source: josm/trunk/src/org/openstreetmap/josm/gui/mappaint/ElemStyles.java@ 627

package org.openstreetmap.josm.gui.mappaint;

import java.util.HashMap;
import java.util.Iterator;

import org.openstreetmap.josm.data.osm.OsmPrimitive;
public class ElemStyles
{
        HashMap<String, ElemStyle> styles;
        static int nr = 0;


        public ElemStyles()
        {
                styles = new HashMap<String, ElemStyle>();
        }

        public void add (String k, String v, ElemStyle style)
        {
                ElemStyle  old_style;
                String key = k + "=" + v;
                
                /* unfortunately, there don't seem to be an efficient way to */
                /* find out, if a given OsmPrimitive is an area or not, */
                /* so distinguish only between way and node here - for now */
                if(style instanceof AreaElemStyle) {
                        key = key + "way";
                }
                else if(style instanceof LineElemStyle) {
                        key = key + "way";
                }
                else if(style instanceof IconElemStyle) {
                        key = key + "node";
                }
                /* avoid duplicates - for now */
                old_style = styles.get(key);
                if(old_style == null) {
                        /* new key/value, insert */
                        styles.put(key, style);
                } else {
                        if(style.getMaxScale() < old_style.getMaxScale()) {
                                /* existing larger scale key/value, replace */
                                styles.remove(old_style);
                                styles.put(key, style);
                        }
                }
        }

        public ElemStyle getStyle (OsmPrimitive p)
        {
                if(p.keys!=null)
                {
                        String classname;
                        String kv = null;
                        
                        if(p instanceof org.openstreetmap.josm.data.osm.Node) {
                                classname = "node";
                        } else {
                                classname = "way";
                        }
                        Iterator<String> iterator = p.keys.keySet().iterator();
                        while(iterator.hasNext())       
                        {
                                String key = iterator.next();
                                kv = key + "=" + p.keys.get(key) + classname;
                                if(styles.containsKey(kv))
                                {
                                        return styles.get(kv);
                                }
                        }

            // not a known key/value combination
                        boolean first_line = true;

            // filter out trivial tags and show the rest
                        iterator = p.keys.keySet().iterator();
                        while(iterator.hasNext())       
                        {
                                String key = iterator.next();
                                kv = key + "=" + p.keys.get(key);
                                if(     !kv.startsWith("created_by=") &&
                                        !kv.startsWith("converted_by=") &&
                                        !kv.startsWith("source=") &&
                                        !kv.startsWith("note=") &&
                                        !kv.startsWith("layer=") &&
                                        !kv.startsWith("bridge=") &&
                                        !kv.startsWith("tunnel=") &&
                                        !kv.startsWith("oneway=") &&
                                        !kv.startsWith("speedlimit=") &&
                                        !kv.startsWith("motorcar=") &&
                                        !kv.startsWith("horse=") &&
                                        !kv.startsWith("bicycle=") &&
                                        !kv.startsWith("foot=")
                                        ) {
                                                
                                        if (first_line) {
                                                nr++;
                                                //System.out.println("mappaint - rule not found[" + nr + "]: " + kv + " id:" + p.id);
                                        } else {
                                                //System.out.println("mappaint - rule not found[" + nr + "]: " + kv);
                                        }
                                        first_line=false;
                                }
                        }
                }
                
                return null;
        }

        public boolean isArea(OsmPrimitive p)
        {
                return getStyle(p) instanceof AreaElemStyle;
        }
}