Example to test Macro recordability of Scijava components

Test.java

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Map;

import org.scijava.ItemVisibility;
import org.scijava.command.Command;
import org.scijava.command.DynamicCommand;
import org.scijava.module.MutableModuleItem;
import org.scijava.plugin.Parameter;
import org.scijava.plugin.Plugin;
import org.scijava.widget.Button;

import net.imagej.ImageJ;
import net.imagej.lut.LUTService;
import net.imglib2.display.ColorTable;

@Plugin(type = Command.class, menuPath = "Plugins>Failed Recorded Cmd", initializer = "init")
public class Test extends DynamicCommand {

	@Parameter
	private LUTService lutService;

	/* Prompt */
	@Parameter(required = false, visibility = ItemVisibility.MESSAGE, label = "A message")
	private String aMsg;

	@Parameter(label = "A double", required = false)
	private double aDouble;

	@Parameter(label = "A boolean", required = false)
	private boolean aBoolean;

	@Parameter(label = "A button", required = false)
	private Button aButton;

	@Parameter(label = "A string choice", required = false, callback = "lutChoiceChanged")
	private String lutChoice;

	@Parameter(label = " A Colortable", required = false)
	private ColorTable aTable;

	@Parameter(label = "A file", required = false)
	private File aFile;

	private Map<String, URL> luts;

	@SuppressWarnings("unused")
	private void init() {
		// see net.imagej.lut.LUTSelector
		luts = lutService.findLUTs();
		final ArrayList<String> choices = new ArrayList<>();
		for (final Map.Entry<String, URL> entry : luts.entrySet()) {
			choices.add(entry.getKey());
		}
		Collections.sort(choices);
		final MutableModuleItem<String> input = getInfo().getMutableInput("lutChoice", String.class);
		input.setChoices(choices);
		input.setValue(this, lutChoice);
		if (lutChoice == null) lutChoice = "Fire.lut";
		if (aFile == null) aFile = new File("/some/file/path");
		lutChoiceChanged();
	}

	private void lutChoiceChanged() {
		try {
			aTable = lutService.loadLUT(luts.get(lutChoice));
		} catch (final NullPointerException | IOException ignored) {
			// do nothing
		}
	}

	public static void main(final String[] args) {
		final ImageJ ij = new ImageJ();
		ij.ui().showUI();
		ij.command().run(Test.class, true);
	}
}