import ij.*;
import ij.plugin.*;
import java.net.*;
import java.security.*;

/** This plugin demonstrates how to use the Class.getProtectionDomain()
	method to get the location of a plugin. It requires ImageJ 1.43, which
	has an enhanced PluginClassLoader contributed by Kevin Moll. */
public class Plugin_Locator implements PlugIn {

	public void run(String arg) {
		if (IJ.versionLessThan("1.43b")) return;
		showLocation(this.getClass());
		String name = "Kalman_Stack_Filter";
		try {
			showLocation(Class.forName(name));
		} catch(Exception e) {
			IJ.log(""+e);
		}

		// You can also use Class.getResource() to get the location
		URL url =getClass().getResource(name+".class");
		if (url!=null) {
			String path = url.toString().replaceAll("%20", " ");
			IJ.log(name+": "+path);
		} else
			IJ.log(name+" not found");
	}

	void showLocation(Class aClass) {
		ProtectionDomain domain = aClass.getProtectionDomain();
		CodeSource source = domain.getCodeSource();
		URL location = source.getLocation();
		if (location!=null) {
			String path = location.getFile().replaceAll("%20", " ");
			IJ.log(aClass.getName()+": "+path);
		} else
			IJ.log(aClass.getName()+": not found");
	}

}