source: josm/trunk/src/org/openstreetmap/josm/gui/layer/markerlayer/MarkerProducers.java@ 627

// License: GPL. Copyright 2007 by Immanuel Scholz and others
package org.openstreetmap.josm.gui.layer.markerlayer;

import java.io.File;

import org.openstreetmap.josm.data.gpx.WayPoint;

/**
 * This interface has to be implemented by anyone who wants to create markers.
 * 
 * When reading a gpx file, all implementations of MarkerMaker registered with 
 * the Marker are consecutively called until one returns a Marker object.
 * 
 * @author Frederik Ramm <frederik@remote.org>
 */
public interface MarkerProducers {
        /**
         * Returns a Marker object if this implementation wants to create one for the
         * given input data, or <code>null</code> otherwise.
         * 
         * @param ll lat/lon for the marker position
         * @param data A map of all tags found in the <wpt> node of the gpx file. 
         * @param relativePath An path to use for constructing relative URLs or 
         *        <code>null</code> for no relative URLs
         * @return A Marker object, or <code>null</code>.
         */
        public Marker createMarker(WayPoint wp, File relativePath, MarkerLayer parentLayer, double time, double offset);
}