void setLatestResultPreview(Object latestPreview) {
  }

  @Override
  public void requestResultPreview(ResultPreviewListener toInform) {
  }
}