Application: gvSIG desktop

import java.net.MalformedURLException;

import org.gvsig.expressionevaluator.ExpressionRuntimeException;

import org.gvsig.expressionevaluator.Formatter;

    public URL getURL(Object[] args, int index) throws MalformedURLException {

        Object obj = getObject(args, index);

        if( obj == null ) {

            return null;

        }  

        URL url;

        if( obj instanceof URL ) {

            url = (URL) obj;        } else if( obj instanceof CharSequence ) {

            url = new URL(((CharSequence)obj).toString());

        } else if( obj instanceof File ) {

            url = ((File)obj).toURI().toURL();

        } else if( obj instanceof URI ) {

            url = ((URI)obj).toURL();

        } else {

            throw new ExpressionRuntimeException("The "+this.name()+" function require a File, URI or a String and a received a '"+obj.getClass().getSimpleName()+"'.");

        }  

        return url;

    }

    @Override

    public String toString(Codes args, Formatter<Code> formatter) {

        return null;

    }