code: /*******************************************************************************
   * Copyright (c) 2013 Attila Kovacs <attila[AT]sigmyne.com>.
   * All rights reserved. 
   * 
   * This file is part of crush.
   * 
   *     crush is free software: you can redistribute it and/or modify
   *     it under the terms of the GNU General Public License as published by
   *     the Free Software Foundation, either version 3 of the License, or
   *     (at your option) any later version.
   * 
   *     crush 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 crush.  If not, see <http://www.gnu.org/licenses/>.
   * 
   * Contributors:
   *     Attila Kovacs <attila[AT]sigmyne.com> - initial API and implementation
   ******************************************************************************/
  package crush.filters;
  
  
  import crush.Channel;
  import crush.Frame;
  import crush.Integration;
  
  public abstract class FixedFilter extends Filter {
  	/**
  	 * 
  	 */
  	private static final long serialVersionUID = 8317718290223682350L;
  	
  
  	private double rejected = 0.0;
  	
  	
  	public FixedFilter(Integration<?> integration) {
  		super(integration);
  	}
  
  	public FixedFilter(Integration<?> integration, float[] data) {
  		super(integration, data);
  	}
  
  	@Override 
  	protected void preFilter() {
  		super.preFilter();
  		rejected = countParms();
  	}
  	
  	@Override
  	protected void postFilter() {
  		super.postFilter();	
  	}
  	
  	@Override
  	protected void preFilter(Channel channel) {
  		super.preFilter(channel);
  		double response = getPointResponse(channel);
  		channel.directFiltering /= response;
  		channel.sourceFiltering /= response;
  	}
  	
  	@Override
  	protected void postFilter(Channel channel) {
  		super.postFilter(channel);
  		
  		double response = calcPointResponse(channel);
  		setPointResponse(channel, response);
  		channel.directFiltering *= response;
  		channel.sourceFiltering *= response;
  		
  		parms.addAsync(channel, rejected);		
  		
  		if(points > 0.0 && frameParms != null) addFrameParms(channel);
  	}
  	
  	protected void addFrameParms(Channel channel) {
  		final double dp = rejected / points;
  		final int c = channel.getIndex();
  		
  		integration.validParallelStream(Frame.MODELING_FLAGS).filter(f -> f.sampleFlag[c] == 0)
  		.forEach(f -> frameParms[f.index] += f.relativeWeight * dp);
  	}
  	
  
  }
  