package pl.wroc.pwr.imagechannel.basic;

import pl.wroc.pwr.IOperator;
import pl.wroc.pwr.imagechannel.IImageChannel;
import pl.wroc.pwr.imagechannel.factory.ImageChannelFactory;

public class LimitUpper implements IOperator< IImageChannel >
{
	private IImageChannel inputChannel;
	private boolean inPlace;
	final private float upperValue;

	public LimitUpper( IImageChannel channel ) {
		this(channel,1,false);
	}

	public LimitUpper( IImageChannel channel, boolean inPlace ) {
		this(channel,1,inPlace);
	}

	public LimitUpper( IImageChannel channel, float upperValue, boolean inPlace ) {
		this.inputChannel = channel;
		this.upperValue = upperValue;
		this.inPlace = inPlace;
		System.out.println("LimitUpper on " + this.inputChannel + " with upperValue " + this.upperValue + ", inPlace " + this.inPlace); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
	}

	public IImageChannel apply( )
	{
		IImageChannel outputChannel = null;
		if ( this.inputChannel == null ) {
			return null;
		}
		outputChannel = this.inPlace ? this.inputChannel : new ImageChannelFactory(this.inputChannel).apply();
		final int maxIndex = this.inputChannel.getMaxIndex();
		for ( int i = 0; i < maxIndex; i++ ) {
			outputChannel.setValue( i, Math.min( this.inputChannel.getValue( i ), this.upperValue ) );
		}
		return outputChannel;
	}
}