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 * ImageJ software for multidimensional image processing and analysis.
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package imagej.core.commands.binary;

import imagej.command.ContextCommand;
import imagej.data.Dataset;
import net.imglib2.ops.types.ConnectedType;
import net.imglib2.type.logic.BitType;
import net.imglib2.type.numeric.RealType;

import org.scijava.ItemIO;
import org.scijava.plugin.Parameter;

/**
 * Abstract super class for commands that modify binary images in place.
 * 
 * @author Barry DeZonia
 */
public abstract class AbstractBinaryCommand extends ContextCommand {

	// -- constants --

	public static final String FOUR = "Four";
	public static final String EIGHT = "Eight";

	// -- Parameters --

	@Parameter(type = ItemIO.BOTH)
	private Dataset dataset;

	@Parameter(label = "Neighbors", choices = { FOUR, EIGHT })
	private String neighbors = EIGHT;

	// -- abstract methods --

	abstract protected void updateDataset(Dataset ds);

	// -- accessors --

	public ConnectedType getConnectedType() {
		if (neighbors == FOUR) return ConnectedType.FOUR_CONNECTED;
		return ConnectedType.EIGHT_CONNECTED;
	}

	public void setConnectedType(ConnectedType type) {
		if (type.equals(ConnectedType.FOUR_CONNECTED)) neighbors = FOUR;
		else neighbors = EIGHT;
	}

	// -- Command methods --

	@Override
	public void run() {
		if (!isBitType(dataset)) {
			cancel("This command requires input dataset to be of type BitType.");
		}
		else updateDataset(dataset);
	}

	// -- helpers --

	private boolean isBitType(Dataset ds) {
		RealType<?> type = ds.getImgPlus().firstElement();
		return (type instanceof BitType);
	}
}

Define base class for morphological ops